Bryant 580F Indoor Air Humidity Sensor, Occupied/Unoccupied Switch, Power Exhaust

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L. Indoor Air Humidity Sensor

For differential enthalpy sensing, the EconoMi$er+ control- ler uses the standard outdoor air temperature sensor, the outdoor air humidity sensor, and the optional indoor air humidity sensor, an optional return air temperature sensor (RAT). The indoor-air humidity sensor is provided with a 2-wire, 42-in. wiring harness with a 2-pin connector. The plug is installed on pins 8 and 9 on J3 of the EconoMi$er+ controller. The pins are labeled IRH and VREF on the EconoMi$er+ controller. See Fig. 22. The orange wire of the harness is connected to pin 8 (IRH). The blue wire of the har- ness is connected to pin 9 (VREF). The wiring harness should be extended with wires and wire nuts and routed from the EconoMi$er+ controller to the sensor location. The EconoMi$er+ controller compares the outdoor air enthalpy to the return air enthalpy to determine EconoMi$er+ use. The controller selects the lower enthalpy air (return or out- door) for cooling. For example, when the outdoor air has a lower enthalpy than the return air, the EconoMi$er+ control- ler opens the damper to bring in outdoor air for free cooling.

ECONOMI$ER+

ECONOMI$ER+

CONTROLLER

GROMMET

RETURN AIR

HUMIDITY SENSOR

RETURN DUCT (FIELD-PROVIDED)

Mount the return-air humidity sensor in the return-air duct. See Fig. 31.

The outdoor enthalpy changeover curve is set with at the EconoMi$er+ controller. The selectable curves are A, B, C, and D. The factory default is curve “A.” See Fig. 29. See Fig. 30 for Sensor Curve vs. Humidity.

M. Occupied/Unoccupied Switch

The EconoMi$er+ supports the use of a field-supplied occupied/unoccupied switch. When the switch is closed it pro- vides a 24-vac signal to the unit for occupied mode and when open, there is no signal to indicate unoccupied mode. The control can be configured to allow different minimum econo- mizer damper positions and to control how mechanical cool- ing will and will not be used in the occupied mode.

NOTE: The remote potentiometer (see below) will override the occupied minimum position if the potentiometer setting is greater than the occupied minimum position.

A wire from J1-OCC (pin 4) and a wire from J1-24V (pin 5) are wire-nutted together to jumper the terminals.

An occupied/unoccupied switch can be field-installed in place of the jumper to allow the user to force the control into occupied or unoccupied mode of operation for EconoMi$er+ damper position. The occupied/unoccupied switch is required if the user wants to use unoccupied free cooling or different EconoMi$er+ damper vent positions in the unoccupied mode.

N. Power Exhaust

Refer to the Accessory Power Exhaust installation instruc- tions for information on installing the power exhaust accessory.

O. Remote EconoMi$er+ Enable Control

When the control is used with energy management systems that enable and disable the EconoMi$er+, the user can install a field-supplied enable/disable switch. The switch must be wired in series with a 3K ohm, 1 watt or greater resistor. The switch is wired to terminals ORH (pin 11) and VREF (pin 12) on J3. Refer to the Start-Up section for details on how to configure the control.

P. Remote Potentiometer Occupied Minimum Position

The occupied minimum position set point remote potentiom- eter (field-supplied) is used when requiring additional tem- porary ventilation. The remote potentiometer (10K ohm - closed damper, 100K ohm - open damper) will only control the occupied minimum position.

Fig. 31 — Return Air Humidity Sensor

The accessory 5-in wiring plug, CRE+PLUG001A00 is required to connect the potentiometer.

The plug is installed on pins 15, 16 and 17 on J3 of the EconoMi$er+ controller. The pins are labeled with the ground symbol, MIN and VREF on the EconoMi$er+ control- ler. See Fig. 22. The pink wire from the harness is connected to pin 15 (ground symbol). The gray wire from the harness is connected to pin 16 (MIN). The yellow wire from the harness is connected to pin 16 (VREF). The wiring harness should be extended with wires and wire nuts and routed from the EconoMi$er+ controller to the remote potentiometer location.

NOTE: Pins 13 (ground symbol) and 14 (IAQ), which are wired to the accessory 5-pin plug, are not used for the remote potentiometer installation. They are used for an accessory IAQ sensor (if required).

The unoccupied minimum position can only be set at the controller. The occupied minimum position set point config- ured at the EconoMi$er+ controller should be set to 0 when using a remote potentiometer. The occupied minimum posi- tion will also be used as part of the IAQ routing; it will be the maximum position the damper moves to when there is an IAQ call.

If the remote potentiometer (occupied) position is greater than the EconoMi$er+ controller unoccupied minimum posi- tion, then the remote potentiometer setting will be used. The remote potentiometer is field supplied and must be a 3-wire, linear potentiometer with a resistance between 10K ohm and 100K ohm (such as the Honeywell S963B1128).

Q. Demand Ventilation Control

Demand ventilation control uses an IAQ sensor (CRE+PLUG001A00 required) to control the amount of out- side air admitted into the system. Normally, the minimum position of the EconoMi$er+ damper is established based on the demand occupancy of the space. The IAQ sensor will be used to modulate the EconoMi$er+ minimum damper position below the normal minimum position based on full occupancy. The lower limit is called the base ventilation rate. See Fig. 32.

If there is no IAQ signal the damper will be in the unoccu- pied minimum position (configuration item number 3). If there is an IAQ signal the damper will be in the occupied

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Contents Safety Considerations Important Read Before InstallingContents InstallationBase Unit Dimensions 580F036-072 Base Unit Dimensions 580F073 II. Field Fabricate Ductwork III. Install External Trap for CONDEN- Sate DrainAlternate Unit Support IV. RIG and Place UnitPKG. Accy Hole Power Unit Size Accessory CRRFCURB001A01Connector ALT Accessory Drain GAS CRRFCURB002A01Install Flue Hood VI. Install GAS PipingUnit 580F MAX Weight Rigging DetailsPhysical Data OUTDOOR-AIR Inlet Screens Furnace SectionFreeze Protection Thermostat F RETURN-AIR FiltersHeat Anticipator Settings Field Power SupplyField Control Wiring VII. Make Electrical ConnectionsPower Wiring Connections Electrical Data Without Convenience Outlet RLA LRA FLA MCA MOCP†Electrical Data With Convenience Outlet VIII. Adjust FACTORY-INSTALLED Options Manual Outdoor-Air DamperHood BOX Optional EconoMi$er+Bracket OAT OarhIAQ IarhDamper Movement EconoMi$er+ Controller WiringThermostats Supply Air Temperature SAT Sensor Provided EconoMi$er+ Field-Installed AccessoriesOutdoor Air Temperature OAT Sensor Provided Return Air Temperature RAT SensorIndoor Air Quality Voltage Setting Outdoor Air Humidity SensorTemperature Resistance Range ResolutionEnthalpy Changeover Settings Remote EconoMi$er+ Enable Control Occupied/Unoccupied SwitchPower Exhaust Indoor Air Humidity SensorVentilation Rate CO2 Sensor ConfigurationFull Occupancy Ventilation for PeopleDirect-Drive Motors IX. Adjust EVAPORATOR-FAN SpeedBelt-Drive Motors Fan Rpm at Motor Pulley Settings Motor Data870 External Static Pressure in. wg Cfm Rpm Bhp Watts 900768 9581181 970 External Static Pressure in. wg Cfm Rpm Bhp Watts955 1073802 370 Low Speed840 432 773 802 370 912 489624 935757 967 579663 856884 Airflow Low Speed High SpeedBhp Watts 900 941762 886 517 969 644 859 458 944 579705 777866 479 790 353828 413 790 353 896 470 990 599905 553 1000 687 1085 831 828 413 930 535 1021 669866 479 964 607 1053 746 944 635 1036 775 1119 924986 771867 966PRE-START-UP IV Internal WiringVI. Refrigerant Service Ports START-UP Unit PreparationMain Burners IX. CoolingXI. Heating XIII. Ventilation Continuous FAN XII. Safety ReliefXIV. ECONOMI$ER+ Controller Thermostat Inputs DS1 DS2 DS3 DS4Input Name Type USE INPUT/OUTPUT Conversion Connection PIN Economizer MotorConfiguration Variables Read and Setup Modes Start-Up Mode SequenceInput/Output Channels Setup Mode Error Mode Manual ModeXV. ECONOMI$ER+ Configuration Compressor Configuration and Control Ventilation Air and Free CoolingXVI. Operating Sequence Demand Ventilation ConfigurationPower Exhaust Configuration Cooling, Units without EconoMi$er+Heating, Units without EconoMi$er+ Cooling, Units with EconoMi$er+Service Cleaning II. Lubrication III. Blower Belt AdjustmentECONOMI$ER+ Adjustment IV. Manual OUTDOOR-AIR DamperXIV. Loss of Charge Switch Limit SwitchXIII. HIGH-PRESSURE Switch XVI. Replacement PartsSuction Line Pressure Kilopascals Suction Line Temperature DEG. CSuction Line Temperature DEG. F Suction Line Pressure PsigTON Unit 60 Hz Charging Chart Burner Section Details Troubleshooting ECONOMI$ER+ Troubleshooting II. Unit Troubleshooting Error Code 8 E2 Test FailureUnit Always in Unoccupied Mode RAM Test FailureLED Error Code Service Analysis Heating Service AnalysisCooling Service Analysis GVR FPTGND HPSStartup Mode Appendix a ECONOMI$ER+ LabelAppendix a ECONOMI$ER+ Label Appendix B JOB Specific ECONOMI$ER+ Configuration Settings Index Service Training Call for Free CatalogPage Preliminary Information START-UP ChecklistTemperatures III. START-UP Electrical
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580F specifications

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