Bryant F appendix EconoMi$er IV Sensor Usage, EconoMi$er IV Preparation, Differential Enthalpy

Page 58

580J

Table 24 – EconoMi$er IV Sensor Usage

 

ECONOMI$ER IV WITH OUTDOOR AIR DRY

APPLICATION

BULB SENSOR

 

Accessories Required

Outdoor Air

None. The outdoor air dry bulb sensor is

Dry Bulb

factory installed.

Differential

CRTEMPSN002A00*

Dry Bulb

 

 

 

Single Enthalpy

HH57AC078

Differential

HH57AC078 and CRENTDIF004A00*

Enthalpy

 

 

 

CO2 for DCV

 

 

 

Control using a

33ZCSENCO2

Wall-Mounted

 

 

 

CO2 Sensor

 

 

 

CO2 for DCV

33ZCSENCO2† and

O

 

Control using a

CRCBDIOX005A00††

Duct-Mounted

33ZCASPCO2**

R

CO2 Sensor

 

 

 

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be needed for installation.

† 33ZCSENCO2 is an accessory CO2 sensor.

**33ZCASPCO2 is an accessory aspirator box required for duct-mounted applications.

††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories.

3.Use the Up/Down button to select the preset number. (See Table 23.)

4.Press Enter to lock in the selection.

5.Press Mode to exit and resume normal operation.

The custom settings of the CO2 sensor can be changed anytime after the sensor is energized. Follow the steps below to change the non-standard settings:

1.Press Clear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode.

2.Press Mode twice. The STDSET Menu will appear.

3.Use the Up/Down button to toggle to the NONSTD menu and press Enter.

4.Use the Up/Down button to toggle through each of the nine variables, starting with Altitude, until the desired setting is reached.

5.Press Mode to move through the variables.

6.Press Enter to lock in the selection, then press Mode to continue to the next variable.

Dehumidification of Fresh Air with DCV (Demand Controlled Ventilation) Control

If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level, an energy recovery unit and/or a dehumidification option should be considered.

EconoMi$er IV Preparation

This procedure is used to prepare the EconoMi$er IV for troubleshooting. No troubleshooting or testing is done by performing the following procedure.

NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm resistor, and a 5.6 kilo-ohm resistor which are not supplied with the EconoMi$er IV.

IMPORTANT: Be sure to record the positions of all potentiometers before starting troubleshooting.

1.Disconnect power at TR and TR1. All LEDs should be off. Exhaust fan contacts should be open.

2.Disconnect device at P and P1.

3.Jumper P to P1.

4.Disconnect wires at T and T1. Place 5.6 kilo-ohm resistor across T and T1.

5.Jumper TR to 1.

6.Jumper TR to N.

7.If connected, remove sensor from terminals SO and +. Connect 1.2 kilo-ohm 4074EJM checkout resistor across terminals SO and +.

8.Put 620-ohm resistor across terminals SR and +.

9.Set minimum position, DCV setpoint, and exhaust potentiometers fully CCW (counterclockwise).

10.Set DCV maximum position potentiometer fully CW (clockwise).

11.Set enthalpy potentiometer to D.

12.Apply power (24 vac) to terminals TR and TR1.

Differential Enthalpy

To check differential enthalpy:

1.Make sure EconoMi$er IV preparation procedure has been performed.

2.Place 620-ohm resistor across SO and +.

3.Place 1.2 kilo-ohm resistor across SR and +. The Free Cool LED should be lit.

4.Remove 620-ohm resistor across SO and +. The Free Cool LED should turn off.

5.Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

Single Enthalpy

To check single enthalpy:

1.Make sure EconoMi$er IV preparation procedure has been performed.

2.Set the enthalpy potentiometer to A (fully CCW). The Free Cool LED should be lit.

3.Set the enthalpy potentiometer to D (fully CW). The Free Cool LED should turn off.

4.Return EconoMi$er IV settings and wiring to normal after completing troubleshooting.

DCV (Demand Controlled Ventilation) and Power Exhaust

To check DCV and Power Exhaust:

1.Make sure EconoMi$er IV preparation procedure has been performed.

2.Ensure terminals AQ and AQ1 are open. The LED for both DCV and Exhaust should be off. The actuator should be fully closed.

3.Connect a 9-v battery to AQ (positive node) and AQ1 (negative node). The LED for both DCV and Exhaust should turn on. The actuator should drive to between 90 and 95% open.

4.Turn the Exhaust potentiometer CW until the Exhaust LED turns off. The LED should turn off when the potentiometer is approximately 90%. The actuator should remain in position.

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Contents Table of Contents Safety ConsiderationsGeneral Unit Arrangement and AccessWhat to do if you smell gas Routine Maintenance Seasonal MaintenanceSupply Fan Belt-Drive Supply FAN Blower SectionManual 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 Smoke Detector Locations SensorSupply 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 ProtectionControl Circuit GAS Heating SystemFuel Types and Pressures Combustion-Air Blower Supply Pressure SwitchFlue Gas Passageways Liquid Propane Supply Line Pressure RangesMain Burners Burners and IgnitersOrifice Projection Check Unit Operation and Make Necessary Adjustments Cleaning and AdjustmentLimit Switch LED Indication Error Code Description LED Error Code DescriptionBurner Ignition Orifice Replacement Gas ValveRed LED-Status Altitude Compensation Orifice SizesLP Orifice Minimum Heating Entering Air Temperature Troubleshooting Heating SystemHeating 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 OutputsEconoMi$er Space Temperature SPT SensorsConnect T-55 Economizer Controls Outdoor Air Enthalpy Control PNO HH57AC077Return Air Enthalpy Sensor Wiring the Indoor Air Quality SensorDifferential Enthalpy Control Indoor Air Quality CO2 SensorWeatherproof Enclosure Connecting Discrete InputsOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Filter StatusPower Exhaust output Communication Wiring ProtocolsProtocol DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1 RTU-MP TroubleshootingCommunication LEDs Baud Rate DS2 DS1LEDs LEDs on the RTU-MP show the status of certain functionsTroubleshooting Alarms Alarms BACnet MS/TPModule Status Report Modstat Example Manufacture Date Basic Protocol TroubleshootingModbus Code Name MeaningECONOMI$ER Systems EconoMi$er IV Component LocationsEconoMi$er IV Wiring EconoMi$er IV Input/Output Logic EconoMi$er IV Functional ViewEconoMi$er IV Control Modes Supply Air Temperature SAT SensorOutdoor Air Lockout Sensor Outdoor Dry Bulb ChangeoverDifferential Dry Bulb Control Outdoor Enthalpy ChangeoverIndoor Air Quality IAQ Sensor Input Exhaust Setpoint AdjustmentMinimum Position Control Thermostats Damper MovementDemand Control Ventilation DCV CO2 Sensor Standard Settings CO2 Sensor ConfigurationAnalog CO2 EconoMi$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 ScheduleCooling Power ExhaustEconomizer Demand Limit Fastener Torque ValuesIndoor Air Quality Torque ValuesSerial Number Format Appendix I. Model Number SignificanceModel Number Nomenclature Position NumberPhysical Data Appendix II. Physical Data12.5TONS 580J**08 580J**12 580J**14 Gas Connection Heat Anticipator Setting AmpsPhysical Data Heating 12.5TONS Natural Gas Heat, Liquid Propane Heat580J**08 Appendix III. FAN PerformanceCFM 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

580J*08--14D, F specifications

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