 OPERATING
 INSTRUCTIONS

                 OPTIMA 314

                                    SW 1.4

THE AIR WE BREATHE
TABLE OF CONTENTS

1. Installation..............................................................................................................................................................................3
2. Programming the Optima 314 controller....................................................................................................................4
3. Display......................................................................................................................................................................................5
4. Start-up...................................................................................................................................................................................6
5. Controller menu....................................................................................................................................................................7
6. Controller settings..............................................................................................................................................................8
7. Further explanations of humidity and district heating control.......................................................................24
8. Maintenance........................................................................................................................................................................25
9. Troubleshooting.................................................................................................................................................................26

2 		
 1. INSTALLATION

   1.1 Installation of the Optima Touch control
   panel

    The control panel is designed to be mounted onto a flat
    wall.

   1.2 Mounting

    Find the location on the wall where you will fix the control
    panel and mark the screw-hole positions. A min. of four
    screws must be used to fix the display fixture to the wall.
    Drilling of holes, hole size and the corresponding screws for
    fixing the panel depends on the wall material.

    When the display fixture has been securely installed to the
    wall. Take the Optima Touch display which comes with a
    preinstalled wire connected and clip the display carefully
    on the fixture. Ensure that the cable is carefully positioned
    as indicated on the picture before fitting the display.

    NOTE: if the preinstalled 1,8 meter length is not sufficient,
    it is possible to replace this with a 4 wire twisted pairs 0,25
    mm2 cable with a maximum length of 50 meters.

    To remove the display , carefully push the plastic clip
    (locking mechanism) as indicated on the picture.

    For additional information on connecting the control panel
    to Optima 314 – please refer to the electrical diagram in
    the installation manual.

    Important information

       Safety information

        This appliance can be used by children aged from 8
        years and above and persons with reduced physical,
        sensory or mental capabilities or lack of experience
        and knowledge if they have been given supervision or
        instruction concerning use of the appliance in a safe
        way and understand the hazards involved. Children
        shall not play with the appliance. Cleaning and user
        maintenance shall not be made by children without
        supervision. Rights to make any design or technical
        modifications are reserved.

		3
2. PROGRAMMING THE OPTIMA 314

         CONTROLLER                                                                                                                                                   141
                                                                                                                                                                            303
                                                                                       25                                                                                       106                  A                                                                        A

         The control system comes factory-preset, which means                                                                                                                                       Exhaust1a6i0r          170                  170                       S1u6p0ply air

        that the unit can beAp(ut1in:to6o)peration without changing the                                                                                                                                                  4                       5                         6                       1157
                                                                                                                                                                                                                                    Bypass motor
         operating settings. The factory setting is only a basic
         setting that can be adapted to t1he operating de2 sires and 3                                                                                                                                                                                                          Internet           302
         demands for the dwelling in question to make it possible to                                                                                                                                                                                                          Cocaorsne/nGe4c-tiEoxntract air filter
         achieve optimal utilisation and operation for the system.
         Depending on the product configuration it will be possible                                                                                                                                                                                                             Display
ating c3o/i4l "tcinooRleGnetnitehcetrocroonnnteocpt othfethOepmtiamAcahidniespolra(ycdoinrneecctlH3tey/oPe4Matr”1tosi/RnFmt7Ggh-caeSouripDklpoeliyusdatpilrelftialteyr                                                                                                          connection
         with “display”) or directly on the Optima 314 Controller
         PCB.

The Optima 314 controller PCB connection inter9f0aWcSeupply air fan                                                                                                                                                                                                           90W Extract air fan

includes terminals for connecting both Modbus MasterB(yfpoasrs                                                                                                                                      Ou1t6d0oor air                                                           Extract 1a6ir0
                                                                                                                                                                                                         5
example building management systems) and1M200oWdEblecutrsic Sprelahevateer
devices (for example mixing valve controller - or fire b(Oopxtional)

PCB).

2.3. Installation w5i0th50OB ptima Touch display Counterflow heat exchanger                                                                                                                                                 142                  142

23Ho1.3t4.w1aa.tnCe3dro/4oan”udntRljeeGutcsttasne1Ot5t0pintgims aasT1on5ue0cchescsoaC3n/ort4ylrd”.oRwlGlaeterrtinoletthe Optima                                                                                                                                  Sverigesvej 6, DK-6100 Haderslev, Denmar
                                                                                                                                                                                                                                                                 Tel: (+45) 73 53 27 00

NOTE: The Optima 314 coHonttwroalteler rciprcaurlaatimoneters can be saved                                                                                                                                                  Project number/name                               CondeDnessiegnre-d Hbyeating moSdheeet number

to  the  Optima  Touch  for  13/v4"eRnGtilation  unit  aEnCvodanpdoberanetsoerr                                                                                          -           Heating  mode                          Combi Blueline                                    Evapokrgatthomr - Cooling mo1de/2
                                                                                                                                                                         -           Cooling  mode                          Part stock number Part name:                      Rev. Approved by           Approved date
                                                                                                                                                                                                                            013014               Combi Blueline
transferred to a similar system by using the                                                                                                                                                                                                                                          CLA                28-09-20

“EA1 Save“ and “EA2 load settings”.                                                                                                                                                                                         General Tolerances   Projection      Material                  Weight        Scale        A
                                                                                                                                                                                                                            DIN 2768-1 m
                             3                                                                                                                                                                                                                                                             210,000 kg 1 : 6
         2                                                                                                                                                            4                                                               6                                    7                                    8

                             C
                                                                             Drain - Exhaust air
                                                                               Drain - Supply air

                                                                                                                                                                                                                                                                              Optima 314 controller

                                                                                                                                                                                                                   5/4” anode
                             D

                                                                                                                                                                                                                   1 kW electric heating element

                                                                                                                                                                                                                   185 L. tank
                             E

4 	 F 	
3. DISPLAY

Userinterface Optima Touch – main screen                      Touch to activate green light       Touch to access
                                                              indicating that active cooling      the status
  Touch to change room temperature setpoint (influences       operation is allowed if required.   information,
  opening of summer bypass for room cooling etc.)             If no green light is shown active   alarms and
  If menu EI5 is set to zone 2 and 3, the zonecontrol         cooling is disabled. If EH2 is set  event log menu.
  temperature setpoint will be indicated next to the general  to 0 the icon will be removed
  room temperature setpoint.                                  from the display.

  Touch to change fan speed
  The actual fan speed will be
  indicated by colored fans
  indicating fan speed 1-4
  Standby will only be shown
  when menu EC3 is set to ON.
  Please notice that fans will
  have a delay of 3-4 minutes
  until they are switched off.

Touch to increase fan speed to
step 3 for 30 minutes (time
adjustable in menu A5).

Touch to access filter menu.       Touch to activate green light     Touch to access the          Touch to go
Here the filter timer can be       indicating that DHW electrical    user and service             back to
reset and the actual number of     heating operation is allowed if   menu.                        previous menu.
hours the filters has been in      required. If no green light is
operation can be read.             shown the DHW electrical
Note - the filter timer will only  heating is disabled.
be shown if D3 lockscreen
time has been set to 0,            If EH5 is set to 0 the icon will
otherwise lockscreen timer         be removed from the display.
will be visible.

Tap to change the room temperature                                   At the bottom of the display:
setting (affects the opening of the                                  *Micro USB interface for PC
bypass for room cooling, etc.).                                      programming of Optima 314
                                                                     controller parameters.

                                                                     *micro sd card – card reader for
                                                                     firmware update of controller and
                                                                     display.

		5
4. START-UP

4.1 Userinterface Optima Touch – initial start up           4.2 Userinterface Optima Touch – screen saver

During initial start up of the Optima 314 ventilation       Depending on the screen saver settings in menu D – display.
controller and with the Optima Touch connected to the       The current screen displayed will switch back to screen
controller, the following information will be shown.        saver mode after 2 minutes. If D2 is set to 0 then the
                                                            screensaver will be permanently active. If a time is set in
Please wait approximately 1 minute for the initial boot     D2 the screensaver will switch to blank screen according to
sequence to complete.                                       the time set.

Software version controller: actual software version of     To reenter the main menu – touch the screen gently for 2
Optima 314 controller.                                      seconds until the screen reactivates.

Software version display: actual software version of
display.

Device ID: the ID of the internet connection secure         Current time  Current indoor and outdoor
protocol device in the controller.                          and date      temperature. Based on
                                                                          measurements locally in
IP address: will only be shown if the ventilation unit has                ventilation unit (fresh air
been connected to a router via RJ45 connection                            and extract air sensors)

Internet connection status: will indicate whether internet
connection status is connected or disconnected. If status
indicates “disconnected” no connection through Genvex
Connect app or remote monitoring/ remote service can be
done.

                                                            Screen saver

6 		
 5. CONTROLLER MENU

   5.1Structure, user and service menu in Optima
       Touch

    The user and service menu structure in the Optima Touch
    display is organized in the following sections
    A. User: main user settings
    B.	Scheduler: calendar schedules for change of fan speeds

         and temperature setpoints
    C.	Date/time: date and time settings for info screen and

         for time stamping event log
    D.	Display: settings related to display and access to

         parameters
    E.	Service: service menu – please note that this menu

         should primarily be used by technicians with knowledge
         of the machine operation.

		7
6. CONTROLLER SETTINGS

Menu                 Description                                                                 Factory setting and
A1 - Reheating                                                                                   (max./min. values)

A2 - Humidity        If there is a reheater fitted to the system, you can choose if the          A1: On
control              reheater should operate. If the set point is set to OFF, the heater will    (On/Off)
A3 – DHW             not operate, even when this is necessary. If the set point is set to ON,
temperature          the heater will start, as required. It regulates in accordance with the
A4 – DHW element     temperature set in item 1 of the User Menu.

A5 - Boost time      Here you turn on humidity control. It must be set to ON in order to be      A2: On
                     active.                                                                     (On/Off)

                     Here the domestic hot water temperature controlled by the heat              A3: 52 °C
                     pump can be set. The temperature setpoint is related to the bottom          (0-60 °C)
                     temperature sensor of the DHW cylinder

                     Here the domestic hot water temperature controlled by the electrical A4: 50 °C
                     immersion heater can be set. The temperature setpoint is related to the (0-65 °C)
                     temperature sensor located in the middle of the DHW cylinder.

                     Set the desired time for temporarily increased fan speed, activated via A5: 30 min.

                     the boost button on the main display.                                       (1-120 min.)

A6 - Timer levels 3  When switching the ventilation unit to fan speed 3 and 4, the system        A6 : On
and 4                will automatically return to fan speed 2 after the number of hours set      (On/Off)
- On/Off             in A5 when adjusting this set point to ON. If the set point is set to Off,
                     the system will run at speed 3 or 4 until the fan speeds are manually
                     changed.

A7 - Timer levels 3 If A6 is set to on , you can enter how many hours the system should run A7: 2 hours

and 4 - hours        on level 3 or 4 before it automatically returns to level 2.                 (1-9 hours)

B1- Fan scheduler    Here four separate timers per day can be set for change of fan speeds.      B1: Not used
                     The scheduler can be adjusted separately for each weekday if required.      (Not used/level 1-4 /
                     If the same values shall be used for all weekdays - the schedule can be     Standby)
                     copied by touching the button "apply to all days"

B2 - Temperature     Here four separate timers per day can be set for change to a low-ered       B2: Not used
scheduler            setpoint temperature (eg. for earlier opening of bypass in summertime       (Not used/Alternative
                     in nighttime). The scheduler can be adjusted separately for each            temp (B5) Normal)
                     weekday if required. If the same values shall be used for all weekdays -
                     the schedule can be copied by touching the button "apply to all days"

B3 – DHW scheduler   Here four separate timers per day can be set for change to a lowered        B3: Not used
                     setpoint temperature. The scheduler can be adjusted separately for          (Not used/Alternative
                     each weekday if required. If the same values shall be used for all          DHW temp (B6)/
                     weekdays - the schedule can be copied by touching the button "apply to      Normal)
                     all days"

8 		
Menu               Description                                                                Factory setting and
                                                                                              (max. / min. values)
B4 - Enable
scheduler          Here it is possible to activate/deactivate the fan schedule set in B1 the  B1 Fan scheduler: Off
                   temp schedule set in B2 and DHW scheduler set in B3                        (On-Off)
                                                                                              B2 Temp. scheduler:
                                                                                              Off (On-Off)
                                                                                              B3 DHW scheduler:
                                                                                              Off (On-Off)

B5 – Alternative   Here it is possible to adjust the lowered temperature setpoint             B5: 0 °C
temperature        selected in B2. The temperature selected here will be an off-set to the    (-10 °C to +10 °C)
                   temperature selected in the main menu “requested temperature”

B6 – Alternative   Here it is possible to adjust the lowered temperature setpoint             B6: -10 °C
DHW temperature    selected in B3. The temperature selected here will be an off-set to the    (-50 °C to +50 °C)
                   temperature selected in the main menu “requested temperature”

C1 - Time          Adjustment of actual time (important for error handling)                   -
                                                                                              -
C2 - Date          Adjustment of actual date (important for error handling)                   C3: On

C3 - Daylight saving Automatic switch over from summer/winter time ON/OFF                     D1 : English (English/
timer                                                                                         Dansk/Deutsch/
                                                                                              Dutch )
D1- Language       Display language can be changed

D2 - Screensaver   Idle time before screensaver activate. 0 = screensaver off                 D2: 10 min.
time                                                                                          (0-600 min.)

D3 - Display lock  Lock time active when touching lock symbol on main screen                  D3: 5 sec.
time
                   If set to 0 seconds – the filtermenu will be displayed instead of the lock (0-120 sec.)

                   screen icon on the main screen.

D4 - Password      Main menu password:                                                        D4: 0000
                   Choose password for locking main menu access. If password is               (0000-9999)
                   selected - the next time the user trying to access the main menu will be
                   prompted for entry of password. To deactivate password prompt use
                   0000 as password

                   Service menu password:
                   Choose password for locking service menu access. If password is
                   selected - the next time the user trying to access the Service menu will
                   be prompted for entry of password. To deactivate password prompt
                   use 0000 as password

D5 - Firmware      Optima 314 controller and display can be firmware updated by use           -
update
                   of a micro-SD card inserted into the SD card reader of the Optima

                   touch display. Touch "start update" when the SD card containing the

                   latest firmware has been inserted into the card reader to update the

                   controller and display.

		9
Menu            Description                                                                     Factory setting and
EA - Save/load                                                                                  (max./min. values)
settings        EA1 - Save settings
                Saves the settings from the Optima314 controller to the display                 -
EB - Fan speed
levels          EA2 - Load settings
                Loads settings stored in EA1 and transfers data to a new Optima 314
                PCB

                EB1 - Level 1 Supply air                                                        EB1: 15%
                Level 1, which is the lowest speed, is usually used when there is nobody        (0-100%)
                home. Both fans can be configured independently of each other for all
                levels so that the air flow in the supply air and in the extract air is equal,
                which provides optimal operation.
                The adjustment of the system must be performed with specialised
                air measuring equipment and can be done without using the main
                regulating damper.
                Configuring the air flows without expert advice is not recommended.
                Incorrect configuration can lead to major energy consumption or
                unpleasant indoor climate.
                Setting option: between 0 and 100%.

                EB2 - Level 2 Supply air                                                        EB2: 30%
                Level 2 is the recommended speed of the system for providing optimal            (0-100%)
                indoor climate. It should be adjusted to the ventilation requirement of
                the dwelling.
                Setting option: between 0 and 100%.

                EB3 - Level 3 Supply air is typically configured to a level with high           EB3: 45%
                activity in the house                                                           (0-100%)

                EB 4 - Level 4 supply air is typically configured to 100 % airflow for a        EB4: 60%
                quick replacement of air in the entire house.                                   (0-100%)
                Remember that a higher air exchange rate increases energy
                consumption.

                EB5 - Level 1 Extract air                                                       EB5: 15%
                The fan speed is adjusted until the same air flow is achieved as the            (0-100%)
                supply air on level 1.

                EB6 - Level 2 Extract air                                                       EB6: 30%
                The fan speed is adjusted until the same air flow is achieved as the            (0-100%)
                supply air on level 2.

                EB7 - Level 3 extract air                                                       EB7: 45%
                The air flow of level 3 is adjusted to the same air flow as the supply air      (0-100%)
                on levels 3 .

                EB8 - Level 4 Extract air                                                       EB8: 60%
                The fan speed is adjusted until the same air flow is achieved as the            (0-100%)
                supply air on level 4.

                EB9 – min. air volume mode                                                      EB9: On
                If set to on, the supply and extract fans will automatically increase           (On/Off)
                fan speed to the values set in EB10 and EB11 - when the heat pump
                activates. This function will ensure that the Combi unit will have the
                most optimal operating conditions.
                If EB9 is set to off - the fans will not automatically increase fan speed
                and if a fan speed is selected which has lower fan speed values than
                EB10 and EB11 - the heat pump will not activate.

10 		
Menu            Description                                                                        Factory setting and
EB - Fan speed                                                                                     (max./min. values)
levels          EB10 – min. air volume extract
                Minimum fan speed % for extract air fan.                                           EB10: 50%
EC - Regulator  If EB9 is on then this will be the fan speed when the heat pump is running.        (0-100 %)
                If EB9 is off then lower fan speeds than this value will prevent the heat
                pump from starting.

                EB11 – min. air volume supply                                                      EB11: 50%
                Minimum fan speed % for supply air fan.                                            (0-100 %)
                If EB9 is on then this will be the fan speed when the heat pump is running.
                If EB9 is off then lower fan speeds than this value will prevent the heat
                pump from starting.

                EB12 - RPM Alarm                                                                   EB12: On

                Off = RPM feedback from fans are not used actively                                 (On/Off)

                On = If RPM feedback from fans reach 0 and fans are expected to run , the

                MVHR unit will shut down and show alarm.

                EB13 - Reset RPM Alarm                                                             EB13: Off
                Activate this function to reset RPM alarm once the problem has been                (On/Off)
                fixed

                EB14 - Balancing mode                                                              EB14: Off
                If activated the fans will run in the set fan speed 1 to 4 continuously            (Off/Fan speed 1/
                which is useful during commissioning of airflow to ensure stable                   Fan speed 2/Fan
                operating conditions.                                                              speed 3/ Fan speed 4)
                The Fan level service mode activation will automatically deactivate after
                approx 6 hours. if 0 is not selected by the user.                                  EC1: T3 Preheat
                                                                                                   (Off/T3 Preheat/
                EC1 - Frost protection                                                             T5 Preheat/
                Off = no frost protection active                                                   Fan reduction)
                T3 preheat = electrical preheater controlled by fresh air temperature
                sensor (T3)
                T5 preheat = electrical preheater controlled by temperature sensor
                (T5) mounted in the discharge of the heatexchanger
                Fan reduction = supply air fan speed is reduced gradualy to maintain
                discharge air temperature sensor (T5) at setpoint value EC2

                EC2 - Frost reduction                                                              EC2: 8 °C
                Adjustable setpoint for frost protection strategy EC1                              (-10 to +10 °C)

                EC3 – Release system stop                                                          EC3: Off
                If this setpoint is set to off, it will not be possible to switch off the fans of  (On/Off)
                the machines. If the setpoint is on , the fans can be switched off. Please be
                aware that shutting off the ventilation for longer periods of time in cold
                ambient temperatures, can lead to condensation in the ductwork

                EC4 – Factory reset                                                                EC4: Off
                Reset (-fans) = reset all controller values to factory settings except fan         (Reset fans/
                speeds                                                                             Reset all)
                Reset all = reset all controller values to factory settings.

		11
Menu            Description                                                                 Factory setting and
EC - Regulator                                                                              (max./min. values)
                EC5 – H3 relay options.
                Preheat = the relay will activate a preheater connected to the relay H3.    EC5: Preheat
                Adjust setpoint EC1 to T3 preheat or T5 preheat.                            (Preheat/Reheat/
                Reheat = the relay will activate a reheater connected to the relay H3.      Always on)
                The reheater connected to H3 will activate if the extract air
                temperature is setpoint – 1 °C and keep running until the extract air
                temperature reaches the setpoint temperature.
                Please be aware that the H3 relay will switch off when the units is in
                heat pump deicing mode.
                Always on = the relay will be on continuously.

                EC6 – AUX Relay H9                                                          EC6: 2
                0 : off                                                                     (0-13)

                1 : The relay is on when the fans are active.

                2: The relay is on when there is a need for additional roomheating.
                Please note that Menu A1 needs to be on as well.

                3: The relay is on when a filterchange is required.

                4: The relay is on when additional cooling is required. Please note that
                Menu EH2 needs to be on as well. To enable cooling activate the green
                light in the cooling icon on the main screen.

                5: The control unit can handle an earth heat exchanger using a damper
                or brine circuit. The relay will be on in case of one of the following two
                conditions:

                If The outdoor temperature, sensor T9, is lower than 5 °C. (preheating of
                air by brine)

                Or if the outdoor temperature, sensor T9 > 15 °C and the room
                temperature is > setpoint + 1°C (precooling of air)

                6: Floor heating control – The relay is switched on when the sensor in
                the tank bottom (T8) is greater than 30°C

                7: Floor heating control – The relay is switched on when the sensor in
                the tank bottom (T8) is greater than 40°C

                8: The relay is switched on when the L1 terminal is short-circuited/
                activated (e.g. kitchen hood). This feature can be used with an
                on/off damper connected to the H9 relay which shuts off towards
                the bathroom when the kitchen hoods is activated to direct the airflow
                on the kitchen hood.

                9: It is possible to connect a solar pump controlled according to EC8 to
                the relay H9. The relay is off when T8 domestic hot water temperature
                reaches 52 °C.

                10: It is possible to connect a solar pump controlled according to EC8 to
                the relay H9. The relay is off when T8 domestic hot water temperature
                reaches 65 °C

                11: The relay is on if there is no error on the fire control system set in
                menu EJ1 connected to the Combi unit.

12 		
Menu            Description                                                                  Factory setting and
EC - Regulator                                                                               (max./min values)

                12: Zone control valve for zone 2. ; when activated the relay will turn on/
                off according to the requested temperature in Zone 2. This function may
                be used to control a zone valve.

                13: Zone control valve for zone 3 ; when activated the relay will turn on/
                off according to the requested temperature in Zone 3. This function may
                be used to control a zone valve.

                EC7 – AUX Relay H10                                                          EC7: 12
                0 : off                                                                      (0-13)

                1 : The relay is on when the fans are active.

                2: The relay is on when there is a need for additional roomheating.
                Please note that Menu A1 needs to be on as well.

                3: The relay is on when a filterchange is required.

                4: The relay is on when additional cooling is required. Please note that
                Menu EH2 needs to be on as well. To enable cooling activate the green
                light in the cooling icon on the main screen.

                5: The control unit can handle an earth heat exchanger using a damper
                or brine circuit. The relay will be on in case of one of the following two
                conditions:

                If the outdoor temperature, sensor T9, is lower than 5 °C. (preheating of
                air by brine). Or if the outdoor temperature, sensor T9 > 15 °C and the
                room temperature is > setpoint + 1°C (precooling of air)

                6: Floor heating control – The relay is switched on when the sensor in
                the tank bottom (T8) is greater than 30°C

                7: Floor heating control – The relay is switched on when the sensor in
                the tank bottom (T8) is greater than 40°C

                8: The relay is switched on when the L1 terminal is short-circuited/
                activated (e.g. kitchen hood). This feature can be used with an on/
                off damper connected to the H9 relay which shuts off towards the
                bathroom when the kitchen hoods is activated to direct the airflow on
                the kitchen hood.

                9: It is possible to connect a solar pump controlled according to EC8 to
                the relay H10. The relay is off when T8 domestic hot water temperature
                reaches 52 °C

                10: It is possible to connect a solar pump controlled according to EC8 to
                the relay H9. The relay is off when T8 domestic hot water temperature
                reaches 65 °C

                11: The relay is on if there is no error on the fire control system set in
                menu EJ1 connected to the Combi unit.

                12: Zone control valve for zone 2. ; when activated the relay will turn on/
                off according to the requested temperature in Zone 2. This function may
                be used to control a zone valve.

                13: Zone controlv valve for zone 3 ; when activated the relay will turn on/
                off according to the requested temperature in Zone 3. This function may
                be used to control a zone valve.

		13
Menu             Description                                                                   Factory setting and
EC – Regulator                                                                                 (max./min. values)
                 EC8 – Solar Hysteresis
ED - Electrical  If a solar collector is connected to the coil of the boiler, use this option  EC8 : 5
heating          to input the temperature difference between the temperature in the            (0-5 °C)
                 solar collector (T9) and the domestic water temperature (T8) that
                 should be reached before the solar pump starts. The solar pump will
                 not stop until T9 is equal to T8. The solar pump will stop under all
                 circumstances once T8 has reached a temperature of 60 °C.

                 ED1 - Regulation electricity                                                  ED1: 3 min.

                 If an electrical preheater or an electrical reheater is installed, it may be (1-30 min.)

                 necessary to adjust the regulation time.

                 ED2 - Preheating temperature                                                  ED2: +3 °C
                 Setpoint temperature for frost protection preheater - see menu EC1            (-15 to +10°C)
                 for reference temperature sensor

                 ED3 - Preheat PI P                                                            ED3: 5
                 P-band for the PI controller for the electrical modulating preheater. The     (1-255)
                 P-band controls the amplification of the controller following a deviation
                 from the set point (speeder)

                 ED4 - Preheat PI I                                                            ED4: 200
                 I-band for the PI controller for the electrical modulating preheater. The     (1-255)
                 function controls how quickly the controller adapts to a deviation of the
                 set point (brake).

                 ED5 - Preheat Reg                                                             ED5: 40 sec.
                 The Preheat Cycle function works, as follows: E.g. necessary output           (10-120 sec.)
                 50% and cycle = 60 sec. means that the controller will switch the
                 preheater on for 30 sec. and off for 30 sec.
                 Note: Please refer to your country-specific regulations on limitations
                 when adjusting this function. The modulating preheater function refers
                 to the value adjusted in set point EC1.The preheater will try to maintain
                 a steady fresh air temperature according to this set point.
                 When the modulating preheater is used, the existing fresh air
                 temperature sensor (T3), which is built into the ventilation unit, can be
                 used as reference. No extra temperature sensor is required.

                 ED6 - Reheat offset                                                           ED6: -2 °C
                 Offset for reheater with reference to the set point for the requested         (-10 to +10°C)
                 temperature.
                 E.g. requested temp = 20°C
                 Offset value = 2 reheater aims to maintain a supply temperature of
                 18°C

                 ED7 - Reheat PI P                                                             ED7: 5
                 P-band for the PI controller for the electrical modulating reheater. The      (1-255)
                 P-band controls the amplification of the controller following a deviation
                 from the set point (speeder).

                 ED8 - Reheat PI I                                                             ED8: 200
                 I-band for the PI controller for the electrical modulating preheater. The     (1-255)
                 function controls how quickly the controller adapts to a deviation of the
                 set point (brake).

14 		
Menu             Description                                                                 Factory setting and
ED - Electrical                                                                              (max./min. values)
heating
                 ED9 - Reheat reg.                                                           ED9: 40 sec.
EE - Bypass      The Reheat Cycle function works, as follows: E.g. necessary output 50%      (10-120 sec.)
                 and cycle = 60 sec. means that the controller will switch the reheater on
EF - Filter      for 30 sec. and off for 30 sec.
                 Note: Please refer to your country-specific regulations on limitations
                 when adjusting this function.
                 The modulating reheater function refers to the value
                 adjusted in selected temperature and chosen sensor for control (see
                 EC3). To allow the reheater to operate adjust set point A1=on;The
                 reheater will try to
                 maintain a steady supply air temperature according to this set point.
                 When using the modulating reheater, it will be necessary to replace
                 the inlet air temperature sensor (T1) in the ventilation unit with a new
                 temperature sensor installed upstream of the reheater.

                 EE1 - Bypass open offset                                                    EE1: 2 °C
                 Here you set the temperature at which the bypass should open. You set       (1-10 °C)
                 a temperature differential, which means that if you want the bypass to
                 be 100% open at e.g. 23°C and if the room set temperature is
                 20°C, this menu item should be set to 3°C. The bypass will open,
                 provided that:
                 1. The extract air temperature is higher than the outdoor air
                 temperature.
                 2. The outdoor air temperature is above the set temperature in EE2.

                 The bypass opens when the temperature reaches the requested
                 temperature + the temperature differential
                 set in this menu item.

                 EE2 - Turn off bypass                                                       EE2: 4°C
                 To prevent the bypass damper from opening at low outdoor air                (0-20°C)
                 temperatures and from blowing cold, unheated air into the dwelling, use
                 this function to configure the lowest outdoor air temperature, at which
                 the damper must be closed. The value is an expression of the greatest
                 difference that may exist between the requested temperature and the
                 lowest outdoor air temperature (offset).
                 Setting option: Between 0 and 20 °C. If 0°C is selected, the function is
                 disabled.

                 EE3 – Bypass time minimum on                                                EE3: 5 min.
                 Bypass will be open minimum according to the setpoint                       (0-60 min.)

                 EF1 - Reset filter timer                                                    EF1: Reset filter

                 select this option to reset filter timer to 0 days

                 The current counter value will display current days since last filterreset

                 EF2 - Filter timer                                                          EF2: 3 months

                 Setpoint for adjusting months until filteralarm will activate 0 months = (0-12 months)

                 filter timer deactivated.

		15
Menu            Description                                                                  Factory setting and
EF - Filter                                                                                  (max./min. values)

                EF3 - Filter/stop                                                            EF3: Off
                To ensure that the filters are changed when the filter change alarm          (On/Off)
                is active, the set point can be set to ON. The system will then stop
                automatically after 14 days if the filters have not been changed in
                the meantime.
                If this precaution is not required, the set point can be set to OFF and the
                system will continue to operate.

EG - Humidity   EG1 - Humidity max temperature                                               EG1: 15 °C
control         Setting the end point for outside temperature compensation (T3), see         (0-25 °C)
                the X-axis on the graph.
EH – Heat pump
settings        EG2 - Humidity max value                                                     EG2: 60 %
                Setting the end point for outside temperature compensation, see the          (35-85 %)
                Y-axis on the graph (desired max. humidity value).

                EG3 - Humidity fan speed                                                     EG3: 15 %
                Setting of how much the fan speed may differ in relation to the desired      (5-30 %)
                fan speed.
                Examples
                Set point fan speed level 2 (EB2 / EB6) = ± 15%

                EG4 - Humidity regulation frequency                                          EG4: 10 min.
                Setting of desired frequency for how often the fan speed may be              (1-60 min.)
                changed.
                The function is defined as 1% per unit of time.                              EH1: Water
                When humidity regulation is activated, the current humidity is               (Water/Air)
                continuously measured via the integrated humidity sensor in the
                ventilation unit, which is placed in the extract air duct.

                EH1 – Priority water/air
                Choosing water will prioritize water heating first before switching to
                room heating and vice versa.

                EH2 – Release cooling                                                        EH2 : On
                Choosing on will enable the cooling icon on the display from where the       (On/Off)
                cooling can be activated. (green light in the cooling icon on the main
                screen means automatic activation of cooling enabled)
                Note: Choosing off will remove the cooling icon from the main menu.

                EH3 – Cooling activation                                                     EH3: 2 °C
                Additional offset to EE1 (bypass offset) from when active cooling will       (0-5 °C)
                start.

                e.g. requested room temperature 20 °C
                EE1 set to 20 + 3 °C the active cooling will turn on when the extract air
                temperature reaches 20 + 3 + 3 = 26 °C

                Please notice that the bypass damper will close when running active
                cooling to maximize efficiency.

16 		
Menu            Description                                                                 Factory setting and
                                                                                            (max./min. values)
EH – Heat pump
settings        EH4 – Min. outdoor cooling                                                  EH4: 15 °C

                To prevent the cooling function to activate at low fresh air temperatures (0-20 °C)

                and from blowing cold, unheated air into the dwelling, use this function

                to configure the lowest fresh air temperature at which cooling may be

                enabled.

                EH5 – DHW element                                                           EH5: On
                Enable the DHW element icon on the main screen of the touch panel.          (On/Off)
                (green light in the DHW icon on the main screen means automatic
                activation of DHW element enabled).
                Note: Choosing off will remove the DHW icon from the main menu.

                EH6 – Legionella On/Off                                                     EH6: On
                Selecting on will enable automatic legionella protection which will heat    (On/Off)
                up the DHW cylinder to 65 °C once a week, according to the calendar
                EH7, EH8

                EH7 – Legionella start day                                                  EH7: Monday
                Choose day to start legionella disinfection                                 (Monday-Sunday)

                EH8 – Legionella start hour                                                 EH8: 01
                Choose hour to start legionella disinfection                                (00-23)

                EH9 – stop defrost temp                                                     EH9: 10 °C
                The defrosting period ends by default when the evaporator reaches a         (0-15 °C)
                temperature of 10 °C, which is the standard setting. Setting this value
                lower will reduce the deicing cycle but may lead to build-up of ice on the
                evaporator.

                EH10 – Balanced defrost                                                     EH10: off
                Choosing on will maintain the current fan speed on both supply and          (On/Off)
                extract air fans – but may lead to longer deicing periods. Choosing off
                will stop the supply air fan during the deicing cycle which will typically
                be the most efficient deicing strategy.

                EH11 – Constant On/Off                                                      EH11: off
                If the home's other heating systems are not connected to the heat           (On/Off)
                pump system, the home's other heating systems, e.g. a wood-burning
                stove, can stop the heat pump so that the heat pump system with heat
                exchanger only blows preheated air into all rooms. This may cause
                increasing problems with draught as the temperature drops outside.
                Setting EH11 will run the heat pump continuously independent of the
                extract air temperature.
                Choosing on, will switch off the heat pump when the desired room
                temperature has been reached.

                EH12 – Constant @ temp                                                      EH12: 5 °C
                If EH11 is set to on, set the outdoor air temperature here to when the      (0-10 °C)
                heat pump will need to run continuously to heat the supply air.

		17
Menu            Description                                                             Factory setting and
                                                                                        (max./min. values)
EH – Heat pump  EH13 – External override
settings        • Scheduler = the calendar programme will determine the operation of   EH13: Scheduler
                                                                                        (Scheduler/Solar
                  the Combi unit.                                                       panel/Smart grid)
                • Solar Panel = the solar panel input determines the operation of the

                  Combi unit.
                • Smart grid = the smart grid input determines the operation of the

                  Combi unit.

                See SG functions below

                OFF         The SG ready function can be activated by the
                            installer here. Three possible modes can be
                (SG BOOST)  selected. This function allows the start of the heat
                (SG ECO)    pump from an external access (terminal L9 on PCB).
                (SG BLOCK)  SG ready is not active if there is not external input
                            (SG1 OFF, SG2 OFF).

                            The heat pump and electric heater must start, if
                            below the max water temperature allowed in the
                            tank. Both Heat Pump end Electric heater are
                            forced to operate (SG1 ON and SG2 ON).

                            The heat pump operates minimizing costs, only the
                            heat pump is activated (SG1 OFF, SG2 ON).

                            The unit can be stopped even if there is a need for
                            hot water (SG1ON, SG2 OFF).

                EH14 – PV panel low set                                                 EH14: 1V
                Set voltage input from solar inverter where surplus electricity will    (0.1-10V)
                activate the heat pump to produce DHW to a higher temperature
                setpoint according to setpoint B6.

                EH15 – PV panel high set                                                EH15: 5 V
                Set voltage input from solar inverter where surplus electricity will    (1-10V)
                activate both the heat pump and immersion heater to produce DHW to a
                higher temperature setpoint according to B6.

                EH16 – PV panel delay                                                   EH16: 15 min.
                Time delay before switching between operating modes when signal         (0-60 min.)
                from solar inverter fades/increases above threshold value.

                EH17 – Compressor hysteresis                                            EH17: 0.4 °C
                The default temperature difference between start/stop compressor        (0,1–1,0 °C)
                is ± 0.4 °C. Changing the temperature difference is recommended only
                under special operating conditions

                EH18 – Compressor mode                                                  EH18: Auto
                Choose Auto to let the Combi automatically switch on/off the heat       (Auto/Off)
                pump. Choose off to enable ventilation and DHW production with
                immersion heater (e.g. when compressor is damaged and awaits service).

18 		
Menu            Description                                                                    Factory setting and
EH – Heat pump                                                                                 (max./min. values)
settings
                EH19 – Regulation sensor (zone 1)                                              EH19: T2
EI - Demand     Select the temperature sensor controlling the main heat pump operation         (T2/CO2 sensor 1-5/
control         and climate control. Factory setting is the built in T2 temperature sensor in  MB1-MB3/T9)
                the extract air duct.

                CO2 1-5 are optional Modbus/Wireless sensors containing also a
                temperaturesensor. MB1-MB3 are sensors connected to the Multibox for
                zone 1,2 and 3. T9 is the free optional temperature sensor input on the
                main PCB.

                EH20 - Temperature min.                                                        EH20: 10 °C

                Limitation for lowest allowed temperature setting in the temperature setting (10-20 °C)

                menu on main screen.

                EH21 - temperature limit max.                                                  EH21: 30 °C
                Limitation for highest allowed temperature setting in the temperature          (20-30 °C)
                setting menu on main screen.

                EH22 - Domestic hot water hysteresis                                           EH22: 5 °C
                Adjustable hystereses for activation of heat pump                              (1-20 °C)

                for example
                EH22 = 5 °C
                Setpoint DHW = 50

                Heat pump will start heating hot water when temperature in tank reaches
                50-5 = 45 °C

                Heat pump will stop heating hot water when reaching setpoint temperature       EI1: Off
                50 °C.                                                                         (On/Off)

                EI1 - CO2 control
                On = activates external sensors for demand control (if available)
                Off = no external sensors for demand control available

                EI2 - CO2 setpoint                                                             EI2: 800 PPM
                Setpoint for desired CO2 level in PPM.                                         (400-2000 PPM)
                If CO2 level increase above setpoint, the fans will increase speed in steps
                to maintain CO2 level at setpoint.

                EI3 - CO2 level time                                                           EI3: 30 min.
                Setpoint in minutes for time between increase/decrease fan speed               (0-1000 min.)
                in steps according to CO2 level (see setpoint EI2)

                EI4 - Number of RF CO2 sensors                                                 EI4: 0
                Select number of wireless CO2 sensors connected.                               (0-5)
                Make sure that the dip switches in the CO2 sensors are set correct
                according to separate documentation.

		19
Menu         Description                                                                    Factory setting and
                                                                                            (max./min. values)
EI - Demand  EI5 - Zone temperature control
control      If set to Zone 1 the temperature control see the entire house as one           EI5: Zone 1
             temperature zone and no relays for damper controls will be active.             (Zone 1/Zone 1+2/
                                                                                            Zone 1+2+3)

             If set to Zone 1+2 the temperature control will add one extra temperature
             zone to the controller which enables different temperatures for zone 1 and
             2. typically an air damper connected for zone 2 will switch between heating
             and cooling for zone 2. (see also EC06 / EC07).

             It will also be possible to control an external 230 volt heating source
             connected to a multibox independently of the damper controls (see EI9)

             If set to Zone 1+2+3 the temperature control will add two extra
             temperature zones to the controller which enables different temperatures
             for zone 1 , 2 and 3. typically an air damper connected for zone 2 and 3 will
             switch between heating and cooling for the zones. (see also EC06 / EC07).

             It will also be possible to control an external 230 volt heating source
             connected to a multibox independently of the damper controls (see EI9).

             Each Zone will have an individual adjustable requested room temperature
             setpoint.

             EI6: Zone temperature hysteresis                                               EI6: 0.4 °C
             Hysteresis for control of the temperature in the selected zone.                (0.1-2 °C)

             EI7: Zone 2 temperature sensor                                                 EI7: MB2
             Select which type of temperature sensor is active for zone 2.                  (CO2 sensor 1-5/
                                                                                            MB1-MB3/T9)
             The following options are available:
             Combined CO2 and temperature sensor (to be activated in EI4). Please be
             aware that the DIP switch setting in the sensor shall be identical to the
             value selected.

             If MB1-3 is selected ensure that the Multibox is activated in menu EI9.
             The Multibox contains temperature sensor inputs for three different wired
             temperature sensors. select the sensor input terminal which is used for
             zone 2.

             If T9 is selected the T9 temp sensor input on the main PCB is used to
             measure the temperature in Zone 2.

20 		
Menu               Description                                                                          Factory setting and
EI - Demand                                                                                             (max./min. values)
control            EI8: Zone 3 temperature sensor
                   Select which type of temperature sensor is active for zone 3.                        EI8: MB3
EJ - Fire control                                                                                       (CO2 sensor 1-5/
                   The following options are available:                                                 MB1-3/T9)
                   Combined CO2 and temperature sensor (to be activated in EI4). Please be
                   aware that the DIP switch setting in the sensor shall be identical to the
                   value selected.

                   If MB1-3 is selected ensure that the Multibox is activated in menu EI9.
                   The Multibox contains temperature sensor inputs for three different wired
                   temperature sensors. Select the sensor input terminal which is used for
                   zone 3.

                   If T9 is selected the T9 temp sensor input on the main PCB is used to
                   measure the temperature in Zone 3.

                   EI9: Enable Multibox                                                                 EI9: Off

                   If a Multibox is connected via the modbus communication system on the main (Off/On)

                   PCB, activate communication by selecting ON in the menu.

                   EI10: Heat pump temperature activation                                               EI10: Off
                   If set to off - the unit will heat using the compressor according to the             (Off/One of the
                   temperature selected in EH19                                                         zones/All zones)

                   If set to one of zones - the unit will heat using the compressor if there is a
                   heatdemand from any of the activated zones in EI5

                   If set to all of zones - the unit will only heat using the compressor if all of the
                   activated zones selected in EI5 has a heatdemand.

                   EJ1 - Number of fire dampers                                                         EJ1: 0
                   Setpoint for number for fire dampers connected to the system which need              (0-4)
                   to be monitored
                   0 = fire control system inactive
                   1-4 = number of dampers connected

                   EJ2 - Fire test/Reset                                                                EJ2: Off
                   Off = automatic mode, damper will be tested once a month according to                (Off/Test/Reset)
                   schedule
                   Test = test system now, with this function a function test of the fire damper
                   will be force started and the result shown in the display (N.B. there will be
                   a delay of up to 240 seconds from when the test is started until the test is
                   carried out).
                   Reset = reset fire alarm, in case of error during damper test, error in
                   damper/smoke detector or lack of communication, the ventilation unit will
                   shut down and an alarm symbol will be shown on the display.
                   To restart the unit, a reset of the fire automation must be carried out.

                   EJ3 - Fire test date                                                                 EJ3: 1
                   Schedule for when automatic monthly fire/smoke damper test shall be                  (1-31 day)
                   conducted

                   EJ4 - Fire test hour                                                                 EJ4: 12

                   Schedule for when automatic fire/smoke damper test shall be conducted. (0-23 hour)

		21
Menu               Description                                                              Factory setting and
                                                                                            (max./min. values)
EK - Mixing valve  PLEASE NOTE:
control            If no external outdoor air temperature sensor has been connected the
                   controller, the built in fresh air temperature sensor in the MVHR is
                   used as reference for calculating weathercompensation temperature
                   setpoints.

                   EK1 - Heating mode                                                       EK1: Off
                   Off = no external heating circuit connected                              (Off/Floor/Radiator)
                   Floor = underfloor heating circuit connected
                   Radiator = radiator heating circuit connected

                   EK2 - Outdoor temp. Comp. At -12 °C                                      EK2: 45 °C
                   Setpoint for flow temperature at -12 °C outdoor temperature              (20-90 °C)

                   EK3 - Outdoor temp comp at 20 °C                                         EK3: 20 °C
                   Setpoint for outdoor temperature when flow temperature is 20 °C An       (15-25 °C)
                   outdoor air temperature exceeding the setpoint in EK3 will close the
                   heating circuit (summer stop)

                   EK4 - Compensation curve offset                                          EK4: 2 °C
                   Setpoint in °C where heating curve compensation set in EK5 will have     -10 to +10 °C)
                   maximum influence

                   EK5 - Compensation curve                                                 EK5: 2 °C
                   Heating curve can be increased in steps of 0-5 °C with max influence     (0 - 5 °C)
                   according to value set in EK4

                   EK6 - Max flow temperature                                               EK6: 45 °C
                   Flow temperature will be limited to maximum 45 °C if underfloor          (20-65 °C)
                   heating is selected in EK1
                   Flow temperature will be limited to 90 °C if radiator heating is
                   selected in EK1

                   EK7 - Valve time (sec.)                                                  EK7: 150 sec.
                   Time for 3-point control valve from fully closed to fully open (depends  (1-255 sec.)
                   on actuator and valve stem configuration). Please refer
                   to valve supplier manual for this information.

                   EK8 - Max return temperature                                             EK8: 50°C
                   If max return temperature exceeds the temperature setpoint, then the     (25-70°C)
                   valve will close incrementally until the return temperature
                   setpoint is achieved.

                   EK9 - Neutral Zone                                                       EK9: 1°C
                   Hysteresis for temperature control via PID.                              (0-10°C)

22 		
Menu                Description                                                             Factory setting and
                                                                                            (max./min. values)
EK - Space heating  EK10 - Heating PI P                                                     EK10: 20
control             PI controller P-band                                                    (0-255)
                    By increasing this value the controller will try to reach the setpoint
                    temperature faster (with a risk of overshooting the setpoint)           EK11: 50
                                                                                            (0-255)
                    EK11 - Heating PI I (x10)
                    PI controller I-band                                                    EK12: 5 sec.
                    By increasing this value the controller will try to reduce              (1-120 sec.)
                    overshooting / offset of temperatures (with a risk of slowing the
                    controller down)                                                        EL1: 20
                                                                                            (1-247)
EL – Modbus         EK12 - Heating regulation time                                          EL2: 19200 baud
                    PI controller regulation time                                           (9600 baud/19200
                    By increasing this value the controller will be slowed down as time     baud)
                    between recalculation of valve position will be increased               EL3: Even
                                                                                            (None/Even/Odd)
                    EL1 - Modbus adress                                                     EL4: On
                    Modbus slave adress of unit                                             (On/Off)

                    EL2 - Modbus baud rate
                    choose either 9600 or 19200 baud depending on the application type

                    EL3 - Modbus Parity
                    choose odd or even depending on the application type

                    EL4 - Modbus Modify
                    choose off or on depending on the application type

EM - Manual         Enter password for entering relay test program (only for installers)
overridel           Enter password for entering OEM program (only for installers)

OEM

		23
7. FURTHER EXPLANATIONS OF HUMIDITY
AND DISTRICT HEATING CONTROL

7.1 Humidity control explanation                                                                                                   Example 1:
                                                                                                                                   At a fresh air temperature of 10°C the RH-
                      90                                                                                                           control aims for 55 % humidity measured
                                                                                                                                   in the extract air.
                      80                        EG1Setting range EG1
                                                                                                                                   Example 2:
                                                                   and EG2                                                         At a fresh air temperature of 20°C the
                                                                                                                                   RH-control aims for 60 % humidity
                      70                                                                                                           measured in the extract air.

                    EG2 60                                                                                                         EG1 and EG2 is used to change the
                                                                                                                                   characteristics of the humidity control
                             50                                                                                                    values by moving the compensation curve
RH %                                                                                                                               (indicated by the green line on the graph).
                                                                                                                              EG240

                      30

                      20

                      10

-15  -10        -5    0          0  5       10       15                     20  25        30

                                    Outdoor air temperature ᵒC EG1

Level 4 = 100%

Level 3 = 75%                          65%                                                                                         Example:
Level 2 = 50%                                                                                                                      Set point = ± 15% (EG3)
Level 1 = 30%                       ±15%        EG3                                                                                With a desired fan speed of 2 set to 50
                                                                                                                                   %, the fan speed will be able to fluctuate
                                       35%                                                                                         from 35 % to 65 % Humidity control
                                                                                                                                   is only available in fan speed 2 and will
                                                                                                                                   automatically be deactivated running in
                                                                                                                                   any other fan speed mode.

                                                                                                                                   Regulation of the fan speed takes place
                                                                                                                                   ±1% for every 10 min. (factory setting
                                                                                                                                   EG4).

7.2 Mixing valve control explanation                                EK5 set = 5°C                                                                  The district heating control system will
                                                                    EK5 set = 4°C                                                                  automatically adjust the flow temperature
             Setpoint, flow temp.                                   EK5 set = 3°C                                                                  of the heating system according to the
                                                                    EK5 set = 2°C                                                                  outdoor air temperature.
                  EK6 Max. flow temp.                               EK5 set = 1°C                                                                  The characterstic of the heating curve can
                             (45°C Floor)                           EK5 set = 0°C                                                                  be adjusted by EK2 and EK3

                  EK6 Max. flow temp.                                          20°C                                                                EK2 adjust the requested flow
                        (65°C Radiator)                                                                                                            temperature at outdoor air temperature
                                                                                     EK3                                                           -12 °C
                20°C
                                                                                                                                                   EK3 adjust the requested outdoor
                                    -12°C       2°C                                                                                                temperature when the flow temperature
                                                                                                                                                   is 20 °C

                                                                                                                                                   To increase heating capacity of the
                                                                                                                                                   heating system at a specific outdoor air
                                                                                                                                                   temperature. EK4 and EK5 can be used to
                                                                                                                                                   offset the heating curve characterstics

                                                                                                                                   Outdoor air temp.

                                    EC2         EK4

24 		
8. MAINTENANCE

8.1 Replacing Filters                                           8.2 Dismantling/taking the system out of service

When the filteralarm is displayed, the filters must be          Generally it is recommended to maintain a constant airflow
changed. Stop the system by the circuit breaker of the unit     through the ventilation unit at all times to prevent
or by the circuit breaker on the terminal board. Open the       condensation in the ductwork.
front cover/filter drawers and remove the filters. After        In case of the ventilation system not being used for weeks.
having changed the filters, reset the filter timer. The time    The following must be done: The power supply, i.e. the
interval for cleaning/ changing the filters can be adjusted in  power cables, must be disconnected. Disconnect the
the operating menu. Based on normal environmental               condensation outlet and power cables for any reheater/
conditions with clean air – a filter change is recommended      preheater. Disconnect cables for the control panel and
every 6 months for optimal working conditions.                  dismantle ducts. If the system should to be taken out of
Vacuum cleaning or using pressurised air on the filters is      service, the ducts must be dismantled to avoid condensed
not recommended.                                                water in the system and in the ducts. Close all supply air
Recommended filters to be used: Original Genvex filters in      and extract air valves.
quality Coarse / G4 = Standard filter (typically used on
extract air side) ; ePM10 / F5 = Fine filter ; ePM1 / F7 =
Pollen filter (typically used on fresh air side)

Please note that the following recommended annual
service of the ventilation unit internal components should
be done by an installer.

Condensation drain
When changing the filter in August/September before the
outside temperature falls to 5 °C, check that the
condensation drain is not blocked with dirt and make sure
that there is water in the water trap. Pour 1 litre of water
into the condensation tray and make sure it runs off freely.
If the condensation drain does not work, this could lead to
water damage in the home.

Heat exchanger
Inspect the heat exchanger every year. If it is dirty, remove
it and: - Alu-exchanger: Wash in lukewarm soapy water and
rinse using a hand shower if necessary. - Plastic exchanger:
No cleaning with solvents - use only clean water carefully
only careful dust removal from air intake surfaces with a
household vacuum cleaner.

Fans
Inspect the two fan wheels for dirt each year. If they are
dirty, they can be washed using a brush, bottle cleaner, etc.
Supply air and extract air valves: Clean the valves by wiping
with a dry cloth. Be careful that the valves do not turn, so
that the air volume changes.

		25
9. TROUBLESHOOTING

9.1Safety thermostat in electrical heater                    9.2 Error codes
    (optional equipment)
                                                              Error messages will be written in clear text on the Optima
If an error occurs on an electrical heater, the safety        Touch display.
thermostat will disconnect. The heater
is equipped with a fire thermostat that automatically cuts    In case of the error message "defrost alarm," it indicates
off the power supply, if the temperature exceeds 50 °C.       that the defrosting process is taking longer than expected.
If the temperature decreases, the heater automatically        Check the placement of temperature sensor T6 on the
re-engages. As an additional security there is a built-in     evaporator surface.
thermal cut-out, which disengages if the temperature
exceeds 100 °C. Re-engaging must be done manually. Does       In case of low pressure alarm the compressor will stop and
not apply to PTC electrical heaters.                          restart after 10 minutes. If low pressure alarm reoccur
                                                              within 24 hours the machine will stop and indicate the
The system is not running. Unit stopped                       alarm "low pressure transmitter". The same features apply
Possible error                                                for the high pressure switch
• Fuse in main board has blown, no power to unit.
• One of the fuses on the circuit board of the unit isblown.  If the zone control feature is active and the Combi unit will
• Loose wire, no power to unit.                               not be able to read a temperature from the zone control
• Loose wire between unit and control panel.                  sensor - an alarm will be displayed and the Combi will fall
• Faulty or incorrectly set week program.                     back to T2 temperature control. If the signal to the external
•	Filter timer has switched the system off. Condensed        sensor is restored that error will automatically be cleard
                                                              and the Combi will run according to the external sensor.
   water is leaking from the unit Possible error:
• Condensation outlet blocked by dirt.
•	The condensation outlet is not adequately protected

   against freezing at low outdoor temperatures.
•	If EB10 = on, check fans to ensure operation. If fans are

   expected to run and RPM feedback = 0 then ventilation
   unit will shut down and indicate alarm

No supply air
Possible error
• Faulty supply air fan
• Clogged supply air filter
•	Clogged fresh air grill due to dirt and leaves during the

   fall and snow and ice during the winter.
• Fuse on the circuit board is blown.
• The unit is in defrost mode (supply air fan stops)

No extract air
Possible error
• Faulty extract air fan
• Clogged extract air filter.
• Fuse on the circuit board is blown

Cold supply air
Possible error
• Clogged heat changer.
• Faulty extract air fan.
• Clogged extract air filter.
•	Electrical reheater is disconnected at the over heating

   thermostat (only units with electrical reheater
   installed).
•	Air in the heating pipes, faulty thermostat / motorvalve,
   incorrect setting of control panel.

26 		
Main menu                                             Optima 314  Possible settings
A – User                        Factory settings
A1 – Reheating                                                          On/Off
A2 – Humidity control                    On                             On/Off
A3 – DHW temperature                     On                             0-60 °C
A4 – DHW Element Temp                  52 °C                            0-65 °C
A5 – Boost time                        50 °C                          1-120 min.
A6 – Timer levels 3 and 4             30 min.                           On/Off
A7 – Timer levels 3 and 4                On                            1-9 hours
                                      2 hours
B - Schedulers
B1 – Fan Scheduler              Not used                                      Not used/level 1-4/standby
B2 – Temperature scheduler      Not used                             Not used/Alternative temp (B5)/Normal
B3 – DHW scheduler              Not used                          Not used/Alternative DHW temp (B6)/Normal
B4 – Enable scheduler
B5 – Alternative Temp.             Off                                             On/Off (B1-B2-B3)
B6 – Alternative DHW Temp         0,0 °C                                             -10 °C to +10 °C
                                 -10 °C                                              -50 °C to +50 °C
C – Date / Time
C1 – Time                          On                                            On/Off
C2 – Date
C3 – Daylight Saving Time       English                           English/Dansk/Deutsch/Dutch
                                10 min.                                        0-600 min.
D – Display                      5 sec.                                        0-120 sec.
D1 – Language                    0000                                         0000-9999
D2 – Screensaver time
D3 – Display Lock time          15%                                                              0-100%
D4 – Password                   30%                                                              0-100%
D5 – Firmware Update            45%                                                              0-100%
                                60%                                                              0-100%
EA - Save/Load Setting          15%                                                              0-100%
EA1 – Save settings             30%                                                              0-100%
EA2 – Load settings             45%                                                              0-100%
                                60%                                                              0-100%
EB – Fan level                   On                                                               On/Off
EB1 – Level 1 Supply air        50%                                                              0 - 100%
EB2 – Level 2 Supply air        50%                                                              0 - 100%
EB3 – Level 3 Supply air         On                                                               On/Off
EB4 – Level 4 Supply air
EB5 – Level 1 Extract air       Off                                                               On/Off
EB6 – Level 2 Extract air       Off                               Off/Fan speed 1/Fan speed 2/Fan speed 3/Fan speed 4
EB7 – Level 3 Extract air
EB8 – Level 4 Extract air
EB9 – Min. air volume mode
EB10 – Min. air volume extract
EB11 – Min. air volume supply
EB12 – RPM Alarm
EB13 – Reset RPM Alarm
EB14 - Balancing mode

		27
Main menu                                           Optima 314                   Possible settings
EC – Regulator                Factory settings
EC1 – Frost protection                                          Off/T3 Preheat/T5 Preheat/Fan Reduction
EC2 – Frost reduction            T3 preheat                                       -10 °C to +10 °C
EC3 – Release system stop             8 °C                                              On/Off
EC4 – Factory reset                   Off
EC5 – H3 relay options                Off                                Off/ Reset (%fans)/ Reset all
EC6 – AUX Relay H9                                                        Preheat/Reheat/Always on
EC7 – AUX Relay H10                Preheat
EC8 – Solar Hysteresis                  2                                                0-13
                                       12                                                0-13
ED – Electric heating                                                                   0-5 °C
ED1 – Regulation electricity          5 °C
ED2 – Preheating temperature
ED3 – Preheat PI P            3 min.                                1-30 min.
ED4 – Preheat PI I              3 °C                            -15 °C to +10 °C
ED5 – Preheat reg.
ED6 – Reheat offset              5                                    1-255
ED7 – Reheat PI P               200                                   1-255
ED8 – Reheat PI I             40 sec.                             10-120 sec.
ED9 – Reheat reg.              -2 °C                            -10 °C to +10 °C
                                                                      1-255
EE – Bypass                      5                                    1-255
EE1 – Bypass open offset        200                               10-120 sec.
EE2 – Turn off bypass         40 sec.
EE3 – Bypass Time min. on
                               3 °C                              1-10 °C
EF – Filter                    4 °C                              0-20 °C
EF1 – Reset filter timer      5 min.                            0-60 min.
EF2 – Filter timer
EF3 – Filter/stop              3 mth                              0-12 month
                                 Off                                  On/Off
EG – Humidity control
EG1 – Humidity max temp        15 °C                                 0-25 °C
EG2 – Humidity max value       60 %                                 35-85 %
EG3 – Humidity fan speed       15 %                                  5-30 %
EG4 – Humidity reg. Freq.     10 min.                               1-60 min.

EH – Combi Settings            Water                                Water/Air
EH1 – Priority water / air       On                                   On/Off
EH2 – Release cooling           2 °C                                  0-5 °C
EH3 – Cooling activation                                             0-20 °C
EH4 – Min. outdoor cooling     15 °C                                  On/Off
EH5 – DHW element                On                                   On/Off
EH6 – Legionella On/Off          On
EH7 – Legionella start day                                      Monday-Sunday
EH8 – Legionella start hour   Monday                                  00-23
EH9 – Stop defrost temp          01                                  0-15 °C

                               10 °C

28 		
Main menu                                             Optima 314             Possible settings
EH – Combi Settings                      Factory settings
EH10 – Balanced defrost                                                             On/Off
EH11 – Constant On/Off                           Off                                On/Off
EH12 – Constant @ temp                           Off                                0-10°C
EH13 – External override                         5°C              Scheduler/Solar Panel/Smart Grid
EH14 – PV panel low set                      Scheduler                             0.1-10V
EH15 – PV panel high set                          1V                                1-10V
EH16 – PV panel delay                             5V                              0-60 min.
EH17 – Compressor hysteresis                   15 min.                            0.1-1.0°C
EH18 – Compressor mode                          0.4°C                             Auto/Off
EH19 - Regulation sensor (zone 1)               Auto              T2/CO2 sensor 1-5/MB1-MB3/ T9
EH20 - Temperature min.                           T2                               10-20 °C
EH21 - Temperature limit max.                   10 °C                              20-30 °C
EH22 - Domestic hot water hysteresis            30 °C                               1-20 °C
                                                 5 °C
EI – Demand Control                                                                 On/Off
EI1 – CO2 control                                Off                          400 - 2000 PPM
EI2 – CO2 setpoint                           800 PPM
EI3 – CO2 level time                           30 min.                          0-1000 min.
EI4 – no. CO2 Sensors                                                                 0-5
EI5 – Zone temperature control                     0
EI6 – Zone temperature hysteresis              Zone 1               Zone 1/Zone 1+2/Zone 1+2+3
EI7 – Zone temperature sensor                   0.4 °C                             0.1-2 °C
EI8 - Zone 3 temperature sensor                  MB2
EI9 - Enable Multibox                            MB3                CO2 sensor 1-5/MB1-MB3/T9
EI10 - Heat pump temperature activation                              CO2 sensor 1-5/MB1-MB3/T9
                                                 Off
                                                 Off                                Off/On
                                                                    Off/One of the zones/All zones

		29
EJ – Fire Control                                    Optima 314            0-4
EJ1 – No. Of fire dampers                                          Off/Test/Reset
EJ2 – Fire test/reset                           0                1-31 day in month
EJ3 – Fire test date                          Off
EJ4 – Fire test hour                            1                      0-23 time
                                               12
EK – Mixing valve                                                Off/Floor/Radiator
EK1 – Heating mode                            Off                       20-90 °C
EK2 – Temperature compensation at -12°C      45 °C                      15-25 °C
EK3 – Temperature compensation at 20°C       20 °C
EK4 – Compensation curve offset               2 °C                 -10 °C to +10 °C
EK5 – Compensation curve                      2 °C                        0-5°C
EK6 – Max flow temp.                         45 °C
EK7 – Valve time                           150 sec.                     20-65 °C
EK8 – Max Return temperature                 50 °C                    1-255 sec.
EK9 – Neutral Zone                            1 °C                      25-70 °C
EK10 – Heating PI P
EK11 – Heating PI I (x10)                      20                       0-10 °C
EK12 – Heating regulation time                 50                        0-255
                                             5 sec.                      0-255
EL – Modbus                                                           1-120 sec.
EL1 – Modbus address                           20
EL2 – Modbus baud rate                   19200 baud                      1-247
EL3 – Modbus parity                                              9600/19200 baud
EL4 – Modbus modify                          Even
EM – Manually override                         On                  None/Even/Odd
OEM                                                                      On/Off

30 		
		31
THE AIR WE BREATHE                                   All
                                                  Genvex
    As of 1 January 2025, Genvex has           systems are
    merged with our parent company              rated with
    METRO THERM into one company under         energy label
    the name METRO THERM A/S.
                                                 A
    With the merger, both physical addres-
    ses will be retained: The head office and
    production for METRO THERM will
    remain in Helsinge, while administration
    and production for Genvex and KVM-
    Conheat will remain at the Haderslev
    address as a subdivision.

    The three strong brands – METRO
    THERM, Genvex and KVM-Conheat –
    remain unchanged and will continue to
    be treated as independent brands under
    METRO THERM A/S.

 Genvex – the original Danish ventilation system                          08:931-2609

 Genvex is a true Danish original. We started producing ventilation
 systems in 1978 and are still the front runners when it comes to
 development and production of the most innovative and durable ven-
 tilation systems on the market.

 Our units are installed in thousands of homes, providing clean, fresh
 air free from pollen, dust and harmful particles. They help lots of
 families with maintaining a healthy and comfortable indoor climate
 and prolong the longevity of the house itself. With very high heat
 recovery rates, a Genvex system lets you recover and reuse up to 95
 % of the heat inside your home. As a result, our units provide a
 strong contribution to energy savings in both in family homes and in
 society as a whole.

Please visit www.genvex.com to see a list of our distributors

METRO THERM A/S • Tel.: +45 48 77 00 00 • sos@genvex.dk • www.genvex.com
