Set Appliance State:
Mains Power Off
Set Multimeter to DC Volts 
DHW Demand
DHW thermostat to MAX
Run DHW tap on Maximum flow rate
Run DHW tap on Maximum flow rate
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Measurement:
Allow ignition sequence to commence and boiler to light.
Test for voltage between the two yellow modureg wires
on the Gas Valve.
Expected voltage is approx 9.8v DC.
Test for voltage between the two yellow modureg wires
on the Gas Valve.
Expected voltage is approx 9.8v DC.
