Please ensure all the following system checks are completed
Measurement:
System/Boiler is correctly charged as necessary.
System/Boiler is bled of air.
Gas inlet pressure is correct.
Sufficient mains cold water supply to the appliance.
Bypass (internal or external to the appliance) is correctly adjusted as necessary.
Manual reset devices are set (there are two manual reset overheat thermostats one is located on the top R/H corner of the control facia the other is at the top L/H side of the primary heat exchanger).
Note: The mains power should be turned OFF when resetting the devices.
System/Boiler is bled of air.
Gas inlet pressure is correct.
Sufficient mains cold water supply to the appliance.
Bypass (internal or external to the appliance) is correctly adjusted as necessary.
Manual reset devices are set (there are two manual reset overheat thermostats one is located on the top R/H corner of the control facia the other is at the top L/H side of the primary heat exchanger).
Note: The mains power should be turned OFF when resetting the devices.