Set Appliance State:

Mains Power Off
Turn Hot Water Tap On
Place temperature probe in the flue sample test point
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Run the HW tap with a flow rate of approximately 7 litres/min.
After approximately 2 minutes measure the flue gas temperature.
Expect the flue temperature to be in the range of 30°C - 80°C.
Is the flue temperature as expected ?
Note:
Once test is complete, refit the flue sample test point and test its integrity.