Carrier 38CKP, Installation And Start-Up Instructions Manual, Page: 2 / 8

Step 4—Make Piping Connections
Outdoor units may be connected to indoor sections using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 50 ft (15.24m),
or 20 ft vertical differential, consult Long-Line Application
Guideline which is available at your local distributor.
NOTE: In some cases, noise in the living area has been traced to
gas pulsations from improper installation of equipment.
INSTALLATION RECOMMENDATIONS
1. Locate unit away from windows.
2. Ensure that vapor- and liquid-tube diameters are appropriate to
capacity of unit. (See Table 1.)
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
4. Leave some slack between structure and unit to absorb
vibration.
5. When passing refrigerant tubes through the wall, seal opening
with RTV or other pliable silicon-based caulk. (See Fig. 3.)
6. Avoid direct tubing contact with water pipes, duct work, floor
joists, wall studs, floors, and walls.
7. Do not suspend refrigerant tubing from joists and studs with a
rigid wire or strap that comes in direct contact with tubing.
(See Fig. 3.)
8. Ensure that tubing insulation is pliable and completely sur-
rounds vapor tube.
9. When necessary, use hanger straps which are 1 in. (25mm)
wide and conform to shape of tubing insulation. (See Fig. 3.)
10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
If refrigerant tubes or indoor coil is exposed to atmospheric
conditions, it must be evacuated to 500 microns to eliminate
contamination and moisture in the system.
Fig. 2—Unit Reference Drawing
UNITSIZE
A/B C D E F G
In. mm In. mm In. mm In. mm In. mm In. mm
018 18 457.2 3 76.2 15 381.0 10-3/16 258.8 5/8 15.9 25-15/16 658.8
024 22-1/2 571.5 3-11/16 93.6 18-1/8 460.4 14-3/8 365.1 5/8 15.9 21-15/16 557.2
036 22-1/2 571.5 3-11/16 93.6 18-1/8 460.4 14-3/8 365.1 3/4 19.1 33-15/16 862.0
048 30 762.0 6-1/2 165.1 23-1/2 596.9 20 508.0 7/8 22.2 27-15/16 709.6
060 30 762.0 6-1/2 165.1 23-1/2 596.9 20 508.0 7/8 22.2 39-15/16 1014.4
A97003
AIR DISCHARGE
F
DIA SUCTION LINE CONN
FIELD CONTROL
SUPPLY CONN
7/8 IN.
DIA (22.22) HOLE
AIR
DISCHARGE
AIR
DISCHARGE
AIR IN
AIR IN
NOTES:
FIELD POWER SUPPLY CONN
7/8 IN.
DIA (22.22) HOLE WITH
1 1/8 IN. DIA (28.57) KNOCKOUT
AND 1 3/8 IN. DIA (34.92) KNOCKOUT
AIR IN
AIR IN
RATING LABEL
3/8 IN.
DIA (9.53)
LIQUID LINE CONN
E
D
C
B
G
A
1. Allow 30 in. (762 mm) clearance to service end of unit, 48 in. (1219 mm) above
unit, 6 in. (152 mm) on one side, 12 in. (305 mm) on remaining side, and
24 in. (610 mm) between units for proper airflow.
2. Minimum outdoor operating ambient in cooling mode is 55
°
F (12.8
°
C),
MAX. 125
°
F (51.7
°
C).
3. Dimensions in parentheses are in millimeters.
4. Series designation is the 13th position of the unit model number.
2