Bryant 598B Installing TXV in Place of Piston, Replacing R-22 TXV or NON-BALANCE Port Puron TXV

B

INLET

D A

COIL

E

BULB

INSULATION

TAPE

C

A01418

Fig. 5—TXV Kit Contents

INSTALLING TXV IN PLACE OF PISTON

1.Remove any existing refrigerant and ensure coil has not been exposed to atmospheric pressure for more than 15 minutes.

2.Remove indoor coil inlet tube at piston body inlet. Use back-up wrench to prevent damage.

3.Remove piston retainer, begin careful not to damage scaling surface of O-ring.

4.Remove and discard factory-installed piston. (Replace re- tainer if O-ring is damaged.)

5.Reinstall piston retainer in piston body.

6.Replace indoor coil inlet tube. Use back-up wrench to prevent damage.

CAUTION: To prevent damage to the unit, use a brazing shield and wrap TXV with wet cloth.

7.Sweat swivel adapter (see Fig. 5D) to inlet of indoor coil and attach to TXV (see Fig. 5A) 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

8.Install vapor elbow (see Fig. 5B) 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.

9.Connect equalizer tube of TXV to 1/4-in. equalizer fitting on vapor line adapter.

10.Attach TXV bulb to horizontal section of suction line using bulb straps provided. (See Fig. 5C.) Insulate bulb with factory-supplied insulation tape. (See Fig. 5E.) See Fig. 6 for correct positioning of sensing bulb.

11.Proceed with remainder of unit installation.

REPLACING R-22 TXV OR NON-BALANCE PORT PURON TXV

1.Remove any existing refrigerant and ensure coil has not been exposed to atmospheric pressure for more than 15 minutes.

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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 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. (See Fig. 5A.) 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 strap. (See Fig. 5C.) See Fig. 6 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.

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. (See Fig. 5B.) Adapter has a 1/4-in. male connector for attaching equalizer tube. (See Fig. 5B.)

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.