Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
DHW Demand
Attach U Gauge to inlet test point
User Display Control set to HW mode only
User Display Control set to HW mode only
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the inlet pressure with the appliance running and the burner lit.
Isolate the cold water inlet to the appliance using the service valve on the underside of the appliance while observing the U-Gauge.
The U Gauge should return to standing pressure as soon as the isolation valve is turned off and the demand ceases.
Note:
When "U" gauge is removed the test point should be tightened and checked for gas tightness
Isolate the cold water inlet to the appliance using the service valve on the underside of the appliance while observing the U-Gauge.
The U Gauge should return to standing pressure as soon as the isolation valve is turned off and the demand ceases.
Note:
When "U" gauge is removed the test point should be tightened and checked for gas tightness
Isolate as per TOPs P4
and refit as necessary