Honeywell TC Series

TC · Edition 08.17 9
Application
1.1.3 TC 2 with two gas solenoid valves
Mains voltage = control voltage
V1 and V2: quick or slow opening valves with start rate.
TC 2 checks gas solenoid valves V1 and V2 and the pipe
between the valves for tightness.
If both valves are tight, the TC forwards the OK enable
signal to the automatic burner control unit GFA. This
opens valves V1 and V2 simultaneously. The burner
starts.
V2
V1
p
u
2
V1 V2
PZ
p
u
p
z
TC 2
V
P
TC 2
9
OK
GFA