Set Appliance State:
Gas Off
On/Off Switch OFF
CH Demand
Isolate Mains Power to appliance as per TOPs P4
Attach pressure gauge to inlet pressure test point
External controls calling for heat
CH temperature switch to maximum
DHW temperature switch to minimum
Attach pressure gauge to inlet pressure test point
External controls calling for heat
CH temperature switch to maximum
DHW temperature switch to minimum
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Turn On/Off switch to On.
Allow ignition sequence to commence and sparking to occur.
Does the pressure gauge show a constant inlet pressure of at least 18 mb throughout the sequence?
Note: When pressure gauge is removed pressure test point should be tightened & checked for gas soundness.
Allow ignition sequence to commence and sparking to occur.
Does the pressure gauge show a constant inlet pressure of at least 18 mb throughout the sequence?
Note: When pressure gauge is removed pressure test point should be tightened & checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary