Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Attach a U-gauge to the gas valve outlet pressure test point
Selector switch to DHW and CH position
CH temperature selector to Max
DHW temperature selector to Min
Selector switch to DHW and CH position
CH temperature selector to Max
DHW temperature selector to Min
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.
Slowly turn the CH Temp selector to Min position.
Does the gas pressure decrease as the burner modulates?
Note: When U-gauge is removed pressure test point should be tightened
and checked for gas soundness.
Slowly turn the CH Temp selector to Min position.
Does the gas pressure decrease as the burner modulates?
Note: When U-gauge is removed pressure test point should be tightened
and checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary