NORMAL MAINTENANCE
CAUTION: Prior to any of the following maintenance proce-
dures, shut off all power to the unit to prevent
personal injury.
Periodic maintenance normally consists of changing or
cleaning filters and (under some conditions) cleaning the main
burners.
FILTERS - Inspect once a month. Replace disposable or clean
permanent type as necessary. DO NOT replace permanent type
with disposable.
MOTORS - Indoor fan and outdoor fan motors are permanently
lubricated and require no maintenance. Ventor motor is factory
lubricated for an estimated 10 year life.
OUTDOOR COIL - Dirt should not be allowed to accumulate on
the outdoor coil surface or other parts in the air circuit. Cleaning
should be as often as necessary to keep coil clean. Use a brush,
vacuum cleaner attachment, or other suitable means. If water
is used to clean coil, be sure power to the unit is shut off prior
to cleaning.
NOTE: Exercise care when cleaning the coil so that the coil fins
are not damaged.
Do not permit the outdoor air discharge to be ob-
structed by overhanging structures of shrubs.
BURNER & PILOT - Periodically (at least annually at the
beginning of each heating season) make a visual check of the
pilot and main burner flame. If necessary, adjust main burner
primary air shutters so that no yellow flame is observed as
explained under “BURNER AIR SHUTTER ADJUSTMENT”. If
it is not possible to adjust for the proper flame, the burners may
need cleaning.
TO CLEAN BURNERS - Remove them from the furnace as
explained in “Burner Instructions”. Clean burners with hot water
applied along top of the burner.
COMBUSTION AIR DISCHARGE - Visually inspect discharge
outlet periodically to make sure that the buildup of soot and dirt
is not excessive. If necessary, clean to maintain adequate
combustion air discharge.
CLEANING FLUE PASSAGES AND HEATING
ELEMENTS
With proper combustion adjustment the heating element of a
gas fired furnace will seldom need cleaning. If the element
should become sooted, it can be cleaned as follows:
1. Remove the burner assembly as outlined in “BURNER
INSTRUCTIONS”.
2. Remove the roof over the gas heat section.
3. At the top front of the heat section, remove the screws
holding the top of the flue collector box. Carefully remove
the top of the flue collector box without ripping the adjacent
insulation.
4. On the inside of the flue collector box, remove the flue baffle
from the tube interiors.
5. Using a wire brush on a flexible wand, brush out the inside
of each heat exchanger from the burner inlet and flue outlet
ends.
6. Brush out the inside of the flue collector box and the flue
baffles.
7. Run the wire brush down the vent tube from the flue collector
end.
8. If soot build-up is particularly bad, remove the vent motor
and clean the wheel and housing. Run the wire brush down
the flue extentions at the outlet of the vent housing.
9. After brushing is complete, blow all brushed areas with air
or nitrogen. Vacuum as needed.
10. Replace parts in the order they were removed in Steps 1
through 4.
11. When replacing the top of the flue collector box, be careful
so as not to tear the adjoining insulation.
12. Assure that all seams on the vent side of the combustion
system are air tight. Apply a high temperature (+500
°
F)
sealing compound where needed.
MAINTENANCE
530.18-N10Y
Unitary Products Group
17
