Carrier 38CKC Installation Instructions Manual page 3

CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper unit
operation.
This unit utilizes R- -22 refrigerant. Use only R- -22
refrigerant when servicing this unit. DO NOT under any
circumstances use R- -410A refrigerant in this system.
Outdoor units may be connected to indoor section using accessory
tubing package or field supplied refrigerant- -grade tubing of correct
size and condition. For tubing requirements beyond 80 ft (24.4 m),
consult Residential Piping and Long- -Line Guideline. Connect
tubing to fittings on outdoor unit vapor and liquid service lines.
(See Table 1.)
If refrigerant tubes or the indoor coil are exposed to atmospheric
conditions for longer than 5 minutes they must be evacuated to 500
microns to eliminate contamination and moisture in system.
Table 1—Refrigerant Connections and Recommended Liquid
and Vapor Tube Diameters (in.)
Liquid
UNIT SIZE
Connect
Diameter Diameter
018, 024
030, 036
3/8
042, 048
060
Note:
1. Tube diameters are for lengths up to 80 ft (24.38 m) horizontal ro 20 ft
(6.10 m) vertical differential. For tubing lengths greater than 80 ft,
(24.38 m) consult the Residential Split System Long---Line Guideline.
Maximum liquid line size is 3/8 in. including long---line applications.
2. Do not apply capillary ---tube indoor coils to these units.
Outdoor Unit Connected To Factory Approved Indoor Unit
Outdoor unit contains correct system refrigerant charge for
operation with indoor unit of same size when connected by 15 ft
(4.57 m) of field supplied or factory accessory tubing. Check
refrigerant charge for maximum efficiency.
Sweat Connection
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
Service valves must be wrapped while brazing in a heat
sink material, such as a wet cloth.
Use refrigerant grade tubing. Service valves are closed from factory
and ready for brazing. After wrapping service valve with a wet
cloth, tubing set can be brazed to service valve using industry
accepted methods and materials. Consult local code requirements.
Refrigerant tubing and indoor coil are now ready for leak testing.
This check should include all field and factory joints.
Evacuate Condenser, Line Set, and Indoor Coil
CAUTION
!
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product damage.
Never use the outdoor unit compressor as a vacuum pump.
Doing so may damage the compressor.
Rated Vapor
(up to 80 ft. / 24.38 m)
Tube Connect Tube
Diameter Diameter
3/8 5/8
3/8 3/4
3/8
7/8 7/8
7/8 1 ---1/8
Condenser, line set, and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. If deep
vacuum equipment is not available, the alternate triple evacuation
method may be used by following the specified procedure.
If vacuum must be interrupted during the evacuation procedure,
always break vacuum with dry nitrogen.
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper unit
operation..
This unit is filled with a Nitrogen charge. Prior to starting this
unit, evacuate to 500 microns and charge with refrigerant
listed on rating label. Purge nitrogen before connection to
vacuum pump.
MAKE ELECTRICAL CONNECTIONS
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or
death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag switch
with a suitable warning label.
Do not supply power to unit with compressor terminal box
cover removed.
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do not
install unit in system where voltage or phase imbalance (3 phase)
may fluctuate above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and unit.
NOTE: Install branch circuit disconnect of adequate size per NEC
to handle unit starting current. Locate disconnect within sight from
and readily accessible from unit, per Section 440- -14 of NEC.
Route Ground And Power Wires
Remove access panel to gain access to unit wiring. Extend wires
from disconnect through power wiring hole provided and into unit
control box.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The unit cabinet must have an uninterrupted or unbroken
ground. The ground may consist of electrical wire or metal
conduit when installed in accordance with existing electrical
codes.
Connect Ground And Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 3
3