Form 44201460
34
Mar 2019
Direct Burner Spark Ignition Modules.
1.
Turn on the gas supply to the appliance.
2.
Set any time switch or thermostats to demand heat.
3.
Switch on the electrical supply to the appliance.
4.
Following a 7 seconds pre-purge the burner should ignite after a further 10 seconds.
5.
If the burner fails to light, or flame is not detected during the first trial for ignition (a period of 10 seconds)
the gas valve is de-energized and the control goes through an inter-purge delay of 15 seconds before
another ignition attempt. The control will attempt two additional ignition trials before going into lockout.
6.
If 'Lockout' occurs, switch off the electrical supply to the appliance, wait for 5 minutes before switching on
the electrical supply to the appliance to repeat the ignition sequence.
7.
If the appliance fails to ignite after a second sequence, switch off the electricity supply to the appliance
and call the service engineer.
8.
If gas failure occurs after successful ignition, the appliance will attempt one re-ignition before going to
"Lockout" conditions.
9.
To shut down the appliance for short periods of time, switch off the electrical supply to the appliance.
10.
To shut down the appliance for longer periods of time switch off the electrical supply to the appliance and
turn off the gas supply at the gas isolation valve.
11.
If in “Lockout” condition the appliance will automatically attempt to re-ignite after 15 minutes.
SEQUENCE OF OPERATION
18.1)
Normal operation:
The chart below shows the sequence of operation for the normal operating cycle of the heater turned on and off by
a remote thermostat.
If the burner fails to light, or flame is not detected during the first trial for ignition (a period of 10 seconds) the gas
valve is de-energized and the control goes through an inter-purge delay of 15 seconds before another ignition
attempt. The control will attempt two additional ignition trials before going into lockout.
If 'Lockout' occurs, switch off the electrical supply to the appliance, wait for 10 seconds before switching on the
electrical supply to the appliance to repeat the ignition sequence.
Содержание 44625000
Страница 37: ...Form 44201460 37 Mar 2019...
Страница 45: ......
