Service manual

SECTION 15: REPLACEMENT PARTS
47 of 59
15.3 Burner Compartment for Models UHA[X][S] 300-400
Remove flexible
air duct from spigot
Remove
access plate
Remove screws and
pull off burner
compartment cover
Viewing port
for flame probe
Viewing port
for ignition electrode
Flame Probe
Burner
Compartment
Cover
Rubber Seal
Ignition Electrode
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 UHAS.
15.3.1
Screws
Manifold
Inshot
Burners
Orfices
Burner
Screws
Burner
venturi
Unscrew
Orfice
Manifold
Marking
Inshot
Burner
Ensure gas tight fitting of injectors.
Ensure correct alignment with burners.
Ensure all pipe joints are gas tight.
Burner Injectors for Models UHA[X][S] 300-400
MODEL UHA[X][S] 300 UHA[X][S] 350 UHA[X][S] 400
Orifice Quantity 12 14 14
Natural Gas (G20)
Orifice Marking 40 40 40
P/N 91930040 91930040
91930040
Propane (G31)
Orifice Marking 1.45 mm 53 53
P/N 91930145 91930053 91930053