Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
For testing purposes insert a jumper tag at JP2 on the PCB (ISAR jumper tags will fit)
Note:
If you do not have a jumper tag then the test can still be done but will take longer to do
Prior to carrying out this test CLICK HERE for JP2 link information.
Selector switch set to CH/DHW position
Boiler CH thermostat set to MAX
Attach pressure gauge to burner pressure test point
Note:
If you do not have a jumper tag then the test can still be done but will take longer to do
Prior to carrying out this test CLICK HERE for JP2 link information.
Selector switch set to CH/DHW position
Boiler CH thermostat set to MAX
Attach pressure gauge to burner pressure test point
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow the burner to ignite and run in CH mode.
The burner pressure should increase to approximately 35.7 mb.
Turn the CH boiler thermostat down to just above the MIN setting.
Does the burner pressure modulate down to approximately 12.8 mb?
The burner pressure should increase to approximately 35.7 mb.
Turn the CH boiler thermostat down to just above the MIN setting.
Does the burner pressure modulate down to approximately 12.8 mb?
Isolate as per TOPs P4
and refit as necessary