Reznor, Photon, Installation Manual, EN 2021-04, D301310 Page No 39 of 52
MS
3. Once removed unscrew the 2 fixings
with a 10mm socket to release the probe
mounting bracket.
4. Pull probe mounting bracket away from
the burner chamber to extract the burner
probes.
5. The burner probe assembly can now be
removed from the heater.
6. Review the condition of the probes. Light
oxidation can be removed with a fine
abrasive paper.
7. Measure the length of each probe and
check against the dimensions given below.
If probes are corroded or damaged in any
way, they will need to be replaced.
Probe mounting
bracket fittings x2
Withdraw
probe mounting
bracket from
chamber
Flame probe
Length of probe =
46.55mm overall
32.95mm to angle
13.79 mm angle to tip
Tip deflection away from 0°
= 27°
8. Check spark gap against dimensions
below, if necessary, adjust using long nose
pilers. Be careful not to crack the ceramic
sleeve.
9. To replace the probe, unscrew the 7mm
nut to release the probe from the bracket
and change.
10. Check condition of probe bracket gasket
and replace if necessary.
11. Refit all parts in reverse order.
12. Follow start up and commissioning
procedure.
Spark probe
Length of probe =
78.5mm long probe
42.3mm short probe
3.5±0.5 mm gap between
probes
Angle of probe = 20°
7mm nut x2
Probe mounting
bracket gasket x2
