Reznor, Photon, Installation Manual, EN 2021-04, D301310 Page No 41 of 52
MS
3. Unscrew the 2 fixing screws.
4. The thermostat can now be removed from
the heater.
5. Replace thermostat and refit all parts in
reverse order.
6. Press button on thermostat to reset.
7. Follow start up amd commissioning
procedure.
Replacement of ignition controller
1. Disconnect all electrical connections.
2. Unscrew fixings located in the corners of
the controller.
3. Remove program key and refit into new
controller.
4. Fix new controller to electrical panel and
reattach all wiring.
5. Follow start up and commissioning
procedure.
Replacement of ignition transformer
1. Disconnect all electrical connections.
2. Unscrew fixings and remove transformer.
3. Refit in reverse order.
4. Follow start up and commissioning
procedure.
Replacement of lockout circuit
board
1. Disconnect all electrical connections.
2. Pinch circuit board retention clips to
release.
3. Refit in reverse order.
4. Follow start up and commissioning
procedure.
Replacement of fan relay
1. Disconnect all electrical connections,
including blanking connector.
2. Unscrew fixings and remove relay.
3. Refit in reverse order, ensuring blanking
connector is fitted to the normally closed
terminal.
4. Follow start up and commissioning
procedure.
Replacement of air circulation fan
1. Open access door and disconnect fan
motor cables.
2. Loosen cable gland and retract cable.
3. Unscrew fixings securing fan to rear of
appliance.
4. The fan can now be removed from the
unit. For safety reasons it is recommended
to wear gloves when handling the fan.
5. Disassemble and replace parts as needed,
then reassemble.
6. Be sure the fan blade is in the proper
position on the shaft - refer to diagram
overleaf for model 10 and 20.
Blanking connector; this
terminal will be live whenever
the unit axial fan is NOT
in operation so it must be
covered.
