EN-11
EN
Connector J3
B4 Supply air temperature sensor B4
The temperature of the air supplied to the room can be regulated based on the setpoint
(if selected) 20 seconds after the fans are turned on.
BC4 Common for B4
B5 Fresh air (return air) temperature sensor B5
The fresh air temperature sensor protects the heat exchanger from the risk of frost by
adjusting the stages of the electric pre-
heater (depending on unit configuration),
adjusting the bypass for the plate heat exchanger and indicating the fault (+ LED).
BC5 Common for B5
Connector J4
VG 24Vac
VG0 Shared
Y1 Coil 1 valve control (hot water, cold water or triac)
Y2 Rotary heat exchanger wheel speed control
Y3 Supply air fan speed control
Y4 Return air fan speed control
Connector J5
ID1 Fire sensor
If a fire fault is detected, the unit is shut off and the fault is signalled (+ LED)
ID2 Supply air fan monitoring
Feedback from the supply air fan alarms is used to monitor the overload protection
system on the motor's electronic commutator. If this feedback is not received, the unit is
shut off and the corresponding fault is signalled (+ LED)
ID3 Return air fan monitoring
Feedback from the return air fan alarms is used to monitor the overload protection
system on the motor's electronic commutator. If this feedback is not received, the unit is
shut off and the corresponding fault is signalled (+ LED)
ID4 Monitoring of electric pre-heater overheating thermostats
In case of a problem on the electric pre-heater, the electric heater is shut off and the
fault is signalled (+ LED)
ID5 Monitoring of electric heater overheating thermostats
In case of a problem on the electric heater, the electric heater is shut off and the fault is
ID6 Changeover thermostat
Depending on the state of the thermostat (O = Cooling; C = Heating), the valve on the
mixed water coil is adjusted based on the temperature of the water in the supply circuit
and the regulation request.
ID7 Rotary heat exchanger monitoring
If a fault occurs on the rotary heat exchanger, it is shut off and the fault is signalled (+
ID8 Electric heater load shedding contact
When this contact is activated, the electric heaters cannot be started.
IDC1 Shared
Connector J6
B6 Heat exchanger fouling pressure or return air duct pressure sensor B6
The pressure sensor monitors the level of blockage in the heat exchanger. If the heat
exchanger is dirty, the corresponding fault is displayed and the LED lights up, but the
unit is not shut off.
The return air duct pressure sensor ensures a constant pressure in the duct based on
the setpoint. This function is incompatible with the heat recovery unit fouling pressure.
B7 Air quality sensor or intake duct pressure sensor
The air quality sensor is used to monitor the CO2 gas content (measurement range 0 to
2000 ppm) of the air in the room being monitored and to adjust the speed of the fans in
order to draw in more fresh air.
The intake duct pressure sensor ensures a constant pressure in the duct based on the
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