Auxiliary Valve For Discharge - Honeywell TC Series Technical Information

Application
1 .1 .9 TC 4 with two gas solenoid valves and one auxiliary
valve for discharge
V1: quick or slow opening valve with start rate.
V2: any.
V3: quick opening, nominal size is dependent on test
volume V and inlet pressure p
P
(Project planning information), but is at least DN 15.
TC 4 checks gas solenoid valves V1, V2, the auxiliary
valve V3 and the pipe between the valves for tightness.
It must be ensured that the interspace p
ing the 2-second opening time. This is not guaranteed
by the gas pressure regulator downstream of V2. A relief
line is thus used to discharge the test volume V
into the combustion chamber or into a safe area. Since
valve V2 remains closed during the test, it can also be a
slow opening motorized valve VK.
If all the gas solenoid valves are tight, TC 4 forwards
the OK enable signal to the automatic burner control
unit GFA. The GFA opens the gas solenoid valves V1
and V2 simultaneously. The burner starts.
TC · Edition 08.17
, see page 38
u
is vented dur-
z
safely
P
TC 4
DG
PZ p
u
2
V1
p
p
z
u
V
P
TC 4
1 2 3 4 5 6 7 8 9 10 11 1213
PZ
V3
ϑ
V1
V3
V2
GFA
OK
V2
L1(+)
N(-)
15