Set Appliance State:
Gas Off
Turn Hot Water Tap On
Isolate Mains Power to appliance as per TOPs P4
Selector switch in OFF position
CH temperature selector to MIN
DHW temperature selector to MAX
Attach U-gauge to gas valve inlet pressure test point
Selector switch in OFF position
CH temperature selector to MIN
DHW temperature selector to MAX
Attach U-gauge to gas valve inlet pressure test point
Gas On
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
While observing the U-gauge, turn selector switch to hot water position and allow boiler to begin running.
Does the U-gauge show a constant inlet pressure of approximately 20mb?
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Does the U-gauge show a constant inlet pressure of approximately 20mb?
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