Test Instant For Mode 2: Testing After Burner Run - Honeywell TC Series Technical Information

Function

3 .1 .6 Test instant for Mode 2: testing after burner run

The tightness test after burner run begins as soon as
the burner is switched off.
To ensure that the valves are checked for tightness once
before starting up the system, the tightness test runs
when the mains voltage (L1) is applied or after a reset. If
the valves are tight, the LEDs
The OK enable signal is not forwarded to the automatic
burner control unit until the thermostat/start-up signal ϑ
and the safety interlock input signal
The tightness test after burner run starts when the
thermostat/start-up signal ϑ drops. The OK enable sig-
nal is only forwarded to the automatic burner control
unit again once the thermostat/start-up signal ϑ and
the safety interlock input signal
The tightness test is valid for 24 hours. If the thermo-
stat/start-up signal ϑ and the safety interlock input
signal are connected during this time, a new tight-
ness test must not be carried out before burner run and
the OK enable signal is set. However, if the 24 hours
have elapsed, a new tightness test is carried out before
burner run.
TC · Edition 08.17
OK
t
M
30s
25s
20s
15s
10s
5s
Mode 2
Power
Power
1
and are green.
1
2
2
have been applied.
have been re-applied.
OK
V1
OK
V2
Mode 2
TEST
don't-care
Mode 2
TEST
don't-care
t
p
Leaks
V1 undicht
If the tightness control TC detects a leak on one of the
Power
V2 undicht
Power
two valves, the red LED lights up for a fault on valve V1
1
or valve V2 . A fault is signalled externally
1
2
t
p
2
e.g. by switching on a buzzer or a warning light.
V1 leaking
V2 leaking
t
p
t
p
L1 (+)
1
10 ϑ
5
TEST
1
2
6 OK
L1 (+)
1
12
10 ϑ
t
p 5
TEST
1
2
6 OK
L1 (+)
12 1
10 ϑ
t
p
5
TEST
1
2
6 OK
L1 (+)
1
12
10 ϑ
5
TEST
1
2
6 OK
12
t
,
t
t
t
25