Genvex OPTIMA 250 User manual

USER MANUAL
OPTIMA 250– Print ES960C
GES ENERGY 1, GES ENERGY S/M, ENERGY ECO 180,
GE ENERGY 1/2/3

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Table of contents
Page
1. Mounting Design................................................................ 3
2. Control panel....................................................................... 4
3. Installation............................................................................ 4
4. Start-up .................................................................................. 4
5. Operating .............................................................................. 5
5.1 Operating and changing data in the operating menu ............... 5
5.2 Main menu................................................................................ 6
5.3 Date and time ........................................................................... 6
5.4 Calendar................................................................................... 7
5.5 User menu................................................................................ 7
5.6 Display menu............................................................................ 8
5.7 Info menu................................................................................ 10
5.8 Service menu...........................................................................11
5.9 Schedule for week program.................................................... 14
5.10 Schedule for set points ........................................................ 15
6. Function............................................................................... 16
6.1 Controlling Optima 250........................................................... 16
6.2 Extra capacity......................................................................... 16
6.3 Operating reliability................................................................. 16
7. Maintenance....................................................................... 17
7.1 Unit ........................................................................................ 17
7.2 Alarms..................................................................................... 17
7.3 Dismantling/taking the system out of service ......................... 17
8. Troubleshooting............................................................... 18
8.1 Safety thermostat in electrical heater (optional equipment)........ 18
8.2 The system is not running .................................................... 18
8.3 Air faults.................................................................................. 18

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1. Mounting Design
1.1 Installation of the control panel
The control panel is designed to be mounted onto a at
wall.
1.2 Mounting
Find the location on the wall where you will x the control
panel and mark the screw-hole positions. A min. of four
screws must be used, the two bottommost and the two
topmost.
Mandatory Screw Mandatory Screw
Mandatory Screw Mandatory Screw
Screw
Screw
Hold the wall frame against the wall and mark the
screw-hole positions. Drilling of holes, hole size and the
corresponding screws for xing the panel depend on the
wall material.
Place the control panel in the xtures 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.
A
Support
Point
Support
Point
Support
Point
Support
Point
Underneath the control panel there is an access for the:
A: Terminal block. Connection to main circuit board
A low-current cable 4 x 0.25 mm2must be attached
between the unit and the control panel. 50 m is the
maximum cable length. The voltage drop for cable
lengths over 50 m is too high and can result in unreliable
operation.
How to mount the wall xture:
First screw the xture securely onto the at wall and pass
the cable up from below.
Connect the low-current cable to the terminal block. Check
that the cable is connected to the same numbers at both
ends. (Between the control panel and the main circuit
board in the unit.)
Next clip the control panel to the wall xture by guiding
it down from above, slightly slanting out at the bottom.
Finish by pressing in at the bottom so that it sits at
against the wall. For demounting: pull the control panel a
little out at the bottom and lift up.
Pos. Description
1 Panel housing
2 Front of panel
3 Pressure plate for display
4Wall xture
5 Glass for the display

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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 a󰀨ect 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 con-
trol panel you can bring up the menu for daily operating
options. (This function can be turned o󰀨:
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 func-
tion 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.
3. Installation
Please see the installation guide.
4. Start-up
The rst time the system is started, the control panel dis-
play 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 ver-
sion 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 250 UK
The display will then change to:
• The Genvex logo
• Optima 250 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 ows and the operational desires and demands
for the dwelling in question, e.g. weekly operation,
temperatures etc. to achieve the most e󰀨ective utilisation
and operation of the system.

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5. Operating
Optima 250
All Genvex ventilation units of the types GE Energy and
GES Energy for dwellings are delivered with the Optima
250 control, which has a factory setting so that the system
can be put into operation without further setting.
The factory setting is only a basic setting that should be
adapted to the operating desires and demands for the
dwelling in question to achieve the most e󰀨ective utilisa-
tion and operation of the system.
5.1 Operating and changing data in the
operating menu
Normally the symbols for daily operating options are
displayed and the following keys can be seen.
K1
K2
K4K3 K5
K6
K7
K1 - Speed
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 be-
tween the 4 speeds. The system can also be stopped by
holding down the key for 3-4 seconds on condition that
item 28 of the Service menu is set to ON.
K2 - Forced operation (Party mode)
Use this function/key to set the timer to party mode from
0 to 9 hours. If the number of hours is set to 0, speeds 3
and 4 will run until the speed is changed manually. If the
the number of hours is set between 1 and 9 hours, speeds
3 and 4 will automatically reconnect to speed 2 after the
number of hours congured.
K3 - After heating
Use this function to switch the after heating on and o󰀨. On
the key next to the symbol “After heating” you can change
between “+” and “÷”. If the symbol is set to “+” and the
system is equipped with an after heater the after heating
will commence as required. If the symbol is set to “÷”, the
after heating will not commence, even if required.
K4 - Main menu
Use this function to enter the main menu and access the
sub-items Date and time, Calendar, User menu, Display,
Info operation and Service menu.
K5 - Filter
Use this function to reset the lter alarm. The key next to
the “Filter” symbol resets the alarm for lter change. To
reset the lter alarm, change the lters and hold down the
key with the “Filter” symbol until the exclamation mark in
the symbol disappears.
K6 - Information
Use this function to get an overview of the current operat-
ing 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.
K7 - Temperature
Use this function to set the room temperature if the system is
equipped with an after heater and/or a bypass damper. Press
the key next to the “Temperature” symbol to enter the desired
temperature between 10 and 30 °C. The current temperature
will be displayed at the centre of the screen.
Press the key K4 to enter the main menu and sub-menus and
the following keys change function:
K3 changes to “Arrow down ” and when changing the
setting to “÷”.
K4 changes to “Enter”. Press “Enter” to proceed through
the menus and sub-menus.
K5 changes to “Arrow up” and when changing the setting
to “+”.
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, nish by
pressing “Enter”.

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5.2 Main menu
There is a “Book” symbol at the bottom centre of the
screen with the daily operating options. Press this key to
enter the main menu.
Date and time (item 4.3)
Calendar (item 4.4)
User menu (item 4.5)
Display (item 4.6)
Info operation (item 4.7)
Service menu (item 4.8)
“Arrow down” or “Arrow up” will change the symbol to a
horizontal arrow that shows the current location.
Press “Enter” to access the sub-items of the current menu.
Press “Arrow down” or “Arrow up” again to select the re-
quired sub-menu item. When the horizontal arrow is next
to a sub-menu item, the 2 lines will change place, the font
sizes will change and the text “Set” will be added. Press-
ing ”Enter” next to the selected sub-menu item will change
the background of the item to grey. Use the ”+” and ”÷”
keys to change the current value. Press “Enter” again to
save the change.
If no changes are required, press “Exit” to go back out of
the menus. Press “Help” to see a short guide to the menu
item. Press one of the keys to exit the help program.
After a short period of non-activity, the control will auto-
matically exit the programs.
5.3 Date and time
Use this function to set the date and time.
01 Hours
Enter the current hour here.
When changing between summer and winter time you
have to set the time one hour forward or back manually.
02 Minutes
Enter the current minute here.
03 Weekday
Enter the current weekday here.
04 Date
Enter the current date here.
05 Month
Enter the current month here.
06 Year
Enter the current year here.
Monday 1
Tuesday 2
Wednesday 3
Thursday 4
Friday 5
Saturday 6
Sunday 7
Weekday
January 1
February 2
March 3
April 4
May 5
June 6
July 7
August 8
September 9
October 10
November 11
December 12
Month

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5.4 Calendar
Use this function to congure the setting of each day of
the week. Each day can be congured to run with di󰀨erent
fan speeds as required. You can copy the conguration
from one day to another. You can choose ON or OFF here,
i.e. if for a period of time there is nobody home, the daily
settings can be turned o󰀨 and the system will run accord-
ing to a manual setting, e.g. level 1.
01 - Calendar
Choose between controlling the system manually or con-
trolling the speed (air exchange) and temperature auto-
matically according to a xed day program. If the menu
item is set to OFF, the system will be controlled manually
according to the speed and temperature selected.
If the menu item is set to ON, the system will be controlled
according to the day programs entered in the menu items
02 to 08.
Setting option: ON/OFF.
Factory setting: OFF.
02 - Monday
Up to 10 switching times can be entered for one day. The
times can be entered in random order. Enter the hours in the
rst column, the minutes in the second and the speed in the
third column. Use the fourth column to enter the temperature
di󰀨erence by which the temperature should be lowered.
Example: If the temperature is set to 21 °C and you enter
– 2.0 °C, the system will aim at 19 °C.
If the speed has been changed manually on the key under
daily operation, the program will return to the day program
when the next switching time is passed.
Examples of a day program:
01 07:30 H3 -0,0
02 09:15 H1 -1,0
03 17:00 H3 -0,0
04 18:00 H2 -0,0
05 23:30 H2 -2,0
It is not necessary to use all switching times. If the line is
marked by 0, it will be skipped by the control.
03 to 08
These days can be lled in individually in the same way as
under item 02.
09 Copy day
Use this menu item to copy one day to another, where the
same switching times, speeds and temperature lowering
are required.
For example: From Thursday to Tuesday.
5.5 User menu
01 - Temperature
Set the desired temperature between 10 and 30 °C.
In item 19 of the Service menu you can choose between
supply air regulation, room regulation or extract air regulation.
(The sensor is mounted in the control panel).
Setting option: between 10 and 30 °C.
Factory setting: 21 °C.
02 - Preheating
If a preheater is tted to the fresh air duct the set point must
be congured to ON. Enter the desired preheating tempera-
ture in item 20 of the Service menu. If instead a refrigerant
device is installed in the supply air duct the set point must be
congured to OFF. (It is not possible to control a preheater
and a refrigerant device at the same time). If both types of
optional equipment are installed, the set point must be con-
gured manually in spring and autumn. If none of the help
functions in item 27 of the Service menu are used, the help
function 4 can be used to control the additional cooling.
Setting option: ON/OFF.
Factory setting: OFF.
03 - After heating
If a after heater is tted to the system it is optional if the after
heater should operate. If the set point is congured to OFF
the after heater will not operate, even if required. Is the set
point congured to ON the after heater will engage as re-
quired. It regulates according to the temperature set in item
1 of the User menu.
Setting option: ON/OFF.
Factory setting: OFF.
04 - Timer levels 3 and 4
At speeds 3 and 4, the system will automatically reconnect
to speed 2 after the number of hours set in item 17 of the
Service menu by conguring the set point to ON. If the set
point is set to OFF, the system will run at speed 3 or 4 until
it is manually changed to another speed. The timer can
also be operated directly on the key next to the symbol for
“Party mode” on the screen for daily operating options.
Setting option: ON/OFF.
Factory setting: OFF.
05 - Change lter
A lter timer is built-in counting how long the system has
been running since the last change of lter. The set point
can be set between 1-6, which corresponds to 1-6 months.
It is recommended that the set point should initially be set
to 3, corresponding to 3 months.
If the lters are too dirty after the period congured, set
the set point to a lower number. If it is not necessary to
change the lters after the congured period, the set point
can be set to a larger number.
When the timer reaches the congured value for the
change of lter, the alarm “Change lter” will ash at the
top of the screen saver.

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When the lters have been changed, return to the screen
with daily operating options and hold down the key for the
“Filter” symbol until the exclamation mark disappears and
the system returns to normal operation.
Setting option: between 1 and 6 months.
Factory setting: 3 months.
06 - Humidity control
Here the humidity control is turned on, which must be set
to ON in order to be active.
Setting option: ON/OFF.
Factory setting: OFF.
5.6 Display menu
The menu item with the “Display” symbol.
Use this function to congure the following sub-menu
items:
01 - Language
Choose between several di󰀨erent languages in the dis-
play.
02 - Program info
This menu shows which Optima is tted on the system
and its version number:
Example: Optima 250 UK D: 3.1 C: 1.0
D represents the version number of the control panel.
C represents the version number of the main board.
03 - Screen saver.
The following settings can be selected here:
0: Screen saver o󰀨 (daily operating options are displayed)
1: Screen saver o󰀨, but with light dimming
2: Room temperature + light dimming
3: Clock + light dimming
4: Clock and room temperature + light dimming
5: Black screen + light dimming
Setting option: between 0 and 5.
Factory setting: 3.
04 - Pause time
Use this to set the period from no operation of the symbols
on the screen for daily operation until the screen auto-
matically returns to the screen saver. From daily menu
to screen saver variable from 1 to 10 minutes. The other
automatic return connections cannot be adjusted. If no
key has been pressed within the time intervals indicated
below, it will automatically return to the previous screen:
-Change in menu item back to menu item = 30 seconds
-From menu item to main menu = 2 minutes
-From menu item to daily menu = 2 minutes
Setting option: between 1 and 10 minutes.
Factory setting: 10 minutes.
05 - Auto wake-up
It is possible to deactivate the “Auto wake-up” function,
where you can change from the screen saver to the
screen with the symbols for the daily operating options by
moving your hand past the control panel.
If the function is set to OFF, press any key to display the
daily operating options.
Setting option: between 0 and 4.
Factory setting: 1.
”0” OFF
”1” Max sensitive
”2” Level 2
”3” Level 3
”4” Least sensitive
06 - Auto lightness
In the display there is a movement sensor.
Setting option: ON/OFF.
Factory setting: ON.
07 - Lightness day
Use this to enter the maximum brightness level for the
control panel when the room is fully lit.
Setting option: between 0 and 100 %.
Factory setting: 100 %.
08 - Lightness night
Use this to enter the minimum brightness level for the
control panel when the room is in complete darkness.
Setting option: between 0 and 100 %.
Factory setting: 30 %.
09 - Lightness day screen saver
Use this to enter the maximum brightness level for the
screen saver when the room is fully lit.
Setting option: between 0 and 100 %.
Factory setting: 50 %.
10 - Lightness night screen saver
Use this to enter the minimum brightness level for the
screensaver when the room is in complete darkness.
Setting option: between 0 and 100 %.
Factory setting: 0 %.
11 - Reset to factory settings
If the set points are congured so that the system does
not function as expected and the cause cannot be estab-
lished, there are 2 di󰀨erent options to reset the menu
items to the factory settings.
- Press 1 to change all menu items to the factory settings
except for the menu items for Speed (Level), Filter timer,
Calendar and Defrost temperatures.
- Press 2 to change all menu items to the factory settings.
Note: Before performing a reset, ensure that the currently
entered values are noted in the “Schedule for set points”.
Setting option: between 0 and 2.
Factory setting: 0 mode.

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12 - Safety menu
It is possible to prevent access to selected main menu
items so that they can only be changed with a password,
which is a 4-digit gure. The rst time, press 4 times 0 and
then “Enter”. Items 13 to 18 will open. Select the password
in item 18, which will also be the password to access the
menu items 13 to 18 in future.
13 - Date and time
If this item is set to ON, it will not be possible to enter the
menu for Date and time without using the selected pass-
word in item 18.
Setting option: ON/OFF.
Factory setting: OFF.
14 - Calendar
If this item is set to ON, it will not be possible to enter the
menu for Calendar without using the selected password in
item 18.
Setting option: ON/OFF.
Factory setting: OFF.
15 - User menu
If this item is set to ON, it will not be possible to enter the
User menu without using the selected password in item 18.
Setting option: ON/OFF.
Factory setting: OFF.
16 - Display
If this item is set to ON, it will not be possible to enter the
menu for Display without using the selected password in
item 18.
Setting option: ON/OFF.
Factory setting: OFF.
17 - Service menu
If this item is set to ON, it will not be possible to enter
the Service menu without using the selected password in
item 18.
Setting option: ON/OFF.
Factory setting: 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 pass-
word, 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.
5.7 Info operation
The Info operation menu provides an overview of the
current operating status of the system. If you want to see
the operating status of the system over a period of ope-
ration, connect the control panel to a computer and use
the Optima data logger program. The system monitors
the operating status every minute and stores the data for
up to one year on the SD card.
Current temperature
Press “Enter” next to the info operation menu. The rst
screen displayed shows the current temperatures.
T1 Supply air
T2 Room
T3 Fresh air
T4 Exhaust air
T7 Extract air
T8 Frost protection
T9 Extra sensor
Current fan speed
Press “Arrow down” to display the current percentage fan
speeds and the opening of the bypass damper and of the
water valve.
Supply air in %
Extract air in%
Bypass damper in %
Water valve in %
Bypass on/o󰀨
Current setting of operation relays
Press “Arrow down” again to display the current status of
the operation relays.
R2 After heating
R3 Preheating
R8 System in operation
R9 Help relay 9

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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 lter reaches the set
value, the alarm “Change lter” will ash at the top of the
screen saver.
The alarm will read OFF when the error has been cor-
rected or the lter is changed and reset.
Alarm Status Error at ”ON”
Control stopped ON/OFF Filter not changed after 14 days/ Frost protection
error/The system is equipped with an external
switch between terminals 28 and 29. “Alarm” will be
displayed when these are short-circuited and the
system has stopped.
Change lter ON/OFF The lters should be changed.
Frost protection ON/OFF The temperature of the water after heater is too low
(frost danger).
Com error ON/OFF The control panel cannot communicate with the main
board between display and printed circuit board).
Hour counters (2 pages)
Press “Arrow down” again to display the hour counters,
which count from the day the system is put into operation.
The gures shown should be multiplied by 10. This shows
how many hours the system has been running, how many
hours the system has run at the various speeds and how
many hours the relays have been connected (ON).
Total tid
Level 0
Level 1
Level 2
Level 3
Level 4
Relay 2 After heating
Relay 3 Preheating
Relay 8 System in operation
Relay 9 Help function
Press “Exit” to return to the main menu.
5.8 Service menu
Use this function to congure the following sub-menu items.
10 - Level 1 Supply air
Level 1, which is the lowest speed, is usually used when
there is nobody home. Both fans can be congured inde-
pendently of each other for all levels so that the air ow in
the supply air and in the extract air is equal, which pro-
vides optimal operation.
The adjustment of the system must be performed with
specialised air measurement equipment and can be per-
formed without the use of the main regulating damper.
It is not recommended to congure the air ows without
expert advice. Incorrect conguration can lead to major
energy consumption or unpleasant indoor climate.
Setting option: between 0 and 100 %.
Factory setting: 30 %.
11 - Level 2 Supply air
Level 2 is the recommended speed of the system in order
to provide the optimal indoor climate and it should be
adjusted to the ventilation requirement of the dwelling.
Setting option: between 0 and 100 %.
Factory setting: 50 %.
12 - Levels 3 and 4 Supply air
Level 3 is the highest speed that can be congured. It is
used e.g. if there are many guests or there is a lot of acti-
vity in the kitchen.
Setting option of level 3: between 0 and 100 %.
Factory setting of level 3: 75 %.
Level 4 is used mainly in summer to lower the indoor
temperature. Remember that a higher air exchange rate
increases the energy consumption.
Setting option of level 4: cannot be congured.
Factory setting: 100 %.
13 - Level 1 Extract air
The fan speed is adjusted until the same air ow is
achieved as the supply air on level 1.
Setting option: between 0 and 100 %.
Factory setting: 30 %.
14 - Level 2 Extract air
The fan speed is adjusted until the same air ow is
achieved as the supply air on level 2.
Setting option: between 0 and 100 %.
Factory setting: 50 %.
15 - Levels 3 and 4 Extract air
The air ow of level 3 is adjusted to the same air ow as
the supply air on levels 3 and 4 (item 12).
Setting option of level 3: between 0 and 100 %.
Factory setting of level 3: 75 %.
Setting option of level 4: cannot be congured.
Factory setting: 100 %.

11
16 - Fine tuning (T2)
It is possible to ne tune the room sensor of the control
panel so the correct current room temperature is displayed.
Setting option: between -5 and 0 °C.
Factory setting: -3 °C.
17 - Timer levels 3 and 4
If automatic reconnection is used for speeds 3 or 4, you
can enter how many hours the system should run on level
3 or 4 before it automatically returns to level 2. The set
point can be congured between 1 and 9 hours.
Setting option: between 1 and 9 hours.
Factory setting: 3 hours.
18 - Filter/stop
To ensure that the lters are changed when the alarm
“Change Filter” ashes on the screen of the control panel,
the set point can be congured to ON. The system will
then stop automatically after 14 days if the lters have not
been changed.
If this precaution is not required, the set point can be con-
gured to OFF and the system will continue to operate.
Setting option: ON/OFF.
Factory setting: OFF.
19 - Method of regulation
There are 3 options:
0. Room regulation (T2 sensor)
1. Supply air regulation (T1 sensor)
2. Extract air regulation (T7 sensor)
If the system is used in a dwelling, supply air regulation is
the normal choice. The set point is congured to 1.
For room regulation, congure the set point to 0.
For extract air regulation, congure the set point to 2.
Setting option: between 0 and 2.
Factory setting: 2.
20 - Preheating
If preheating is set to ON in item 2 of the User menu, the
set point must be congured to the fresh air temperature,
at which the preheating should connect.
Setting option: between -15 and 0 °C.
Factory setting: -3 °C.
21 - Bypass open
Here you set the temperature at which the bypass should
be 100 % open. You set a temperature di󰀨erential which
means that if you want the bypass to be 100 % open at
e.g. 23 °C and if the set temperature in User Menu item 1
is 20 °C, this menu item should be set to 3 °C.
The bypass will open, provided that:
1. The exhaust temperature is higher than the outdoor
air temperature.
2. The outdoor air temperature is above the set tempera-
ture in the Service Menu Item 29.
GE Energy 1/2/3 with modulating bypass: If the tempera-
ture rises 0.5 °C above the temperature set in User Menu
item 1, the bypass damper will begin to open. The bypass
is 100 % open when the temperature reaches the set point
in the User Menu Item 1 + the temperature di󰀨erential set
in this menu item.
To get a smooth opening of the bypass, the temperature
at which the bypass is fully open should be set appr. 3 ºC
above the set temperature in Use Menu item 1.
GES Energy S/M with ON/OFF bypass: The bypass opens
when the temperature reaches the set point in the User
Menu Item 1 + the temperature di󰀨erential set in this menu
item.
Setting option: between 1 and 10 °C.
Factory setting: 3 °C.
22 - Regulation water
If a water after heater with a motor-operated valve is
installed in the system it may be necessary to adjust the
regulation time.
The less regulation time, the faster the motor-operated
valve will regulate.
Setting option: between 1 and 250 seconds.
Factory setting: 20 seconds.
23 - Regulation electricity
If an electrical preheater or an electrical after heater is
installed, it may be necessary to adjust the regulation time.
Setting option: between 1 and 300 minutes.
Factory setting: 3 minutes.
24 - Frost reduction
To avoid icing of the counter current heat exchanger,
the supply air ow can be reduced gradually, when the
exhaust air temperature after the counter current heat
exchanger has fallen below the set temperature. This
function gradually reduces the supply air ow, until the set
value has been reached.
Caution: May cause negative pressure in the house!
Setting option: between 0 and 10 °C. The function is dis-
abled if set to 0 °C.
Factory setting: 0 °C.
25 - Frost protection
If a water after heater with motor-operated valve is instal-led
in the system, a frost protection sensor must be tted to the
water after heater and the set point congured to ON.
If no frost protection sensor is installed, the set point must
be congured to OFF.
Setting option: ON/OFF.
Factory setting: OFF.
26 - Frost protection temperature
If frost protection in item 25 is set to ON, the frost protec-
tion temperature must be congured to the temperature
where the system should stop and the motor-operated
valve open completely for the ow of hot water.
Setting option: between 0 and 10 °C.
Factory setting: 5 °C.

12
27 - Help funktion
This function can be used for the following:
Setpoint Function
0The relay is o󰀨.
1 The relay is on when the system is running. This can e.g. be used
to open and close the fresh air damper and the exhaust air damper.
2 The relay is on when extra heat is required or when the circulating
pump should run when heating with water after heating is required.
3The relay is on when the alarm “Change lter” is active. This can be
used to activate an external alarm.
4 The relay is on when extra cooling is required. This function is used
if a preheater is also tted to the system.
5The control can handle an earth heat exchanger by a damper.
The relay will be on for one of the following two conditions:
• The outdoor temperature, sensor T9, is lower than the value
congured in item 26 (frost protection temperature, typically
set at 5 °C).
• The outdoor temperature, sensor T9, is more than 1° above
the temperature congured in item 1 and 1 ° above the cur-
rent room temperature.
Setting option: between 0 and 5.
Factory setting: 0.
28 - System stop
Here you choose if it should be possible to stop the sys-
tem 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 o󰀨.
Setting option: ON/OFF
Factory setting: OFF.
29 - Turn o󰀨 bypass
To prevent the bypass damper from opening at low fresh
air temperatures and blow cold, not heated air into the
dwelling, use this function to congure the lowest fresh air
temperature, at which the damper must be closed. The
value is an expression of the greatest di󰀨erence that may
exist between the temperature congured 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 o󰀨.
Factory setting: 4 °C.
Please note: It is not recommended to congure the item
without expert advice.
30 - Modbus Mode *)
See separate description for MODBUS.
Setting option: 0-2.
0 = Modbus OFF
1 = 9600 Baud
2 = 19200 Baud
Factory setting: 0.
31 - Modbus adresse *)
See separate description for MODBUS.
Setting option: 1-247.
Factory setting: 1.
32 - Humidity max. temperature **)
Setting the end point for outside temperature-compensati-
on (T3), see the X-axis on the graph.
Setting option: 5-25 °C.
Factory setting: 15 °C.
33 - Humidity max. value **)
Setting the end point for outside temperature compensa-
tion, see the Y-axis on the graph (desired max. humidity
value).
Setting option: 35-85 %.
Factory setting: 60 %.
34 - Humidity fan speed **)
Setting of how much the fan speed may di󰀨er in relation to
the desired fan speed. See menu points 11, 12, 14 and 15.
Setting option: 5-30 %.
Factory setting: 15 %.
35 - Humidity regulating frequency **)
Setting of desired frequency for how often the fan speed
may be changed.
The device is dened as 1 % per unit of time.
Setting option: 1-60 min.
Factory setting: 10 min.
Menu point Fan speed 2 Fan speed 3
11 Supply air (50 %)
12 Supply air (75 %)
14 Extract air (50 %)
15 Extract air (75 %)
*) Only displays with integrated Modbus module
**) Only units with integrated humidity sensor
Sketch for humidity regulation
Desired RH set-point, see the graph below.
Variable fan speed on fresh air, see the graph below.
Sensor
location
Desired RH-set point,
see graph below.
Variable fan speed on fresh air
side, see graph below.
Extract air
Supply air
Exhaust air
Fresh air
T3

13
= Limits
= 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 %.
100%
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
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
S. 33
Fresh air temp. °C
RH
S. 32
Pre-
setting
Ex. 1 Ex. 2
Outside temperature compensation curve
Set point 34
Setting for how much the fan speed may di󰀨er in relation to the desired fan speed.
Example:
Set point 34 = ± 15%
With a desired fan speed of 3, the fan speed will be able to uctuate ± 15 %. Since fan speed 3 is set at 75% in
service menu 12 and 15, the fan speed must be max. 90% and min. 60%.
The same applies to fan speed 2. Since fan speed 2 is set at 50% in service menu 11 and 13, the fan speed must
be max. 65% and min. 35%.
Regulation of the fan speed takes place ±1% for every 10 min.
Setting option: see set point 35.
Fan speed
Level
4 = 100%
Level 3
= 75%
Level 2
= 50%
Level 1 = 30%
35%
65%
90%
60%
±15%
±15%
S.34
S.34

14
5.9 Schedule for week program
Red. T2 = Reduced room temperature
(Night set-back)
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Monday
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Thursday
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Sunday
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Tuesday
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Friday
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Wednesday
Hours Minutes Speed Red. T2
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Saturday

15
5.10 Schedule for set points
Item Headline Factory setting Conguration area Date Date Date Date
(4.5) 1 Temperature 21 °C 10 - 30 °C
2 Preheating OFF ON / OFF
3 After heating OFF ON / OFF
4 Timer levels 3 and 4 OFF ON / OFF
5 Change lter 3 months 1 - 6 months
6 Humidity control OFF ON / OFF
(4.8) 10 Level 1 Supply air 30 % 0 - 100 %
11 Level 2 Supply air 50 % 0 - 100 %
12 Level 3 and 4 Supply air 75 % 0 - 100 %
13 Level 1 Extract air 30 % 0 - 100 %
14 Level 2 Extract air 50 % 0 - 100 %
15 Level 3 and 4 Extract air 75 % 0 - 100 %
16 Fine tuning (T2) ÷ 3°C ÷ 5 - 0 °C
17 Timer level 3 and 4 3 hours 1 - 9 hours
18 Filter/stop OFF ON / OFF
19 Method of regulation 2 0 - 2
20 Preheating ÷ 3 °C ÷ 15 - 0 °C
21 By pass open 3 °C 1 – 10 °C
22 Regulation water 20 sec. 1 - 250 sec.
23 Regulation electricity 3 min. 1 - 30 min.
24 Frost reduction 0 °C 0 – 10 °C
25 Frost protection OFF ON / OFF
26 Frost protection temperature 5 °C 0 - 10 °C
27 Help functions 0 0 - 5
28 System stop OFF ON / OFF
29 Turn o󰀨 bypass 4 °C 0 - 20 °C
30 *) Modbus Mode 0 0 - 2
31 *) Modbus Address 1 1 - 247
32 **) Humidity max. temperature 15 °C 5 - 25 °C
33 **) Humidity max. value 60 % 35 - 85 %
34 **) Humidity fan speed 15 % 5 - 30 %
35 **) Humidity regulating frequency 10 mIn. 1 - 60 min.
*) Only displays with integrated Modbus module
**) Only units with integrated humidity sensor

16
6. Function
6.1 Controlling Optima 250
Regulation of room temperature
There are 3 methods of regulation – see service menu
item 19. If the supply air regulation has been selected, the
control will blow in air with the temperature set, provided
that an after heater is tted to the system. The supply air
temperature is regulated by the supply air sensor T1.
It is recommended to congure the supply air temperature
2-3 °C below the room temperature.
Relay R8
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
the fresh air damper or the exhaust air damper.
6.2 Extra capacity
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
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 tem-
perature set, the reheating will keep running. When the
temperature reaches the value set, the electrical reheater
will disconnect.
Bypass
GE Energy 1/2/3 w/ bypass: They are equipped with a
modulating bypass. If the room temperature increases to
0.5 °C above the set temperature, the bypass will begin to
open. The bypass is fully open when the temperature set
in the Service menu item 21 is reached, e.g. 5 °C above
the set / desired temperature.
GES Energy S / M w/ bypass: They are equipped with an
ON/OFF bypass. The bypass opens completely when the
temperature set in the Service menu item 21 is reached,
e.g. as 5 ° C above the set / desired temperature.
If the bypass function is set to ON, the bypass damper will
normally open, but if the outdoor temperature (T3) is 1 °C
higher than the extract air temperature (T7), the bypass
damper will close in order to utilise the “free” cooling of
the supply air that the counter current heat exchanger can
provide.
If an extra refrigerant device is tted to the system, this
will turn on when the bypass valve is open completely and
turn o󰀨 again when the bypass valve begins to turn o󰀨
again.
Systems with an electrical preheater will regulate in the
same way as an electrical after heater.
6.3 Operating reliability
Safety thermostat
If an error occurs on an electrical heater, the safety ther-
mostat will disconnect.
The heater is equipped with a re thermostat that automat-
ically cuts o󰀨 the power supply, if the temperature exceeds
80 °C. If the temperature decreases, the heater automati-
cally re-engages.
As an additional security there is a built-in thermal cut-out,
which disengages if the temperature exceeds 110 °C. Re-
engaging must be done manually.
Does not apply to PTC electrical heaters.
Remember to disconnect the power to the system
before performing an operation.

17
7. Maintenance
Follow the following instructions to achieve optimal
performance:
Before opening the unit, turn o󰀨 the power/
pull out the plug and wait until the fans have
stopped completely.
A couple of days after the primary installation, check that
the condensation outlet is working.
Environmental requirements
When repairing or dismantling the unit, statutory environ-
mental regulations must be observed regarding recycling
and destruction of various materials.
7.1 Unit
Filters
When the alarm “Change lter” ashes in the control panel
display, the lters must be changed. Stop the system by
the circuit breaker of the unit or by the circuit breaker on
the terminal board. Open the front cover/lter drawers and
remove the lters. After having changed the lters, reset
the lter timer. The time interval for cleaning/changing the
lters can be adjusted in the operating menu.
There is a danger of cuts from sharp discs.
The discs must not be damaged.
Vacuum cleaning or using pressurised air on
the lters is not recommended.
Filter performance may be impaired.
G4 = Standard lter (basic lter class G4)
F5 = Fein lter (ne lter class F5)
F7 = Pollen lter (ne lter class F7)
Condensation drain:
When changing the lter 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 o󰀨 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 uids (including
water); 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.
7.2 Alarms
Filter timer
The control has a lter timer to guarantee that the lter is
changed and that optimal operation is established. When
the timer reaches the set value, “Chg. lter” will ash in
the display until the lters have been changed.
When the lters have been changed, the button for the
lter symbol must be held down until ”Alarm!”, “Chg. Filter”
and the exclamation mark disappears and the unit reverts
to normal operation.
Com error
This error appears when there is no communication
between the display and control. Check that the wiring is
correct on terminals 21 to 24.
21 Signal
22 Signal
23 10 Volt
24 0 Volt
Frost protection error
This error message will be displayed if a water reheater
is tted to the system and the temperature of the water
reheater is too low, causing a danger of frost burst.
The control will stop the system and open the motor-
operated valve to keep the heater warm.
7.3 Dismantling/taking the system out
of service
The following must be done:
The power supply, i.e. the power cables, must be discon-
nected. Disconnect the condensation outlet and power
cables for any reheater/preheater. Disconnect cables for
the control panel and dismantle ducts.
If the system should to be taken out of service, the ducts
must be dismantled to avoid condensed water in the sys-
tem and in the ducts. Close all supply air and extract air
valves.

18
8. Troubleshooting
8.1 Safety thermostat in electrical
heater (optional equipment)
If an error occurs on an electrical heater, the safety ther-
mostat will disconnect.
The heater is equipped with a re thermostat that auto-
matically cuts o󰀨 the power supply, if the temperature
exceeds 80 °C. If the temperature decreases, the heater
automatically re-engages.
As an additional security there is a built-in thermal cut-out,
which disengages if the temperature exceeds 110 °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 is-
blown.
• 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 o󰀨.
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  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  lter.
• Fuse on the circuit board is blown
Cold supply air:
Possible error:
• Clogged heat changer.
• Faulty extract air fan.
• Clogged extract air lter.
• Electrical reheater is disconnected at the over heat-
ing thermostat (only units with electrical reheater
installed).
• Air in the heating pipes, faulty thermostat / motorvalve,
incorrect setting of control panel.
Within the guarantee period (0-2 years):
The installer from whom you have bought the system.
After the guarantee period (2 years ->):
The installer from whom you have bought the system or
the Genvex service department ([phone]).
Before calling, please write down the data from the inscrip-
tion plate (silver plate on the unit).

THE AIR WE BREATHE All
Genvex
systems are
rated with
energy label
A
The original Genvex units are
assembled by skilled and
experienced technicians and
have a lifetime that in many
cases is measured in decades.
The units are 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.
08:501-1811
Genvex –The original Danish Ventilation System
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.dk to see a list of our distributors