28
| Electrical connections
Fig. 8 Main circuit board connections
Position Description
MB
Main circuit board
CB
Connection to the external connection box
1
Terminals for a heater
2
Terminals for a TRIAC
3
Terminals for the mains power supply
4
Terminals for power supply of extract air fan
5
Terminals for power supply of supply air fan
6
Terminals for internal relative humidity/temperature sensor
7
Analog input 1 — Outdoor air sensor
8
Analog input 2 — Supply air sensor
9
Analog input 3 — Freely configurable
10
Analog input 4 — Freely configurable / Overheat temperature sensor (units with
heater)
11
Analog input 5 — Freely configurable
12
Digital input 1 — Rotor guard sensor (VSR, VTR units)/ Damper signal (VTC units)
13
Digital input 2 — Freely configurable / Cooker hood (VTR 150/K unit)
14
Analog output 2 — Freely configurable / Electrical heater controller (VTC 700 unit)
15
Analog output 1 — Rotor of the heat exchanger (VSR, VTR units) / Damper control
(VTC units)
16
Terminals for speed control of extract air fan
17
Terminals for speed control of supply air fan
211477 | A001
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