Set Appliance State:
Mains Power Off
Gas Off
Isolate Mains Power to appliance as per TOPs P4
Boiler drained and discharged
Boiler drained and discharged
Observation:
Remove the pump venturi and inspect it for blockages and signs of damage.
Note: Venturi is situated above the pump on the R/H side of the boiler in the return of the primary heat exchanger. The venturi housing has two pipes connected to it that run from the pump flow valve.
Note: Venturi is situated above the pump on the R/H side of the boiler in the return of the primary heat exchanger. The venturi housing has two pipes connected to it that run from the pump flow valve.
Isolate as per TOPs P4
and refit as necessary