Carrier 38QRA - Manual (Page 3)

A CAUTION
DO NOT BURY MORE THAN 36 IN. (914mm) OF RE­
FRIGERANT TUBING IN GROUND. If any section of
tubing is buried, there must be a 6-in.(152mm) vertical rise to
the valve connections on the outdoor unit. If more than the
recommended length is buried, refrigerant may migrate to
cooler buried section during extended periods of unit shut­
down, causing refrigerant slugging and possible compressor
damage at start-up.
Step 5—Make Piping Connections
Outdoor units may be connected to indoor sections using accessory
tubing package or field-supplied tubing of refrigerant grade,
correct size, and condition. The liquid- and vapor-tube diameters
can be determined by using Table 3. For tubing requirements
beyond 50 ft (15.24m), obtain information from your local
distributor.
If either refrigerant tubing or indoor coil is exposed to atmospheric
conditions for longer than 5 minutes, it must be evacuated to 1000
microns to eliminate contamination and moisture in the system.
Run refrigerant tubes as directly as possible, avoiding unnecessary
turns and bends. Suspend refrigerant tubes so they do not damage
insulation on vapor tube and do not transmit vibration to the
structure. Also, when passing refrigerant tubes through the wall,
seal opening so vibration is not transmitted to stmcture. Leave
some slack in refrigerant tubes between structure and unit to
absorb vibration.
OUTDOOR UNIT CONNECTED TO FACTORY APPROVED
INDOOR UNIT — Outdoor unit contains holding refrigerant
charge only. See Table 2 for correct system charge when con­
nected by 25 ft (7.62m) of field-supplied or factory accessory
tubing. Add charge as required to achieve correct total. For long
line application information, contact your local distributor.
Table 2—Refrigerant Charge
OUTDOOR
UNIT
PHASE CHARGE (LB)
018 1 4.25
024 1 4.75
030 1 6.00
036 1 7.00
036 3 11.63
048 1 &3 9.44
060 1 &3 11.75
Table 3—Refrigerant Connections and Recom­
mended Liquid and Vapor Tube Diameters (In.)
UNIT
SIZE
LIQUID VAPOR
Connect
Dia
Tube
Dia
Connect
Dia
Tube
Dia
018,024,030 3/8 3/8 5/8 5/8
036 3/8 3/8 3/4 3/4
048 3/8 3/8 7/8 7/8
060 3/8 3/8 7/8 1-1/8
Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50
ft, consult Long-Line Application Guideline.
REFRIGERANT TUBING — Connect tubing to fittings on out­
door unit vapor and liquid service valves. (See Fig. 2.) Remove
brass piston retainer. Insert outdoor piston shipped in bag with
indoor piston in the liquid service valve, replace brass piston
retainer and connect sweat adapter provided. (See Fig. 5.)
CARRIER CORP.
IN 46206
MODEL N0.
SERIAL N0.
1 DF.SIGN/TEST PRESSURE GAGE 1
HIGH PSI 300 kPa 2068
TSEZ'PSl 150 TPo 1034
COMPRESSOR
FAN MOTOR
powgPi S upply
VOLTS AC
VOLTAGE RAN5F
MIN ¿I
SYSTEM
VOLTS
EHÜI £LA
SUITABLE FOR
OUTDOOR USE
REFRIGERANT:
R-22
LBS kg
HOLDING CHARGE
MAX MIN
IMAX■ FU5E/HASR TyRE'';CB; AHPT
PI5T0N
nn OP
P hi I h 7I
PER I nstallation I n SFR u CHW
V MADE IN MEXICO
CERTIFICATION APPLIES QH.Y
IKN THE CO(f>LETE SYSTD1
IS LISTED WITH ARI
I 317204-401 REV.
Fig. 3—Unit Rating Piate
A90282
Fig. 4—Rigging
A CAUTION
A90285
A brazing shield MUST be used when tubing sets ate being
brazed to the service valves to prevent damage to the painted
unit surface.
A CAUTION
To avoid valve damage while brazing, service valves must be
wrapped with a heat-sinking material such as a wet cloth.
FILTER DRIER — Install in field liquid line, if used.
SWEAT CONNECTION — Use refrigerant grade tubing. Service
valves are closed from factory and ready for brazing. After
wrapping the service valve with a wet cloth, the tubing set can be
brazed to the service valve using either silver bearing or non-silver
bearing brazing material. Consult local code requirements. Refrig­
erant tubing and indoor coil are now ready for leak testing. This
check should include all field and factory joints.