Greenheck Fan 470656 manual Start-Up Economizer optional, Verify Sensor Installation

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Start-Up - Economizer (optional)

Note

To prevent premature heat exchanger failure, do not locate units where chlorinated, halogenated, or acid vapors are present.

Note

Units with an economizer are designed for either 0-30% outside air (HV-1), 31-75% outside air (HV‑2) or 100% return air (HV-3). Refer to the CAPS submittal for the unit’s ventilation type.

Note

HV-1 and HV-2 use economizer controls (EC) or (MB).

Note

Economizer control may use outside air temperature reference (EC-1), outside enthalpy reference (EC‑2), differential temperature reference (EC-3) or differential temperature reference (EC-4).

Note

Economizer control may use a potentiometer (MB‑1), 2-10 VDC signal (MB-2), 4-20mA signal (MB‑3) or a manual quadrant (MB-4).

1. Verify Sensor Installation

All economizer options (EC) require an outdoor air temperature or enthalpy sensor to be field-installed inside of the weatherhood and field-wired to terminals SO+ and SO- on the economizer.

Economizer options EC-3 and EC-4 require an outdoor air temperature or enthalpy sensor to be field-installed in the return air duct and field-wired to terminals SR+ and SR- on the economizer.

Verify that all economizer sensors needed for your application are properly installed and wired.

2. Set Minimum Outside Air

Set the minimum outside air position. HV-1 is designed for 0-30% outside air and HV-2 is designed for 31-75% outside air.

All economizer options, EC-1, EC-2, EC-3 and EC-4 and option MB-1 use a potentiometer to set the minimum outside air damper position.

The potentiometer is located on the economizer for options EC-1, EC-2, EC-3 and EC-4. The potentiometer may be factory-mounted in the unit control center or field-mounted in the space for option MB-1.

MB-2 and MB-3 use an external signal from a building management system to position the dampers.

MB-4 uses a manual quadrant located on the inlet damper to position the dampers.

32Model IG / IGX Make-Up Air

important

The outside air volume must be measured and compared to the total air volume when setting the minimum outside air. The minimum outside air should never be set based on the inlet damper or potentiometer position.

3.Set the Enthalpy Changeover Set Point (optional)

If using an economizer, the enthalpy changeover setting must be set. If differential temperature or differential enthalpy control is used, set the enthalpy changeover set point to D. If outside air temperature or enthalpy reference is used, set the enthalpy changeover set point to the desired setting from the following table.

Enthalpy Changeover Setting

Setting

Changeover

Temperature* (°F)

 

 

 

A

73

 

 

B

70

 

 

C

67

 

 

D

63

 

 

*Temperature at 50% relative humidity, see the Honeywell W7212 Economizer instructions for set points at other humidities

Note

For options EC-3 and EC-4 the enthalpy changeover set point is the temperature at which the economizer will send the dampers to the minimum outside air position.

4. Program Optional Room Stat

Program the optional room stat. Separate detailed instructions for programming the room stat ship with the optional room stat.

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Contents Installation, Operation and Maintenance Manual General Safety InformationInspection and Maintenance during Storage ReceivingHandling StorageTable of Contents Clearance to Combustibles / Service ClearancesInstallation of Indoor Unit Installation of Arrangement DB / HZInstallation of Roof Mounted Unit Arrangement DBC Install Combination Curb AdaptorInstall Curb/Equipment Supports Assemble and Attach WeatherhoodInstall Supply Unit Install Exhaust FanInstall Exhaust Options Installation of Evaporative Cooling Module optional Installation of Venting for Outdoor UnitsInstallation of Venting for Indoor Units Venting MethodsStandard Indoor Venting Separated Combustion Concentric VentingVent Pipe Diameter Installation of Standard Indoor VentingInstalling Exhaust Vent Pipe Installation of Concentric Venting General Concentric Venting HorizontalConcentric Venting Vertical Intake END Installation of Two Pipe Venting Horizontal Seal Wall OpeningsInstallation of Two Pipe Venting Vertical Seal Roof PenetrationInstallation Electrical Wiring Wire the Evaporative Cooler optional Install Economizer Sensors optionalInstall Discharge Air Sensor optional Install DDC Interface OptionalInstallation of Gas Piping Install Additional Regulator if RequiredDetermine the Supply Gas Requirements Connect the Supply Gas LineInstallation Evaporative Cooler Piping optional Install the Water Supply LineInstall the Drain Line Check/Adjust Water LevelInstallation of Water WizardTM optional Install Normally Closed Supply Line/ SolenoidInstall Normally Open Drain Line/ Solenoid Water Wizard Valves When provided by manufacturerInstallation of Water Wizard Installation Direct Expansion DX Coil Piping optionalWire the Solenoids Wire the Temperature SensorInstall Suction Line Mount the Remote Sensing Bulb By OthersCheck Coil Piping for Leaks Evacuate and Charge the CoilInstallation of Chilled Water Coil Piping optional Installation of Building Pressure Control optionalStart-Up Blower Set-up Optional Components Reset the Temperature Setting Start-Up Furnaces all unitsStart-Up Single Stage Control Send Unit to High FireStart-Up 21 Staged Control Start-Up 81 Staged ControlSend Unit to Low Fire Check the Low Fire Manifold PressureAccess the Setpoints Menu Access the Discharge Air Temperature SettingEdit the Setting Access the Inlet Air Sensor SettingAccess the Room Override Setting High Fire Adjustment Start-Up 21 Electronic ModulationCheck the Low Fire Manifold Pressures Exit High Fire ModeStart-Up 41 Electronic Modulation Access the Setpoints Menu Verify Sensor Installation Start-Up Economizer optionalSet Minimum Outside Air Set the Enthalpy Changeover Set Point optionalStart-Up Evaporative Cooling optional Start-Up Water Wizard optional Operation - Water Wizard optional Building Pressure Control External Signal a variableCheck Operation VAV Units optional Check Operation Recirculating Units optional Recirculation OperationBuilding Pressure Control a Damper actuator may take a fewSequence of Operation Staged Sequence Exhaust Fan Contact S1 Manually Closed optionalSequence of Operation 21 Modulation Sequence Discharge Air Temperature dtS Outside Air Temperature OAtSequence of Operation Modulation Sequence Operation Modulation Staged ControllerSequence of Operation 41 Electronic Modulation Program Revision NumberOptional Room Override ROt Light Off BlinkingSequence of Operation Electronic Modulation Sequence of Operation Staged Control Staging Control Sequence of OperationOperation and Errors Ignition Controller Following are the green LED codes of operationOption EC-1 Outside Air Temperature Reference Option EC-3 Differential Temperature ControlOperation Economizer Option EC-2 Outside Air Enthalpy ReferenceTroubleshooting Blower Does Not OperateMotor Over Amps Insufficient Airflow Too Much AirflowExcessive Noise or Vibration Single or 21 Stage Furnace Will Not Light Improper manifold pressureModulating Furnace Will Not Light Heat transformer TR2 fault Ignition controllers IC# failed Staged Furnace Will Not Light Internal high limit tripped temperature above set point Evaporative Cooler does not Operate Recirculating pump Water Blows through Evaporative CoolerWater Wizard Improper Water Supply Adjust the Manual Supply ValveAdjust the On Time Factor Maintenance Routine Belt DrivesSnow Accumulation WheelsMotors FiltersChilled Water Coils Evaporative CoolersMaintenance Fall Flushing Coils Reference Model IG Venting Connection Location Reference Model IGX Venting Connection LocationReference Model IG Single or 2 Stage Reference Model IG Staged Reference Model IG Modulation Modulating Reference Model IGX Blower Control Center Manifold Gas Pressure Test Port Staged Inch Gas Supply Manifold Gas Pressure Test Port Modulating Staged Reference Performance Table Performance TableReference Start-Up Checklist Start-Up ChecklistMaintenance Log Warranty
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