| Isolate Mains Power to appliance as per TOP's P4 |
Remove the PCB cover
Locate jumper/jumper position, next to connector M17 on the main PCB
Observation:
Is there a jumper in location JP9 on the main PCB?
If preheat is enabled boiler will fire to maintain heat exchanger temperature. Firing temperature range 40-55°C (approximately).
Note:
Hot water preheat - enable add jumper to JP6, remove jumper to disable.
If preheat is enabled boiler will fire to maintain heat exchanger temperature. Firing temperature range 40-55°C (approximately).
Note:
Hot water preheat - enable add jumper to JP6, remove jumper to disable.
Isolate as per TOPs P4
and refit as necessary