Set Appliance State:

Set boiler to Maximum output (select option below for information)
After activating Maximum output mode turn on a DHW tap
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Check boiler gas rate with meter test dial and stop watch (see note).
Gas rate shall be as per manufacturers specification, refer to Adapt.
Click here to run the gas rate calculator.
Note:
1.The appliance must burn at maximum output throughout test. if the burner modulates or shuts down, results will be inaccurate.
2. If L.P.G appliance choose "Gas rate incorrect @ maximum output".