House Air Blower - Thermo Pride MHA1-50N Installation And Service Manual

All installations and services must be performed by qualified service personnel.
2. Chimney/vent pipe - Vertically vented units - Remove flue pipe from inducer
and inspect for restriction, loose joints, carbon build-up and condensation. Clean
vent and chimney if necessary and replace or repair any degraded vent, vent
connector or chimney damage found. For sidewall vented units refer to the
manufacturer's maintenance instructions for the sidewall venter.
3. Burners - If it appears that material is accumulating in the burner box the box
and burners can be vacuumed. If necessary, the burners box assembly can be
removed from the separator panel, by removing the screws behind the 1" holes
near the top of the burner box, and the one screw in the flange under the burner
box.
4. Inducer Blower Assembly - Inspect pressure switch tubing connections and
inspect inducer blower/assembly for corrosion, warpage, deterioration and
carbon build-up. If necessary, clean housing and blower wheel with a damp
cloth. Vacuum to remove any lint or dust from motor assembly. The inducer
gasket and the collector box gasket must be replaced if they show any sign of
having been damaged.
5. Clean all furnace markings as necessary and verify that all are still legible. Any
illegible or missing markings must be replaced. Replacements can be obtained
by contacting Thermo Products.
Once all components are cleaned, they must be re-installed to their factory-
produced state. Any seals or joints in the flue system, which have been removed
or loosened, must be reconnected and sealed if necessary. Do this in
accordance with the installation instructions. (Section II, J, of this manual for
vertically vented units, or Section II, K, of this manual for sidewall vented units).
NOTICE: After cleaning the furnace, reference the burner adjustment section of this
manual. Check for operation, proper combustion and no gas leakage according to
the procedure outlined in Section III, of this manual, Burner and Adjustment.
Observe the burner flame illustrations and follow the adjustment procedures if
proper flame(s) are not present.
C. House Air Blower
Check and clean the blower wheel, housing, and compartment with a vacuum.
Check the motor nameplate and follow motor manufacturer instructions for
lubrication, if required.
IMPORTANT: Some motors are permanently lubricated and should not be
oiled. See motor nameplate for specific instructions.
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