25
Control terminal connection
Labels
Definition
Comments
M17
Air supply temperature
sensor
Sensor connected in
factory
M16
M12
CO2 sensor – 010 V
Active if option
selected
M4
GND
Bridged by default on
terminal block
M5
CTA external shutdown
M4
GND
NO
M3
High speed
M8
Fire Alarm contact
Bridged by default on
terminal block
M7
GND
M34
CTA Alarms (A) return
relay
NO
M35
M36
CTA Alarms (B) return
relay
NO
M37
RG1
Fresh air damper relay -
ON/OFF
NO (Active if option
selected)
RG2
+24
24V AC
Damper servo-motors
-24
+24
24V AC
CO2 probe
-24
CO2 sensor: control according to CO2 content in room.
- Connect M12-M4 for 0-10 V signal return.
- C24 / GND for sensor power supply.
Unit external shutdown: ON/OFF instruction to Unit.
- Connect M5-M4 for Unit ON/OFF instruction.
High speed: forced operation at full speed for a given time (to be configured in software).
- Connect M4-M3 for the High Speed instruction.
Fire Alarm contact: triggers forced ventilation at a given speed (to be configured in software).
- Connect M8-M7 for the fire alarm.
-
Caution:
according to article CH38 (ErP) for public buildings and containing several units that handle over 10,000 m
3
/h for the same area; or which
supply sleeping areas: a standalone external trigger must automatically control the shutdown of the fan unit in the event of fire. To do this,
set the airflow to 0%. Refer to the configuration instructions.
Inlet/outlet damper: refer to section 2.6.2.
Alarm return to Unit: alarm return relay (potentially free).
- Connect M36-M37 (max. voltage 24 V AC).
- Normally open.
- Contact closes in the following cases: fire alarm / fault on water coil pump / fault on motor.
Quick-connect terminal -
cable cross section 0.14 to 1.5 mm² -
rigid connector or crimped end piece
recommended
4.1 Hard-wired control options
4. CONTROL OPTIONS
M17
RG
2
M5 M3 M8 M36 M34
-24 -24
M16
+24
+24
M35
M37
M7
M4
M4
RG
1
M12
Tver
RG
2
M4 M4 M8 M34 M36
+24
M17
Fus
M33
M35
M37
M7
M4
M4
M32
M16
M12
Horizontal 2-terminal bridge
Horizontal 3-terminal bridge
Vertical 2-terminal bridge
Vertical 3-terminal bridge
