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
en
