Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Attach pressure gauge to gas valve outlet pressure test point
Selector switch to DHW and CH position
CH temperature selector to maximum
DHW Preheat selector to OFF position
Selector switch to DHW and CH position
CH temperature selector to maximum
DHW Preheat selector to OFF position
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow burner to ignite and ramp up to full pressure and heat system to approximately 60°C.
Slowly turn the CH temperature selector to minimum position.
Does the gas pressure decrease as the burner modulates?
Note:
When pressure gauge is removed pressure test point should be tightened and checked for gas soundness.
Slowly turn the CH temperature selector to minimum position.
Does the gas pressure decrease as the burner modulates?
Note:
When pressure gauge is removed pressure test point should be tightened and checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary