Reznor, Photon, Installation Manual, EN 2021-04, D301310 Page No 35 of 52
MS
Photon 120 gas valve inlet flange assembly
7. Refit gas valve in reverse order ensuring the
o-ring is fitted between the gas valve and
venturi.
8. Follow start up and commissioning
procedures.
Venturi cleaning and replacement
1. Clean the venturi inlet with a lint free cloth.
2. For replacement follow steps 1 to 5 from
gas valve replacement.
3. Separate the venturi from the
combustion fan by removing the fixings
(2 screws models 10-70 and 6 screws
models100-120 as per the photographs
shown under gas valve replacement).
Photon 10-70 venturi
Photon 100 venturi
O ring
Throttle
Screw
Fixing
Screws
Throttle
Screw
Photon 120 venturi
4. Before fitting new venturi, ensure throttle
screw is fully closed (turn throttle clockwise
for models 10-70 and anticlockwise for
model 100. Do not overtighten. Model
120 has the throttle integrated into the gas
valve.
5. Replace cork gasket (models 10-70)
or o-ring (models 100-120) between
combustion fan and venturi.
O-ring
Gasket
Photon 10-70 combustion fan
Photon 100-120 combustion fan
6. Refit remaining items in reverse order.
7. Follow start up and commissioning
procedure.
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