Set Appliance State:
Mains Power Off
Gas Off
DHW Demand
DHW Selector in Maximum (+) position
CH Selector in Minimum (-) position
ON/OFF Switch in ON position
DHW Selector in Maximum (+) position
CH Selector in Minimum (-) position
ON/OFF Switch in ON position
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:
Allow boiler to light and establish while observing the U-gauge.
Once the boiler has lit does the U-gauge show a constant inlet pressure of at least 18mb?
Note: When U-gauge is removed pressure nipple should be tightened & checked for gas soundness.
Once the boiler has lit does the U-gauge show a constant inlet pressure of at least 18mb?
Note: When U-gauge is removed pressure nipple should be tightened & checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary