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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL
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15.2 Burner Compartment
15.2.1 Burner Injectors
Remove flexible
air duct from spigot
Viewing port
for flame probe
Flame Probe
Burner
Compartment
Cover
Ignition Electrode
Remove screws and
pull off burner cover
The burner compartment is a sealed
compartment. Following any work,
re-seal the compartment with the
gas pipe rubber seal fully in place
and all screws fitted and tight.
NOTE: Flexible duct only applies for
model UHDS.
MODEL UHD[X][S] 75 UHD[X][S] 100 UHD[X][S] 125
Orifice Quantity 5 6 7
Natural Gas (G20)
Orifice Marking 49 46 46
P/N 91930049 91930046 91930046
Propane (G31)
Orifice Marking 1.15 mm 1.25 mm 1.25 mm
P/N 91930115 91930125 91930125
Ensure gas tight fitting
of injectors.
Ensure correct alignment
with burners.
Ensure all pipe joints are
gas tight.