OPERATING
INSTRUCTIONS

               OPTIMA 251
TABLE OF CONTENT

1. Installation..............................................................................................................................................................................3
       1.1 Installation of the control panel.......................................................................................................................3
       1.2 Mounting...................................................................................................................................................................3

2. Control panel..........................................................................................................................................................................4

3. Installation..............................................................................................................................................................................5

4. Start-up...................................................................................................................................................................................6

5. Operating................................................................................................................................................................................7
       5.1 Operating and changing data in the operating menu................................................................................7
       5.2 Main menu................................................................................................................................................................8
       5.3 Date and time..........................................................................................................................................................8
       5.4 Calendar....................................................................................................................................................................8
       5.5 User menu.................................................................................................................................................................9
       5.6 Display menu........................................................................................................................................................10
       5.7 Info operation.......................................................................................................................................................11
       5.8 Service menu........................................................................................................................................................12
       5.9 Schedule for week program............................................................................................................................18
       5.10 Schedule for set points..................................................................................................................................19

6. Function................................................................................................................................................................................20
       6.1 Controlling Optima 251....................................................................................................................................20
       6.2 Extra capacity......................................................................................................................................................20
       6.3 Operating reliability...........................................................................................................................................20

7. Maintenance........................................................................................................................................................................21
       7.1 Unit...........................................................................................................................................................................21
       7.2 Alarms.....................................................................................................................................................................21
       7.3 Dismantling/taking the system out of service.. .......................................................................................21

8. Troubleshooting.................................................................................................................................................................22
       8.1 Safety thermostat in electrical heater (optional equipment)............................................................22
       8.2 The system is not running................................................................................................................................22
       8.3 Air faults................................................................................................................................................................22

2 		
INSTALLATION

1.1 Installation of the control panel                           A low-current cable 4 x 0.25 mm2 must be attached between
                                                                the unit and the control panel. 50 m is the maximum cable
The control panel is designed to be mounted onto a flat         length. The voltage drop for cable lengths over 50 m is too
wall.                                                           high and can result in unreliable operation.

1.2 Mounting                                                    How to mount the wall fixture:
                                                                1. First screw the fixture securely onto the flat wall and
Find the location on the wall where you will fix the control
panel and mark the screw-hole positions. A min. of four             pass the cable up from below.
screws must be used, the two bottommost and the two
topmost.                                                        2. Connect the low-current cable to the terminal block.
                                                                    Check that the cable is connected to the same numbers
Mandatory Screw  Mandatory Screw                                    at both ends. (Between the control panel and the main
                                                                    circuit board in the unit.)
         Screw      Screw
Mandatory Screw  Mandatory Screw                                3. Clip the control panel to the wall fixture by guiding it
                                                                    down from above, slightly slanting out at the bottom.
                                                                    Finish by pressing in at the bottom so that it sits flat
                                                                    against the wall. For demounting: pull the control panel a
                                                                    little out at the bottom and lift up.

Hold the wall frame against the wall and mark the screw-
hole positions. Drilling of holes, hole size and the
corresponding screws for fixing the panel depend on the
wall material.

Place the control panel in the fixtures and tilt it in against
the wall. The four support points in the corner of the display
must touch the wall to keep the display stable.

Support          Support                                        Pos.  Description
Point            Point                                          1     Panel housing
                                                                2     Front of panel
Support          Support                                        3     Pressure plate for display
Point            Point                                          4     Wall fixture
                                                                5     Glass for the display

                                    A

    Underneath the control panel there is an access for the:
    A: Terminal block. Connection to main circuit board

 		3
2. CONTROL PANEL

The control panel must be mounted on an interior wall that
is centrally located in the home.
Since the control panel at the same time functions as a
room thermostat, it is important to observe the following:

• Do not expose the control panel to direct sunlight
• Do not place the control panel on an outer wall
• Do not recess the control panel in the wall
• Do not place the control panel over a heat source

A lamp close to the control panel can affect the light
sensor so that the control panel will not regulate the light
intensity as intended.

On the front of the control panel in the ring there are 7
keys that are used to operate the panel. The function of
the keys changes depending on the menu selected.
(More information is available under Operation).

There is an infrared movement sensor located under the
glass screen. Simply by moving your hand past the control
panel you can bring up the menu for daily operating
options. (This function can be turned off:
See under Main menu/Display/Menu item 5).

The following are located at the bottom of the control
panel:

1: SD card
2: Room sensor
3: Light sensor
4: Mini USB port for connection to computer

1: The removable SD card contains all the control models
and versions that make the control panel compatible with
older versions. The SD card also contains all the langu-
ages, menus, help texts, symbols and collected data logs.
During the start-up procedure, the current versions are
installed in the control panel so that the control can
function without the SD card. However, the help texts will
not appear in the display and the data logs will not be
saved.

4: In order for a computer to read the data logs,
the Genvex data logger program must be installed.

4 		
  3. INSTALLATION

     Please see the installation guide.

 		5
4. START-UP

The first time the system is started, the control panel
display will show: “Choose language”.
Click “Next” to switch between available languages. Press
“Enter” when the desired language is shown in the display.
The control panel will now load the current program version
in the selected language.
The display will show:
• Updating model (loading the current model)
• Wait 1.5 minutes (It takes approximately 1.5 minutes to

  load the current version)
• Language load (91)
• Language OK
• Menu load (84)
• Menu OK
• Icon load (369)
• Menu OK
• Reset to default
• Restarting……..
• Optima 251 UK
The display will then change to:
• The Genvex logo
• Optima 251 UK
• Version number
D (Control panel): X.X
C (Main board): X.X
Finally, the display changes to daily operation and the
system is now in operation with the factory setting which is
only a basic setting.
The system is now ready to be adjusted with the most
optimal air flows and the operational desires and demands
for the dwelling in question, e.g. weekly operation,
temperatures etc. to achieve the most effective utilisation
and operation of the system.

6 		
5. OPERATING

Optima 251                                                   commence, even if required.K4 - Main menu
The Optima 251 display is preprogrammed with factory         Use this function to enter the main menu and access the
settings which is uploaded to the ventilation unit PCB       sub-items Date and time, Calendar, User menu, Display,
when starting up the ventilation unit for the first time.    Info operation and Service menu.
The factory setting is only a basic setting that should be
adapted to the operating desires and demands for the         K5 - Filter
dwelling in question to achieve the most effective           Use this function to reset the filter alarm. The key next to
utilisation and operation of the system.                     the “Filter” symbol resets the alarm for filter change. To
                                                             reset the filter alarm, change the filters and hold down the
5.1 Operating and changing data in the                       key with the “Filter” symbol until the exclamation mark in
operating menu                                               the symbol disappears.

Normally the symbols for daily operating options are         K6 - Information
displayed and the following keys can be seen.                Use this function to get an overview of the current
                                                             operating condition, e.g. temperatures, fan settings, relay
                                                             status/function ON/OFF, alarms, timers etc.
                                                             Use the key next to the symbol “Info” to read the operating
                                                             condition of the unit. More information can be found in the
                                                             main menu section under the item Info operation.

K1            K7                                             K7 - Temperature
                                                             Use this function to set the desired temperature if the
K2            K6                                             system is equipped with an reheater and/or a bypass
                                                             damper. Press the key next to the “Temperature” symbol
                        K3 K4 K5                             to enter the desired temperature between 10 and 30 °C.
                                                             The current temperature will be displayed at the centre of
K1 - Speed                                                   the screen.
Use this function to set the fan speed to levels 0-1-2-3-4.
Use the key next to the “Speed” symbol to change between     Press the key K4 to enter the main menu and sub-menus
the 4 speeds. The system can also be stopped by holding      and the following keys change function:
down the key for 3-4 seconds on condition that item 28 of
the Service menu is set to ON.                               K3 changes to “Arrow down ” and when changing the
                                                                   setting to “÷”.
K2 - Forced operation (Party mode)
Use this function/key to set the timer to party mode from    K4 changes to “Enter”. Press “Enter” to proceed through
0 to 9 hours. If the number of hours is set to 0, speeds 3         the menus and sub-menus.
and 4 will run until the speed is changed manually. If the
the number of hours is set between 1 and 9 hours, speeds     K5 changes to “Arrow up” and when changing the setting
3 and 4 will automatically reconnect to speed 2 after the          to “+”.
number of hours configured.
                                                             K6 changes to “Exit”. Press “Exit” to return to the 		
                                                                   previous screen.

                                                             K7 changes to “Help”. Press “Help” to see a short guide 		
                                                                   to the current menu item.

                                                             The horizontal arrow in the menu shows the current
                                                             location. To save changes to a menu item, finish by
                                                             pressing “Enter”.

K3 - Reheating
Use this function to switch the reheater on and off. On the
key next to the symbol “reheating” you can change between
“+” and “÷”. If the symbol is set to “+” and the system is
equipped with a reheater the heater will commence as
required. If the symbol is set to “÷”, the heater will not

 		7
5.2 Main menu                                                 03 - Weekday
                                                              Enter the current weekday here.
There is a “Book” symbol at the bottom centre of the
screen with the daily operating options. Press this key to    04 - Date
enter the main menu.                                          Enter the current date here.

Date and time (item 4.3)                                      05 - Month
                                                              Enter the current month here.
Calendar  (item 4.4)
                                                              06 - Year
                                                              Enter the current year here.

User menu (item 4.5)

Display   (item 4.6)                                          Weekday      Month

Info operation (item 4.7)                                     Monday    1  January             1

                                                              Tuesday   2  February            2

     Service menu (item 4.8)                                  Wednesday 3  March               3

“Arrow down” or “Arrow up” will change the symbol to a        Thursday 4   April               4
horizontal arrow that shows the current location.
                                                              Friday    5  May                 5

                                                              Saturday  6  June                6

                                                              Sunday    7  July                7

                                                                           August              8

                                                                           September 9

                                                                           October             10

                                                                           November 11

Press “Enter” to access the sub-items of the current menu.                 December 12
Press “Arrow down” or “Arrow up” again to select the
required sub-menu item. When the horizontal arrow is          5.4 Calendar
next to a sub-menu item, the 2 lines will change place, the
font sizes will change and the text “Set” will be added.      Use this function to configure the setting of each day of
Pressing ”Enter” next to the selected sub-menu item will      the week. Each day can be configured to run with different
change the background of the item to grey. Use the ”+” and    fan speeds as required. You can copy the configuration
”÷” keys to change the current value. Press “Enter” again to  from one day to another. You can choose ON or OFF here,
save the change.                                              i.e. if for a period of time there is nobody home, the daily
                                                              settings can be turned off and the system will run
If no changes are required, press “Exit” to go back out of    according to a manual setting, e.g. level 1.
the menus. Press “Help” to see a short guide to the menu
item. Press one of the keys to exit the help program.         01 - Calendar
After a short period of non-activity, the control will        Choose between controlling the system manually or
automatically exit the programs.                              controlling the speed (air exchange) and temperature
                                                              automatically according to a fixed day program. If the
5.3 Date and time                                             menu item is set to OFF, the system will be controlled
                                                              manually according to the speed and temperature
Use this function to set the date and time.                   selected.

01 - Hours                                                    If the menu item is set to ON, the system will be controlled
Enter the current hour here.                                  according to the day programs entered in the menu items
When changing between summer and winter time you have         02 to 08.
to set the time one hour forward or back manually.
                                                              Setting option: ON/OFF.
02 - Minutes
Enter the current minute here.

8 		
02 - Monday                                                     are used, the help function 4 can be used to control the
Up to 10 switching times can be entered for one day. The        additional cooling.
times can be entered in random order. Enter the hours in
the first column, the minutes in the second and the speed       Setting option: ON/OFF.
in the third column. Use the fourth column to enter the
temperature difference by which the temperature should          03 - Reheating
be lowered.                                                     If a reheater is fitted to the system it is optional if the
                                                                reheater should operate. If the set point is configured to
Example: If the temperature is set to 21 °C and you enter –     OFF the heater will not operate, even if required. Is the set
2.0 °C, the system will aim at 19 °C.                           point configured to ON the reheater will engage as
                                                                required. It regulates according to the temperature set in
If the speed has been changed manually on the key under         item 1 of the User menu.
daily operation, the program will return to the day program
when the next switching time is passed.                         Setting option: ON/OFF.

                    Examples of a day program:                  04 - Timer levels 3 and 4
                           01 07:30 H3 -0,0                     At speeds 3 and 4, the system will automatically reconnect
                           02 09:15 H1 -1,0                     to speed 2 after the number of hours set in item 17 of the
                           03 17:00 H3 -0,0                     Service menu by configuring the set point to ON. If the set
                           04 18:00 H2 -0,0                     point is set to OFF, the system will run at speed 3 or 4 until
                           05 23:30 H2 -2,0                     it is manually changed to another speed. The timer can also
                                                                be operated directly on the key next to the symbol for
It is not necessary to use all switching times. If the line is  “Party mode” on the screen for daily operating options.
marked by 0, it will be skipped by the control.
                                                                Setting option: ON/OFF.
03 to 08
These days can be filled in individually in the same way as     05 - Change filter
under item 02.                                                  A filter timer is built-in counting how long the system has
                                                                been running since the last change of filter. The set point
09 - Copy day                                                   can be set between 1-12, which corresponds to 12 months.
Use this menu item to copy one day to another, where the        It is recommended that the set point should initially be set
same switching times, speeds and temperature lowering           to 3, corresponding to 3 months (by entering 0 - the filter
are required.                                                   timer will be off and will not give a filterwarning).
For example: From Thursday to Tuesday.
                                                                If the filters are too dirty after the period configured, set
5.5 User menu                                                   the set point to a lower number. If it is not necessary to
                                                                change the filters after the configured period, the set
01 - Temperature                                                point can be set to a larger number.
Set the desired temperature between 10 and 30 °C.
In item 19 of the Service menu you can choose between           When the timer reaches the configured value for the
supply air regulation, room regulation or extract air           change of filter, the alarm “Change filter” will flash at the
regulation. (The sensor is mounted in the control panel).       top of the screen saver.

Setting option: between 10 and 30 °C.                           When the filters have been changed, return to the screen
                                                                with daily operating options and hold down the key for the
02 - Preheating                                                 “Filter” symbol until the exclamation mark disappears and
If a preheater is fitted to the fresh air duct the set point    the system returns to normal operation.
must be configured to ON. Enter the desired preheating
temperature in item 20 of the Service menu. If instead a        Setting option: between 1 and 12 months. setpoint = 0 will
refrigerant device is installed in the supply air duct the set  disable the filter timer (Be carefull when using this setting
point must be configured to OFF. (It is not possible to         – Genvex does not take any responsibility due to
control a preheater and a refrigerant device at the same        ventilation unit errors based on clogged filter)
time).
                                                                06 - Humidity control
If both types of optional equipment are installed, the set      Here the humidity control is turned on, which must be set
point must be configured manually in spring and autumn. If      to ON in order to be active.
none of the help functions in item 27 of the Service menu
                                                                Setting option: ON/OFF.

 		9
5.6 Display menu                                              ”0” OFF
                                                              ”1” Max sensitive
The menu item with the “Display” symbol.                      ”2” Level 2
Use this function to configure the following sub-menu         ”3” Level 3
items:                                                        ”4” Least sensitive

01 - Language                                                06 - Auto brightness
Choose between several different languages in the            In the display there is a movement sensor.
display.
                                                             Setting option: ON/OFF.
02 - Program info
This menu shows which Optima is fitted on the system and     07 - Brightness day
its version number.                                          Use this to enter the maximum brightness level for the
                                                             control panel when the room is fully lit.
Example: Optima 251 UK D: 3.1 C: 1.0
D represents the version number of the control panel.        Setting option: between 0 and 100 %.
C represents the version number of the main board.
                                                             08 - Brightness night
03 - Screen saver                                            Use this to enter the minimum brightness level for the
The following settings can be selected here:                 control panel when the room is in complete darkness.
0: Screen saver off (daily operating options are displayed)
1: Screen saver off, but with light dimming                  Setting option: between 0 and 100 %.
2: Room temperature + light dimming
3: Clock + light dimming                                     09 - Brightness day screen saver
4: Clock and room temperature + light dimming                Use this to enter the maximum brightness level for the
5: Black screen + light dimming                              screen saver when the room is fully lit.

Setting option: between 0 and 5.                             Setting option: between 0 and 100 %.

04 - Pause time                                              10 - Brightness night screen saver
Use this to set the period from no operation of the          Use this to enter the minimum brightness level for the
symbols on the screen for daily operation until the screen   screensaver when the room is in complete darkness.
automatically returns to the screen saver. From daily menu
to screen saver variable from 1 to 10 minutes. The other     Setting option: between 0 and 100 %.
automatic return connections cannot be adjusted. If no key
has been pressed within the time intervals indicated         11 - Reset to factory settings
below, it will automatically return to the previous screen:  If the set points are configured so that the system does
• Change in menu item back to menu item = 30 seconds         not function as expected and the cause cannot be estab-
• From menu item to main menu = 2 minutes                    lished, there are 2 different options to reset the menu
• From menu item to daily menu = 2 minutes                   items to the factory settings.

Setting option: between 1 and 10 minutes.                    • Press 1 to change all menu items to the factory settings
                                                                except for the menu items for Speed (Level), Filter
05 - Auto wake-up                                               timer, Calendar and Defrost temperatures.
It is possible to deactivate the “Auto wake-up” function,
where you can change from the screen saver to the screen     • Press 2 to change all menu items to the factory
with the symbols for the daily operating options by moving      settings.
your hand past the control panel.
                                                             Note: Before performing a reset, ensure that the currently
If the function is set to OFF, press any key to display the  entered values are noted in the “Schedule for set points”.
daily operating options.                                     Setting option: between 0 and 2.

Setting option: between 0 and 4.

10 		
12 - Safety menu                                                 5.7 Info operation
It is possible to prevent access to selected main menu
items so that they can only be changed with a password,          The Info operation menu provides an overview of the
which is a 4-digit figure. The first time, press 4 times 0 and   current operating status of the system. If you want to see
then “Enter”. Items 13 to 18 will open. Select the password      the operating status of the system over a period of ope-
in item 18, which will also be the password to access the        ration, connect the control panel to a computer and use
menu items 13 to 18 in future.                                   the Optima data logger program. The system monitors the
                                                                 operating status every minute and stores the data for up
13 - Date and time                                               to one year on the SD card.
If this item is set to ON, it will not be possible to enter the
menu for Date and time without using the selected                Current temperature
password in item 18.                                             Press “Enter” next to the info operation menu. The first
                                                                 screen displayed shows the current temperatures.
Setting option: ON/OFF.
                                                                  T1 Supply air
14 - Calendar                                                     T2 Room
If this item is set to ON, it will not be possible to enter the   T3 Fresh air
menu for Calendar without using the selected password in          T4 Exhaust air
item 18.                                                          T7 Extract air
                                                                  T8 Frost protection
Setting option: ON/OFF.                                           T9 Extra sensor

15 - User menu                                                   Current fan speed
If this item is set to ON, it will not be possible to enter the  Press “Arrow down” to display the current percentage fan
User menu without using the selected password in item            speeds and the opening of the bypass damper and of the
18.                                                              water valve.

Setting option: ON/OFF.                                          Supply air     in %
                                                                 Extract air    in%
16 - Display                                                     Bypass damper  in %
If this item is set to ON, it will not be possible to enter the  Water valve    in %
menu for Display without using the selected password in          Bypass         on/off
item 18.
                                                                 Current setting of operation relays
Setting option: ON/OFF.                                          Press “Arrow down” again to display the current status of
                                                                 the operation relays.
17 - Service menu
If this item is set to ON, it will not be possible to enter the   R2 Reheating
Service menu without using the selected password in item          R3 Preheating
18.                                                               R8 System in operation
                                                                  R9 Help relay 9
Setting option: ON/OFF.

18 - Password
Enter the selected password here and use this also in item
12 to enter items 13 to 18. If you forget your password,
contact Genvex Service department for assistance. To
change the password, enter a new password in this item
and press “Enter”. The password has now been changed.

                                                                 Current list of alarms
                                                                 Press “Arrow down” again to display the current alarms. An
                                                                 alarm it is activated if ON appears beside it. At ON there is
                                                                 an alarm, which can also be seen on the screen saver and
                                                                 the display for daily operating options. At the top it says
                                                                 alarm. The Info operation menu shows the type of alarm.
                                                                 When the timer for changing filter reaches the set value,
                                                                 the alarm “Change filter” will flash at the top of the screen
                                                                 saver.

 		11
The alarm will read OFF when the error has been corrected      The adjustment of the system must be performed with
or the filter is changed and reset.                            specialised air measurement equipment and can be
                                                               performed without the use of the main regulating damper.
Alarm       Status  Error at ”ON”                              It is not recommended to configure the air flows without
Control     ON/                                                expert advice. Incorrect configuration can lead to major
stopped     OFF     Filter not changed after 14 days/          energy consumption or unpleasant indoor climate.
                    Frost protection error/The system
Change      ON/     is equipped with an external switch        Setting option: between 0 and 100 %.
filter      OFF     between terminals 28 and 29.
Frost       ON/     “Alarm” will be displayed when             11 - Level 2 Supply air
protection  OFF     these are short-circuited and the          Level 2 is the recommended speed of the system in order
Com error   ON/     system has stopped.                        to provide the optimal indoor climate and it should be
            OFF                                                adjusted to the ventilation requirement of the dwelling.
                    The filters should be changed.
                                                               Setting option: between 0 and 100 %.
                    The temperature of the water after
                    heater is too low (frost danger).          12 - Levels 3 and 4 Supply air
                                                               Level 3 is the highest speed that can be configured. It is
                    The control panel cannot                   used e.g. if there are many guests or there is a lot of
                    communicate with the main board            activity in the kitchen.
                    between display and printed circuit
                    board).                                    Setting option of level 3: between 0 and 100 %.
                                                               Factory setting of level 3: 75 %.
Hour counters (2 pages)
Press “Arrow down” again to display the hour counters,         Level 4 is used mainly in summer to lower the indoor
which count from the day the system is put into operation.     temperature. Remember that a higher air exchange rate
The figures shown should be multiplied by 10. This shows       increases the energy consumption.
how many hours the system has been running, how many
hours the system has run at the various speeds and how         Setting option of level 4: cannot be configured.
many hours the relays have been connected (ON).
                                                               13 - Level 1 Extract air
 Total tid                                                     The fan speed is adjusted until the same air flow is
 Level 0                                                       achieved as the supply air on level 1.
 Level 1
 Level 2                                                       Setting option: between 0 and 100 %.
 Level 3
 Level 4                                                       14 - Level 2 Extract air
 Relay 2 Reheating                                             The fan speed is adjusted until the same air flow is
 Relay 3 Preheating                                            achieved as the supply air on level 2.
 Relay 8 System in operation
 Relay 9 Help function                                         Setting option: between 0 and 100 %.

Press “Exit” to return to the main menu.                       15 - Levels 3 and 4 Extract air
                                                               The air flow of level 3 is adjusted to the same air flow as
5.8 Service menu                                               the supply air on levels 3 and 4 (item 12).

Use this function to configure the following sub-menu          Setting option of level 3: between 0 and 100 %.
items.                                                         Factory setting of level 3: 75 %.

10 - Level 1 Supply air                                        Setting option of level 4: cannot be configured.
Level 1, which is the lowest speed, is usually used when
there is nobody home. Both fans can be configured              16 - Fine tuning (T2)
independently of each other for all levels so that the air     It is possible to fine tune the room sensor of the control
flow in the supply air and in the extract air is equal, which  panel so the correct current room temperature is
provides optimal operation.                                    displayed.

                                                               Setting option: between -5 and 0 °C.

12 		
17 - Timer levels 3 and 4                                      To get a smooth opening of the bypass, the temperature at
If automatic reconnection is used for speeds 3 or 4, you       which the bypass is fully open should be set appr. 3 ºC
can enter how many hours the system should run on level 3      above the set temperature in Use Menu item 1.
or 4 before it automatically returns to level 2. The set
point can be configured between 1 and 9 hours.                 Units with on/off bypass (e.g. ECO190 / ECO 375): The
                                                               bypass opens when the temperature reaches the set point
Setting option: between 1 and 9 hours.                         in the User Menu Item 1 + the temperature differential set
                                                               in this menu item.
18 - Filter/stop
To ensure that the filters are changed when the alarm          Setting option: between 1 and 10 °C.
“Change Filter” flashes on the screen of the control panel,
the set point can be configured to ON. The system will then    22 - Regulation water
stop automatically after 14 days if the filters have not       If a water reheater with a motor-operated valve is
been changed.                                                  installed in the system it may be necessary to adjust the
                                                               regulation time.
If this precaution is not required, the set point can be
configured to OFF and the system will continue to operate.     The less regulation time, the faster the motor-operated
                                                               valve will regulate.
Setting option: ON/OFF.
                                                               Setting option: between 1 and 250 seconds.
19 - Method of regulation
There are 3 options:                                           23 - Regulation electricity
0. Room regulation (T2 sensor)                                 If an electrical preheater or an electrical reheater is
1. Supply air regulation (T1 sensor)                           installed, it may be necessary to adjust the regulation
2. Extract air regulation (T7 sensor)                          time.

If the system is used in a dwelling, supply air regulation is  Setting option: between 1 and 30 minutes.
the normal choice. The set point is configured to 1.
For room regulation, configure the set point to 0.             24 - Frost reduction
For extract air regulation, configure the set point to 2.      To avoid icing of the counter current heat exchanger, the
                                                               supply air flow can be reduced gradually, when the exhaust
Setting option: between 0 and 2.                               air temperature after the counter current heat exchanger
                                                               has fallen below the set temperature. This function
20 - Preheating                                                gradually reduces the supply air flow, until the set value
If preheating is set to ON in item 2 of the User menu, the     has been reached.
set point must be configured to the fresh air temperature,
at which the preheating should connect.                        Caution: May cause under pressure in the house!
Setting option: between -15 and 0 °C.                          Setting option: between 0 and 10 °C. The function is
                                                               disabled if set to 0 °C.
21 - Bypass open
Here you set the temperature at which the bypass should        25 - Frost protection
be 100 % open. You set a temperature differential which        If a water reheater with motor-operated valve is instal-led
means that if you want the bypass to be 100 % open at e.g.     in the system, a frost protection sensor must be fitted to
23 °C and if the set temperature in User Menu item 1 is 20     the water reheater and the set point configured to ON.
°C, this menu item should be set to 3 °C.
                                                               If no frost protection sensor is installed, the set point
The bypass will open, provided that:                           must be configured to OFF.
1. The exhaust temperature is higher than the outdoor
                                                               Setting option: ON/OFF.
     air temperature.
2. The outdoor air temperature is above the set tempera-       26 - Frost protection temperature
                                                               If frost protection in item 25 is set to ON, the frost
     ture in the Service Menu Item 29.                         protection temperature must be configured to the
                                                               temperature where the system should stop and the motor-
Units with modulating bypass: If the temperature rises 0.5     operated valve open completely for the flow of hot water.
°C above the temperature set in User Menu item 1, the
bypass damper will begin to open. The bypass is 100 %          Setting option: between 0 and 10 °C.
open when the temperature reaches the set point in the
User Menu Item 1 + the temperature differential set in this
menu item.

 		13
27 - Help function                                             30 - Modbus Mode
This function can be used for the following:                   See separate description for MODBUS.
                                                               Setting option: 0-2.
Setpoint Function                                              0 = Modbus OFF
                                                               1 = 9600 Baud
0  The relay is off.                                           2 = 19200 Baud

1  The relay is on when the system is running. This            31 - Modbus Adress
                                                               See separate description for MODBUS.
   can e.g. be used to open and close the fresh air            Setting option: 1-247.

   damper and the exhaust air damper.                          32 - Humidity max. temperature
                                                               Setting the end point for outside temperature-
2  The relay is on when extra heat is required or              compensation (T3), see the X-axis on the graph.

   when the circulating pump should run when                   Setting option: 5-25 °C.

   heating with water reheating is required.                   33 - Humidity max. value
                                                               Setting the end point for outside temperature
3  The relay is on when the alarm “Change filter”              compensation, see the Y-axis on the graph (desired max.
                                                               humidity value).
   is active. This can be used to activate an exter-
                                                               Setting option: 35-85 %.
   nal alarm.
                                                               34 - Humidity fan speed
4  The relay is on when extra cooling is required.             Setting of how much the fan speed may differ in relation
                                                               to the desired fan speed. See menu points 11, 12, 14 and
   This function is used if a preheater is also fit-           15.

   ted to the system.                                          Setting option: 5-30 %.

5  The control can handle an earth heat exchanger              35 - Humidity regulating frequency
                                                               Setting of desired frequency for how often the fan speed
   by a damper.                                                may be changed.

   The relay will be on for one of the following               The function is defined as 1 % per unit of time.

   two conditions:                                             Setting option: 1-60 min.

   • The outdoor temperature, sensor T9, is                    Sketch for humidity regulation

   lower than the value configured in item 26                  Desired RH set-point, see the graph below.
                                                               Variable fan speed on fresh air, see the graph below.
   (frost protection temperature, typically

   set at 5 °C).

   • The outdoor temperature, sensor T9, is

   more than 1° above the temperature

   configured in item 1 and 1 ° above the

   current room temperature.

6  The relay is on when the terminal L1 (kitchen

   hood connection) has been activated/bridged.

   A damper can be connected to the relay H17

   which closes of the bathroom connection when

   activating the kitchen hood.

Setting option: between 0 and 6.

28 - System stop
Here you choose if it should be possible to stop the
system by pressing the key for speed (K1) in the operating
menu for 3-4 seconds. If the set point is OFF, the system
cannot be turned off.

Setting option: ON/OFF

29 - Turn off bypass                                           Extract air  Sensor    Fresh air
To prevent the bypass damper from opening at low fresh         Supply air   location  Exhaust air
air temperatures and blow cold, not heated air into the
dwelling, use this function to configure the lowest fresh air
temperature, at which the damper must be closed. The
value is an expression of the greatest difference that may
exist between the temperature configured in item 1 and
the lowest fresh air temperature.

Setting option: between 0 and 20 °C. If 0°C is selected, the
function is turned fully off.

14 		
Outside temperature compensation curve

                                                                                                              S. 32
RH

100%

95

90

85

80

75

70

65                                                          S.34
                                                                                                   S.3 4
60
                                                                                                                                   S. 33
55

50                                   Ex. 1                                                                                              Ex. 2
45

40

35

30

25    Pre-
20
15 setting

10

5

0 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

            = Limits                                                                                                                           Fresh air temp. °C

            = Factory setting

            = Examples

                               Example 1
                               At a fresh air temperature of 10°C the RH-value is 55 %.

                               Example 2
                               At a fresh air temperature of 20°C the RH-value is 60 %.

Set point 34                                                                                                                            The same applies to fan speed 2. Since fan speed 2 is set
Setting for how much the fan speed may differ in relation                                                                               at 50% in service menu 11 and 13, the fan speed must be
to the desired fan speed.                                                                                                               max. 65% and min. 35%.

Example:                                                                                                                                Regulation of the fan speed takes place ±1% for every 10
Set point 34 = ± 15%                                                                                                                    min.
With a desired fan speed of 3, the fan speed will be able to
fluctuate ± 15 %. Since fan speed 3 is set at 75% in                                                                                    Setting option: see set point 35.
service menu 12 and 15, the fan speed must be max. 90%
and min. 60%.

Fan speed                      65%                          90%
                               ±15%                         ±15%
    Level 4 = 100%             35%                           60%
    Level 3 = 75%

    Level 2 = 50%
     Level 1 = 30%

 		15
36 - Not applicable                                          43 - Reheat Reg
                                                             Reheat Cycle the function works the following way
37 - Preheat PI P                                            e.g. necessary output 50% and cycle = 60 sec means
P-band for the PI controller for the electrical modulating   controller will switch on preheater for 30 sec and off for
preheater.                                                   30 sec.

The P-band controls the amplification of the controller      Note: please refer to your country specifik regulations on
following a deviation from the setpoint (speeder)            limitations when adjusting this function.

38 - Preheat PI I                                            The modulating reheater function refers to the value
I-band for the PI controller for the electrical modulating   adjusted in setpoint no. 40.
preheater.
                                                             The reheater will try to maintain a steady supply air
The function controls how quickly the controller adapts      temperature according to this setpoint.
to a deviation of the setpoint (brake).
                                                             When using the modulating reheater - it will be necessary
39 - Preheat Reg                                             to replace the inlet air temperature sensor (T1) in the
Preheat Cycle the function works the following way           ventilation unit with a new temperature sensor installed
e.g. necessary output 50% and cycle =60 sec means            upstream of the reheater.
controller will switch on preheater for 30 sec and off for
30 sec.                                                      44 - Demand control
                                                             This function offers the opportunity for connecting
Note: please refer to your country specifik regulations on   external 0-10volt signals which can force control the fans
limitations when adjusting this function.                    up in speed by increasing the signal.

The modulating preheater function refers to the value        The function is only active in fan step 2 and 3 and requires
adjusted in setpoint no. 20.                                 that humidity control is deactivated (user menu 06).

The preheater will try to maintain a steady fresh air        The factory setting is 0%, which deactivates the demand
temperature according to this setpoint.                      control. The workspace for permitted increase of the fan
                                                             speed can be limited via settings from 0-100%.
When using the modulating preheater - the exsting fresh
air temperature sensor (T3) built into the ventilation unit  For example: workspace 100% here, 5 volts will increase
can be used as reference. No extra temperatur sensor is      the speed by +50%.
required.                                                    For example: workspace 50% here, 5 volts will increase
                                                             the speed by +25 %.
40 - Reheat offset
Offset for reheater with reference to the setpoint           45 - Fire damper*
requested temp on display (user menu 01)                     Should the Genvex Optima controls be used in a fire and
e.g. requested temp = 20 °C                                  smoke protection system, it is possible from this point on
offset value=2 reheater aims for 18 °C supply                the menu to select how many dampers are connected to
temperature                                                  the Optima controls and which must be monitored.

41 - Reheat PI P                                             Adjustment options
P-band for the PI controller for the electrical modulating   0 = the function is deactivated
reheater.                                                    1 =1 damper is connected
                                                             2 =2 dampers are connected
The P-band controls the amplification of the controller      3 =3 dampers are connected
following a deviation from the setpoint (speeder).           4 =4 dampers are connected

42 - Reheat PI I                                             When the function 1-4 is selected, the function will
I-band for the PI controller for the electrical modulating   continue to be active after you have pressed exit once.
reheater.                                                    After this, the menu points 46-48 will be displayed.

The function controls how quickly the controller adapts      46 - Fire test now*
to a deviation of the setpoint (brake).

16 		
     0 = auto, damper to be tested once a week according to
     schedule
     1 = fire test now, with this function a function test of the
     fire damper will be force started and the result shown in
     the display and logged on the SD card (N.B. there will be a
     delay of up to 240 seconds from when the test is started
     until the test is carried out).
     2 = 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.

     47 - Fire test day*
     Schedule for when automatic weekly fire/smoke damper
     test shall be conducted

     1 = Monday
     2 = Tuesday
     3 = Wednesday
     4 = Thursday
     5 = Friday
     6 = Saturday
     7 = Sunday

     48 - Fire test hour*
     Schedule for when automatic fire/smoke damper test shall
     be conducted

     Adjustment options: 1-24

     *N.B. – This function can only be used together with the
     ES960CC PCB and ES1048 firebox.

     By activation of menu 45, a point FireTST will be added
     under the info menu, which indicates the time of when the
     last fire test was carried out and the status of this test.

     Similarly, a point fire alarm will be shown which, if indicated
     as ON, will indicate errors on the damper and also identify
     which damper it is that is at fault. If the fire alarm is OFF
     after "fire test now pt 46" and correct selection of number
     of dampers, then the installation has been completed
     correctly.

 		17
5.9 Schedule for week program

                    Monday                                      Tuesday                                     Wednesday

             Hours  Minutes Speed  Red. T2               Hours  Minutes Speed  Red. T2               Hours  Minutes Speed  Red. T2

 1)                                          1)                                          1)
 2)                                          2)                                          2)
 3)                                          3)                                          3)
 4)                                          4)                                          4)
 5)                                          5)                                          5)
 6)                                          6)                                          6)
 7)                                          7)                                          7)
 8)                                          8)                                          8)
 9)                                          9)                                          9)
10)                                         10)                                         10)

             Hours  Thursday       Red. T2               Hours   Friday        Red. T2               Hours  Saturday       Red. T2

 1)                 Minutes Speed            1)                 Minutes Speed            1)                 Minutes Speed
 2)                                          2)                                          2)
 3)                                          3)                                          3)
 4)                                          4)                                          4)
 5)                                          5)                                          5)
 6)                                          6)                                          6)
 7)                                          7)                                          7)
 8)                                          8)                                          8)
 9)                                          9)                                          9)
10)                                         10)                                         10)

             Hours   Sunday        Red. T2

 1)                 Minutes Speed
 2)
 3)
 4)
 5)
 6)
 7)
 8)
 9)
10)

Red. T2 = Reduced room temperature
(Night set-back)

18 		
5.10 Schedule for set points                Factory setting Configuration area Date  Date  Date  Da

       Item Headline                        21 °C     10 - 30 °C
  (5.5) 01 Temperature
                                            OFF       ON / OFF
          02 Preheating
          03 Reheating                      OFF       ON / OFF
          04 Timer levels 3 and 4
          05 Change filter                  OFF       ON / OFF
          06 Humidity control
   (5.8) 10 Level 1 Supply air              3 months  1 - 12 months
          11 Level 2 Supply air
          12 Level 3 and 4 Supply air       OFF       ON / OFF
          13 Level 1 Extract air
          14 Level 2 Extract air            30 %      0 - 100 %
          15 Level 3 and 4 Extract air
          16 Fine tuning (T2)               50 %      0 - 100 %
          17 Timer level 3 and 4
          18 Filter/stop                    75 %      0 - 100 %
          19 Method of regulation
          20 Preheating                     30 %      0 - 100 %
          21 By pass open
          22 Regulation water               50 %      0 - 100 %
          23 Regulation electricity
          24 Frost reduction                75 %      0 - 100 %
          25 Frost protection
          26 Frost protection temperature   ÷ 3°C     ÷ 5 - 0 °C
          27 Help functions
          28 System stop                    3 hours   1 - 9 hours
          29 Turn off bypass
          30 Modbus Mode                    OFF       ON / OFF
          31 Modbus Address
          32 Humidity max. temperature      2         0-2
          33 Humidity max. value
          34 Humidity fan speed             ÷ 3 °C    ÷ 15 - 0 °C
          35 Humidity regulating frequency
          36 Not applicable                 3 °C      1 – 10 °C
          37 Preheat PI P
          38 Preheat PI I                   20 sec.   1 - 250 sec.
          39 Preheat Reg
          40 Reheat offset                  3 min.    1 - 30 min.
          41 Reheat PI P
          42 Reheat PI I                    0 °C      0 – 10 °C
          43 Reheat Reg
          44 Demand control                 OFF       ON / OFF
          45 Fire damper
          46 Fire test now                  5 °C      0 - 10 °C
          47 Fire test day
          48 Fire test hour                 0         0-5

                                            OFF       ON / OFF

                                            4 °C      0 - 20 °C

                                            0         0-2

                                            1         1 - 247

                                            15 °C     5 - 25 °C

                                            60 %      35 - 85 %

                                            15 %      5 - 30 %

                                            10 mIn.   1 - 60 min.

                                            5         1-255

                                            200       1-255

                                            40        10-120

                                            2         0-20

                                            5         1-255

                                            200       1-255

                                            40        10-120

                                            0         0-100 %

                                            0         0-4

                                            0         0-2

                                            3         1-24

                                            12        1-24

 		19
6. FUNCTION

6.1 Controlling Optima 251                                     6.3 Operating reliability

Regulation of room temperature                                 Safety thermostat
There are 3 methods of regulation – see service menu item      If an error occurs on an electrical heater, the safety
19. If the supply air regulation has been selected, the        thermostat will disconnect.
controller will blow in air with the temperature set,
provided that a reheater is fitted to the system. The          The heater is equipped with a fire thermostat that
supply air temperature is regulated by the supply air          automatically cuts off the power supply, if the
sensor T1.                                                     temperature exceeds 80 °C. If the temperature decreases,
                                                               the heater automatically re-engages.
It is recommended to configure the supply air temperature
2-3 °C below the room temperature.                             As an additional security there is a built-in thermal cut-
                                                               out, which disengages if the temperature exceeds 110 °C.
Relay R8                                                       Re-engaging must be done manually.
When the system is running at levels 1, 2, 3 or 4, the relay
will be turned on. This function can be used to e.g. control   Does not apply to PTC electrical heaters.
the fresh air damper or the exhaust air damper.
                                                               Remember to disconnect the power to the system before
6.2 Extra capacity                                             performing any service on the ventilation system.

Water reheating
For systems with water reheaters the motor-operated
reheater will begin to regulate (PI regulation) when the
temperature has fallen 1 °C below the temperature set.

Electrical reheating on / off version
For systems with electrical reheaters the reheater will
connect when the temperature has fallen 1 °C below the
temperature set. If the regulation time is set to e.g. 3
minutes, the temperature sensor T1 will measure if the
temperature is now above or below the temperature set
after 3 minutes. If the temperature is still below the
temperature set, the reheating will keep running. When the
temperature reaches the value set, the electrical reheater
will disconnect.

Electrical reheater (modulating)
For systems with the modulating electrical reheater.
The electrical reheater will automatically adapt to changes
in airflow and temperatures - maintining a constant
temperature according to the requested setpoint.
The controller will be adjusting the electrical output of the
reheater automatically.

Extra cooling
If an extra cooling device is fitted to the system, this will
turn on when the bypass motor is open completely and
turn off again when the bypass motor begins to turn off
again.

Systems with an electrical preheater will regulate in the
same way as an electrical reheater.

20 		
7. MAINTENANCE

Follow the following instructions to achieve optimal           Fans:
performance:                                                   Inspect the two fan wheels for dirt each year. If they are
                                                               dirty, they can be washed using a brush, bottle cleaner, etc.
               Before opening the unit, turn off the power/
               pull out the plug and wait until the fans have  Supply air and extract air valves:
               stopped completely.                             Clean the valves by wiping with a dry cloth. Be careful that
                                                               the valves do not turn, so that the air volume changes.
A couple of days after the primary installation, check that
the condensation outlet is working.                            7.2 Alarms

Environmental requirements                                     Filter timer
When repairing or dismantling the unit, statutory              The control has a filter timer to guarantee that the filter is
environmental regulations must be observed regarding           changed and that optimal operation is established. When
recycling and destruction of various materials.                the timer reaches the set value, “Chg. filter” will flash in
                                                               the display until the filters have been changed.
7.1 Unit                                                       When the filters have been changed, the button for the
                                                               filter symbol must be held down until ”Alarm!”, “Chg. Filter”
Filters                                                        and the exclamation mark disappears and the unit reverts
When the alarm “Change filter” flashes in the control panel    to normal operation.
display, the filters must be changed. Stop the system by
the circuit breaker of the unit or by the circuit breaker on   Com error
the terminal board. Open the front cover/filter drawers        This error appears when there is no communication
and remove the filters. After having changed the filters,      between the display and control. Check that the wiring is
reset the filter timer. The time interval for cleaning/        correct on terminals 21 to 24.
changing the filters can be adjusted in the operating menu.
                                                                21 Signal
               There is a danger of cuts from sharp discs.      22 Signal
               The discs must not be damaged.                   23 10 Volt
               Vacuum cleaning or using pressurised air on      24 0 Volt
               the filters is not recommended.
               Filter performance may be impaired.             Frost protection error
                                                               This error message will be displayed if a water reheater is
                         G4 = Standard filter                  fitted to the system and the temperature of the water
                         F5 = Fine filter                      reheater is too low, causing a danger of frost burst.
                         F7 = Pollen filter                    The control will stop the system and open the motor-
                                                               operated valve to keep the heater warm.
Condensation drain:
When changing the filter in August/September before            7.3 Dismantling/taking the system out of
the outside temperature falls to 5 °C, check that the          service
condensation drain is not blocked with dirt and make sure
that there is water in the water trap. Pour 1 litre of water   The following must be done:
into the condensation tray and make sure it runs off freely.   The power supply, i.e. the power cables, must be
If the condensation drain does not work, this could lead to    disconnected. Disconnect the condensation outlet and
water damage in the home.                                      power cables for any reheater/preheater. Disconnect
                                                               cables for the control panel and dismantle ducts.
Heat exchanger:
Inspect the heat exchanger every year. If it is dirty, remove  If the system should to be taken out of service, the ducts
it and:                                                        must be dismantled to avoid condensed water in the
- Alu-exchanger: Wash in lukewarm soapy water and rinse        system and in the ducts. Close all supply air and extract air
 using a hand shower if necessary.                             valves.
- Plastic exchanger: No cleaning with solvents - use only
clean water carefully only careful dust removal from air
intake surfaces with a household vacuum cleaner.

 		21
8. TROUBLESHOOTING

8.1 Safety thermostat in electrical heater                      Cold supply air:
(optional equipment)                                            Possible error:
                                                                • Clogged heat changer.
If an error occurs on an electrical heater, the safety          • Faulty extract air fan.
thermostat will disconnect. The heater is equipped with         • Clogged extract air filter.
a fire thermostat that automatically cuts off the power         • Electrical reheater is disconnected at the over heating 		
supply, if the temperature exceeds 50 °C. If the
temperature decreases, the heater automatically                   t hermostat (only units with electrical reheater 		
re-engages.                                                       installed).
                                                                • Air in the heating pipes, faulty thermostat / motorvalve,
As an additional security there is a built-in thermal cut-out,    incorrect setting of control panel.
which disengages if the temperature exceeds 100 °C.
Re-engaging must be done manually.

Does not apply to PTC electrical heaters.

8.2 The system is not running

Unit stopped
Possible error:
• Fuse in main board has blown, no power to unit.
• One of the fuses on the circuit board of the unit isblown.
• Loose wire, no power to unit.
• Loose wire between unit and control panel.
• Faulty or incorrectly set week program.
• Filter timer has switched the system off.

Condensed 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.

8.3 Air faults

No supply air:
Possible error:
• Faulty supply air fan
• Clogged supply air fi lter
• 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)
• Incorrect value set in User menu item 2.

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

22 		
 		23
THE AIR WE BREATHE                               All
                                              Genvex
    The original Genvex units are          systems are
    assembled by skilled and                rated with
    experienced technicians and            energy label
    have a lifetime that in many cases is
    measured in decades. The units are       A
    approved by all applicable
    standards and are easy to operate
    and service. Last – but not least all
    Genvex systems are developed with
    focus on compact dimensions and
    ease of installation and can be
    integrated discreetly in all types of
    homes.

    We are part of the NIBE Group
    – a family of companies that
    specialize in supplying hot water,
    heating and home comfort to
    homeowners worldwide.

Genvex –The original Danish Ventilation System                                                                     08:120-2104

Genvex is a genuine Danish original. We invented the ventilation system
more than 40 years ago, and we are still ahead of the pack when it comes
to development and production of the strongest and most durable
ventilation system.

Our unit is working in thousands of homes providing fresh clean air – free
of pollen, dust and harmful particles. This helps to strengthen the health
of the house and to make the indoor environment healthy and
comfortable for lots of families. At the same time, our system is an
important element when it comes to saving energy in homes and in
society as a whole – in fact you can recover up to 95% of the heat energy
with a Genvex system.

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

KVM-Genvex A/S • Sverigesvej 6 • DK-6100 Haderslev • Tel.: +45 73 53 27 00 • salgogsupport@genvex.dk • genvex.com
