MN702GE 060320
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2. Pre-fire inspection • preparation
(continued)
Installing the burner/appliance in a space that does not
provide enough air for combustion and ventilation can
result in severe personal injury, death or substantial
property damage. Follow all applicable codes and
guidelines below to ensure space has sufficient air
openings.
Exhaust fans and negative pressure conditions —
Isolate the boiler room from areas subject to negative
pressure. Size combustion air openings to ensure
neutral air pressure in the boiler room whenever the
burner operates.
Make sure the space provides enough ventilation
to prevent overheating of the appliance, burner and
controls. If there is risk of overheating, you must install
ventilation air openings sized large enough to provide
air for cooling the equipment. Failure to provide ven-
tilation can result in severe personal injury, death or
substantial property damage.
The space and combustion air supply must not contain
corrosive contaminants, such as laundry products,
paints, varnishes or other chemicals.
Removing the combustion head
assembly
1.
Shut off the burner.
2.
Remove the four gas orifice spuds from the manifold (Figure 4).
3.
Remove the two housing cover locking screws and swing the housing
open.
4.
Remove the combustion head assembly and inspect as needed.
Figure 4
Gas orifice location
Gas orifice spuds
(non-directional, 4 total)