Set Appliance State:
Isolate Mains Power to appliance as per TOPs P4
Attach U-gauge to burner pressure test point
Disconnect blue wires from gas
valve modureg and make safe
Set service potentiometer to MIN
Attach U-gauge to burner pressure test point
Disconnect blue wires from gas
valve modureg and make safe
Set service potentiometer to MIN
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow burner to ignite and establish.
Is the minimum burner pressure as per the table?
(for RD628 use 28kW values)
Note: When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Is the minimum burner pressure as per the table?
| Boiler Output | Natural Gas | LPG |
| 24kW | 0.9mbar | 3.1mbar |
| 28kW | 0.7mbar | 2.8mbar |
Note: When pressure gauge is removed the pressure test point should be tightened and checked for gas tightness.
Isolate as per TOPs P4
and refit as necessary