Set Appliance State:
On/Off Switch OFF
Isolate Mains Power to appliance as per TOPs P4
External controls not calling for heat (if external controls are not fitted then remove link between terminals marked LS and LR on connector ST2 on PCB
External controls not calling for heat (if external controls are not fitted then remove link between terminals marked LS and LR on connector ST2 on PCB
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Appliance On/Off control set to On position.
With no demand does the boiler attempt to run?
Note:
The appliance has built in frost protection so that should the system temperature fall below 8°C the pump will run, if the boiler drops below 5°C then the ignition sequence will commence and the burner ignite.
The appliance should run until the flow temperature reaches 9°C.
These conditions should be considered normal operation.
With no demand does the boiler attempt to run?
Note:
The appliance has built in frost protection so that should the system temperature fall below 8°C the pump will run, if the boiler drops below 5°C then the ignition sequence will commence and the burner ignite.
The appliance should run until the flow temperature reaches 9°C.
These conditions should be considered normal operation.
Isolate as per TOPs P4
and refit as necessary