Set Appliance State:

Mains Power Off
Turn Hot Water Tap On
Selector Switch in DHW position
Gas On
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

With DHW flow rate at tap approximately 11.1 l/min (2.45 gals/min) is the temperature rise approximately 35 degrees C?