Long-Line Applications; Make Piping Connections - Bryant 598B Installation And Start-Up Instructions Manual

NOTE: If the piston is not removed from the body, TXV will not
function properly.
CAUTION: To prevent damage to the unit, use a brazing
shield and wrap TXV with wet cloth or use heat sink
material.
5. Install TXV on indoor coil liquid line. Sweat swivel adapter
to inlet of indoor coil and attach to TXV outlet. Use backup
wrench to avoid damage to tubing or valve. Sweat Inlet of
TXV, marked "IN" to liquid line. Avoid excessive heat
which could damage valve
6. Install vapor elbow with equalizer adapter to suction tube of
line set and suction connection to indoor coil. Adapter has
a 1/4-in. male connector or attaching equalizer tube.
7. Connect equalizer tube of TXV to 1/4-in. equalizer fitting
on vapor line adapter.
8. Attach TXV bulb to horizontal section of suction line using
clamps provided. Insulate bulb with field-supplied insula-
tion tape. See Fig. 4 for correct positioning of sensing bulb.
9. Proceed with remainder of unit installation.
STRAP
8 O'CLOCK
Fig. 4—Positioning of Sensing Bulb
REPLACING R-22 TXV OR NON-BALANCED PORT
PURON TXV ON INDOOR COIL
1. Pump system down to 2 psig and recover refrigerant.
2. Remove coil access panel and fitting panel from front of
cabinet.
3. Remove TXV support clamp using the 5/16-in. nut driver.
Save the clamp.
4. Remove TXV using a backup wrench on flare connections
to prevent damage to tubing.
5. Using wire cutters, cut equalizer tube off flush with vapor
tube inside cabinet.
6. Remove bulb from vapor tube inside cabinet.
7. Braze equalizer stub-tube closed. Use protective barrier as
necessary to prevent damage to drain pan.
IMPORTANT: Route the equalizer tube of the approved Puron®
TXV through suction line connection opening in fitting panel prior
to replacing fitting panel around tubing.
8. Install TXV with 3/8-in. copper tubing through small hole
in service panel. To avoid damage to tubing or valve, use
wrench and backup wrench to attach TXV to distributor.
9. Reinstall TXV support clamp (removed in item 3).
10. Attach TXV bulb to vapor tube inside cabinet, in same
location as original was when removed, using supplied bulb
clamps (nylon or copper). See Fig. 4 for correct positioning
of sensing bulb.
11. Route equalizer tube through suction connection opening
(large hole) in fitting panel and install fitting panel in place.
SENSING BULB
4 O'CLOCK
A00399
12. Sweat inlet of TXV, marked "IN" to liquid line. Avoid
excessive heat which could damage valve.
13. Install vapor elbow with equalizer adapter to vapor line of
line set and vapor connection to indoor coil. Adapter has a
1/4-in. male connector for attaching equalizer tube.
14. Connect equalizer tube of TXV by 1/4-in. equalizer fitting,
on vapor line adapter. Use backup wrench to prevent
damage to equalizer fitting.
15. Proceed with the remainder of unit installation.
B. LONG-LINE APPLICATIONS
For refrigerant piping arrangements with equivalent lengths
greater than 50 ft or when elevation difference between indoor
and/or outdoor unit is more than 20 ft, follow all requirements of
the Long-Line Guideline section in the Application Guideline and
Service Manual for Residential Split-System Air Conditioners and
Heat Pumps Using Puron Refrigerant.
VI. MAKE PIPING CONNECTIONS
WARNING: Relieve pressure and recover all refrigerant
before system repair or final unit disposal to avoid
personal injury or death. Use all service ports and open all
flow-control devices, including solenoid valves.
CAUTION: Do not leave system open to atmosphere
any longer than minimum required for installation. POE
oil in compressor is extremely susceptible to moisture
absorption. Always keep ends of tubing sealed during
installation.
CAUTION: If ANY refrigerant tubing is buried, provide
6–in. vertical rise at service valve. Refrigerant tubing
lengths up to 36 in. may be buried without further special
consideration. Buried refrigerant tubing lengths greater
than 36 in. are NOT recommended.
CAUTION: To prevent damage to unit or service valves,
observe the following:
• Use a brazing shield.
• Wrap service valves with wet cloth or use a heat sink
material.
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. Tubing diameters listed in Table 1 are adequate
for equivalent lengths up to 50 ft. For tubing requirements beyond
50 ft, substantial capacity and performance losses can occur.
Follow the recommendations in the Application Guideline and
Service Manual for Residential Split-System Air Conditioners and
Heat Pumps Using Puron® Refrigerant to minimize losses. Refer
to Table 1 for field tubing diameters. Refer to Table 2 for
accessory requirements.
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.
A. OUTDOOR
APPROVED INDOOR UNIT
Outdoor unit contains correct system refrigerant charge for opera-
tion with indoor unit of same size when connected by 15 ft of
field-supplied or factory-accessory tubing. Check refrigerant
charge for maximum efficiency
—3—
UNIT CONNECTED TO FACTORY-