Set Appliance State:
CH Demand
Isolate Mains Power to appliance as per TOPs P4
Connect a U-gauge to the gas valve outlet pressure point
Set boiler control switch to H position
Connect a U-gauge to the gas valve outlet pressure point
Set boiler control switch to H position
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Allow the fan to run and ignition sequence to commence.
Initially the pressure on the gauge should drop to a negative pressure of approximately -2 mbar.
As the gas valve opens the pressure should increase to 13.7 +/- 0.5 mbar.
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Initially the pressure on the gauge should drop to a negative pressure of approximately -2 mbar.
As the gas valve opens the pressure should increase to 13.7 +/- 0.5 mbar.
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
