Carrier 48GC04 Service And Maintenance Instructions

14remove the mechanical flare nut from the equalizer line.Then use a new coupling to braze the equalizer line to thestub (previous equalizer line) in suction line.8. Attach TXV bulb in the same location where the original(in the sensing bulb indent) was when it was removed,using the supplied bulb clamps. See Fig. 22.9. Route equalizer tube through suction connection opening(large hole) in fitting panel and install fitting panel inplace.10. Sweat the inlet of TXV marked “IN” to the liquid line.Avoid excessive heat which could damage the TXV valve.Use quenching cloth when applying heat anywhere onTXV.Refrigerant System Pressure Access PortsThere are two access ports in the system: on the suction tubenear the compressor and on the discharge tube near the com-pressor. These are brass fittings with black plastic caps. Thehose connection fittings are standard 1 / 4-in. SAE male flarecouplings.The brass fittings are two-piece high flow valves, with a recep-tacle base brazed to the tubing and an integral spring-closedcheck valve core screwed into the base. See Fig. 23. This checkvalve is permanently assembled into this core body and cannotbe serviced separately; replace the entire core body if neces-sary. Service tools are available from RCD that allow the re-placement of the check valve core without having to recoverthe entire system refrigerant charge. Apply compressor refrig-erant oil to the check valve core’s bottom o-ring. Install the fit-ting body with 96 ± 10 in.-lb (10.85 ± 1.1 Nm) of torque; donot over-tighten. Fig. 22 — TXV Valve and Sensing Bulb LocationFig. 23 — CoreMax 1 Access Port AssemblyTXV SENSINGBULBCLAMPTHERMAL EXPANSION(TXV) VALVESENSING BULB INSULATION REMOVED FOR CLARITY1. CoreMax is a registered trademark of Fastest, Inc.5/8” HEX 0.4730°0.5961/2-20 UNF RH1/2” HEX45°WASHERO-RING7/16-20 UNF RHDEPRESSOR PER AHRI 720+.01/-.035FROM FACE OF BODYThis surface provides a metal to metal seal whentorqued into the seat. Appropriate handling isrequired to not scratch or dent the surface.SEAT CORE(Part No. EC39EZ067)