Manuals / Bryant / Household Appliance / Air Conditioner

Bryant 677C--A Unit Operation And Safety Hazard, Refrigerant System, Compressor Oil, 677C-- --A

Models: 677C--A

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LEGEND

ACCUMULATOR

COMPRESSOR

HP S

OUTDOOR COIL

TXV in Metering

Position

LCS

INDOOR COIL

677C-- -- A

LEGEND	Bypass
	Position

HPS – High Pressure Switch

LCS – Loss of Charge Switch

Accurater®Metering De vice

Arrow indicates direction of flow

Fig. 25 - Typical Heat Pump Operation, Cooling Mode

C03011

ACCUMULATOR

COMPRESSOR

HP S

OUTDOOR COIL

TXV in Bypass

Position

LCS

INDOOR COIL

Metering

Position

LEGEND

HPS – High Pressure Switch

LCS – Loss of Charge Switch

Accurater®Metering De vice

Arrow indicates direction of flow

Fig. 26 - Typical Heat Pump Operation, Heating Mode

C03012

!WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could result in personal injury or equipment damage.

This system uses Puron (R-410A) refrigerant which has higher operating pressures than R-22 and other refrigerants. No other refrigerant may be used in this system. Gauge set, hoses, and recovery system must be designed to handle Puron. If you are unsure, consult the equipment manufacturer.

Refrigerant System

This information covers the refrigerant system of the 677C--A including the compressor oil needed, servicing systems on roofs containing synthetic materials, the filter drier and refrigerant charging.

Compressor Oil

If additional oil is needed use Uniqema RL32-3MAF. If this oil is not available, use Copeland Ultra 32CC or Mobil Artic EAL22CC. This oil is extremely hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere.

Servicing Systems on Roofs and with Synthetic materials

POE (polyolester) compressor lubricants are known to cause long term damage to some synthetic roofing materials.

Exposure, even if immediately cleaned up, may cause embrittlement (leading to cracking) to occur in one year or more. When performing any service that may risk exposure of compressor oil to the roof, take appropriate precautions to protect roofing. Procedures which risk oil leakage include, but are not limited to, compressor replacement, repairing refrigerant leaks,

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Bryant 677C--A installation instructions Unit Operation And Safety Hazard, Refrigerant System, Compressor Oil, 677C-- --A

Contents

TABLE OF CONTENTS SAFETY CONSIDERATIONSFig. 1 - Unit 677C--A Installation InstructionsRECEIVING AND INSTALLATION INTRODUCTIONStep 1 - Check Equipment Step 2 - Provide Unit SupportA09146 Fig. 2 - 677C--A24-30Unit Dimensions677C-- --A A09147 Fig. 3 - 677C--A36-60Unit Dimensions677C-- --A Fig. 4 - Roof Curb Dimensions 677CSMALL CURB ROOF CURB DETAILACCESS PANELS MUST BE IN PLACE WHEN RIGGING Step 5 - Rig and Place UnitInspection Rigging/Lifting of Unit See FigStep 7 - Install Flue Hood Step 8 - Install Gas PipingStep 6 - Connect Condensate Drain Fig. 6 - Condensate TrapStep 9 - Install Duct Connections Configuring Units for Downflow Vertical DischargeFig. 7 - Sediment Trap FIRE OR EXPLOSION HAZARDFig. 8 - Supply and Return Duct Opening 677C-- --AHorizontal Duct Covers Table 1 - Physical Data - Unit 677CTable 1 - Physical Data - Unit 677C--ACont’d Table 2 - Maximum Gas Flow CapacityTable 3 - Heating Inputs 677C-- --AStep 10 - Install Electrical Connections Special Procedures for 208-VOperationHigh-VoltageConnections Control Voltage ConnectionsBalance Point Setting-Thermidistator Hybrid PRE-START-UPTransformer Protection ThermostatStep 3 - Start-upHeating and Make Adjust- ments START-UPStep 1 - Check for Refrigerant Leaks Step 2 - Unit Sequence of OperationAdjust Gas Input Fig. 11 - Burner AssemblyCheck Heating Control Check Gas InputAirflow and Temperature Rise Limit SwitchesCheck Burner Flame Normal OperationStep 4 - Start-upCooling and Make Adjust- ments Rollout SwitchChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsGas Heating Fan Speed Set-up Continuous Fan OperationTable 6 - Color Coding for Indoor Fan Motor Leads 677C-- --AFig. 14 - Interface Fan Board IFB Table 8 - 677C--AWet Coil Pressure Drop677C-- --A Table 7 - Filter Pressure Drop Table IN. W.C677C-- --A UNIT677C-- --A Heating677C-- --A 1295677C-- --A 1445677C-- --A 1448677C A A09068677C-- --A A09209Fig. 17 - Cooling Charging Table-Subcooling 677C-- --A50VT500173 REV A09099MAINTENANCE Cleaning the Blower Motor and WheelAir Filter Indoor Blower and MotorLimit Switch Induced Draft combustion air Blower AssemblyFig. 18 - Blower Housing and Flue Collector Box Fig. 19 - Unit Access PanelsElectrical Controls and Wiring Outdoor FanRefrigerant Circuit Fig. 20 - Removal of Motor and Blower WheelPage High-PressureSwitch Copeland Scroll Compressor Puron RefrigerantEXPLOSION HAZARD Fig. 24 - Refrigerant CircuitUNIT OPERATION AND SAFETY HAZARD Refrigerant SystemCompressor Oil 677C-- --ATROUBLESHOOTING START-UPCHECKLISTSynthetic Roof Precautionary Procedure Liquid Line Filter DrierSYMPTOM 677C-- --A677C-- --A Table 12 - Troubleshooting Guide-HeatingTable 13 - Troubleshooting Guide-LEDStatus Codes TEMPERATURES Remove and Store in Job FilesI. PRELIMINARY INFORMATION MODEL NO PRESSURES