Carrier 38BYC Installation And Start-Up Instructions Manual page 4

UNIT
SiZE
018
O24
030, 036
O42
048, 060
NOTES:
Table 1--Refrigerant Connections And Recommended Liquid= And Vapor=Tube Diameters (in.)
LBQUID VAPOR VAPOR (LONG LINE)
Connection Diameter Tube Diameter Connection Diameter Tube Diameter Connection Diameter Tube Diameter
3/8 3/8 5/8 5/8 5/8 3/4
3/8 3/8 3/4 3/4 3/4 3/4
3/8 3/8 3/4 3/4 3/4 7/8
3/8 3/8 7/8 7/8 7/8 1-1/8
3/8 3/8 7/8 1-1/8 7/8 1-1/8
1 Tube diameters are for lengths up to 50 ft. For tubing _engths greater than 50 ft horizontal, or greater than 20 fl vertical differential, consult the Application Guideline
and Service Manual -- Air Conditioners and Heat Pumps.
2 Do not apply capillary tube indoor coils to these units
OUTDOOR E_IT CONNE(TED TO FACTORY APPROVED
INDOOR UNIT
Outdoor unit contains cmTect system refrigerant charge fbr opera-
tion with indoor unit of same size when connected by 15 ft of
field-supplied or f_cto_ accesso_ robing. Check rei'rigerant
charge for maxin-mn_ efficiency.
REFRIGERANT TUBING
Connect robing to fittings on outdoor unit vapor- and liquid-
service valves. (See Table 1.) Lse refi'igerant grade robing
SWEAT CONNE(TION
Remove plastic retainer holding outdoor piston in liquid service
vah'e and connect sweat/flare adapter provided to vah'e (See Fig
7) Connect refi'igerant robing to fittings on outdoor unit vapor-
and liquid-service valves. Selwice valves are closed fi'om facto_
and tea@ for brazing. After wrapping service valve with a wet
cloth, robing set can be brazed to service valve using either silver
bearing or non-silver bearing brazing material. Consult local code
requirements. Refi'igerant tubing and indoor coil are now ready for
leak testing. This check should include all field and fi_cto_" joints.
PISTON
PISTON
PISTON
RETAINER
STRAINER
"_'_ SWEAT/FLARE ADAPTER
A97512
Fig. 7--Liquid-Service Valve
mMPORTANT: (beck to be certain fuctory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not robbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on f_eder tubes are
secure and tight
Step 10--Nake Electrical Connections
To avoid personal injmy or death, do not supply power to unit
with compressor terminal box cover removed.
Be sure field wiring complies with local and national fire, safkty,
and electrical codes, and voltage to system is within limits shown
on unit rating plate ( ontact tocal power company fbr convction of
improper voltage. See unit rating plate fbr recommended circuit-
protection device.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affkct unit reliability See unit rating plate Do not
install unit in system where voltage may fluctuate above or below
pem_issible limits.
NOTE: Lse copper wire only between disconnect switch and
unit
NOTE: Install branch circuit disconnect of adequate size per
NE( to handle unit stmling cun'ent 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
The unit cabinet must have an uninterropted or unbroken
ground to minimize personal injury if an electrical fhult
should occur. The ground may consist of electrical wire or
metal conduit when installed in accordance with existing
electrical codes Failure to fbllow this warning can result in an
electric shock, fire, or death
CONNE(T GROUND AND POWER WIRES
Connect ground wire to ground connection in control box for
safety Connect power wiring to contactor as shown in Fig 8.
(ONNE(T (ONTROL WIRING
Route 24v control wires through contloi wiring grommet and
connect leads to control wiring. See Them_ostat Installation
Instractions for wiring specific unit combinations (See Fig. 9)
Use No. 18 AWG color coded, insulated (35_>C mininmm) wire. If
thermostat is located more than 100 ft fi'om unit, as measured
along the contlol voltage wires, use No. 16 AWG color coded wire
to avoid excessive voltage &op
All wiring must be NEC Class 1 and must be separated from
incoming power leads