Valves Installed In Series - Honeywell TC Series Technical Information

Application
1 .1 . 7 TC 3 in a multiple burner system with several valves
installed in series
V1 and V2: any.
TC 3 checks slow opening main valves V1 and V2 and
the pipe between these valves for tightness.
The test volume V is supplied and discharged via the
P
TC 3 auxiliary valves.
Valve V2 can only be checked for tightness when the
pressure downstream of V2 approximately corresponds
to the atmospheric pressure and the volume down-
stream of valve V2 is 5 x V
and the pressure switch DG
pressure. The pressure switch must be adjusted in such
a way so that enough pressure is relieved and no air can
get into the pipework.
Once the tightness test has been carried out success-
fully, TC 3 opens the main valves V1 and V2 with the
OK enable signal and enables the downstream burner
control units.
TC · Edition 08.17
. The gas solenoid valve VAS
P
are used to relieve the
VAS
TC 3
p
PZ
u
2
p p
u d
V1 V2
p p
u z
V
P
9
K1
DG
VAS
VAS
TC 3
OK
V2
V1
K1
13