Carrier 38BYC Installation And Start-Up Instructions Manual page 3

If TXV installation is required, remove existing AccuRater_ t'rom
indoor coil Re_r to Figs 4 and 5 and install TXV kit as _bllows:
1_ Install suction robe adapter_
2. Install liquid flareoto-sweat adapter.
3. Connect external equalizer robe to fitting on suction robe
adapter.
4. Position sensing bulb on horizontal portion of suction robe
adapter. Secure using supplied hardware.
5. Insulate bulb aRer installation. (See Fig. 5.)
d. Leak check all connections.
feeder tubes, there is a 3/%in. O.D. stub robe approximately 2 in.
tong. (See Fig. 60 The defrost thermostat should be located on stub
mbe_ Note that there is only 1 stub robe used with liquid header,
and on most units it is the bottom circuit_
f STUB TUBE
DEFROST
THERMOSTAT
BULB
UALIZER
TUBE
EXPANSION
VALVE
Fig. 4--Typical TXV Insta!lation
O'CLOCK
2
SENSING
A88382
L-_'S UCTIO N
8 O'CLOCK 4 O'CLOCK
7_ IN. OD & SMALLER LARGER THAN 7_ IN. OD
A81032
Fig. 5--PositioNng of Sensing Bulb
Step 7--Check Outdoor AccuRater® Piston
(beck outdoor unit piston Remove retainer on liquid service valve
and check piston size with n_atching nm'uber listed on outdoor unit
rating plate.
Step 8--Check Defrost Thermostat
(heck defiost thermostat to ensure it is properly located and
securely attached There is a liquid header with a brass distributor
and feeder robe going into outdoor coil At the end of 1 of the
A97517
Fig. 6--Defrost Thermostat Location
Step 9--Make Piping Connections
Relieve pressure and recover all refi'igerant before system
repair or final unit disposal to avoid personal ir_.iuI?' or death.
Use all service ports and open all flow control devices,
including solenoid valves.
If ANY refrigerant robing is buried, provide a 6 in. vertical
rise at service valve, Ret'rigerant robing lengths up to 36 in,
may be buried without further special consideration. For
lengths longer than 36 in., refer to Application Guideline and
Service Manual Residential Split System Air ( onditioners
and Heat Pumps,
To prevent damage to unit or service valves obsela'e the
fbllowing:
*Use a brazing shield
*Wrap service valves with wet cloth or use a heatosink
material
Outdoor units may be connected to indoor section using accesso_
robing package or field-supplied refrigerant grade robing of coll'ect
size and condition For robing requirements beyond 50 it, substan-
tial capacity and per_brmance losses can occur Following the
recommendations in the Residential Split System Long-Line
Application Guideline will redtlce these losses. Ret'cr to Table 1
for field tubing equivalent line length Refer to Table 2 _br
accessory requirements
For buried line applications greater than 36 in., refer to Table 2 and
Residential Split System Buried Line Application Guideline.
Buried line applications may not exceed 100 t't.
If refrigerant tubes or indoor coil are exposed to atmosphere, they
must be evacuated to 500 microns to eliminate contamination and
moisture in the system