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PLUG
CAP
COLLECTOR BOX
DRAIN TUBE (BLUE &
WHITE STRIPED)
INDUCER HOUSING
(MOLDED) DRAIN
T
UBE (BEHIND
COLLECTOR BOX
DRAIN TUBE)
COLLECTOR BOX
TUBE (PINK)
COLLECTOR BOX
DRAIN TUBE (BLUE)
COLLECTOR BOX
TUBE (GREEN ,
ROUTES BEHIND
INDUCER)
FIELD- INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE
COUPLING (LEFT
DRAIN OPTION)
FIELD- INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE
FIELD- INSTALLED
FACTORY- SUPPLIED
½ -IN. CPVC STREET
ELBOWS (2) FOR
LEFT DRAIN OPTION
FIELD- INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE
COUPLING (LEFT
DRAIN OPTION)
CONDENSATE
TRAP
A07274
Fig. 5 -- Factory--Shipped Upflow Tube Configuration ( Shown with Blower Access Panel R emoved)
Clean blower motor and wheel as follows:
1. Turn off electrical supply to furnace.
2. Remove main furnace door and blower access panel.
3. Disconnect wires
All f actory wires can be left connected, but field
thermostat connections may need to be disconnected
depending on their length and routing.
4. Position control box, transformer, and door switch
assembly to right side of furnace casing.
5. If condensate trap is located in left -- or right-- hand side of
furnace casing, proceed to item 6. Otherwise remove trap
and tubing as described below (See Fig. 5.):
a. Disconnect field drain connection from condensate trap.
b. Disconnect drain and relief port tubes from condensate
trap.
c. Remove condensate trap from blower shelf.
6. Remove screws securing blower assembly to blower shelf
and slide blower assembly out of furnace. De tach ground
wire and disconnect blower motor harness plugs from
blower motor.
NOTE: Blower wheel is fragile. Use care.
7. Clean blower wheel and motor by using a vacuum with
soft brush attachment. Be careful not to disturb balance
weights (clips) on blower wheel vanes. Do not bend wheel
or blades as balance will be affected.
8. If greasy residue is present on blower wheel, remove
wheel from the blower housing and wash it with an
appropriate degreaser. To remove wheel:
a. Markblower wheellocation on shaft beforedisassembly
to ensure proper reassembly.
b. Loosen setscrew holding blower wheel on motor shaft.
NOTE: Mark blower mounting arms and blower housing so
each arm is positioned at the same hole location during
reassembly.
c. Mark blower wheel orientation and cutoff plate location
to ensure proper reassembly.
d. Remove screws securing cutoff plate and remove cutoff
plate from housing.
e. Remove bolts holding motor mounts to blower housing
and slide motor and mounts out of housing.
f. Remove blower wheel from housing.
g. Clean wheelperinstructionsondegreasercleaner.Donot
get degreaser in m otor.
9. Reassemble motor and blower wheel by reversing items
8b through 8f. Ensure wheel is positioned for proper
rotation.
NOTE: Be sure to attach ground wire and reconnect blower
harness plugs to blower motor.
10. Reinstall blower a ssembly in furnace.
11. Reinstall condensate trap and tubing if previously
removed.
a. Reinstall condensate trap in hole in blower shelf.
b. Connect condensatetrapdrain tubes.See Fig.5 ortubing
diagram on main furnace door for proper tube location.
(1.) Connect1tube(blueorblueandwhitestriped)from
collector box.
(2.) Connect 1 tube (violet or unmarked) from inducer
housing.
(3.) Connect one tube (relief port, green or pink) from
collector box.
c. Connect field drain to condensate trap.
NOTE: Ensure tubes are not kinked or pinched, as this will
affect operation.
12. Reinstall control box, transformer, and door switch
assembly on blower shelf.
13. Reconnect wires.
a. Refer to furnace wiring diagram and connect thermostat
leads if previously disconnected. (See Fig. 21.)
58MVC