Set Appliance State:

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

Observation:

Allow the burner to ignite and boiler to run in central heating mode.
Monitor the temperature of the integral bypass pipe
(indicated by the red arrow) using a temperature probe.
As the heating operates, the integral bypass should increase in temperature.
Does the temperature of the integral bypass increase during
CH operation as described?