44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
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Normal start-up
If, after applying voltage, an “old” fault is still being sig-
nalled, it will be necessary to reset this first. The safety
interlocks are closed, the IFD reverts to start-up posi-
tion/standby and conducts a self-test.
If it does not determine a malfunction of the internal
electronic circuitry or of the flame sensor, the flame
simulation check then commences. This takes place in
start-up position during the waiting time t
W
.
If no flame simulation is detected during that period,
the safety time on start-up t
SA
then starts to elapse.
Voltage is supplied to the gas valve and ignition trans-
former. The burner starts. After the safety time on start-
up t
SA
has elapsed, the operation signalling contact
closes. This completes start-up.
Start-up without flame signal
If, after the gas valve has opened and the ignition has
been activated, no flame is detected during the safety
time on start-up t
SA
, a fault lock-out will then occur.
Normal shut-down
via signal
Operation signalling contact opens,
gas valve closes
Start-up position/standby
In the event of fault signal: reset
Safety time on start-up t
SA
running,
gas valve opens, ignition in process
No flame detected:
fault lock-out
Flame detected:
operation signalling contact closes
Flame fails:
safety time during operation t
SB
starts to elapse, restart or fault lock-out
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