Set Appliance State:

Set boiler to 100% output
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.
Gas rate shall be as per manufacturers specification for CH output (see notes).
Note:
1.The appliance must burn at 100% output throughout test. if the burner modulates results will be inaccurate.
2. Gas rate result must take into account any adjustments made to boiler output, due to flue types fitted to the boiler
(refer to manufacturer’s instructions).
3. If L.P.G appliance choose "Gas rate incorrect @ 100% output".