Installation; Unpack Unit; Inspect Equipment - Carrier 38CKG Installation And Start-Up Instructions Manual

10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
NOTE: Avoid contact between tubing and structure
OUTDOOR WALL
CAULK
INSULATION
THROUGH THE WALL
HANGER STRAP
(AROUND VAPOR
TUBE ONLY)
1" MIN.
SUSPENSION
Fig. 3—Connecting Tubing Installation
When outdoor unit is connected to factory-approved indoor unit,
outdoor unit contains system-refrigerant charge for operation with
indoor unit of the same size when connected by 15 ft of
field-supplied or factory-accessory tubing. For proper unit opera-
tion, check refrigerant charge using charging information located
on control-box cover and/or in the Check Charge section of this
Instruction.
IMPORTANT: Maximum liquid-line size is 3/8-in. O.D. for all
residential applications including long line.
IMPORTANT: Always install a liquid-line filter drier. Refer to
Product Data Digest for appropriate part number. Obtain filter
driers from your local distributor or branch.

INSTALLATION

Step 1—Check Equipment and Job Site

UNPACK UNIT

Move to final location. Remove carton, taking care not to damage
unit.

INSPECT EQUIPMENT

File claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit-rating plate on unit-corner
panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.
Step 2—Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad,
tie-down bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit-mounting pattern in Fig. 4
to determine base-pan size and knockout-hole location.
On rooftop applications, mount on level platform or frame. Place
unit above a load-bearing wall and isolate unit and tubing set from
INDOOR WALL
LIQUID TUBE
VAPOR TUBE
JOIST
INSULATION
VAPOR TUBE
LIQUID TUBE
A94028
A
Dimensions (In.)
MINIMUM
UNIT SIZE MOUNTING PAD
DIMENSIONS
018, 024-C/G/W
18 X 18
018-CKS
030-042-C/G/W
22-1/2 X 22-1/2
024-036-CKS
048, 060-C/G/W
30 X 30
042-060-CKS
Fig. 4—Mounting Unit to Pad
structure. Arrange supporting members to adequately support unit
and minimize transmission of vibration to building. Consult local
codes governing rooftop applications.
Roof-mounted units exposed to winds above 5 mph may require
wind baffles. Consult Low-Ambient Guideline for wind-baffle
construction.
NOTE: Unit must be level to within ± 2° (± 3/8 in./ft) per
compressor manufacturer specifications.
Step 3—Clearance Requirements
When installing, allow sufficient space for airflow, wiring, refrig-
erant piping, and service. Allow 30-in. clearance to service end of
unit and 48 in. above unit. For proper airflow, a 6-in. clearance on
1 side of unit and 12 in. on all remaining sides must be maintained.
Maintain a distance of 24 in. between units. Position so water,
snow, or ice from roof or eaves cannot fall directly on unit.
On rooftop applications, locate unit at least 6 in. above roof
surface.
Step 4—Operating Ambients
The minimum outdoor-operating ambient in cooling mode is 55°F,
and the maximum outdoor-operating ambient in cooling mode is
125°F.
Step 5—Check Indoor AccuRaterT Piston
Check indoor-coil piston to see if it matches the required piston
shown on outdoor unit-rating plate. If it does not match, replace
indoor-coil piston with piston shipped with outdoor unit. The
piston shipped with outdoor unit is correct for any approved
indoor-coil combination.
2
"D. (9.53) TIEDOWN
3
⁄
8
KNOCKOUTS (2) PLACES
B
TIEDOWN KNOCKOUT LOCATIONS
A B
3 15
3-11/16 18-1/8
6-1/2 23-1/2
C
A94199
C
10-3/16
14-3/8
20