Bryant Preferred Series User Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53581021-01 Printed in U.S.A. Form SM581J-17-28-02 Pg 1 12-19 Replaces: SM581J-17-28-01
Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . .1
UNIT ARRANGEMENT AND ACCESS . . . . . . . . . . . . . .2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Routine Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . . .4
Supply Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
TWO-SPEED INDOOR FAN MOTOR SYSTEM:
2-SPEED FAN WITH VARIABLE FREQUENCY
DRIVE (VFD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Two-Speed Indoor Fan Motor System. . . . . . . . . . . . . . . . .5
Identifying Factory Option . . . . . . . . . . . . . . . . . . . . . . . . . .6
Unit Installation with 2-Speed Indoor Fan Motor Option.6
ADDITIONAL VFD INSTALLATION AND
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .6
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Replacing the Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Changing Fan Wheel Speed by Changing Pulleys . . . . . . .7
CONDENSER COIL SERVICE . . . . . . . . . . . . . . . . . . . . .7
Round Tube Plate Fin (RTPF) Condenser Coil . . . . . . . . .7
Recommended Condenser Coil Maintenance and
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
EVAPORATOR COILS . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Coil Maintenance and Cleaning Recommendation . . . . . .8
Evaporator Coil Metering Devices. . . . . . . . . . . . . . . . . . . .9
Refrigerant System Pressure Access Ports . . . . . . . . . . . . .9
PERFECT HUMIDITY ADAPTIVE DEHUMIDIFICA-
TION SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Perfect Humidity Modes . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Perfect Humidity System Components . . . . . . . . . . . . . . .10
Subcooler/Reheat Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Operating Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
THERMOSTATIC EXPANSION VALVE (TXV). . . . . .15
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Replacing TXV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Refrigerant System Pressure Access Ports . . . . . . . . . . . .16
PURON® (R-410A) REFRIGERANT. . . . . . . . . . . . . . . .16
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
COOLING CHARGING CHARTS. . . . . . . . . . . . . . . . . .18
COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Replacing the Compressor . . . . . . . . . . . . . . . . . . . . . . . . .22
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Adjusting the Condenser-Fan. . . . . . . . . . . . . . . . . . . . . . .22
TROUBLESHOOTING COOLING SYSTEM . . . . . . . .22
Troubleshooting Cooling System . . . . . . . . . . . . . . . . . . . .22
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . . .24
Non-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Unit-Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Wet in Use Convenience Outlet Cover. . . . . . . . . . . . . . . .24
Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
GFCI Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Fuse On Powered Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Using Unit-Mounted Convenience Outlets . . . . . . . . . . . . 25
Installing a Weatherproof Cover . . . . . . . . . . . . . . . . . . . . 25
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Smoke Detector Locations . . . . . . . . . . . . . . . . . . . . . . . . . 26
FIOP Smoke Detector Wiring and Response . . . . . . . . . . 28
Sensor and Controller Tests. . . . . . . . . . . . . . . . . . . . . . . . 29
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
INDICATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Normal State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Alarm State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . . . . 31
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Supply (Indoor) Fan Motor Protection . . . . . . . . . . . . . . . 31
Control Circuit, 24-v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
RTU-OPEN CONTROL SYSTEM . . . . . . . . . . . . . . . . . . 32
GAS HEATING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . 32
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Fuel Types and Pressures . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Flue Gas Passageways. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Combustion-Air Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Burners and Igniters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
ECONOMI$ER SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . 44
EconoMi$er IV Standard Sensors . . . . . . . . . . . . . . . . . . . 48
EconoMi$er® X (Factory Option). . . . . . . . . . . . . . . . . . . 54
PRE-START-UP/START-UP . . . . . . . . . . . . . . . . . . . . . . 67
START-UP, GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Additional Installation/Inspection . . . . . . . . . . . . . . . . . . . 67
FASTENER TORQUE VALUES . . . . . . . . . . . . . . . . . . . 69
APPENDIX A — MODEL NUMBER
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
APPENDIX B — PHYSICAL DATA . . . . . . . . . . . . . . . . 71
APPENDIX C — FAN PERFORMANCE . . . . . . . . . . . . 75
APPENDIX D — WIRING DIAGRAMS . . . . . . . . . . . . . 83
APPENDIX E — MOTORMASTER SENSOR
LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the litera-
Preferred Series™
581J*17-28
Gas Heat/Electric Cooling
with Puron
®
(R-410A) Refrigerant

Bryant Preferred Series Specifications

General

Brand	Bryant
Model	Preferred Series
Category	Air Conditioner
Language	English

Summary

Service and Maintenance Instructions

Safety Considerations

General safety precautions and warnings for installation and servicing personnel.

Unit Arrangement and Access

Overview of unit components and access panels for service.

Routine Maintenance

Scheduled checks and tasks for regular upkeep of the unit.

Air Filters and Screens

Procedures for cleaning and replacing air filters and screens.

Supply Fan (Blower) Section

Details on the supply fan assembly, belt drive, and tension adjustment.

Two-Speed Indoor Fan Motor System

Information on VFD-controlled two-speed fan motors and their operation.

Condenser Coil Service

Maintenance and cleaning recommendations for the condenser coil.

Evaporator Coils

Maintenance and cleaning procedures for the evaporator coil.

Perfect Humidity Adaptive Dehumidification System

Explanation of the system's modes, components, and operation.

Thermostatic Expansion Valve (TXV)

Details on the TXV, its operation, and replacement procedures.

Puron® (R-410A) Refrigerant

Information and warnings specific to the R-410A refrigerant system.

Compressors

Information on compressor lubrication, rotation, protection, and mounting.

Troubleshooting Cooling System

Guidance for diagnosing and resolving cooling system issues.

Convenience Outlets

Details on unit-mounted convenience outlet types and GFCI maintenance.

Smoke Detectors

Information on factory-installed smoke detector systems and their components.

Sensor and Controller Tests

Procedures for testing smoke detector sensors and controllers.

Protective Devices

Details on internal motor protection, overtemperature, and pressure switches.

Gas Heating System

Overview of the gas heating system, fuel types, pressures, and components.

Burners and Igniters

Information on main burners, orifice projection, and gas train removal.

Gas Valve

Adjustment settings and operational checks for the gas valve.

Table 16 - Altitude Compensation* (17-30) for Natural Gas

Altitude compensation data for natural gas heating inputs.

Table 17 - Altitude Compensation* (17-30) for Propane Gas

Altitude compensation data for propane gas heating inputs.

Minimum Heating Entering Air Temperature

Required minimum entering air temperatures for heating operation.

Troubleshooting Heating System

Guidance for diagnosing and resolving heating system issues.

Table 19 - IGC Board LED Alarm Codes

Explanation of LED alarm codes for the Integrated Gas Control board.

Economiser Systems

Overview of economizer systems, types, and component locations.

EconoMi$er IV Standard Sensors

Description of standard sensors used in the EconoMi$er IV system.

Economiser IV Control Modes

Explanation of various control modes for the EconoMi$er IV system.

Table 27 - W7220 Menu Structure*

Hierarchical menu structure for the W7220 economizer controller.

Table 28 - Damper Minimum Position Settings and Readings on Checkout Menu

Settings and readings for damper minimum position during checkout.

Table 31 - Enthalpy Operation without DCV (CO2 Sensor) - 1 Speed Fan

Enthalpy operation logic for 1-speed fan without DCV.

Table 33 - Dry Bulb Operation without DCV (CO2 Sensor) - 2 Speed Fan

Dry bulb operation logic for 2-speed fan without DCV.

Table 34 - Dry Bulb Operation with DCV (CO2 Sensor) - 2 Speed Fan

Dry bulb operation logic for 2-speed fan with DCV.

Table 35 - Enthalpy Operation without DCV (CO2 Sensor) - 2 Speed Fan

Enthalpy operation logic for 2-speed fan without DCV.

Table 36 - Enthalpy Operation with DCV (CO2 Sensor) - 2 Speed Fan

Enthalpy operation logic for 2-speed fan with DCV.

Enthalpy Settings

Explanation of enthalpy and dew point set points for economizer operation.

Checkout

Procedures for performing checkout tests on configured system parameters.

Pre-Start-Up/Start-Up

Safety precautions and general procedures for unit start-up.

Start-Up, General

Steps for unit preparation and initial start-up sequence.

Additional Installation/Inspection

Inspection points for field-installed accessories and wiring.

Fastener Torque Values

Table of specified torque values for various fasteners.

Appendix A — Model Number Nomenclature

Explanation of the model number coding system.

Appendix B — Physical Data

Table of physical specifications for cooling models.

Appendix C — Fan Performance

Fan performance data tables for various supply fan configurations.

Appendix D — Wiring Diagrams

Reference table for unit wiring diagrams based on model and options.

Appendix E — MotorMaster Sensor Locations

Illustrations showing the physical location of MotorMaster sensors.

Unit Start-Up Checklist

A checklist for pre-start-up, start-up, and perfect humidity system procedures.

Perfect Humidity Start-Up

Detailed steps and observations for starting up the Perfect Humidity system.