Genvex OPTIMA 270 User manual

OPERATING
INSTRUCTIONS
OPTIMA 270
THE AIR WE BREATHE

2
TABLE OF CONTENTS
1. Installation.............................................................................................................................................................................3
2. Programming the Optima 270 control unit ...............................................................................................................5
3. Displays...................................................................................................................................................................................6
4. Start.........................................................................................................................................................................................8
5. Control unit menu................................................................................................................................................................9
6. Control unit settings.......................................................................................................................................................10
7. Further explanations of humidity and district heating control ......................................................................21
8. Maintenance.......................................................................................................................................................................25
9. Troubleshooting................................................................................................................................................................26

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1. INSTALLATION OF OPTIMA BASIC
Important information
Safety information
This appliance can be used by children aged 8 and over and
by people with reduced physical, sensory or mental
capabilities or lack of experience and knowledge, as long as
they are supervised or have been instructed in the safe use
of the appliance and understand the hazards involved.
Children must not play with the appliance. Children must
not clean or maintain the appliance without supervision. We
reserve the right to make design or technical changes.
1.1 Installation
Installation of the control panel
The control panel is intended for installation on a flat wall.
1.2 Assembly
Find the place on the wall where you want to attach the
control panel and mark the location of the screw holes.
At least two screws must be used to secure the control
panel to the wall. The type of wall will determine the
method for drilling holes, the hole size and the correct
screws for fixing the panel.
When the control panel is securely mounted on the wall,
take the Optima Basic panel, which comes with a pre-
installed cable, and pass this cable through the opening in
the cabinet, as shown in the picture.
Secure the cable to the chassis with a cable tie as shown to
prevent the cable from being pulled out of the clamp in the
display.
Please note: If the pre-installed 1.8 metre Optima Basic
cable is not long enough, it is possible to replace this with a
4-core 0.25 mm2 twisted pair cable with a length of up to
50 metres.
Attach the control panel to the cabinet using four screws as
shown in the picture.
Complete the installation by carefully snapping the plastic
cover onto the cabinet as shown in the picture.
Please note: The control panel can installed flush with the
wall using an integrated Euronorm box.
To remove the control unit, click off the plastic cover and
remove the screws.
For further information about connecting the control panel
to the Optima 270, refer to the electrical diagram in the
installation manual.

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1.1 Installation
Installation of the control panel.
The control panel is intended to be mounted on a flat wall.
1.2 Assembly
Find the place on the wall where you want to attach the
control panel and mark the location of the screw holes. At
least four screws must be used to secure the bracket to the
wall. The type of wall will determine the method for drilling
holes, the hole size and the correct screws for fixing the
panel.
Once the bracket is securely mounted on the wall, take the
Optima Touch display, which comes with a pre-installed
cable, and carefully click the display onto the bracket. Make
sure the cable is carefully routed as shown in the picture
before installing the display.
Please note: If the pre-installed 1.8 metre cable is not long
enough, it is possible to replace this with a 4-core 0.25
mm2 twisted pair cable with a length of up to 50 metres.
To remove the display, gently press the plastic clip (locking
mechanism) as shown in the picture.
For further information about connecting the control panel
to the Optima 270, refer to the electrical diagram in the
installation manual.
1. INSTALLATION OF OPTIMA TOUCH

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2. PROGRAMMING THE OPTIMA 270
CONTROL UNIT
The control system is preset from the factory, which means
that the unit can be put into operation without changing the
operating settings. The factory setting is a basic setting
that can be adapted to the wishes and requirements
applicable to the home in question to ensure optimal
utilisation and operation of the system.
Depending on the product's configuration, it is possible to
connect Optima displays directly to the connector outside
the product (connector labelled "display") or directly on the
printed circuit board.
The I/O interface includes terminals for connecting both
Modbus Master (e.g. BMS/CTS systems) and Modbus Slave
devices (e.g. district heating, fire box PCB or CO2sensors).
To expose the clamps, carefully remove the dust shield
sticker.
2.1 System without display interface
2.1.1. Connect an Optima Touch display to the Optima 270
and adjust the settings as needed. Remove the Optima
Touch control panel when programming is complete. The
Genvex ventilation system will continue to operate
according to the new set parameters.
2.1.2 Use the Genvex PC tool to adjust the Optima 270
parameters. Connect a laptop to the IO interface via the
Optima Basic or Touch display and use the PC as an
interface for programming the Optima 270, or connect it
directly to the micro-USB connector on the Optima 270
circuit board.
Optima Basic and Touch displays can be retrofitted to this
type of installation if required.
2.2 Installation with Optima Basic display
See details under 1.0.
2.3 Installation with Optima Touch display
2.3.1. Connect an Optima Touch controller to the Optima
270 and adjust the settings as needed.
NOTE: The Optima 270 control unit parameters can be
saved on the Optima Touch for one ventilation system and
transferred to a similar system by using "EA1 Save" and
"EA2 load settings" to save and load the settings,
respectively.
The latest version of the Genvex Genlog software can be
ordered from Genvex by calling [phone].

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3. CONTROL PANEL
User interface Optima Basic
Button A:
• Press to activate/deactivate
post-heating surface (if
connected)
• Press and hold to enable/
disable humidity control
Button D:
• Press to increase the fan
speed to level
3 for 30 minutes (time can be
set in menu A3).
Button B:
• Press and hold for 5 seconds
to reset filter timer
• Press and hold for 10
seconds to clear any errors
and reboot the system
Button C:
• Press to change the fan
speed
• If the LED lights are off, the
fans are off
*Micro USB interface for
programming Optima 270
parameters via PC.
Indicators, LED lights
• When the LED light is on, the function is activated/on
• When the LED light is off, the function is disabled/off
• Flashing LED lights indicate that the function is active
For more information on red LED alarm codes, refer
to Troubleshooting in Section 6.

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User interface Optima Touch – main display
Press to change fan speed
The actual speed will be displayed by coloured
blades indicating fan levels 1–4
Standby is only displayed when the EF9 menu is set
to ON. Please note that there will be a delay of 3–4
minutes before the fans turn off.
Press to change the room
temperature set point
(affects the opening of
summer bypass for room
cooling, etc.)
Tap to access status
information, alerts and
event log menu
Information bar
showing date and
time. Any errors will
be displayed here
Press to go back to
the previous menu
Boost function: Press to
increase the fan speed to level
3 for 30 minutes (time can be
set in menu A3).
Press to lock the display for 5
seconds (time can be changed in
menu D).
The external surfaces can be
wiped gently with a cloth
soaked in 70% isopropyl
alcohol.
Press to access the user and
service menu
At the bottom of the display:
*Micro USB interface for programming the Optima 270
control unit's parameters via PC.
*micro SD card: card reader for firmware update of
controller and display

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4. START
4.2 Optima Touch user interface – screen saver
Depends on the screen saver settings in D – Display menu.
The display will revert to the screen saver after 2 minutes.
If D2 is set to 0, the screen saver will be permanently
active. If a time is set in D2, the screen saver will change to
a blank display after the set time.
To access the main menu again, gently press the display for
2 seconds until the display reactivates.
4.1 Optima Touch user interface – first use
The following information will be displayed during the
initial startup of the control unit for the Optima 270
ventilation, where the Optima Touch is connected to the
control unit.
Wait approximately 1 minute for the initial boot sequence
to complete.
Controller software version: the actual software version of
the Optima 270 controller.
Software version, display: the actual software version of
the display.
Device-ID: ID of the controller's secure communication
protocol for Internet connection.
IP address: Only displayed if the ventilation unit is
connected to a router via RJ45 connection.
Internet connection status: Indicates whether the Internet
connection is connected or disconnected. If the status
indicates “disconnected”, no connection can be made via the
Genvex Connect app or remote monitoring/remote
servicing.
Current indoor and outdoor
temperature. Based on local
measurements in the
ventilation unit (outdoor air
and exhaust air).
Current time
and date
Screen saver

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5.1 Structure, user and service menu in Optima
Touch
The structure of the user and service menu in the Optima
Touch display is divided into the following sections:
A – User: main user settings
B – Calendar: calendar schedules for changing fan speeds
and temperature settings
C – Date/Time: date and time settings on info display and
for time stamping events in the log
D – Display: settings for display and access to parameters
E – Service: service menu – please note that this menu
should primarily be used by technicians familiar with the
operation of the machine.
5. CONTROL UNIT MENU

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6. CONTROL UNIT SETTINGS
Menu Description Factory setting (max./
min. values)
A1 – Post-heating If a post-heating surface is fitted in the system, you can choose
whether the heater should be activated. If the setting is set to OFF, the
heater will not turn on even when required. If the setting is set to ON,
the heater will start as needed. This is regulated in accordance with the
temperature set in point 1 of the user menu.
A1: Off
(On/Off)
A2 – Humidity
control
Humidity control is activated. This must be set to ON
to be active.
A2: Off
(On/Off)
A3 – Boost time Set the desired time for temporarily increased fan speed, activated via
the boost button on the main display.
A3: 30 mins
(1–120 min)
A4 – Timer, levels 3
and 4 – On/Off
When the ventilation system is set to fan level 3 and 4, the system will
automatically revert to fan level 2 after the number of hours set in A5
when this setting is set to ON. If the set point is set to OFF, the system
will run at level 3 or 4 until the fan level is changed manually.
A4: Off
(On/Off)
A5 – Timer, level 3
and 4 – timers
If A4 is activated, you can specify how many hours the system should
run at level 3 or 4 before it automatically reverts to level 2.
A5: 3 hours
(1–9 hours)
B1 – Fan calendar Four separate timers can be set to change the fan level each day.
The calendar can be adjusted separately for each day of the week if
necessary. To use the same values for all days of the week, the schedule
can be copied by pressing the "apply to all days" button.
B1: Not in use
Not in use/Levels
1–4/Standby)
B2 – Temperature
calendar
Four separate timers per day can be set to adjust to a lowered nominal
temperature (e.g. for earlier opening of the bypass at night during the
summer). The calendar can be adjusted separately for each day of the
week if necessary. To use the same values for all days of the week, the
schedule can be copied by pressing the "apply to all days" button.
B2: Not in use
Not in use/Reduced/
Normal)
B3 – Activate
calendar
It is possible to activate/deactivate the schedule for the fan set in B1
and the schedule for the temperature set in B2.
Fan calendar: Off (On/
Off)
Temperature calendar:
Off (On/Off)
B4 – Alternative
temperature
Allows you to adjust the lowered temperature setpoint selected in B2.
The temperature selected here will be an offset of the temperature
selected in the main menu "desired temperature".
B4: 0°C
(-10 to +10)
C1 – Time Setting the time (important for error handling) -
C2 – Date Setting the date (important for error handling) -
C3 – Summer time Automatic change between summer/winter time C3: On
(On / Off)

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Menu Description Factory setting (max./
min. values)
D1 – Language The language on the display can be changed. D1: English
(English/Dansk/
Deutsch/Svenska)
D2 – Screen saver
time
Idle time before the screen saver is activated.
0 = screen saver off
D2: 10 minutes
(0–600 min)
D3 – Display Lock
Time
Activate lock time by touching the lock symbol on the main display. D3: 5 sec.
(0–120 sec.)
D4 – Password Main menu, password:
Select password to lock access to main menu. If a password has been
selected, the user will be prompted to enter the password the next
time they try to access the main menu. To disable the password prompt,
enter “0000” as the password.
Service menu, password:
Select password to lock access to the service menu. If a password has
been selected, the user will be prompted to enter the password the
next time they try to access the main menu. To disable the password
prompt, enter “0000” as the password.
-
D5 – Firmware
update
Firmware for the Optima 270 controller and display can be updated
using a micro SD card inserted in the SD card reader of the Optima
Touch. To update the control unit and display, press "start update" when
the SD card containing the latest firmware has been inserted into the
card reader.
-
EA – Save/Load
settings
EA1 – Save settings
Saves the settings from the Optima270 controller to the display.
EA2 – Load settings
Loads settings stored in EA1 and transfers data to a new Optima 270
PCB.
-
EB – Fan level EB1 – Level 1 Supply Air
Level 1 is the lowest speed, and is usually used when no one is home.
Both fans can be configured independently of each other with all levels,
so that the air flow is the same in the supply air and in the exhaust air,
thus resulting in optimal operation.
Specialised air measurement equipment must be used to adjust the
system. It is not recommended to configure the air flows without the
help of an expert. Incorrect configuration can lead to higher energy
consumption or an unpleasant indoor climate.
Setting option: between 0 and 100%.
EB2 – Level 2 Supply Air
Level 2 is the system's recommended speed for an optimal indoor
climate.
It should be adjusted to the home's ventilation requirements.
Setting option: between 0 and 100%.
EB3 – Level 3 Supply Air is typically configured for a high level of
activity in the house.
EB1: 30%
(0–100%)
EB2: 50%
(0–100%)
EB3: 75%
(0–100%)

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Menu Description Factory setting (max./
min. values)
EB – Fan level EB4 – Level 4 Supply Air is typically configured at 100% airflow for
rapid air exchange throughout the house.
Remember that a higher air exchange rate increases energy
consumption.
EB5 – Level 1 Exhaust Air
The fan speed is regulated to match the amount of supply air at level
1.
EB6 – Level 2 Exhaust Air
The fan speed is regulated to match the amount of supply air at level
2.
EB7 – Level 3 Exhaust Air
The fan speed is regulated to match the amount of supply air at level
3.
EB8 – Level 4 Exhaust Air
The fan speed is regulated to match the amount of supply air at level
4.
EB9 – Fan mode
Use % if no built-in airflow sensors are connected. Fan speed inputs
EB1 to EB9 will be based on the % of maximum capacity.
Select m3/h as the setting for constant air flow control.
Note that this requires built-in airflow sensors in the system.
Be aware that using this function without air flow sensors will lead to
incorrect volume flows in the system.
Please note that the fans will automatically adapt to an increased
drop in pressure (e.g. clogged filters) to maintain a constant air flow
– in this case, increased fan power consumption can be expected.
When selecting m3/h, EB1 to EB9 will automatically allow direct
setting of the desired air volume in m3/h. Please note that m3/h
setpoints must match the capacity of the ventilation system. When
using m3/h regulation, 1% corresponds to 10 m3/h (in general for all
parameter settings related to fan operation).
EB10 – RPM Alarm
Off = Fan RPM feedback is not actively used.
On = If RPM feedback from the fans reaches 0 RPM and the fan is
expected to run, the ventilation system will shut down and display an
alarm.
EB11 – Reset RPM Alarm
Enable this feature to reset the RPM alarm when the problem has
been resolved.
EB4: 100%
(0–100%)
EB5: 30%
(0–100%)
EB6: 50%
(0–100%)
EB7: 75%
(0–100%)
EB8: 100%
(0–100%)
EB9: %
(%/m3/h)
EB10: Off
(On/Off)
EB11: Off
(On/Off)
EC – Regulator EC1 – Frost protection
Off = No active frost protection.
T3 outdoor air = Electric preheater controlled by the temperature
sensor for outdoor air (T3).
T4 Exhaust = Electric preheater controlled by the temperature
sensor in the exhaust (T4).
EC1: Off
Off / T3 outdoor air
/ T4 Exhaust / Vent.
Reduc. / Rotor Reduc. /
Vent.+Rotor

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Menu Description Factory setting (max./
min. values)
EC – Regulator Vent. Reduc. = The fan speed for supply air is gradually reduced to
keep the temperature sensor in the exhaust (T4) at the EC2 setpoint.
Rotor Reduc. = Rotary heat exchanger speed is gradually reduced to
keep the exhaust temperature sensor (T4) at the EC2 setpoint. The
de-icing process starts automatically, depending on the measured
indoor humidity and outdoor air temperature. Minimum rotor speed
in de-icing mode = 1 RPM.
Vent.+Rotor = Rotary heat exchanger speed is gradually reduced to
keep the exhaust temperature sensor (T4) at the EC2 setpoint. The
de-icing process starts automatically, depending on the measured
indoor humidity and outdoor air temperature. Minimum rotor speed
in de-icing mode = 1 RPM. If the EC2 setpoint is not reached in time,
reducing the supply air fan speed will help to achieve this.
EC2 – Frost reduction
Adjustable setpoint for frost protection strategy EC1
EC3 – Regulation method
T1 Supply Air = Airborne climate control is based on the supply air
sensor.
T7 Exhaust = Airborne climate control is based on the temperature
sensor for the exhaust air sensor.
EC4 – 0–10V output selector
Bypass = 0–10 volt output L11 can be adjusted to control the 0–10
volt bypass motor.
Rotor = 0–10 volt output L11 can be adjusted to control the rotary
heat exchanger.
Water valve = 0–10 volt output L11 can be adjusted to control a
water-based post-heating surface.
EC5 – Auxiliary relay H17
Setpoint Function
0The relay is off.
1The relay is on when the system is running. This can be used to e.g.
open and close outdoor air and exhaust air dampers.
2The relay is switched on when extra heat is required, or when the
circulation pump must run when heating with water post-heating is
required.
3The relay is on when the “Change filter” warning is active. This can
be used to activate an external alert.
4The relay is on when cooling is required.
5The relay is switched on if one of the following two conditions is
met:
• The outdoor temperature, sensor T9, is lower than the set value in
EC8 (frost protection temperature, typically set to 5°C).
• The outdoor temperature, sensor T9, is >15°C and the room
temperature is > setpoint +1°C.
EC2: 0
(-10–10)
EC3: T7 Exhaust air
(T1 Supply air / T7
Exhaust air)
EC4: Water valve (water
valve/rotor/bypass)
EC5: 0
(0–6)

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Menu Description Factory setting (max./
min. values)
EC – Regulator 6The relay will be on when terminal L1 is shorted/activated (e.g.
by connecting a kitchen cooker hood to the ventilation unit). This
function can be used to activate a damper, which reduces the airflow
to the rest of the house and focuses the exhaust air through the hood.
EC6 – Regulation of water
If a water post-heating surface with motor valve is installed in the
system, it may be necessary to change the regulation time. The shorter
the regulation time, the faster the motor valve will regulate.
EC7 – Water frost
If a water post-heating surface with motor valve is installed in the
system, a frost protection sensor must be installed on the water post-
heating surface and the setpoint must be set to ON.
If no frost protection sensor is installed, the setpoint must be set to OFF.
EC8 – Water frost temp.
If frost protection in EC7 is set to ON, the frost protection temperature
must be set to the temperature at which the system should stop, and
the motor valve must fully open the hot water flow.
EC9 – System stop
Allows you to choose whether it is possible to stop the system by
selecting "standby" under the settings for fan speed. If the setpoint is
set to OFF, the system cannot be turned off.
If “On” is then selected, “standby” will be displayed in the fan speed
selector on the main display.
EC10 – Right/left model
Right = The ventilation system designed as a right-facing model (only
for counter-flow heat exchanger units and right-facing rotor version).
Left = The ventilation system designed as a left-facing model (only for
counter-flow heat exchanger units).
Rotor left = The ventilation system designed as a left-facing model
(applies only to units with a rotary heat exchanger).
Note that this setting should only be changed by the installer, as there
is a risk of disrupting the machine's functions if an incorrect setting is
used.
EC11 – Factory Reset
Reset – Vent. = Resets all controller values (except fan speeds) to
factory settings.
Reset all = Resets all controller values to factory settings.
Make sure to take a note of all previous settings before resetting
controller values.
EC12 – System type
0 = Basic setup
1 = T3=T1 ; T7=T4
Setpoint 1 is used for ventilation systems with a double integrated
temperature sensor in the heat exchanger, to ensure an accurate
temperature is indicated during active bypass
EC6: 20 sec.
(1 sec. to 250 sec.)
EC7: Off
(On/Off)
EC8: 5°C
(0–10°C)
EC9: Off
(On/Off)
EC10: Right
(Right / Left /
RotorLeft)
EC11: Off
(Off / Reset – Vent. /
Reset all)
EC12: 0
(0 / 1)

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Menu Description Factory setting (max./
min. values)
EC – Regulator EC13 – Output H3 option
H3 Operating modes
Preheat = R1 released for operation as preheater (activated via EC1)
Post-heat = R1 released for operation as post-heating surface
(activated via A1)
Always on = R1 is switched on as operating relay, independent of EC1
and A1
EC13: Preheat
(Preheat / Post-
heating / Always on)
ED – Electric
heating
ED1 – Heater reg
If an electric post-heater is installed on output H3, it may be necessary
to change the regulation time.
ED2 – Preheat temperature
Temperature setpoint, frost protection preheater – see menu
EC1 for reference temperature sensor
ED3 – Preheat PI P
P band for the PI controller for the electrical modulating preheater. The
P band controls the amplification of the control unit after a deviation
from the setpoint (accelerator).
ED4 – Preheat PI I
I band for the PI controller for the electrical modulating preheater. This
function controls how quickly the control unit adapts to a deviation
from the setpoint (brake).
ED5 – Preheat reg.
The preheat cycle function works as follows: E.g. necessary output 50%
and cycle = 60 sec. means that the controller turns on the preheater for
30 seconds and turns it off for 30 seconds.
Please note: Please refer to your country-specific restrictions when
customising this feature. The modulating preheater function refers to
the value set in setpoint EC1.
The preheater will aim to maintain a stable outdoor air temperature
according to this set point.
When the modulating preheater is used, the existing outdoor air
temperature sensor (T3) built into the ventilation unit can be used as a
reference. No additional temperature sensor is required.
ED6 – Post-heating offset
Offsetting of post-heating surface with reference to the setpoint for
the desired temperature.
E.g. desired temperature = 20°C Offset value = 2, the post-heating
surface will aim to maintain a supply air temperature of 18°C.
ED7 – Post-heating PI P
P band for the PI controller for the electrically modulating
post-heating surface. The P band controls the amplification of
the control unit after a deviation from the setpoint (accelerator).
ED8 – Post-heating PI I
I band for the PI controller for the electrically modulating
preheater. The function controls how fast the controller
adapts to a deviation from the setpoint (brake).
ED1: 3 min
(1–30 min)
ED2: –3°C
(-15 to +10°C)
ED3: 5
(1–255)
ED4: 200
(1–255)
ED5: 40 sec.
(10–120 sec.)
ED6: –2°C
(-10 to +10°C)
ED7: 5
(1–255)
ED8: 200
(1–255)

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Menu Description Factory setting (max./
min. values)
ED – Electric
heating
ED9 – Post-heating reg.
The post-heating surface function works as follows: E.g. necessary
output 50% and cycle = 60 sec. means that the control unit
turns on the post-heating surface for 30 seconds and turns it off for 30
seconds.
Please note: Please refer to your country-specific restrictions when
customising this feature.
The modulating post-heating surface function refers to the value
adjusted in the selected temperature and selected sensor for the
control (see EC3). To allow the post-heating surface to work, set the
setpoint A1 to On. The post-heating surface will aim to
maintain a stable temperature in the supply air according to this
setpoint.
When using the modulating post-heating surface, it is necessary to
replace the supply air temperature sensor (T1) in
the ventilation unit with a new temperature sensor installed
after the post-heating surface.
ED9: 40 sec.
(10–120 sec.)
EE – Bypass EE1 – Bypass max
The temperature at which the bypass should be 100% open can be set
here.
A temperature difference can be set here, which means that if you want
the bypass to be 100% open at e.g. 23°C and if the set temperature is
20°C, this menu item must be set to 3°C.
The bypass will open provided that:
1. The exhaust air temperature T7 is higher than the outdoor air
temperature T3.
2. The outdoor air temperature is above the set temperature in menu
EE2 (desired temp – EE2) = 21 – 4 = 17°C outdoor air.
Units with modulating bypass.
If the temperature rises to 0.5°C above the desired temperature, the
bypass damper will start to open. The bypass is 100% open when the
temperature reaches the "desired temperature" setpoint + the
temperature difference set in this menu item.
To ensure an even opening of the bypass, the temperature at which the
bypass opens completely must be set to approx. 3°C above the desired
temperature.
Units with on/off bypass
The bypass opens when the temperature reaches the desired
temperature + the temperature difference set in this menu item.
EE2 – Switch off bypass
To prevent the bypass damper from opening at low outdoor air
temperatures and blowing cold, unheated air into the home, use this
function to configure the minimum outdoor air temperature at which the
damper should
be closed. The value is the largest difference that should exist between
the desired temperature and the lowest outdoor air temperature
(offset).
Setting options: Between 0 and 20°C.
If 0°C is selected, the function will be deactivated and there will be no
limit for the lowest outdoor temperature.
EE1: 3°C
(1–10°C)
EE2: 4°C
(0–20°C)

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Menu Description Factory setting (max./
min. values)
EE – Bypass EE3 – Forced speed
In this menu, the desired forced, stepped fan speeds can be selected
when the bypass opens for night cooling and when the setpoint in EE4 is
exceeded.
EE4 – Forced temp.
Offset value setpoint for enabling forced fan speed, e.g. when bypass is
open for night cooling (fan speed increased by the value set in EE3).
Desired temperature 20°C
EE1 = 3°C
Bypass opens at 23.1°C.
EE4 = 3°C
Increase in fan speed at 26.1°C
EE5 – Bypass minimum on
Bypass will be open to at least the set value.
EE3: 0%
(0–100%)
EE4: 3°C
(0–5°C)
EE5: 5 mins.
(0–60 min)
EF – Filter EF1 – Reset filter timer
Select this option to reset the filter timer to 0 days.
The current counter value will show days since the last filter reset.
EF2 – Filter timer
Setpoint for adjusting the number of months until the filter alert is
activated.
0 months = filter hours disabled
EF3 – Filter/stop
To ensure that the filters are changed when the filter change warning
is active, the setpoint can be set to ON. The system will then stop
automatically after 14 days if the filters have not been replaced in the
meantime.
If this precaution is not required, the setpoint can be set to OFF and the
system will continue to run.
EF1: Reset filter
EF2: 3 months
(0–12 months)
EF3: Off
(On/Off)
EG – Humidity
control
EG1 – Humidity max. temperature
Setting the end point for outdoor temperature compensation (T3),
see the X-axis on the graph. If 0 is selected – outdoor temperature
compensation is deactivated and the set value under EG2 is maintained
as a constant setpoint.
EG2 – Humidity max. value
Sets the endpoint for outdoor temperature compensation, see the
Y-axis on the graph (desired max. humidity value).
EG3 – Humidity vent speed
Determines how much the fan speed can vary relative to
the desired fan speed.
Examples: Set point, fan speed level 2 (EB2 / EB6) = ± 15%.
Please note: If EB9 is set to constant volume flow control (m3/h), then
the EG3 setting will correspond to setpoint x 10 = influence in m3/h
e.g. EG3=5 corresponds to the permitted variation in the air volume of
up to 5 x 10 = 50 m3/h
EG1: 15°C
(0–25°C)
EG2: 60%
(35–85%)
EG3: 15%
(5–30%)

18
Menu Description Factory setting (max./
min. values)
EG – Humidity
control
EG4 – Humidity reg. frequency
Setting the desired frequency for how often the fan speed
can be changed.
The function is defined as 1% per unit of time.
When humidity control is activated, the current humidity is continuously
measured via the integrated humidity sensor in the ventilation system,
located in the exhaust air duct.
EG4: 10 minutes
(1–60 min)
EH – Rotor EH1 – Speed (rpm)
The setpoint for the minimum speed of the rotary heat exchanger
(revolutions per minute).
Be aware that a reduction in the RPM value may reduce the heat
recovery rate but increase the control range for moisture recovery.
These values should be adjusted by an installer.
EH2 – Rotor stop °C
Offset set point for temperature where heat recovery with a rotary heat
exchanger is stopped.
E.g.
setpoint: temperature 20°C
EH2 = 2
Rotary heat exchanger stops when outdoor air temperature T3 is 20-2 =
18°C.
This feature will save energy for the rotor motor when there is limited
opportunity to recover energy
.
EH3 – Rotor max. defrost time
Setpoint in minutes for the maximum time that can be spent de-icing
the rotary heat exchanger. If the time limit is exceeded, the rotary heat
exchanger will return to normal operation.
EH4 – Rotor defrost pause
Setpoint in hours corresponding to the minimum time interval between
de-icing cycles.
EH1: 10 rpm
(0–25 rpm)
EH2: 2°C
(0–10°C)
EH3: 30 mins
(1–120 min)
EH4: 4 hours
(1–8 hours)
EI – Demand control EI1 – CO2control
On = Activates external sensors for demand control (if available).
Off = No external sensors available for demand control.
EI2 – CO2setpoint
Setpoint for the desired CO2level in PPM.
If the CO2level rises above the setpoint, the fan will increase the speed
incrementally to keep the CO2level at the set point.
EI3 – CO2level 4 time
Setpoint in minutes for the time between incremental increases/
decreases in fan speed according to CO2level (see setpoint EI2)
EI4 – Number of Rf CO2sensors
Select the number of wireless CO2sensors connected.
Make sure the dip switches in the CO2sensors are set correctly
according to the separate documentation.
EI1: Off
(On/Off)
EI2: 800 PPM
(400–2000 PPM)
EI3: 30 mins
(0–1000 min)
EI4: 0
(0–4)

19
Menu Description Factory setting (max./
min. values)
EJ – Fire control EJ1 – Number of fire dampers
Setpoint for the number of fire dampers connected to the system that
should be monitored.
0= Fire control system inactive
1-4 = Number of dampers connected
EJ2 – Fire test/Reset
Off = Automatic mode, damper will be tested once per month according
to the schedule.
Test = Test system now. This function starts a forced function test of
the fire damper and the result is shown on the display (NOTE: There
will be a delay of up to 240 seconds from the start of the test to
completion).
Reset = Reset fire alarm. In case of any errors during the damper test
or in the damper/smoke detector or a lack of feedback, the ventilation
system will shut down and the display will show an alarm symbol.
Restarting the device requires a fire auto reset.
EJ3 – Fire test, date
Schedule when the automatic monthly test of fire/smoke dampers is
performed.
EJ4 – Fire test, hour
Schedule when the automatic fire/smoke damper test is performed.
EJ1: 0
(0–4)
EJ2: Off
(Off/Test/Reset)
EJ3: 1
(1–31 days)
EJ4: 0
(0–23 hours)
EK – District heating
control
PLEASE NOTE:
If no external outdoor temperature sensor is connected to the control
unit, the built-in outdoor air temperature sensor in the ventilation
system is used as a reference in calculating temperature set points for
weather compensation.
EK1 – District heating mode
Off = No external heating circuit connected.
Underfloor heating = Underfloor heating circuit connected.
Radiator = Radiator heating circuit connected.
EK2 – Outdoor compensation at –12°C
Set point for the flow temperature at –12°C outdoor temperature.
EK3 – Outdoor compensation at 20°C
Setpoint for the outdoor temperature when the supply temperature is
20°C.
An outdoor air temperature that exceeds the setpoint in EK3 will close
the heating circuit (summer stop).
EK4 – Offset of compensation curve
Setpoint in °C at which the heat compensation curve set in EK5 will
have the greatest influence.
EK5 – Compensation curve
The heating curve can be increased in increments of 0–5°C with a
maximum influence according to the value set in EK4.
EK1: Off
(Off/Floor/Heater)
EK2: 45°C
(20–90°C)
EK3: 20°C
(15–25°C)
EK4: 2°C
(-10 to +10°C)
EK5: 2°C
(0–5°C)

20
Menu Description Factory setting (max./
min. values)
EK – District heating
control
EK6 – Max. flow temperature
The supply temperature will be limited to a maximum of 45°C if
underfloor heating is chosen in EK1.
The supply temperature will be limited to 90°C if radiator heating is
selected in EK1.
EK7 – Valve time (sec.)
Time from 3-point control valve fully closed to fully open (depends on
actuator and valve stem configuration). For more information refer to
the valve supplier's manual.
EK8 – Max. return temperature
If the maximum return temperature exceeds the temperature setpoint,
the valve will close incrementally until the return temperature reaches
the set point.
EK9 – Neutral zone
Hysteresis for temperature control via PID.
EK6: 45°C
(20–65°C)
EK7: 150 sec.
(1–255 sec.)
EK8: 50°C
(25–70°C)
EK9: 1°C
(0–10°C)
EK10 – Heat PI P
PI controller's P-band.
By increasing this value, the control unit will aim to reach the set point
temperature faster (with the risk of exceeding the set point).
EK11 – Heat PI I (x 10)
PI controller I-band.
By increasing this value, the control unit will aim to reduce overshoot/
offset of temperatures (with the risk of slowing down the control unit).
EK12 – Heat reg. time
The regulation time of the PI control unit.
Increasing this value will slow the control unit down, increasing the
interval between recalculation of the valve position.
EK10: 20
(0–255)
EK11: 50
(0–255)
EK12: 5 sec.
(1–120 sec.)
EL – Modbus EL1 – Modbus address
Modbus slave address for the device.
EL2 – Modbus baud rate
Choose either 9600 or 19200 baud, depending on the type of
application.
EL3 – Modbus parity
Select even or odd depending on the type of application.
EL4 – Modbus modify
0 = writing to modbus setpoints not allowed
1 = writing to modbus setpoints limited
2 = writing to modbus setpoints full access
EL1: 1
(1–247)
EL2: 9600 baud (9600
/ 19200 baud)
EL3: Even
(None / Even / Odd)
EL4: 1
(0/1/2)
EM – Forced control Enter password to open relay test program (for installers only).
OEM Enter password to open the OEM program (for installers only).
EK6 Max. flow temp.
(45°C Floor)
EK6 Max. flow temp.
(65°C Radiator)