Set Appliance State:

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

Observation:

2022 V5
The design and length of the condensate pipe can vary greatly between installations. Correct disposal of the condensate is very important to the proper operation of the appliance.
External Waste Connection:
Internal Waste Connection:
Thoroughly inspect all of the boilers internal condensate pipework and any siphon or trap that is fitted removing and servicing as required following manufacturer's instructions. The condensate pipe connecting the boiler to the drain should also be thoroughly checked along its entire length (as far as practical) for blockages or restrictions, ensuring all joints are correctly sealed and free from leaks.
Where the pipe runs externally check for
Check where the condensate pipe joins a sink waste,
Check the installation of the pipe conforms to the Manufacturers Instructions and TOPs A6 Central Heating and Hot Water - Installation of Condensate Pipe.
Isolate Mains Power to appliance as per TOPs P4