Set Appliance State:
Mains Power Off
CH Demand
Central Heating Thermostat to Maximum Position
DHW Thermostat to Minimum Position
Ensure Primary Heat Exchanger is cool (40°C or cooler)
Boiler On/Off Switch Off
DHW Thermostat to Minimum Position
Ensure Primary Heat Exchanger is cool (40°C or cooler)
Boiler On/Off Switch Off
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Boiler On/Off switch On.
Reset lockout if necessary.
Allow fan to run and ignition sequence to commence.
Does the boiler fire for central Heating?
Note:
If the appliance is too hot and requires cooling down to 40°C or below for the test, run the hot tap with the mains power on to the appliance and the gas turned off.
Reset lockout if necessary.
Allow fan to run and ignition sequence to commence.
Does the boiler fire for central Heating?
Note:
If the appliance is too hot and requires cooling down to 40°C or below for the test, run the hot tap with the mains power on to the appliance and the gas turned off.
