Bryant 604D--A installation instructions Maintenance, Defrost Control, Air Filter

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604D-- -- A

Step 3 — Defrost Control

Quiet Shift

Quiet Shift is a field-selectable defrost mode, which will eliminate occasional noise that could be heard at the start of defrost cycle and restarting of heating cycle. It is selected by placing DIP switch 3 (on defrost board) in ON position.

When Quiet Shift switch is placed in ON position, and a defrost is initiated, the following sequence of operation will occur. Reversing valve will energize, outdoor fan will turn off, compressor will turn off for 30 sec and then turn back on to complete defrost. At the start of heating after conclusion of defrost reversing valve will de-energize, compressor will turn off for another 30 sec, and the outdoor fan will stay off for 40 sec, before starting in the Heating mode.

Defrost

The defrost control is a time/temperature control which includes a field-selectable time period (DIP switch 1 and 2 on the board) between defrost cycles of 30, 60, 90, or 120 minutes (factory set at 60 minutes). To initiate a forced defrost, two options are available depending on the status of the defrost thermostat.

If defrost thermostat is closed, speed-up pins (J1) must be shorted by placing a flat head screw driver in between for 5 sec and releasing, to observe a complete defrost cycle. When the Quiet Shift switch is selected, compressor will be turned off for two 30 sec intervals during this complete defrost cycle, as explained previously. When Quiet Shift switch is in factory default OFF position, a normal and complete defrost cycle will be observed.

If defrost thermostat is in open position, and speedup pins are shorted (with a flat head screw driver) for 5 sec and released, a short defrost cycle will be observed (actual length is dependent upon the selected Quiet Shift position). When Quiet Shift switch is in ON position, the length of defrost is 1 minute (30 sec compressor off period followed by 30 sec of defrost with compressor operation). On return to heating operation, compressor will again turn off for an additional 30 sec and the outdoor fan for 40 sec. When the Quiet Shift is in OFF position, only a brief 30 sec. cycle will be observed.

NOTE: Unit will remain in defrost until defrost thermostat reopens at approximately 65_F (18_C) coil temperature at liquid line or remainder of defrost cycle time.

MAINTENANCE

To ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic maintenance must be performed on this equipment. This heat pump unit should be inspected at least once each year by a qualified service person. To troubleshoot unit, refer to Table 9.

NOTE: TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract.

!WARNING

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injury or death and unit component damage.

The ability to properly perform maintenance on this equipment requires certain expertise, mechanical skills, tools and equipment. If you do not possess these, do not attempt to perform any maintenance on this equipment, other than those procedures recommended in the Owner’s Manual.

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow these warnings could result in personal injury or death:

1.Turn off electrical power to the unit and install a lockout tag before performing any maintenance or service on this unit.

2.Use extreme caution when removing panels and parts.

3.Never place anything combustible either on or in contact with the unit.

!CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

When removing access panels (see Fig. 20) or performing maintenance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care is taken to reduce sharp edges to a minimum, be extremely careful when handling parts or reaching into the unit.

!CAUTION

UNIT OPERATION HAZARD

Failure to follow this caution may result in improper operation.

Errors made when reconnecting wires may cause improper and dangerous operation. Label all wires prior to disconnecting when servicing.

The minimum maintenance requirements for this equipment are as follows:

1.Inspect air filter(s) each month. Clean or replace when necessary.

2.Inspect indoor coil, drain pan, and condensate drain each cooling season for cleanliness. Clean when necessary.

3.Inspect blower motor and wheel for cleanliness each cooling season. Clean when necessary.

4.Check electrical connections for tightness and controls for proper operation each cooling season. Service when necessary.

Step 1 — Air Filter

IMPORTANT: Never operate the unit without a suitable air filter in the return-air duct system. Always replace the filter with the same dimensional size and type as originally installed. See Table 1 for recommended filter sizes.

Inspect air filter(s) at least once each month and replace (throwaway-type) or clean (cleanable-type) at least twice during each cooling season and twice during the heating season, or whenever the filter becomes clogged with dust and lint.

Indoor Blower and Motor

NOTE: All motors are pre-lubricated. Do not attempt to lubricate these motors.

NOTE: 460 volt units have a stepdown autotransformer that supplies approximately 230 volts to a nominal 230 volt indoor blower motor.

For longer life, operating economy, and continuing efficiency, clean accumulated dirt and grease from the blower wheel and motor annually.

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Contents Table of Contents Safety ConsiderationsCheck Equipment Receiving and InstallationIntroduction Provide Unit SupportUnit Falling Hazard Rig and Place UnitProperty Damage Hazard 604D--A24-36 Unit Dimensions 604D--A42-60 Unit Dimensions CPRFCURB012A00 SizeCPRFCURB010A00 CPRFCURB013A00Corner Weights Small Cabinet Corner Weights Large Cabinet Select and Install DuctworkRigging/Lifting of Unit See Fig Supply and Return Duct Openings Personal Injury and Electrical Operation HazardHigh-Voltage Connections Install Electrical ConnectionsProvide for Condensate Disposal Unit Component Damage HazardControl Voltage Connections Special Procedures for 208-V OperationAccessory Electric Heaters Installation Standard ConnectionsPhysical Data Unit 604D--A Minimum Airflow for Reliable Electric Heater Operation CFM604D a Cont. Ladder Wiring Schematics 208/230-1-60 Connection Wiring Schematics 208/230-3-60 Cont. Ladder Wiring Schematics 208/230-3-60 Connection Wiring Diagram Cont. Ladder Wiring Diagram Check for Refrigerant Leaks Start-Up AdjustmentsSTART-UP Checking Cooling and Heating Control Operation604D--A Sequence of Operation Checking and Adjusting Refrigerant ChargeIndoor Airflow and Airflow Adjustments Unit Operation HazardContinuous Fan Operation Two Cooling Fan Speeds Set-up Dehumidification feature usedSingle Speed Cooling With Higher Electric Heat Speed Color Coding for Indoor Fan Motor LeadsTypical Heat Pump Operation, Cooling Mode Defrost Control MaintenanceAir Filter Outdoor Coil, Indoor Coil, and Condensate Drain Pan Outdoor Fan604D--A Wet Coil Pressure Drop IN. W.C A24-60 Series aFilter Pressure Drop Table IN. W.C Cooling Charging Table-Subcooling Electrical Controls and Wiring Refrigerant CircuitHigh-Pressure Switch Pressure SwitchesLoss of Charge Switch Copeland Scroll Compressor Puron RefrigerantSTART-UP Checklist TroubleshootingSystem Information Puronr R-410A Quick Reference Guide Troubleshooting Chart Symptom Cause RemedyPreliminary Information Model no TemperaturesRemove and Store in Job Files III. START-UP Electrical Supply Voltage Compressor AmpsInstallation Vertical Economizer Factory Installed Option GeneralAccessories Small ChassisFilter Part Number Part NumberHood Divider Removed Economizer Hood Assembly Large Chassis Horizontal Return Duct Cover Panel and Hood Divider RemovalLeft Hood Side Hood Assembly Temperature ConfigurationSupply AIR Temperature SAT SENSOR-The supply Economizer Standard Sensors11.7C 12.8C 14.4C 17.2C 20C 22.8C 25.6C Economizer Controller 604D-- -- a Economizer Wiring Diagram A10200 Cont. Ladder Wiring Diagram A10199 604D-- -- a 604D-- -- a CO2 Sensor Standard Settings Economizer Input/Output Logic CO2 Sensor Standard SettingsOperation Troubleshooting 604D--A 30-36 3 Phase with Economizer 604D--A 42-60 3 Phase with Economizer

604D--A specifications

The Bryant 604D--A is a remarkable heating and cooling unit designed for both efficiency and performance, making it an ideal choice for homeowners seeking optimal climate control solutions. Its impressive array of features, technologies, and characteristics sets it apart in the HVAC market.

One of the standout features of the Bryant 604D--A is its advanced two-stage cooling system. This design allows the unit to adjust its cooling output based on the current temperature and humidity levels, which ensures a comfortable indoor environment while optimizing energy consumption. This two-stage operation is particularly beneficial during transitional seasons when temperatures fluctuate, providing a quieter operation and increased efficiency.

The Bryant 604D--A incorporates high-efficiency compressor technology that maximizes cooling capability while minimizing energy usage. This energy-efficient operation is further enhanced by its excellent SEER (Seasonal Energy Efficiency Ratio) rating. By achieving a high SEER rating, the 604D--A not only promotes energy savings but also contributes to lower utility bills, making it an economically sound investment for homeowners.

Another key characteristic of the Bryant 604D--A is its durable construction. Built with quality materials, this unit is designed to withstand varying weather conditions, ensuring longevity and reliable performance over the years. Its robust design also minimizes vibrations and noise, making it a quieter option compared to many competing systems.

Smart technology integration is also a significant highlight of the Bryant 604D--A. It features wireless connectivity, allowing users to control their heating and cooling settings remotely through a smartphone app. This modern convenience enables homeowners to adjust their indoor climate on-the-go, enhancing user comfort and convenience.

Additionally, the Bryant 604D--A is equipped with an advanced filtration system that helps to improve indoor air quality. By capturing dust, pollen, and other particles, this filtration system ensures that the air circulating within the home remains clean and healthy.

In conclusion, the Bryant 604D--A is a high-performance HVAC unit that excels in energy efficiency, durability, and convenience. With its advanced technology, quiet operation, and user-friendly features, it stands as a premier choice for those looking to elevate their home comfort while maintaining cost-effectiveness and sustainability. Whether for new installations or as a replacement for an outdated system, the Bryant 604D--A is undoubtedly a leader in modern climate control solutions.
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