Set Appliance State:
Turn Hot Water Tap On
Isolate Mains Power to appliance as per TOPs P4
Selector Switch in DHW position
Connect a U-gauge to the burner pressure test point
Selector Switch in DHW position
Connect a U-gauge to the burner pressure test point
Gas On
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
With the DHW tap fully open does the burner ignite and operate at maximum gas pressure of approximately 11mb?
Decrease the DHW flow rate at the tap to approximately 5 l/min to assist temperature rise. Does the gas pressure modulate down as DHW temperature demand is met?
Note:
When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Decrease the DHW flow rate at the tap to approximately 5 l/min to assist temperature rise. Does the gas pressure modulate down as DHW temperature demand is met?
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