Set Appliance State:

Mains Power Off
DHW Demand
Gas On
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:


Test 1:
Apply a DHW demand allow the boiler to light and establish. Remove the demand and monitor the pump and fan they should both continue to run for approximately 20 seconds after the demand.
Test 2:
Apply a CH demand and allow the boiler to light and establish. Remove the demand and monitor the pump and fan, the fan should continue for approximately 20 seconds and the pump should continue for approximately 3 minutes