2
NOTES:
1. Symbols are electrical
representation only.
2. Compressor and fan motor
furnished with inherent
thermal protection.
3. To be wired in accordance
with National Electric
N.E.C. and local codes.
4. N.E.C. class 2, 24 V circuit,
min. 40 VA required,
60 VA on units installed
with LLS.
5. Use copper conductors
only. Use conductors
suitable for at least
75ºC (167ºF).
6. Connection for typical
cooling only thermostat.
For other arrangements
see installation instructions.
7. If indoor section has a
transformer with a
grounded secondary,
connect the grounded
side to the BRN/YEL lead.
8. If any of the original wire,
as supplied must be
replaced, use the same or
equivalent wire.
9. Check all electrical
connections inside control
box for tightness.
10. Do not attempt to operate
unit service valves have
been opened.
11. Do not rapid cycle
compressor.
Compressor must be off
3 minutes to allow
pressures to equalize
between high and low
side before starting.
12. It is imperative to connect
3Ø field power to unit with
correct phasing. The
Phase Rotation Monitor
will not allow the contactor
to be energized if the
phasing is not correct. If
phasing is reversed,
simply inter change any
two of the three power
connections on field side.
CONNECTION DIAGRAM
SCHEMATIC DIAGRAM (LADDER FORM)
1. Compressor damage may occur if system is
over charged.
2. This unit is factory charged with R-410A in
accordance with the amount shown on the
rating plate. The charge is adequate for most
systems using matched coils and tubing not
over 15 feet long. Check refrigerant charge
for maximum efficiency. See Product Data
Literature for required Indoor air Flow Rates
and for use of line lengths over 15 feet.
3. Relieve pressure and recover all refrigerant
before system repair or final disposal. Use all
service ports and open all flow-control
devices, including solenoid valves.
4. Never vent refrigerant to atmosphere. Use
approved recovery equipment.
335874-101 REV.A
* MAY BE FACTORY INSTALLED
LEGEND
FACTORY POWER WIRING
FACTORY CONTROL WIRING
FIELD CONTROL WIRING
FIELD POWER WIRING
COMPONENT CONNECTION
FIELD SPLICE
JUNCTION
CONT
CAP
*CH
*CHS
COMP
*CTD
*HPS
IFR
*LLS
*LPS
OFM
PRM
CONTACTOR
CAPACITOR (DUAL RUN)
CRANKCASE HEATER
CRANKCASE HEATER SWITCH
COMPRESSOR
COMPRESSOR TIME DELAY
HIGH PRESSURE SWITCH
INDOOR FAN RELAY
LIQ LINE SOLENOID VALVE
LOW PRESSURE SWITCH
OUTDOOR FAN MOTOR
PHASE ROTATION MONITOR
CAUTION
OFM
208/230 3Ø
OR
460 3Ø
POWER
SUPPLY
GNDEQUIP
L1
L3
*LPS
BLU/PNK
* CTD
*HPS
INDOOR BLOWER MOTOR
EXTERNAL
POWER
SUPPLY
24 V
(NOTE #3)
R
G
Y
BRN/YEL
YEL/PNK
BLU/PNK
YEL/PNK
*LLS
BLK
BLK
LOGIC
T1 T3
T2
C
R
T2
T1
T3
BLK
YEL
YEL
BLK
YEL
CAP
COMP
* CH
IFR
L2
RED or BLK
RED or BLK
BRN
L1
EQUIP
GND
*LPS
* CTD
*LLS
IFR
INDOOR
THERMOSTAT
Y
G
R
C
R
EXTERNAL POWER SUPPLY 24 V
LOGIC
T1 T3
T2
L2
CONT
*CHS
BLK
CAP
COMP
T3
T1
T2
L3
OFM
BLU
INDOOR THERMOSTAT (NOTE #6)
VIO
BLK
BRN/YEL
BLU
L3
L1
L2
CONT 24 COM
PRM
L3
L1
L2
PRM
YEL/BLU
BRN/YEL
BLU
BLK
YEL
OFF: NO 24VAC
ON: OK
FLASH: PHASE PROBLEM
NOTE
*HPS
PRM LED INDICATOR
PRM
CONT
24V
COM
*CH
*CHS
CONT
11
21
23
13
11
21
CONT
23
13
CONT
CONDENSING UNIT CHARGING INSTRUCTIONS
For use with units using R-410A refrigerant
COOLING ONLY
CHARGING PROCEDURE
1. Only use sub cooling charging method
when OD ambient is greater than 70ºF
and less than 100ºF, indoor temp is
greater than 70ºF and less than 80ºF,
and line set is less than 80 ft.
2. Operate unit a minimum of 15 minutes
before checking the charge.
3. Measure liquid service valve pressure by
attaching an accurate gauge to the
service port.
4. Measure the liquid line temperature by
attaching an accurate thermistor type or
electronic thermometer to the liquid line
near the outdoor coil.
5. Refer to unit rating plate for required
subcooling temperature.
6. Find the point where the required sub-
cooling temperature intersects the
measured liquid service valve pressure.
7. To obtain the required subcooling
temperature at specific liquid line
pressure, add refrigerant if liquid line
temperature is higher than indicated.
When adding refrigerant, charge in liquid
form using a flow restricting device into
suction service port. Recover refrigerant
if temperature is lower. Allow a tolerance
of +/- 3ºF.
REQUIRED LIQUID LINE TEMPERATURE
Required Subcooling
Temperature (ºF)
Liquid Pressure
at Service
Valve (psig)
68
10
12 14
16
251
259
266
274
283
291
299
308
317
326
335
345
354
364
374
76 74 72 70 68
78 76 74 72 70
80 78 76 74 72
82 80 78 76 74
84 82 80 78 76
86 84 82 80 78
88 86 84 82 80
90 88 86 84 82
92 90 88 86 84
94 92 90 88 86
96 94 92 90 88
98 96 94 92 90
100 98 96 94 92
102 100 98 96 94
104 102 100 98 96
384
395
406
416
427
439
450
462
474
106 104 102 100 98
108 106 104 102 100
110 108 106 104 102
112 110 108 106 104
114 112 110 108 106
116 114 112 110 108
118 116 114 112 110
120 118 116 114 112
122 120 118 116 114
78
80
82
84
86
88
90
92
94
96
98
100
102
104
106
108
110
112
114
116
118
120
122
124
Fig. 2 – Wiring Diagram — Model size 2--1/2 -- 5 tons, 208/230--3 and Model size 3 -- 5 tons, 460/3
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