UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL
14.2 Burner Compartment
Burner
Compartment
Cover
Viewing port for flame probe
Flame Probe
Ignition Electrode |
Remove flexible air duct from spigot
Remove screws and pull off burner cover
The burner compartment is a sealed compartment. Following any work,
NOTE: Separated combustion model shown.
14.2.1 Burner Injectors
Inshot
Burners
Orifices 
Manifold
Mounting
Bracket Grommet
Manifold
Remove manifold
screws and pull
out manifold
Manifold
Unscrew
Orifices
Marking
Folded
Hem
Ensure gas tight fitting of injectors.
Ensure correct alignment with burners.
Ensure all pipe joints are gas tight.
MODEL | UHD[X][S][R] 75 | UHD[X][S][R] 100 | UHD[X][S][R] 125 |
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Orifice Quantity | 5 | 6 | 7 |
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Natural Gas (G20) |
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Orifice Marking | 49 | 46 | 46 |
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P/N | 91930049 | 91930046 | 91930046 |
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Propane (G31) |
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Orifice Marking | 1.15 mm | 1.25 mm | 1.25 mm |
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P/N | 91930115 | 91930125 | 91930125 |
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