24ABB3
Base
t
Series Air Conditioner with Puron
r
1---1/2 to 5 Nominal Tons
Single and Three Phase
Wiring Diagrams
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. When start relay and start capacitor are installed, start thermistor is not used.
9. CH not used on all units.
10. If any of the original wire, as supplied must be replaced, use the same or equivalent wire.
11. Check all electrical connections inside control box for tightness.
12. Do not attempt to operate unit until service valves have been opened.
13. Do not rapid cycle compressor. Compressor must be off 3 minutes to allow pressures to equalize
between high and low side before starting.
14. Wire not present if HPS, LPS or CTD are used.
CONNECTION DIAGRAM
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.
330440-101 REV. F
* 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
*DTS
*HPS
IFR
*LLS
*LPS
OFM
*SC
*SR
*ST
CONTACTOR
CAPACITOR (DUAL RUN)
CRANKCASE HEATER
CRANKCASE HEATER SWITCH
COMPRESSOR
COMPRESSOR TIME DELAY
DISCHARGE TEMP SWITCH
HIGH PRESSURE SWITCH
INDOOR FAN RELAY
LIQ LINE SOLENOID VALVE
LOW PRESSURE SWITCH
OUTDOOR FAN MOTOR
START CAPICATOR
START RELAY
START THERMISTOR
CAUTION
BLK
or
RED
*CH
RED or BLK
BLK
YEL
YEL
COMP
BLK
BLU
CAP
YEL
BLU
BLU
YEL
*ST
BRN
*SR
OFM
BRN
BRN/YEL
BLK
BLK
208/230 1Ø
POWER
SUPPLY
GND
EQUIP
+t
L1
L2
H
C
F
YEL
VIO
YEL/ BLU
(NOTE #14)
(NOTE #9)
(NOTE #8)
INDOOR BLOWER MOTOR
EXTERNAL
POWER
SUPPLY
24 V
(NOTE #3)
INDOOR THERMOSTAT (NOTE #6)
R
G
Y
*LLS
BLK
BLK
1
2
5
S
C
R
C
R
*SC
*CHS
BLK
*LPS
*DTS
BLK
BLK
*CTD
LOGIC
T1
T3
T2
YEL/PNK
BLU/PNK
BLK
YEL/ BLU
BRN/YEL
*HPS
YEL/PNK
BLU/PNK
CONT
11
21
23
23
SCHEMATIC DIAGRAM (LADDER FORM)
L1
*SR
*SC
H
COMP
*ST
C
F
CAP
OFM
L2
5
2
1
*LPS
* CTD
*DTS
*LLS
IFR
THERMOSTAT
INDOOR
Y
G
R
C
R
EXTERNAL POWER SUPPLY 24 V
(NOTE #14)
+t
LOGIC
T1
T3
T2
CONT
S
C
R
*HPS
EQUIP
GND
*CH
*CHS
11
21
CONT
CONT
23
23
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 subcooling
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.
CONDENSING UNIT CHARGING INSTRUCTIONS
For use with units using R-410A refrigerant
REQUIRED LIQUID LINE TEMPERATURE
Required Subcooling
Temperature (ºF)
Liquid Pressure
at Service
Valve (psig)
6
8
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. 1 – Wiring Diagram — Model sizes 1--1/2 -- 5 tons, 208/230--1