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507296-02C Page 3 of 12mrcool.com
Figure 1. Rigging Unit
Figure 2. Typical Field Wiring
CAUTION
Unpacking
Carefully remove outer packaging material and discard.
corner and seal the shipping openings in the base from
prevent air leakage during unit operation.
Service Access
Access to all serviceable components is provided by four
WARNING
Clearances
All units require certain clearances for proper operation
and service. Refer to Table 1 for the minimum clearances
proper unit operation.
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet.
Table 1. Minimum Clearances
Clearance to
Combustibles
Clearance for
Service Access
Front of unit
24 in.
Back of unit
24 in.
Right side
24 in.
Base of unit
Top of unit 48 in.
Compressor
adjusted and ready for operation. Do not loosen
compressor mounting bolts.
Electrical Wiring
the installer. Refer to the unit rating plate for maximum
REDUCE
TO
6.00
REDUCE
TO
W1
C
L
R
O
Y1
FAN
O-OUT
LO-PS
DF
HI-PS
COMMON
Y1 OUT
2
2
24 V
Y
W2
RED
YEL
BLU
WHT
GRN
ORN
2
W1 & W2 CAN BE USED TO STAGE
ELECTRIC HEAT ACCESSORY ON
15 & 20KW MODELS
5, 7.5 & 10KW HEATER ACCESSORIES
FUNCTION OFF W1 ONLY.
WHT
DEFROST
CONTROL
P-6
P-5
G
W1
C R O
THERMOSTAT
537663-01
CONNECTION DIAGRAM, HEAT PUMP - PACKAGED
NOTE:
IF ANY OF THE ORIGINAL
WIRE IS REPLACED THE
SAME SIZE AND TYPE WIRE
MUST BE USED.
USE COPPER CONDUCTOR
ONLY, MIN 75 C WIRE
CONNECTION MUST BE JUMPERED
WHEN PRESSURE SWITCH IS NOT USED.
LINE VOLTAGE FIELD INSTALLED
WARNING-
ELECTRIC SHOCK HAZARD. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
Note: Because the Pressure Switches are monitored only when "Y1" (Input) is active, the code
for pressure switch open will not be seen when "Y1" is off. Instead, the "Normal Operation" or
Also, when a pressure switch opens and caused a short cycle lockout, the pressure switch-open
code will be seen until it closes, then the short cycle lockout code will flash unless it has already
REV. VALVE
DEFROST
T'STAT
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