Set Appliance State:
Gas Off
User Control to Off Position
Isolate Mains Power to appliance as per TOPs P4
Attach U-gauge to gas valve inlet pressure test point
Ensure DHW is calling for heat
Attach U-gauge to gas valve inlet pressure test point
Ensure DHW is calling for heat
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
User control switch to ON position.
Allow fan to start and ignition sequence to run.
Observe U-gauge, does the inlet pressure remain
constant at a minimum of 18mb?
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Allow fan to start and ignition sequence to run.
Observe U-gauge, does the inlet pressure remain
constant at a minimum of 18mb?
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Isolate as per TOPs P4
and refit as necessary