11/2010 - Art. Nr. 4200 1029 8600A 7
Operation
TCH 2xx safety unit
Operating cycle phases:
1: No voltage
2: Powering up, no heat request
3: Heating request
4: Air flap opens to the preventilation
position
5: Pre-ventilation: Switching on the
motor and the igniter
6: Closing the air flap, switching to
the ignition position
7: Unauthorised flame monitoring
8: Starting the burner: opening the
solenoid valve, flame formation,
safety time
9: Flame stabilisation time, post-
ignition time
10: Awaiting regulator release
11: Opening the air flap, until the
opening position of the 2
nd
stage
valve is reached
12: Operation in 2
nd
stage
13: Closing the air flap, until the
closing of the 2
nd
stage valve
14: Operation in 1
st
stage
15: Regulator shutdown, closure of
the air flap to 0°
16: Awaiting a new heating request
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