Reznor, Photon, Installation Manual, EN 2021-04, D301310 Iss 0 Page No 21 of 52
C
Commissioning and operation
PHOTON unit heaters must be
commissioned before putting into
service.
Pre-start checks
Prior to starting up the unit, carry out the
following checks:-
• Do not use this appliance if any part has
been subjected to water ingress. Immediately
call a qualified service technician to inspect
the appliance and to replace any part of the
control system and any gas control.
• Check unit suspension. The unit must be
secure.
• Verify that no other parts are fitted which
are not individually supported and secured.
• Check gas pipework for leaks and correct
gas line pressure.
• Purge gas lines of trapped air.
• Check electrical wiring and ensure that
wiring conforms to the wiring diagram. Be
sure that all cables are correctly sized to
meet the requirements of the units.
• Verify that the appliance is earthed by
conducting an earth continuity test.
• Ensure that fuses are of the correct rating
and fuse value.
• Check polarity. Verify that line voltage exists
between the live terminal L1 and earth
ground.
• Check ignition controller program key
matches the resistance value as shown in
Combustion data table for the heater model.
• Ensure that the air discharge louvres are
open.
• Check that no combustibles are near to the
unit. Requirements are in the location and
installation section of this manual.
• Check vent system to be sure that it is
installed according to the combustion air
supply instructions given in the installation
section of this manual.
• Press LC3 thermostat reset button to ensure
it is not in lockout.
Start up
For your safety, follow the
instructions exactly otherwise
damage or injury could occur!
During start up all gas services (up
to the gas meter) must be checked
again for gas soundness to ensure
no leaks are present.
1. Turn on the gas supply and check for gas
leaks. Ensure that all pressure test points are
closed and gas tight.
2. Switch on the electrical supply.
3. Set the room thermostat to call for heat at
high fire (10V).
4. If the red light next to the lockout reset
switch is illuminated, press and hold it for 3
seconds, then release. If the light does not
go off see Fault Finding section.
5. From initial power up there can be a delay
of up to 2 minutes before the heater will
respond to a heat demand. During this
time, the ignition controller performs a self
diagnostic routine.
6. The combustion fan will now run and the
burner will automatically light after about
35 seconds. The air circulation fan will run
within 30 seconds.
7. If the installation is new, 3 start-up cycles
may be necessary due to air still being
present in the gas pipe. Should the air heater
still not light, refer to Fault Finding section.
