Bryant F Cooling, Condenser Coil, Evaporator Coil, Coil Maintenance and Cleaning Recommendation

Page 6

580J

Changing the Fan Wheel Speed by Changing Pulleys

The horsepower rating of the belt is primarily dictated by the pitch diameter of the smaller pulley in the drive system (typically the motor pulley in these units). Do not install a replacement motor pulley with a smaller pitch diameter than provided on the original factory pulley. Change fan wheel speed by changing the fan pulley (larger pitch diameter to reduce wheel speed, smaller pitch diameter to increase wheel speed) or select a new system (both pulleys and matching belt(s).)

Before changing pulleys to increase fan wheel speed, check the fan performance at the target speed and airflow rate to determine new motor loading (bhp). Use the fan performance tables or use the Packaged Rooftop Builder software program. Confirm that the motor in this unit is capable of operating at the new operating condition. Fan shaft loading increases dramatically as wheel speed is increased.

To reduce vibration, replace the motor’s adjustable pitch pulley with a fixed pitch pulley (after the final airflow balance adjustment). This will reduce the amount of vibration generated by the motor/belt-drive system.

COOLING

!WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

This system uses PuronR refrigerant which has higher 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 refrigerant. If unsure about equipment, consult the equipment manufacturer.

Condenser Coil

The condenser coil is new NOVATION Heat Exchanger Technology. This is an all-aluminum construction with louvered fins over single-depth crosstubes. The crosstubes have multiple small passages through which the refrigerant passes from header to header on each end. Tubes and fins are both aluminum construction. Connection tube joints are copper. The coil may be one-row or two-row. Two-row coils are spaced apart to assist in cleaning. (See Fig. 8.)

TUBES

FINS

MANIFOLD

MICROCHANNELS

C07273

Fig. 8 - NOVATION Heat Exchanger Coils

Evaporator Coil

The evaporator coil is traditional round-tube, plate-fin technology. Tube and fin construction is of various optional materials and coatings (see Model Number Format). Coils are multiple-row.

Coil Maintenance and Cleaning Recommendation

Routine cleaning of coil surfaces is essential to maintain proper operation of the unit. Elimination of contamination and removal of harmful residues will greatly increase the life of the coil and extend the life of the unit. The following maintenance and cleaning procedures are recommended as part of the routine maintenance activities to extend the life of the coil.

Remove Surface Loaded Fibers

Surface loaded fibers or dirt should be removed with a vacuum cleaner. If a vacuum cleaner is not available, a soft non-metallic bristle brush may be used. In either case, the tool should be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges can be easily bent over and damage to the coating of a protected coil) if the tool is applied across the fins.

NOTE: Use of a water stream, such as a garden hose, against a surface loaded coil will drive the fibers and dirt into the coil. This will make cleaning efforts more difficult. Surface loaded fibers must be completely removed prior to using low velocity clean water rinse.

Periodic Clean Water Rinse

A periodic clean water rinse is very beneficial for coils that are applied in coastal or industrial environments. However, it is very important that the water rinse is made with very low velocity water stream to avoid damaging the fin edges. Monthly cleaning as described below is recommended.

6

Page 5 Page 7
Image 6
Page 5 Page 7
Contents Table of Contents Safety ConsiderationsUnit Arrangement and Access GeneralWhat to do if you smell gas Routine Maintenance Seasonal MaintenanceSupply FAN Blower Section Supply Fan Belt-DriveManual Outside Air Hood Screen Adjustable-Pitch Pulley on Motor Supply-Fan Pulley Adjustment BearingsCondenser Coil Coil Maintenance and Cleaning RecommendationCooling Evaporator CoilRoutine Cleaning of Novation Condenser Coil Surfaces Routine Cleaning of Evaporator Coil SurfacesEvaporator Coil Metering Devices Refrigerant System Pressure Access PortsPuronr R-410A Refrigerant Refrigerant ChargeSeatcore Cooling Charging Charts Cooling Charging Charts 08D,F Both CircuitsCooling Charging Charts 12D,F Both Circuits TON Circuit TON Circuit Cooling Service Analysis Problem Cause RemedyTroubleshooting Cooling System Condenser-Fan Adjustment 08D-12D,F sizeCondenser-Fan Adjustment 14D,F size CompressorsUnit-Powered Type Installing Weatherproof CoverNon-Powered Type Convenience OutletsSmoke Detectors Sensor Smoke Detector LocationsSupply Air Return Air Without Economizer Completing Installation of Return Air Smoke SensorFiop Smoke Detector Wiring and Response All UnitsSensor and Controller Tests Dirty Controller Test Procedure Controller Alarm TestController Alarm Test Procedure Dirty Sensor Test ProcedureRemote Test/Reset Station Dirty Sensor Test Detector CleaningSD-TRK4 Remote Alarm Test Procedure Dirty Sensor Test Using an SD-TRK4Troubleshooting Protective Devices Compressor ProtectionGAS Heating System Control CircuitFuel Types and Pressures Combustion-Air Blower Supply Pressure SwitchFlue Gas Passageways Liquid Propane Supply Line Pressure RangesBurners and Igniters Main BurnersOrifice Projection Cleaning and Adjustment Check Unit Operation and Make Necessary AdjustmentsLimit Switch LED Error Code Description LED Indication Error Code DescriptionBurner Ignition Orifice Replacement Gas ValveRed LED-Status Orifice Sizes Altitude CompensationLP Orifice Troubleshooting Heating System Minimum Heating Entering Air TemperatureHeating Service Analysis IGC Board LED Alarm Codes IGCRTU-MP Control System Condenser Coil ServiceRepairing Novation Condenser Tube Leaks Replacing Novation Condenser CoilRTU-MP Multi-Protocol Control Board Typical RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Supply Air Temperature SAT SensorOutdoor Air Temperature OAT Sensor OutputsSpace Temperature SPT Sensors EconoMi$erConnect T-55 Economizer Controls Outdoor Air Enthalpy Control PNO HH57AC077Return Air Enthalpy Sensor Wiring the Indoor Air Quality SensorDifferential Enthalpy Control Indoor Air Quality CO2 SensorWeatherproof Enclosure Connecting Discrete InputsOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Filter StatusPower Exhaust output Communication Wiring ProtocolsProtocol DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1 RTU-MP TroubleshootingCommunication LEDs Baud Rate DS2 DS1LEDs LEDs on the RTU-MP show the status of certain functionsTroubleshooting Alarms Alarms BACnet MS/TPModule Status Report Modstat Example Manufacture Date Basic Protocol TroubleshootingModbus Code Name MeaningECONOMI$ER Systems EconoMi$er IV Component LocationsEconoMi$er IV Wiring EconoMi$er IV Input/Output Logic EconoMi$er IV Functional ViewEconoMi$er IV Control Modes Supply Air Temperature SAT SensorOutdoor Air Lockout Sensor Outdoor Dry Bulb ChangeoverDifferential Dry Bulb Control Outdoor Enthalpy ChangeoverExhaust Setpoint Adjustment Indoor Air Quality IAQ Sensor InputMinimum Position Control Damper Movement ThermostatsDemand Control Ventilation DCV CO2 Sensor Configuration CO2 Sensor Standard SettingsAnalog CO2 EconoMi$er IV Preparation DCV Demand Controlled Ventilation and Power ExhaustEconoMi$er IV Sensor Usage Differential EnthalpyDCV Minimum and Maximum Position Wiring DiagramsEconoMi$er IV Troubleshooting Completion Supply-Air Sensor Input580J Typical Unit Wiring Diagram Power 08D,F, 208/230-3-60 C09157 Unit Preparation PRE-START-UPSTART-UP, General Gas PipingReturn-Air Filters Internal WiringRefrigerant Service Ports Outdoor-Air Inlet ScreensUnit Start Delay Field Service TestConfiguration START-UP, RTU-MP ControlCompressor1 Service Hours Filter Service HoursSupply Fan Service Hours Compressor2 Service HoursInput 1 Function InputSpace Sensor Type Input 2 FunctionHeating, Units Without Economizer Operating SequencesBase Unit Controls Cooling, Units Without Economizer Cooling, Unit With EconoMi$erSupplemental Controls Heating With EconoMi$erDemand Controlled Ventilation RTU-MP Sequence of OperationLocal Schedule Always Occupied Default OccupancyScheduling BACnet SchedulePower Exhaust CoolingEconomizer Demand Limit Fastener Torque ValuesIndoor Air Quality Torque ValuesSerial Number Format Appendix I. Model Number SignificanceModel Number Nomenclature Position NumberAppendix II. Physical Data Physical Data12.5TONS 580J**08 580J**12 580J**14 Gas Connection Heat Anticipator Setting AmpsPhysical Data Heating 12.5TONS Natural Gas Heat, Liquid Propane HeatAppendix III. FAN Performance 580J**08CFM RPM BHP 580J**12 579580J**14 RPM BHPGeneral fan performance notes 1260Pulley Adjustment Unit MOTOR/DRIVE Motor Pulley Turns Open ComboElectrical Information Type DISC. Size Unit Combustion PowerNOM IFM FAN Motor Exhaust No P.E MocpAppendix IV. Wiring Diagram List Wiring DiagramsAppendix V. Motormaster Sensor Locations Catalog No.SM580J---02580J Unit START-UP Checklist Preliminary Information
Top Page Image Contents