Operation
TCG 5xx control unit
Operating cycle phases:
1: No voltage
2: Powering up, no heat request
3: Heating request
4: Opening an air flap, arrival in pre-
ventilation position
5: Checking the rest status of the air
pressure switch
6: Pre-ventilation: energizing of the
motor, checking the air pressure
7: Pre-ventilation
8: Air flap closes to the ignition position
9: Switching on the igniter, unauthorised
flame monitoring
10:Opening of the solenoid valve, flame
formation, safety time: max. 3 s.
11:Awaiting regulator release
12:Opening the air flap, until the
maximum output is reached
13:Closing of the air flap until the
minimum regulation position is
reached
14:Operation at intermediate regulation
power
15:Operation at minimum regulation
power
16:Regulator shutdown, closure of the
air flap
17:Awaiting a new heating request
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