Genvex OPTIMA 314 User manual

OPERATING
INSTRUCTIONS
OPTIMA 314
THE AIR WE BREATHE

2
TABLE OF CONTENTS
1. Installation.............................................................................................................................................................................4
2. Programming the Optima 314 controller...................................................................................................................5
3. Display.....................................................................................................................................................................................6
4. Start-up ..................................................................................................................................................................................7
5. Controller menu...................................................................................................................................................................8
6. Controller settings .............................................................................................................................................................9
7. Further explanations of humidity and district heating control ......................................................................23
8. Maintenance.......................................................................................................................................................................24
9. Troubleshooting................................................................................................................................................................24

3
1. INSTALLATION OF OPTIMA BASIC
Important information
Safety information
This appliance can be used by children aged from 8 years
and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction concerning
use of the appliance in a safe way and understand the
hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by
children without supervision. Rights to make any design or
technical modifications are reserved.

4
1.1 Installation
Installation of the control panel.
The control panel is designed to be mounted onto a flat
wall.
1.2 Mounting
Find the location on the wall where you will fix the control
panel and mark the screw-hole positions. A min. of four
screws must be used to fix the display fixture to the wall.
Drilling of holes, hole size and the corresponding screws for
fixing the panel depends on the wall material.
When the display fixture has been securely installed to the
wall. Take the Optima Touch display which comes with a
preinstalled wire connected and clip the display carefully
on the fixture. Ensure that the cable is carefully positioned
as indicated on the picture before fitting the display.
NOTE: if the preinstalled 1,8 meter length is not sufficient,
it is possible to replace this with a 4 wire twisted pairs 0,25
mm2 cable with a maximum length of 50 meters.
To remove the display , carefully push the plastic clip
(locking mechanism) as indicated on the picture.
For additional information on connecting the control panel
to Optima 314 – please refer to the electrical diagram in
the installation manual.
1. INSTALLATION OF OPTIMA TOUCH

5
2. PROGRAMMING THE OPTIMA 314
CONTROLLER
A ( 1 : 6 )
AA
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
E E
F F
A2
Approved date:
Combi Blueline
013014
Project number/name
Part stock number
1 /2
Combi Blueline
Sheet number
General Tolerances Material
Part name:
Scale
Designed by
kgthm
Sverigesvej 6, DK-6100 Haderslev, Denmark
Tel: [phone]
Approved by
28-09-2022
CLA
DIN 2768-1 m
Projection Weight
210,000 kg 1 : 6
Rev.
2014
668
25
106
5050
150150
141
303
170 170
142 142
115
302

160
Extract air
160
Supplyair

160
Exhaust air

160
Outdoor air
Internet
connection
Display
connection
600
Hot water circulation
3/4" RG
Cold water inlet
3/4”RG
Hot water outlet
3/4”RG
Heating coil outlet
3/4”RG
Heating coil inlet
3/4" RG
2043
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
A A
B B
C C
D D
E E
F F
A2
Approved date:
Combi Blueline
013014
Project number/name
Part stock number
2 /2
Combi Blueline
Sheet number
General Tolerances Material
Part name:
Scale
Designed by
kgthm
Sverigesvej 6, DK-6100 Haderslev, Denmark
Tel: [phone]
Approved by
28-09-2022
CLA
DIN 2768-1 m
Projection Weight
210,000 kg
1 : 4
Rev.
1 kW electric heating ele
ment
5/4”anode
185 L. tank
ePM1/F7 - Supply air filter
90W Supply air fan
1200W Electric preheater
(Optional)
Counterflow heat exchanger
Evaporator - Heating mode
Condenser - Cooling mode
Condenser - Heating mode
Evaporator - Cooling mode
Coarse/G4 - Extract air filter
Bypass
Drain - Exhaust air
Drain - Supply air
Optima 314 controller
90W Extract air fan
Bypass motor
The control system comes factory-preset, which means
that the unit can be put into operation without changing the
operating settings. The factory setting is only a basic
setting that can be adapted to the operating desires and
demands for the dwelling in question to make it possible to
achieve optimal utilisation and operation for the system.
Depending on the product configuration it will be possible
to either connect the Optima display directly to the Display
connector on top of the machine or (connectors marked
with “display”) or directly on the Optima 314 Controller
PCB.
The Optima 314 controller PCB connection interface
includes terminals for connecting both Modbus Master (for
example building management systems) and Modbus Slave
devices (for example mixing valve controller - or fire box
PCB).
2.3. Installation with Optima Touch display
2.3.1. Connect an Optima Touch controller to the Optima
314 and adjust settings as necessary.
NOTE: The Optima 314 controller parameters can be saved
to the Optima Touch for 1 ventilation unit and be
transferred to a similar system by using the
“EA1 Save“ and “EA2 load settings”.

6
3. DISPLAY
Userinterface Optima Touch – main screen
Touch to change fanspeed
The actual fanspeed will be
indicated by colored fans
indicating fanspeed 1-4
Standby will only be shown
when menu EC3 is set to ON.
Please notice that fans will have
a delay of 3-4 minutes until
they are switched off.
Touch to access the
status information,
alarms and eventlog
menu.
Touch to change room
temperature setpoint
(influences opening of summer
bypass for room cooling etc.)
Touch to activate green light
indicating that active cooling
operation is allowed if required.
If no green light is shown active
cooling is disabled.
If EH2 is set to 0 the icon will
be removed from the display.
Touch to access filter menu.
Here the filtertimer can be
reset and the actual number of
hours the filters has been in
operation can be read.
Note - the filtertimer will only
be shown if D3 lockscreen time
has been set to 0, otherwise
lockscreen timer will be visible Touch to activate green light
indicating that DHW electrical
heating operation is allowed if
required. If no green light is
shown the DHW electrical
heating is disabled.
If EH5 is set to 0 the icon will
be removed from the display.
Touch to go
back to
previous menu.
Touch to access the
user and service
menu.
Touch to increase fanspeed to
step 3 for 30 minutes (time
adjustable in menu A5).
At the bottom of the display:
*Micro USB interface for PC
programming of Optima 314
controller parameters.
*micro sd card – card reader for
firmware update of controller and
display.

7
4. START-UP
4.2 Userinterface Optima Touch – screen saver
Depending on the screen saver settings in menu D – display.
The current screen displayed will switch back to screen
saver mode after 2 minutes. If D2 is set to 0 then the
screensaver will be permanently active. If a time is set in
D2 the screensaver will switch to blank screen according to
the time set.
To reenter the main menu – touch the screen gently for 2
seconds untill the screen reactivates.
4.1 Userinterface Optima Touch – initial start up
During initial start up of the Optima 314 ventilation
controller and with the Optima Touch connected to the
controller, the following information will be shown.
Please wait approximately 1 minute for the initial boot
sequence to complete.
Software version controller: actual software version of
Optima 314 controller.
Software version display: actual software version of
display.
Device ID: the ID of the internet connection secure
protocol device in the controller.
IP-adress: will only be shown if the ventilation unit has
been connected to a router via RJ45 connection
Internet connection status: will indicate whether internet
connection status is connected or disconnected. If status
indicates “disconnected” no connection through Genvex
Connect app or remote monitoring/ remote service can be
done.
Current indoor and outdoor
temperature. Based on
measurements locally in
ventilation unit (fresh air
and extract air sensors)
Current time
and date
Screen saver

8
5.1 Structure, user and service menu in Optima
Touch
The user and service menu structure in the Optima Touch
display is organized in the following sections
A. User: main user settings
B. Scheduler: calender schedules for change of fanspeeds
and temperature setpoints
C. Date/time: date and time settings for info screen and
for time stamping eventlog
D. Display: settings related to display and access to
parameters
E. Service: service menu – please note that this menu
should primarily be used by technicians with knowledge
of the machine operation.
5. CONTROLLER MENU

9
6. CONTROLLER SETTINGS
Menu Description Factory setting and
(max. / min values
A1 - Reheating If there is a reheater fitted to the system, you can choose if the
reheater should operate. If the set point is set to OFF, the heater will
not operate, even when this is necessary. If the set point is set to ON,
the heater will start, as required. It regulates in ac-cordance with the
temperature set in item 1 of the User Menu.
A1: Off
(On - Off)
A2 - Humidity
control
Here you turn on humidity control. It must be set to ON in order to be
active.
A2: Off
(On/Off)
A3 – DHW
temperature
Here the domestic hotwater temperature controlled by the heatpump
can be set. The temperature setpoint is related to the bottom
temperature sensor of the DHW cylinder
A3: 52 °C
(0-60 °C)
A4 – DHW element Here the domestic hotwater temperature controlled by the electrical
immersion heater can be set. The temperature setpoint is related to the
temperature sensor located in the middle of the DHW cylinder.
A4: 50 °C
(0-65 °C)
A5 - Boost time Set the desired time for temporarily increased fan speed, activated via
the boost button on the main display.
A5: 30 min
(1 - 120 min)
A6 - Timer levels 3
and 4
- on/off
When switching the ventilation unit to fanspeed 3 and 4, the system
will automatically return to fanspeed 2 after the number of hours set
in A5 when adjusting this set point to ON. If the set point is set to OFF,
the system will run at speed 3 or 4 until the fanspeeds are manually
changed.
A6 : Off (On - Off)
A7 - Timer levels 3
and 4 - hours
If A6 is set to on , you can enter how many hours the system should run
on level 3 or 4 before it automatically returns to level 2.
A7: 3 hours
(1 - 9 hours)
B1- Fan scheduler Here four seperate timers per day can be set for change of fanspeeds.
The scheduler can be adjusted seperately for each weekday if required.
If the same values shall be used for all weekdays - the schedule can be
copied by touching the button "apply to all days"
B1: Not used
(Not used / level 1-4 /
Standby)
B2 - Temperature
scheduler
Here four seperate timers per day can be set for change to a low-ered
setpoint temperature (eg. for earlier opening of bypass in summertime
in nighttime). The scheduler can be adjusted seper-ately for each
weekday if required. If the same values shall be used for all weekdays -
the schedule can be copied by touching the button "apply to all days"
B2: Not used
(Not used /
Alternative temp (B5)
/ Normal)
B3 – DHW scheduler Here four seperate timers per day can be set for change to a low-
ered setpoint temperature. The scheduler can be adjusted seperately
for each weekday if required. If the same values shall be used for all
weekdays - the schedule can be copied by touching the button "apply to
all days"
B3: Not used /
Alternative DHW temp
(B6) / Normal

10
Menu Description Factory setting and
(max. / min values
B4 - Enable
scheduler
Here it is possible to activate / deactive the fan schedule set in B1 the
temp schedule set in B2 and DHW scheduler set in B3
B1 Fan scheduler: Off
(On - Off)
B2 Temp. scheduler:
Off (On - Off)
B3 DHW scheduler:
Off (On – Off)
B5 – Alternative
tem-perature
Here it is possible to adjust the lowered temperature setpoint
selected in B2. The temperature selected here will be an off-set to the
temperature selected in the main menu “requested temperature”
B5: 0 °C
(-10 to +10)
B6 – Alternative
DHW temperature
Here it is possible to adjust the lowered temperature setpoint
selected in B3. The temperature selected here will be an off-set to the
temperature selected in the main menu “requested temperature”
B6: 0 °C
(-10 to +10)
C1 - Time Adjustment of actual time (important for error handling) -
C2 - Date Adjustment of actual date (important for error handling) -
C3 - Daylight saving
timer
Automatic switch over from summer/winter time ON/OFF C3: On
D1- Language Display language can be changed D1 : English (English
/ Dansk / Deutsch /
Svenska / Dutch )
D2 - Screensaver
time
Idle time before screensaver activate. 0 = screensaver off D2: 10 min
(0 - 600 min)
D3 - Display lock
time
Lock time active when touching lock symbol on main screen
If set to 0 seconds – the filtermenu will be displayed instead of the lock
screen icon on the main screen.
D3: 5 sec
(0 - 120 sec)
D4 - Password Main menu password:
Choose password for locking main menu access. If password is
selected - the next time the user trying to access the main menu will be
prompted for entry of password. To deactive password promt use 0000
as password
Service menu password:
Choose password for locking service menu access. If password is
selected - the next time the user trying to access the Service menu will
be prompted for entry of password. To deactive password promt use
0000 as password
D4: 0000
(0000-9999)
D5 - Firmware
update
Optima 314 controller and display can be firmware updated by use
of a micro-SD card inserted into the SD card reader of the Optima
touch display. Touch "start update" when the SD card containing the
latest firmware has been inserted into the card reader to update the
controller and display.
-

11
Menu Description Factory setting and
(max. / min values)
EA - Save/load
settings
EA1 - Save settings
Saves the settings from the Optima314 controller to the display
EA2 - Load settings
Loads settings stored in EA1 and transfers data to a new Optima 314
PCB
-
EB - Fan speed
levels
EB1 - Level 1 Supply air
Level 1, which is the lowest speed, is usually used when there is nobody
home. Both fans can be configured independently of each other for all
levels so that the air flow in the supply air and in the extract air is equal,
which provides optimal operation.
The adjustment of the system must be performed with specialised
air measuring equipment and can be done without using the main
regulating damper.
Configuring the air flows without expert advice is not recommended.
Incorrect configuration can lead to major energy consumption or
unpleasant indoor climate.
Setting option: between 0 and 100%.
EB2 - Level 2 Supply air
Level 2 is the recommended speed of the system for providing optimal
indoor climate. It should be adjusted to the ventilation requirement of
the dwelling.
Setting option: between 0 and 100%.
EB3 - Level 3 Supply air is typically configured to a level with high
activity in the house
EB 4 - Level 4 supply air is typically configured to 100 % airflow for a
quick replacement of air in the entire house.
Remember that a higher air exchange rate increases energy
consumption.
EB5 - Level 1 Extract air
The fan speed is adjusted until the same air flow is achieved as the
supply air on level 1.
EB6 - Level 2 Extract air
The fan speed is adjusted until the same air flow is achieved as the
supply air on level 2.
EB7 - Level 3 extract air
The air flow of level 3 is adjusted to the same air flow as the supply air
on levels 3 .
EB8 - Level 4 Extract air
The fan speed is adjusted until the same air flow is achieved as the
supply air on level 4.
EB1: 40%
(0-100%)
EB2: 50%
(0-100%)
EB3: 75%
(0-100%)
EB4: 100%
(0-100%)
EB5: 40%
(0-100%)
EB6: 50%
(0-100%)
EB7: 75%
(0-100%)
EB8: 100%
(0-100%)

12
Menu Description Factory setting and
(max. / min values)
EB - Fan speed
levels
EB9 - min air volume mode
If set to on, the supply and extract fans will automatically increase
fanspeed to the values set in EB10 and EB11 - when the heatpump
activates.
This function will ensure that the Combi unit will have the most optimal
operating conditions.
If EB9 is set to off - the fans will not automatically increase fanspeed
and if a fan speed is selected which has lower fanspeed values than
EB10 and EB11 - the heatpump will not activate.
EB10 – min air volume extract
Minimum fanspeed % for extract air fan.
If EB9 is on then this will be the fanspeed when the heatpump is running.
If EB9 is off then lower fanspeeds than this value will prevent the
heatpump from starting.
EB11 – min air volume supply
Minimum fanspeed % for supply air fan.
If EB9 is on then this will be the fanspeed when the heatpump is running.
If EB9 is off then lower fanspeeds than this value will prevent the
heatpump from starting.
EB12 - RPM Alarm
Off = RPM feedback from fans are not used actively
On = If RPM feedback from fans reach 0 and fans are expected to run ,
the MVHR unit will shut down and show alarm.
EB13 - Reset RPM Alarm
Activate this function to reset RPM alarm once the problem has been
fixed
EB9: On
(on/off)
EB10: 40 %
(0-100 %)
EB11: 40 %
(0-100 %)
EB12: On
(on/off)
EB13: Off
(on/off)
EC - Regulator EC1 - Frost protection
Off = no frost protection active
T3 preheat = electrical preheater controlled by fresh air temperature
sensor (T3)
T5 preheat = electrical preheater controlled by temperature sensor
(T5) mounted in the discharge of the heatexchanger
Fan reduction = supply air fanspeed is reduced gradualy to maintain
discharge air temperature sensor (T5) at setpoint value EC2
EC2 - Frost reduction
Adjustable setpoint for frost protection strategy EC1
EC3 – Release system stop
If this setpoint is set to off, it will not be possible to switch off the fans
of the machines. If the setpoint is on , the fans can be switched off.
Please be aware that shutting off the ventilation for longer periods
of time in cold ambient temperatures, can lead to condensation in the
ductwork
EC4 – Factory reset
Reset (-fans) = reset all controller values to factory settings except
fanspeeds
Reset all= reset all controller values to factory settings
EC1: Fan reduction
(Off/ T3 preheat /
T5 preheat /
Fan reduction )
EC2: 8 C
(-10 - +10 C)
EC3: on
(on/off)
EC4: Off
(Reset -fans /
Reset all)

13
Menu Description Factory setting and
(max. / min values)
EC - Regulator EC5 – H3 relay options.
Preheat = the relay will activate a preheater connected to the relay H3.
Adjust setpoint EC1 to T3 preheat or T5 preheat.
Reheat = the relay will activate a reheater connected to the relay H3.
The reheater connected to H3 will activate if the extract air
temperature is setpoint – 1 C and keep running until the extract air
temperature reaches the setpoint temperature.
Please be aware that the H3 relay will switch off when the units is in
heatpump deicing mode.
Always on = the relay will be on continuously.
EC6 – AUX Relay H9
0 : off
1 : The relay is on when the fans are active.
2: The relay is on when there is a need for additional roomheating.
Please note that Menu A1 needs to be on as well.
3: The relay is on when a filterchange is required.
4: The relay is on when additional cooling is required. Please note that
Menu EH2 needs to be on as well. To enable cooling activate the green
light in the cooling icon on the main screen.
5: The control unit can handle an earth heat exchanger using a damper
or brine circuit. The relay will be on in case of one of the following two
conditions:
If The outdoor temperature, sensor T9, is lower than 5 °C. (preheating of
air by brine)
Or
If the outdoor temperature, sensor T9 > 15 °C and the roomtemperature
is > setpoint + 1°C (precooling of air)
6: Floor heating control – The relay is switched on when the sensor in
the tank bottom (T8) is greater than 30°C
7: Floor heating control – The relay is switched on when the sensor in
the tank bottom (T8) is greater than 40°C
8: The relay is switched on when the L1 terminal is short-circuited/
activated (e.g. kitchen hood). This feature can be used with an on/
off damper connected to the H9 relay which shuts off towards the
bathroom when the kitchen hoods is activated to direct the airflow on
the kitchen hood.
9: It is possible to connect a solar pump controlled according to EC8 to
the relay H9. The relay is off when T8 domestic hot water temperature
reaches 52 °C
EC5: Preheat
(preheat/ reheat /
always on)
EC6: 0
(0-10)

14
Menu Description Factory setting and
(max. / min values)
EC - Regulator 10: It is possible to connect a solar pump controlled according to EC8 to
the relay H9. The relay is off when T8 domestic hot water temperature
reaches 65 °C
11: The relay is on if there is no error on the fire control system set in
menu EJ1 connected to the Combi unit.
EC7 – AUX Relay H10
0 : off
1 : The relay is on when the fans are active.
2: The relay is on when there is a need for additional roomheating.
Please note that Menu A1 needs to be on as well.
3: The relay is on when a filterchange is required.
4: The relay is on when additional cooling is required. Please note that
Menu EH2 needs to be on as well. To enable cooling activate the green
light in the cooling icon on the main screen.
5: The control unit can handle an earth heat exchanger using a damper
or brine circuit. The relay will be on in case of one of the following two
conditions:
If The outdoor temperature, sensor T9, is lower than 5 °C. (preheating of
air by brine)
Or
If the outdoor temperature, sensor T9 > 15 °C and the roomtemperature
is > setpoint + 1°C (precooling of air)
6: Floor heating control – The relay is switched on when the sensor in
the tank bottom (T8) is greater than 30°C
7: Floor heating control – The relay is switched on when the sensor in
the tank bottom (T8) is greater than 40°C
8: The relay is switched on when the L1 terminal is short-circuited/
activated (e.g. kitchen hood). This feature can be used with an on/
off damper connected to the H9 relay which shuts off towards the
bathroom when the kitchen hoods is activated to direct the airflow on
the kitchen hood.
9: It is possible to connect a solar pump controlled according to EC8 to
the relay H10. The relay is off when T8 domestic hot water temperature
reaches 52 °C
10: It is possible to connect a solar pump controlled according to EC8 to
the relay H9. The relay is off when T8 domestic hot water temperature
reaches 65 °C
11: The relay is on if there is no error on the fire control system set in
menu EJ1 connected to the Combi unit.
EC7: 0
(0-10)

15
Menu Description Factory setting and
(max. / min values)
EC – Regulator EC8 – Solar Hysteresis
If a solar collector is connected to the coil of the boiler, use this option
to input the temperature difference between the temperature in the
solar collector (T9) and the domestic water temperature (T8) that
should be reached before the solar pump starts. The solar pump will
not stop until T9 is equal to T8. The solar pump will stop under all
circumstances once T8 has reached a temperature of 60 °C
EC8 : 5
(0-5 C)
ED - Electrical
heating
ED1 - Regulation electricity
If an electrical preheater or an electrical reheater is installed, it may be
necessary to adjust the regulation time.
ED2 - Preheating tempeature
Setpoint temperature for 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 controller following a deviation
from the set point (speeder)
ED4 - Preheat PI I
I-band for the PI controller for the electrical modulating preheater. The
function controls how quickly the controller adapts to a deviation of the
set point (brake).
ED5 - Preheat Reg
The Preheat Cycle function works, as follows: E.g. necessary output
50% and cycle = 60 sec means that the controller will switch the
preheater on for 30 sec and off for 30 sec.
Note: Please refer to your country-specific regulations on limitations
when adjusting this function. The modulating preheater function refers
to the value adjusted in set point EC1.The preheater will try to maintain
a steady freish air temperature according to this set point.
When the modulating preheater is used, the existing fresh air
temperature sensor (T3), which is built into the ventilation unit, can be
used as reference. No extra temperature sensor is required.
ED6 - Reheat offset
Offset for reheater with reference to the set point for the requested
temperature.
E.g. requested temp = 20°C
Offset value = 2 reheater aims to maintain a supply temperature of
18°C
ED7 - Reheat PI P
P-band for the PI controller for the electrical modulating reheater. The
P-band controls the amplification of the controller following a deviation
from the set point (speeder).
ED8 - Reheat PI I
I-band for the PI controller for the electrical modulating preheater. The
function controls how quickly the controller adapts to a deviation of the
set point (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 - 120sec)
ED6: -2 °C
(-10 to +10°C)
ED7: 5
(1 - 255)
ED8: 200
(1-255)

16
Menu Description Factory setting and
(max. / min values)
ED - Electrical
heating
ED9 - Reheat reg.
The Reheat Cycle function works, as follows: E.g. necessary output 50%
and cycle = 60 sec means that the controller will switch the reheater on
for 30 sec and off for 30 sec.
Note: Please refer to your country-specific regulations on limitations
when adjusting this function.
The modulating reheater function refers to the value
adjusted in selected temperature and chosen sensor for control (see
EC3). To allow the reheater to operate adjust set point A1=on;The
reheater will try to
maintain a steady supply air temperature according to this set point.
When using the modulating reheater, it will be necessary to replace
the inlet air temperature sensor (T1) in the ventilation unit with a new
temperature sensor installed upstream of the reheater.
ED9: 40 sec
(10-120sec)
EE - Bypass EE1 - Bypass open offset
Here you set the temperature at which the bypass should open. You set
a temperature differential, which means that if you want the bypass to
be 100% open at e.g. 23°C and if the room set temperature is
20°C, this menu item should be set to 3°C. The bypass will open,
provided that:
1. The extract air temperature is higher than the outdoor air
temperature.
2. The outdoor air temperature is above the set temperature in EE2.
The bypass opens when the temperature reaches the requested
temperature + the temperature differential
set in this menu item.
EE2 - Turn off bypass
To prevent the bypass damper from opening at low outdoor air
temperatures and from blowing cold, unheated air into the dwelling, use
this function to configure the lowest outdoor air temperature, at which
the damper must be closed. The value is an expression of the greatest
difference that may exist between the requested temperature and the
lowest outdoor air temperature (offset).
Setting option: Between 0 and 20 °C. If 0°C is selected, the function is
disabled.
EE3 – Bypass time minimum on
Bypass will be open minimum according to the setpoint
EE1: 3 °C
(1 - 10 °C)
EE2: 4°C
(0-20°C)
EE5: 5 min
(0-60 min)
EF - Filter EF1 - Reset filtertimer
select this option to reset filter timer to 0 days
The current counter value will display current days since last filterreset
EF2 - Filtertimer
Setpoint for adjusting months until filteralarm will activate 0 months =
filtertimer deactived
EF1: reset filter
EF2: 3 months
( 0 - 12 months)

17
Menu Description Factory setting and
(max. / min values)
EF - Filter EF3 - Filter/stop
To ensure that the filters are changed when the filter change alarm is
active, the set
point can be set to ON. The system will then stop automatically after 14
days if the filters have not been changed in
the meantime.
If this precaution is not required, the set point can be set to OFF and the
system will continue to operate.
EF3: off (On/Off)
EG - Humidity
control
EG1 - Humidity max temperature
Setting the end point for outside temperaturecompensation (T3), see
the X-axis on the graph.
EG2 - Humidity max value
Setting the end point for outside temperature compensation, see the
Y-axis on the graph (desired max. humidity value).
EG3 - Humidity fanspeed
Setting of how much the fan speed may differ in relation to the desired
fan speed.
Examples
Set point fanspeed level 2 (EB2 / EB6) = ± 15%
EG4 - Humidity regulation frequency
Setting of desired frequency for how often the fan speed may be
changed.
The function is defined as 1% per unit of time.
When humidity regulation is activated, the current humidity is
continuously measured via the integrated humidity sensor in the
ventilation unit, which is placed in the extract air duct.
EG1: 15 °C
(5 - 25 °C)
EG2: 60 %
(35 - 85 %)
EG3: 15 %
(5 - 30 %)
EG4: 10 min
(1 - 60 min)
EH – Heatpump
settings
EH1 – Priority water/air
Choosing water will prioritize water heating first before switching to
room heating and vice versa.
EH2 – Release cooling
Choosing on will enable the cooling icon on the display from where the
cooling can be activated. (green light in the cooling icon on the main
screen means automatic activation of cooling enabled)
Note: Choosing off will remove the cooling icon from the main menu.
EH3 – Cooling activation
Additional offset to EE1 (bypass offset) from when active cooling will
start.
e.g. requested room temperature 20 C
EE1 set to 20 + 3 C the active cooling will turn on when the extract air
temperature reaches 20 + 3 + 3 = 26 C
Please notice that the bypass damper will close when running active
cooling to maximize efficiency.
EH1 : water
(water / air)
EH2 : on (on/off)
EH3: 3 C (0-5 C)

18
Menu Description Factory setting and
(max. / min values)
EH – Heatpump
settings
EH4 – Min outdoor cooling
To prevent the cooling function to activate at low fresh air temperatures
and from blowing cold, unheated air into the dwelling, use this function
to configure the lowest fresh air temperature at which cooling may be
enabled.
EH5 – DHW element
Enable the DHW element icon on the main screen of the touch panel.
(green light in the DHW icon on the main screen means automatic
activation of DHW element enabled).
Note: Choosing off will remove the DHW icon from the main menu.
EH6 – Legionella on/off
Selecting on will enable automatic legionella protection which will heat
up the DHW cylinder to 65 C once a week, according to the calender
EH7, EH8
EH7 – Legionella start day
Choose day to start legionella disinfection
EH8 – Legionella start hour
Choose hour to start legionella disinfection
EH9 – stop defrost temp
The defrosting period ends by default when the evaporator reaches a
temperature of 10 °C, which is the standard setting. Setting this value
lower will reduce the deicing cycle but may lead to built up of ice on the
evaporator.
EH10 – Balanced defrost
Choosing on will maintain the current fanspeed on both supply and
extract air fans – but may lead to longer deicing periods. Choosing off
will stop the supply air fan during the deicing cycle which will typically
be the most efficient deicing strategy.
EH11 – Constant on/off
If the home's other heating systems are not connected to the heat
pump system, the home's other heating systems, e.g. a wood-burning
stove, can stop the heat pump so that the heat pump system with heat
exchanger only blows preheated air into all rooms. This may cause
increasing problems with draught as the temperature drops outside.
Setting EH11 will run the heatpump continuously independent of the
extract air temperature.
Choosing on, will switch off the heatpump when the desired
roomtemperature has been reached.
EH12 – Constant @ temp
If EH11 is set to on, set the outdoor air temperature here to when the
heatpump will need to run continuously to heat the supply air.
EH4: 15 C (0-20 C)
EH5: On (on/off)
EH6: Off (on/off)
EH7: Monday
(Monday-Sunday)
EH8: 01 (00-23)
EH9: 10 C (0-15 C)
EH10: off (on/off)
EH11: off (on/off)
EH12: 5 C (0-10 C)

19
Menu Description Factory setting and
(max. / min values)
EH – Heatpump
settings
EH13 – External override
• Scheduler = the calender programme will determine the operation of
the Combi unit.
• Solar Panel = the solar panel input determines the operation of the
Combi
• Smart grid = the smart grid input determines the operation of the
Combi
See SG functions below
EH14 – PV panel low set
Set voltage input from solar inverter where surplus electricity will
active the heatpump to produce DHW to a higher temperature setpoint
according to setpoint B6
EH15 – PV panel high set
Set voltage input from solar inverter where surplus electricity will
activate both the heatpump and immersion heater to produce DHW to a
higher temperature setpoint according to B6
EH16 – PV panel delay
Time delay before switching between operating modes when signal
from solar inverter fades / in-crease above threshold value.
EH17 – Compressor hysteresis
The default temperature difference between start/stop compressor is
± 0.4 °C. Changing the tempera-ture difference is recommended only
under special operating conditions
EH18 – Compressor mode
Choose Auto to let the Combi automatically switch on/off the
heatpump.
Choose off to enable ventilation and DHW production with immersion
heater (e.g. when compressor is damaged and awaits service)
EH13: Scheduler
(scheduler / solar
panel / smart grid)
EH14: 1V (0-10)
EH15: 5 V (0-10)
EH16: 15 min
(0-60 min)
EH17: 0,4 C (
0,1 – 1,0 C)
EH18: Auto
(Auto / off)
OFF The SG ready function can be activated by the
installer here. Three possible modes can be
selected. This function allows the start of the heat
pump from an external access (See QA1 in Figure
16). SG ready is not active if there is not external
input (SG1 OFF, SG2 OFF).
(SG
BOOST)*
The heat pump and electric heater must start, if
below the max water temperature allowed in the
tank. Both Heat Pump end Electric heater are
forced to operate (SG1 ON and SG2 ON).
(SG
ECO)*
The heat pump operates minimizing costs, only the
heat pump is activated (SG1 OFF, SG2 ON).
(SG
BLOCK)*
The unit can be stopped even if there is a need for
hot water (SG1ON, SG2 OFF).

20
Menu Description Factory setting and
(max. / min values)
EI1 - CO control
On = activates external sensors for demand control (if available)
Off = no external sensors for demand control available
EI2 - CO setpoint
setpoint for desired CO level in PPM.
If CO level increase above setpoint, the fans will increase speed in
steps to maintain CO level at setpoint.
EI3 - CO level time
setpoint in minutes for time between increase/decrease fanspeed
in steps according to CO level (see setpoint EI2)
EI4 - Number of RF CO sensors
Select number of wireless CO sensors connected.
Make sure that the dip switches in the CO sensors are set correct
according to seperate documentation.
EI1: Off
(On/Off)
EI2: 800 PPM
(400- 2000 PPM)
EI3: 30 min
(0 - 1000 min)
EI4: 0
(0-4)
EJ - Fire control EJ1 - Number of fire dampers
Setpoint for number for fire dampers connected to the system which
need to 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 a month according to
schedule
Test = test system now, with this function a function test of the fire
damper will be force started and the result shown in the display (N.B.
there will be a delay of up to 240 seconds from when the test is started
until the test is carried out).
Reset = reset fire alarm, in case of error during damper test, error in
damper/smoke detector or lack of communication, the ventilation unit
will shut down and an alarm symbol will be shown on the display.
To restart the unit, a reset of the fire automation must be carried out.
EJ3 - Fire test date
Schedule for when automatic monthly fire/smoke damper test shall be
conducted
EJ4 - Fire test hour
Schedule for when automatic fire/smoke damper test shall be
conducted
EJ1: 0
(0 - 4)
EJ2: Off
(Off / Test / Reset)
EJ3: 1
(1 - 31 day)
EJ4: 12
(0 - 23 hour)