Test Instant For Mode 3: Testing Before And After; Burner Run - Honeywell TC Series Technical Information

Function

3 .1 . 7 Test instant for Mode 3: testing before and after

burner run

The first test is carried out before burner run (as with
Mode 1):
The tightness test starts with incoming thermostat/
Power
start-up signal ϑ. If the valves are tight, the LEDs
1
and are green. Once the safety interlock input
2
signal is active, the OK enable signal is forwarded to
the automatic burner control unit, see page 24 (Test
instant for Mode 1: testing before burner run).
The second test is carried out after burner run (as with
Mode 2):
The tightness test after burner run starts when the
thermostat/start-up signal ϑ drops, see page 25
(Test instant for Mode 2: testing after burner run).
OK
V1
V2
TC · Edition 08.17
t
M
30s
25s
20s
15s
10s
5s
Mode 3
Power
1
2
26