Isolate Mains Power to appliance as per TOPs P4
Ensure appliance is switched off.
Ensure appliance is switched off.
Observation:
Check that the Air Pressure Switch Tubes and the adaptors to the flue ducting are free and clear from blockages.
Additionally check that the Red Tube is connected to the +ve and the White Tube is connected to the -ve tappings on the Air Pressure Switch.
Notes:
When U-gauge is removed pressure test point should be tightened & checked for gas soundness.
Early models may only have one air pressure switch tube this should be connected to the +ve tapping of the pressure switch.
Additionally check that the Red Tube is connected to the +ve and the White Tube is connected to the -ve tappings on the Air Pressure Switch.
Notes:
When U-gauge is removed pressure test point should be tightened & checked for gas soundness.
Early models may only have one air pressure switch tube this should be connected to the +ve tapping of the pressure switch.
Isolate as per TOPs P4
and refit as necessary