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

Page 32

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,

32

Image 32

Contents Table of Contents Safety ConsiderationsReceiving and Installation Introduction677C--A24-30 Unit Dimensions 677C--A36-60 Unit Dimensions Unit Size CPRFCURB010A00CPRFCURB011A00 CPRFCURB012A00Rigging/Lifting of Unit See Fig Rig and Place UnitInspection Install Flue Hood Install Gas PipingConnect Condensate Drain Carbon Monoxide Poisoning HazardFire or Explosion Hazard Install Duct ConnectionsConfiguring Units for Downflow Vertical Discharge Compressors Refrigerant MeteringCFM Furnace SectionHeating Inputs Physical Data Unit 677C--A Cont’dMaximum Gas Flow Capacity Install Electrical Connections Special Procedures for 208-V OperationHigh-Voltage Connections Control Voltage ConnectionsBalance Point Setting-Thermidistat or Hybrid Thermostat PRE-START-UPTransformer Protection FIRE, EXPLOSION, Electrical Shock HazardStart-up Heating and Make Adjust- ments START-UPCheck for Refrigerant Leaks Unit Sequence of OperationAdjust Gas Input Check Heating ControlCheck Gas Input Unit Damage HazardAirflow and Temperature Rise Limit SwitchesCheck Burner Flame Normal OperationStart-up Cooling and Make Adjust- ments Rollout SwitchChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsTwo Cooling Fan Speeds Set-up Dehumidification feature used Gas Heating Fan Speed Set-upContinuous Fan Operation Color Coding for Indoor Fan Motor Leads677C--A Wet Coil Pressure Drop Filter Size CFMUnit Heating Motor Wire Rise Speed Color Range1505 1452 1413 1358 1323 1282 1234 1169 1130 25 55oF Heating 1962 1915 1880 1843 1794 1753 1711 1675 1628 35 65oF Heating 1962 1915 1880 1843 1794 1753 1711 1675 1628 30 60oF Heating 1887 1847 1783 1726 1677 1625 1578 1527 1432 30 60oF Heating 677C a 208/230-3-60 Wiring Diagram, Unit 677C--A Cooling Charging Table-Subcooling Maintenance Cleaning the Blower Motor and WheelAir Filter Indoor Blower and MotorLimit Switch Induced Draft combustion air Blower AssemblyBurner Ignition Flue Gas PassagewaysElectrical Controls and Wiring Outdoor FanRefrigerant Circuit EXPLOSION, Personal Injury and Environmental HazardPressure Switches Loss of Charge SwitchGas Input Indoor AirflowExplosion Hazard High-Pressure SwitchCopeland Scroll Compressor Puron Refrigerant Unit Operation and Safety Hazard Refrigerant SystemCompressor Oil Servicing Systems on Roofs and with Synthetic materialsPuronr R-410A Quick Reference Guide TroubleshootingSTART-UP Checklist Troubleshooting Guide Cooling or Heat Pump Heating Mode Symptom Cause RemedyLED OFF Troubleshooting Guide-HeatingTroubleshooting Guide-LED Status Codes Temperatures Remove and Store in Job FilesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor Amps