Page No 40 of 52 Reznor, Photon, Installation Manual, EN 2024-01, D301310 Iss 5
MS
Replacement of LC1 and LC3 safety
thermostats (Models 25-120)
1. Disconnect LC1 and LC3 electrical
connectors.
Typical LC1 connector
Typical LC3 connector
2. Remove LC3 protective cap and lock
nut. Note that there are two fitted to the
Photon 120 unit.
3. Unscrew the 2 fixings from the mounting
bracket.
4. Withdraw mounting bracket from heater.
Location of
2nd LC3
protective cap
and lock nut
on Photon
120
Location of LC3
protective cap
and lock nut on
Photon 10-100
Fixing screws
x2
5. The thermostats can now be removed from
the mounting bracket.
6. Replace one or both thermostats as
needed. Ensure sensor is pushed up to
the return at the end of the bracket
and secured in place with the retaining
clips. Replace clips if necessary. Ensure
thermostat is held tightly by the retention
clips. It may be necessary to close the clips
with pliers before fitting the thermostat.
7. Refit all parts in reverse order. Press LC3
button to reset thermostat.
8. Seal gaps around thermostat mounting
bracket with silicone sealant to maintain
the integrity of the burner compartment.
9. Follow start up and commissioning
procedure.
Replacement of LC1 and LC3 safety
thermostats (Models 10-20)
1. LC1 replacement is exactly the same as for
models 25-120.
2. To replace LC3, disconnect electrical
connectors.
LC3 and panel location models 10-20
Thermostat mounting bracket
Silicon sealant
around
mounting
bracket
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