Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Turn Hot Water Tap ON
DHW Temperature Control to MAX
DHW Temperature Control to MAX
Attach pressure gauge to inlet pressure test point on gas valve
Unclip Diverter Valve head from the body and leave
in a safe position
Unclip Diverter Valve head from the body and leave
in a safe position
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Reset appliance if necessary
(press and hold reset button for 5 seconds, then release).
Operate boiler at maximum output. CLICK HERE FOR INSTRUCTIONS
Does the pressure gauge show a constant inlet gas
pressure above 16.5mbar (28mbar for LPG appliances)?
Note: When U-gauge is removed test point
should be tightened & checked for gas soundness.
(press and hold reset button for 5 seconds, then release).
Operate boiler at maximum output. CLICK HERE FOR INSTRUCTIONS
Does the pressure gauge show a constant inlet gas
pressure above 16.5mbar (28mbar for LPG appliances)?
Note: When U-gauge is removed test point
should be tightened & checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary