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Bryant 577D----A Air Conditioner With Puron, Refrigeration Section Quick-Referenceguide

Models: 577D----A

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AIR CONDITIONER WITH PURON

REFRIGERATION SECTION QUICK-REFERENCE GUIDE

Puron refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are designed to operate with Puron. Puron refrigerant cylinders are rose colored.

SPuron refrigerant cylinders manufactured prior to March 1, 1999, have a dip tube that allows liquid to flow out of cylinder in upright position. Cylinders manufactured March 1, 1999 and later DO NOT have a dip tube and MUST be positioned upside down to allow liquid to flow.

SRecovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400.

SPuron systems should be charged with liquid refrigerant. Use a commercial-type metering device in the manifold hose. S Manifold sets should be minimum 700 psig high side and 180 psig low side with 550 psig low side retard.

S Use hoses with minimum 700 psig service pressure rating.

S Leak detectors should be designed to detect HFC refrigerant. S Puron, as with other HFCs, is only compatible with POE oils. S Vacuum pumps will not remove moisture from oil.

S Only use factory-specified liquid-line filter driers with rated working pressures no less than 600 psig. S Do not install a suction-line filter drier in liquid line.

S POE oils absorb moisture rapidly. Do not expose oil to atmosphere. S POE oils may cause damage to certain plastics and roofing materials. S Wrap all filter driers and service valves with wet cloth when brazing. S A Puron liquid-line filter drier is required on every unit.

S Do not use an R-22 TXV.

S Never open system to atmosphere while it is under a vacuum.

S When system must be opened for service, break vacuum with dry nitrogen and replace filter driers. S Do not vent Puron into the atmosphere.

S Observe all warnings, cautions, and bold text.

S Do not leave Puron suction line driers in place for more than 72 hrs.

577D-- -- A

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Bryant 577D----A Air Conditioner With Puron, Refrigeration Section Quick-Referenceguide, 577D-- --A

Contents

EQUIPMENT OPERATION HAZARD TABLE OF CONTENTSFig. 1 - Unit 577D--A Installation InstructionsRECEIVING AND INSTALLATION SAFETY CONSIDERATIONSUNIT OPERATION AND SAFETY HAZARD INTRODUCTIONProvide Clearances Installation on older “G” series roof curbsRig and Place Unit Inspection577D Fig. 4 - Roof Curb DimensionsC G H F A D UNIT PLACEMENT ON COMMON CURB577D-- --A Fig. 5 - 577D--A24-30Unit DimensionsA09556 577D-- --A Fig. 6 - 577D--A36-60Unit DimensionsA09557 577D-- --A Table 1 – Physical Data - Unit 577D--AINDOOR FAN 577D-- --A Table 1—PhysicalData Con’t - Unit 577D--ARigging/Lifting of Unit See Fig Select and Install DuctworkFig. 7 - Suggested Rigging PERSONAL INJURY HAZARDProvide for Condensate Disposal Configuring Units for Downflow Vertical DischargeFig. 8 - Supply and Return Duct Opening 577D-- --AInstall Gas Piping Install Flue HoodCARBON MONOXIDE POISONING HAZARD Fig. 9 - Condensate TrapFig. 10 - Sediment Trap Install Electrical ConnectionsFIRE OR EXPLOSION HAZARD UNIT COMPONENT DAMAGE HAZARDC. Electronic Air Cleaner A. Outdoor Air Temperature Sensor OATTable 2 – Maximum Gas Flow Capacity B. Humidifier ConnectionsFig. 12 - Line Power Connections Fig. 11 - Typical Installation577D-- --A HP/AC BOARD FURNACE BOARD Fig. 14 - Control Voltage Wiring ConnectionsFig. 13 - Control Plate 577D-- --APRE-START-UP Unit Start-Upand TroubleshootingSTART-UP A. LED DescriptionD. Furnace Control Troubleshooting C. Indoor Fan Motor TroubleshootingFig. 15 - Detail of Furnace Board 577D-- --AA10217C 577D AA10217L 577D-- --AA10219C 577D AA10219L 577D-- --AFig. 18 - 2-StageHP/AC Control Board E. HP/AC Control Troubleshooting577D-- --A UNIT OPERATION HAZARD Sequence of Operation577D-- --A Rated Heating Input Btu/hr 577D-- --AFIRE HAZARD UNIT DAMAGE HAZARD577D-- --A Table 5 – Altitude Derate Multiplier for U.S.A FIRE AND UNIT DAMAGE HAZARDFig. 19 - Redundant Automatic Gas Control Valve 577D-- --AFig. 20 - Burner Assembly Check for Refrigerant Leaks Start-UpAdjustmentsFig. 21 - Monoport Burner 577DTable 7 – ECM Wet Coil Pressure Drop IN. W.C Table 6 – Heating InputsTable 8 - Filter Pressure Drop Table IN. W.C 577D-- --A577D-- --A Fig. 23 - Cooling Charging Table-SubcoolingA06360 A09109Limit Switch MAINTENANCEAir Filter Indoor Fan and MotorElectrical Controls and Wiring Inducer Pressure SwitchFig. 24 - Unit Access Panels Fig. 25 - Blower Housing and Flue Collector BoxUNIT OPERATION, SAFETY AND ENVIRONMENTAL HAZARD Pressure Switches - Refrigerant CircuitRefrigerant Circuit Indoor Airflow577D-- --A TROUBLESHOOTINGFINAL CHECKS Fig. 28 - Resistance Values Versus TemperatureFig. 29 - Outdoor Coil Thermistor OCT Attachment 577D-- --A CARE AND MAINTENANCEREFRIGERATION SECTION QUICK-REFERENCEGUIDE AIR CONDITIONER WITH PURONS Observe all warnings, cautions, and bold text 577D-- --A577D-- --A Table 9 – Troubleshooting Chart - CoolingPoor flame characteristics SYMPTOM577D-- --A CAUSETEMPERATURES START-UPCHECKLISTRemove and Store in Job Files I. PRELIMINARY INFORMATION MODEL NO