I Combination Units Installation Instructions
soot and severe rust or corrosion and any obstructions due to
leaves, spider webs, etc. Clean as required.
Cooling Season Checks (Monthly)
Condenser Coil
Keep the condenser inlet and outlet area clean and free of leaves,
grass clippings or other debris. Grass should be kept short in front
of the condenser inlet. Shrubbery MUST be trimmed back so it is
no closer than 30 inches to unit.
Condensate Drain
Check for condensate drainage. Clean as required.
NOTE: When unit isoperating in cooling mode under high humid-
ity ambient conditions, condensate can form in the burner
compartment and may drip from front of the compartment. This
condition is NOT harmful to unit.
Annual Maintenance and Inspection
2. Remove the four screws securing the blower motor hous-
ing. If unit has a support bracket, remove the two screws
securing the bracket.
3. Remove the two red wires attached to the limit switch.
4. Slide entire housing toward you. This will allow easier ac-
cess to the speed tap block, motor, and wires.
5. After access, replace all wires, screws, and connections.
Motor removal and replacement
The blower motor may be replaced while accessing it using meth-
od 1. To replace motor, reach behind blower housing and locate
blower wheel set nut. Loosen set nut, all wires from motor, and
four pins on mounting cradle. Pull motor towards you. To replace
motor, reverse this procedure.
Method 2
This method is required to replace or repair blower wheel, blower
housing, or any unreachable components behind blower assem-
bly.
1. Repeat steps 1 through 4 in method 1.
Electrical shock hazard.
Turn off electric power supply at disconnect switch or
service panel before removing any access or service
panel from unit.
Failure to follow this warning can result in property
damage, personal injury, and/or death.
2.
3.
Remove all screws around rim of unit top, (except screws
which are inaccessible because of proximity to structure).
Raise unit top at corner of unit closest to blower at least 2"
and place a sturdy brace at least 2" thick between top and
unit corner. See FIGURE 20. A 2X4 piece of wood is ideal
for this.
4. Disconnect al! wires from housing and slide housing out of
unit. Reverse this process to reinstall.
FIG uRE 20 ProppedBI°werAcceSSwith2x4Sh°wing Lid
The annual inspection should include lubrication and cleaning as
required to ensure efficient operation of the unit. To simplify ac-
cess, remove all access panels and the top from the unit if pos-
sible.
Condenser Fan Motor
Oil the condenser fan motor after five years of operation and every
five years thereafter.
Use SAE 10W30 motor oil. To oil, remove the hole plugs from the
motor end bells and add several drops (approximately 1/2 tea-
spoonful) of oil with a squeeze type, flexible tube oiler. Replace
hole plugs after oiling. Do not over oil.
Clean the surrounding area and the condenser and evaporator
coils. Use caution to avoid damage to coi! fins.
Blower Motor Access
Refer to NO TAG for a view of blower motor and compartment.
Method 1
This method allows you to work on the motor and housing while
still in the unit. The blower motor can be replaced with this method,
but some may prefer to work on the housing assembly separately.
If this is your preference, use method 2.
1. Remove the blower access panel
Speed Taps
After determing necessary CFM and speed tap data on from tech
data label on the unit or in the Technicallnformation Manualfollow
the steps below to change speeds.
1. Refer to FIGURE 21 below and locate the speed tap block
on blower motor.
The yellow lead MUST always be connected to the speed
tap block atthe common quick connect terminal. The termi-
nal is identified as COM. Also, this is the only lead which is
1 ,
3/16" wide. All other quick connects are /4' wide.
50901 110202 [_[]
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