Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
CH Demand
Attach pressure gauge to fan pressure test point
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Reset appliance if required (press and hold
reset button for 5 seconds then release).
Operate boiler at maximum output.
CLICK HERE FOR INSTRUCTIONS
Fan pressure will read negative and should
be in the white area of the table.
Notes:
1. The pressure measured will be negative.
2. When pressure gauge is removed,
pressure test cap must be replaced.