035-16626-000-E-0103
Unitary Products Group
17
MAINTENANCE
INDOOR COIL
Do not allow dirt to accumulate on the indoor coil or
other parts of the supply/return air circuit. Clean as
often as necessary to assure good system perfor-
mance. Use a brush vacuum cleaner attachment or
other suitable means.
If the coil becomes extremely dirty, it may be neces-
sary to use an industrial grade detergent and a hose to
clean the finned surfaces. This is recommended to
prevent any loss in capacity and efficiency.
FILTERS
The filters must be replaced as often as necessary to
assure good air flow and filtering action. Clean filters
will prevent any loss in capacity and efficiency.
Refer to the unit drawing in Figures 17 and 18 for the
location of the filter access panel.
DRAIN PAN
The condensate drain pan should be inspected regu-
larly to assure proper drainage.
LUBRICATION
The bearings for the blower shaft and the blower motor
are permanently lubricated and should not require any
additional lubricant.
BELTS
Maintain belt tension to extend belt life. Replace the
signs of failure begin to appear.
TABLE 11: TYPICAL FIELD WIRING
Y1
W
1
Y2
C
R
X
O
HC
O
HR
G
W
1
Y2
Y1
R
C
X
R
C
Y1
Y2
O
W
1
X
G
TB1
TB2
TERMINALS ON:
Supply Air Blower Motor
Contactor 10M
OR
Terminal Block Electric
Heat Control Box
GROUND SCREW
"Heat Pump Only" Units
GROUND LUG
Units with Electric
Heat Accessory
3 PHASE LINE VOLTAGE POWER SUPPLY
Refer to electrical data to size the power
wiring, disconnect switch and overcurrent
protection*.
USE COPPER CONDUCTORS ONLY
TERMINALS ON
COMPRESSOR
CONTACTORS 1M &3M
GROUND
LUG
INDOOR UNIT
OUTDOOR UNIT
TERMINALS ON HEAT
PUMP THERMOSTAT
1
1
Control wiring (24 volt)
refer to electrical data
to determine the proper
wire size.
* All outdoor units and all heat pumps only
indoor units require dual elements, time
delay fuses. Circuit breakers can be used
in lieu of fuses for indoor units with an
electric heat accessory.
WIRE IN ACCORDANCE WITH LOCAL
AND NATIONAL ELECTRICAL CODES
1
Only required when using an
electric heat accessory.
