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Фрагмент инструкции
Be careful not to scratch flare sealing surface. If retainer does not pull out easily, carefully use vise grips to remove retainer. Replace scratched or damaged retainer. 6. Slide piston out by inserting a small soft wire thru metering hole (18-gage thermostat wire). See that metering hole, sealing surface around piston cones and fluted portion of piston are not damaged. 7. Chart on unit access panel illustrates proper arrangement and sizes of pistons. 8. Clean piston refrigerant metering orifice. 9. Replace container O-ring before reassembling AccuRater. Carrier O-ring part no. is 99CC501052. LIQUID LINE STRAINERS (protect AccuRater), are made of wire mesh and located in the liquid line on each side of the AccuRater. The strainers are pressed into the line. Remove strainer by threading a #10 sheet metal screw into strainer and pulling the screw with pliers. Compressor Removal — See Table 5 for compressor information and Fig. 10 for component location. Follow safety codes, and wear safety glasses and work gloves. Have quenching cloth available (step 8). CAUTION; A&iEHKHiia t&bmg femed ki 50¥<£ &83t ccais. £k* BOt &$edsea& -or ptece excessive Siiaiaj ©a tabmg. or damage may result. Table 5 — Compressor Data MODEL PRODUCTION COMPRESSOR* M24 ' M27 M34 P46 P53 P64 OIL RECHARGE (oz) 44 44 44 76 76 76 50YQ024 50YQ030 50YÛ036 50YQ042 50YQ048 50YQ060 ‘Refer to compressor nameplate for complete model number 1. Shut off power to unit. Remove unit access panel, Fig. 10. 2. Remove refrigerant from unit using refrigerant removal methods described in Carrier Standard Service Techniques Manual, Chapter 1, Refrigerants. 3. Remove core from suction and discharge line Schrader valves. 4. Disconnect compressor wiring at compressor terminal box. 5. Using a tubing cutter, cut suction and discharge lines at convenient place near compressor for easy reassembly to new compressor with copper clip couplings. CAUTION: Excessive msvecciei« of copper $ïres at compressor may essse & hseak where lines connect to other system composeras. 6. Remove crankcase heater from compressor base. 7. Remove compressor hold-down bolts and lift compressor out. 8. Carefully unbraze suction and discharge line piping stubs from compressor. If oil vapor in piping stubs ignites, use quenching cloth. CAUTION: M«Skr maywantiiy of 9. 10. Braze piping stubs (removed in step 8) on new compressor. Install new compressor in unit. Braze suction and discharge lines to compressor piping stubs (at points where cut, step 5) using field-supplied copper couplings. Ensure compressor hold-down bolts are in place. Connect wiring. CGOiJMG PiSTOtt HgATOXS “LOW RCeBEflO-RiHG TO ■MDOOf? ^CGti STAMPED ARROW OK COUPLING SÛOY H£A7>MS (TCWAROiNCCORCCiU PiSTm STRAINER RETAINER Flare MUT NOTE Piston sizes are tabulated on unit access psr.el Sirstners 3fe located >n ixjcKf fin® on each sKie of AccuRater Relative pos.'t'on of comporter.ts is critics! for cc-rect operation Fig. 23 — AccuRater™ (Dual-Piston) Components 12 11. Clean system. Add new suction line filter-drier as described below. NOTE: If a compressor failure was caused by motor winding burnout, the by-products of the burnout must be separated from the circulating refrigerant. This must be done before the byproducts enter the reversing valve or accumulator and render parts inoperative. Burnout byproducts can cause future system operating problems if left in the system. Clean the system by installing a suction line drier in the refrigerant line where the suction gas enters the reversing valve. During the cooling cycle, this is the line from the indoor coil running across the top of compressor compartment; during heating cycle, install drier in line between outdoor coil and reversing valve. If possible, run unit in cooling mode when cleaning system as installation of temporary suction drier is simplified. For drier installation during heating cycle, cut vertical line below reversing valve to install fittings and tubing as suction drier must be placed outside of cabinet. Fabricate and install a temporary access panel to provide protection against entry and possible electric shock hazard. -> To provide protection for the reversing valve, do not place filter-drier between reversing valve and accumulator. Since the suction drier works on one mode only, temporarily wire the unit in the selected mode (heating or cooling, based on suction drier location). To insure cooling operation only, install a jumper between terminals “R” and “O” on the low voltage terminal board. For heating operation only, remove and insulate one of the reversing valve solenoid leads. Run unit for 48 hours and check oil for acidity. If satisfactory, remove suction line drier. Refer to and follow procedure under AccuRater"'' Servicing for cleaning of AccuRater. Rewire unit to normal condition. 12. Triple-evacuate and recharge unit. See Refrigerant Charging. Filter-Drier — Install an accessory 5...