Electrical Wiring; Wiring Connections; Control Box Access - International comfort products CAC075 Installation Instructions Manual

Split System Condensers
Figure 5 - - Charging Chart
Reference Charge
1
UNIT Level R--22 Ounces
CAC075 245
CAC090 240
CAC120 384
CAE075 285
CAE090 328
NOTES: Outdoor units to matched with thermostatic expansion valve indoor units only.
1. Approximate charge level with recommended line sizes 25 feet in length.
2. Size in parenthesis is acceptable alternate line size.
3. Do not increase the suction line diameter for vertical suction risers any larger than what is shown.

Electrical Wiring

WARNING
Electrical Shock Hazard.
Shut off electric power at fuse box or service pan-
el before making any electrical connections.
Failure to shut off electric power can result in,
property damage, personal injury and/or death.
Refer to the unit rating plate for proper supply voltage.
For international models only: The unit should be wired
through a properly sized disconnect switch that opens all
poles.
APPROVED FOR USE WITH COPPER CONDUCTORS
ONLY. DO NOT USE ALUMINUM WIRE.
REFER TO UNIT RATING PLATE FOR CIRCUIT
PROTECTION.
Grounding
Permanently ground unit in accordance with the National
Electrical Code and local codes or ordinances. Use a cop-
per conductor of the correct size from the grounding termi-
nal in control box to a grounded connection in the service
panel or a properly driven and electrically grounded ground
rod.

Wiring Connections

Make all outdoor electrical supply (Line Voltage) connec-
tions with raintight conduit and fittings. Most codes require
a disconnect switch outdoors within sight of the unit.
Route Line Voltage wiring through entrance and through
hole in the bottom of the Control Box to connect to Contac-
tor and Ground Lug.
Route Low Voltage wiring through entrance ONLY and
make ALL low voltage connections to the low voltage pig-
tails in the area below the Control Box. The pigtail wires
have 600V insulation meeting approval for use in high volt-
age areas.
501 01 1504 00
Liquid Line Suction
2 3
Size Line Size
5/8" (1/2") 1--1/8"
5/8" (1/2") 1--1/8"
5/8" 1--1/8"
1/2" (5/8") 1--1/8"
5/8" (1/2") 1--1/8"
Min. Subcooling
Recommended Deg. F
10°
10°
10°
10°
10° Both Compressors
6° One Compressor
NOTE: The blue low voltage wire is 24vac common and is
grounded to the control box.
Use of Rigid Metal Conduit
It is recommended that wires be tied together or twisted to-
gether inside the conduit. This will minimize any buzzing
type sounds that could be produced with high current
loads, such as during starting. Under some conditions it
may be necessary to use a hard start kit to eliminate prob-
lem noises.

Control Box Access

Remove the four screws. Cover is notched so it will slide
out from under top edge of unit.
A/C Condenser Typical Low
Figure 6
Voltage Connections
Indoor
Thermostat
Y1 Y
Y2
W
W2
C
X B
G
R
R G
INDOOR
BLOWER
COIL
Installation Instructions
Acceptable
Subcooling Range
10° -- 18°
10° -- 15°
10° -- 15°
10° -- 18°
12° -- 20° Both Compressors
6° -- 14° One Compressor
(Compressor Contactor)
Outdoor Unit
Yellow (Y1)
Gray (Y2)
Red (Hot 24V)
Blue
(Common 24V)
BL
W
GAS
OR
FURNACE
7