Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Turn Hot Water Tap On
Set flow rate at tap to approximately 5 l/min
Attach a U-gauge to the gas valve outlet pressure test point
Selector switch to OFF position
CH temperature selector to minimum
DHW temperature selector to maximum
Attach a U-gauge to the gas valve outlet pressure test point
Selector switch to OFF position
CH temperature selector to minimum
DHW temperature selector to maximum
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Selector switch to DHW position
Allow burner to ignite and DHW to heat.
Slowly turn the DHW Temp selector towards Min position.
Does the gas pressure decrease as the burner modulates?
Note:
When U-gauge is removed pressure Test Point should be tightened and checked for gas soundness.
Allow burner to ignite and DHW to heat.
Slowly turn the DHW Temp selector towards Min position.
Does the gas pressure decrease as the burner modulates?
Note:
When U-gauge is removed pressure Test Point should be tightened and checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary