Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set flow rate at hot tap to approximately 4l/min
Attach pressure gauge to the burner pressure test point
Selector switch to hot water
DHW temperature selector to maximum
Attach pressure gauge to the burner pressure test point
Selector switch to hot water
DHW temperature selector to maximum
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Allow burner to ignite and water to heat for approximately 30 seconds.
Turn down the DHW temperature selector while observing the gauge.
Does the pressure decrease as the temperature demand is met?
Notes:
1.The gas pressure is unlikely to be stable and may modulate down and
back up in an attempt to maintain temperature of the hot water.
2. When pressure gauge is removed the pressure test point should be
tightened and checked for gas tightness.
Turn down the DHW temperature selector while observing the gauge.
Does the pressure decrease as the temperature demand is met?
Notes:
1.The gas pressure is unlikely to be stable and may modulate down and
back up in an attempt to maintain temperature of the hot water.
2. 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