Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Attach pressure gauge to gas valve pressure outlet test point
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow self-check to complete and boiler to ignite and establish.
After boiler has started to reach a reasonable temperature
(approx. 60°C) slowly turn the CH temperature control down.
Does the burner pressure reduce as the demand is met (modulation)?
Note:
1. At end of test return temperature control to MAX position.
2. When pressure gauge is removed the pressure test point
should be tightened and checked for gas tightness.
3. To reduce time taken for this test you may wish to turn off some radiators.
After boiler has started to reach a reasonable temperature
(approx. 60°C) slowly turn the CH temperature control down.
Does the burner pressure reduce as the demand is met (modulation)?
Note:
1. At end of test return temperature control to MAX position.
2. When pressure gauge is removed the pressure test point
should be tightened and checked for gas tightness.
3. To reduce time taken for this test you may wish to turn off some radiators.
Isolate as per TOPs P4
and refit as necessary