Greenheck Fan 470656 manual Install Suction Line, Mount the Remote Sensing Bulb By Others

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Note

If a hot gas bypass kit was provided by others, refer to the manufacturer’s instructions.

3. Install Suction Line

Install suction line(s) from the compressor to the suction connection(s) which are stubbed through the side of the cabinet.

4.Install the Liquid Line and Thermal Expansion Valve (TEV) (By Others)

Liquid line openings vary by coil size and circuiting and are field-supplied. Follow the TEV recommendations for installation to avoid damaging the valve. If the valve is externally equalized, use

a tubing cutter to cut off the plugged end of the factory-installed equalizer line. Use a de-burring tool to remove any loose metal from the equalizer line and attach it to the TEV. If the valve is internally equalized, the factory-installed equalizer line can be left as is.

 

Suction Header

Coil

 

 

Liquid Line

Distributor

 

 

Equalizer Line

 

 

Nozzle

 

Thermal

Expansion

Valve (by others)

Suction Line

 

Remote Sensing Bulb

Straps

Suction Connection

 

General Installation

5.Mount the Remote Sensing Bulb (By Others)

The expansion valve’s remote sensing bulb should be securely strapped to the horizontal run of the suction line at the 3 or 9 o’clock position and insulated.

6. Check Coil Piping for Leaks

Pressurize the coil to 100 psig with dry nitrogen or other suitable gas. The coil should be left pressurized for a minimum of 10 minutes. If the coil holds the pressure, the hook-up can be considered leak free.

If the pressure drops by 5 psig or less, re-pressurize the coil and wait another 10 minutes. If the pressure drops again, there is likely one or more small leaks which should be located and repaired. Pressure losses greater than 5 psig indicate a large leak that should be isolated and repaired.

7. Evacuate and Charge the Coil

Use a vacuum pump to evacuate the coil and any interconnecting piping that has been open to the atmosphere. Measure the vacuum in the piping using a micron gauge located as far from the pump as possible. Evacuate the coil to 500 microns or less and then close the valve between the pump and the system. If the vacuum holds to 500 microns or less

®

for one minute, the system is ready to be charged or refrigerant in another portion of the system can be opened to the coil. A steady rise in microns would indicate that moisture is still present and that the coil should be further vacuumed until the moisture has been removed.

Note

Failure to obtain a high vacuum indicates a great deal of moisture or a small leak. Break the vacuum with a charge of dry nitrogen or other suitable gas and recheck for leaks. If no leaks are found, continue vacuuming the coil until the desired vacuum is reached.

8. Install the Drain Line

Connect an

unobstructed drain line to the drain pan. A

trap should be used to

 

6 in. min.

Drain

 

prevent sewer gas from

6 in. min.

being drawn into the

Trap

 

unit.

 

 

Important

All traps must be installed below the roof line or be otherwise protected from freezing.

Model IG / IGX Make-Up Air 21

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Contents General Safety Information Installation, Operation and Maintenance ManualReceiving Inspection and Maintenance during StorageHandling StorageClearance to Combustibles / Service Clearances Table of ContentsInstallation of Arrangement DB / HZ Installation of Indoor UnitInstall Combination Curb Adaptor Installation of Roof Mounted Unit Arrangement DBCInstall Curb/Equipment Supports Assemble and Attach WeatherhoodInstall Exhaust Fan Install Exhaust OptionsInstall Supply Unit Installation of Venting for Outdoor Units Installation of Evaporative Cooling Module optionalVenting Methods Installation of Venting for Indoor UnitsStandard Indoor Venting Separated Combustion Concentric VentingInstallation of Standard Indoor Venting Installing Exhaust Vent PipeVent Pipe Diameter Concentric Venting Horizontal Installation of Concentric Venting GeneralConcentric Venting Vertical Intake END Seal Wall Openings Installation of Two Pipe Venting HorizontalSeal Roof Penetration Installation of Two Pipe Venting VerticalInstallation Electrical Wiring Install Economizer Sensors optional Wire the Evaporative Cooler optionalInstall Discharge Air Sensor optional Install DDC Interface OptionalInstall Additional Regulator if Required Installation of Gas PipingDetermine the Supply Gas Requirements Connect the Supply Gas LineInstall the Water Supply Line Installation Evaporative Cooler Piping optionalInstall the Drain Line Check/Adjust Water LevelInstall Normally Closed Supply Line/ Solenoid Installation of Water WizardTM optionalInstall Normally Open Drain Line/ Solenoid Water Wizard Valves When provided by manufacturerInstallation Direct Expansion DX Coil Piping optional Installation of Water WizardWire the Solenoids Wire the Temperature SensorMount the Remote Sensing Bulb By Others Install Suction LineCheck Coil Piping for Leaks Evacuate and Charge the CoilInstallation of Building Pressure Control optional Installation of Chilled Water Coil Piping optionalStart-Up Blower Set-up Optional Components Start-Up Furnaces all units Reset the Temperature SettingStart-Up Single Stage Control Send Unit to High FireStart-Up 81 Staged Control Start-Up 21 Staged ControlSend Unit to Low Fire Check the Low Fire Manifold PressureAccess the Discharge Air Temperature Setting Access the Setpoints MenuEdit the Setting Access the Inlet Air Sensor SettingAccess the Room Override Setting Start-Up 21 Electronic Modulation High Fire AdjustmentExit High Fire Mode Start-Up 41 Electronic ModulationCheck the Low Fire Manifold Pressures Access the Setpoints Menu Start-Up Economizer optional Verify Sensor InstallationSet Minimum Outside Air Set the Enthalpy Changeover Set Point optionalStart-Up Evaporative Cooling optional Start-Up Water Wizard optional Operation - Water Wizard optional External Signal a variable Check Operation VAV Units optionalBuilding Pressure Control Recirculation Operation Check Operation Recirculating Units optionalBuilding Pressure Control a Damper actuator may take a fewExhaust Fan Contact S1 Manually Closed optional Sequence of Operation Staged SequenceSequence of Operation 21 Modulation Sequence Outside Air Temperature OAt Discharge Air Temperature dtSSequence of Operation Modulation Sequence Operation Modulation Staged ControllerProgram Revision Number Sequence of Operation 41 Electronic ModulationOptional Room Override ROt Light Off BlinkingSequence of Operation Electronic Modulation Staging Control Sequence of Operation Sequence of Operation Staged ControlFollowing are the green LED codes of operation Operation and Errors Ignition ControllerOption EC-3 Differential Temperature Control Option EC-1 Outside Air Temperature ReferenceOperation Economizer Option EC-2 Outside Air Enthalpy ReferenceBlower Does Not Operate TroubleshootingMotor Over Amps Too Much Airflow Insufficient AirflowExcessive Noise or Vibration Improper manifold pressure Single or 21 Stage Furnace Will Not LightModulating 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 Water Blows through Evaporative Cooler Evaporative Cooler does not Operate Recirculating pumpAdjust the Manual Supply Valve Adjust the On Time FactorWater Wizard Improper Water Supply Belt Drives Maintenance RoutineSnow Accumulation WheelsFilters MotorsChilled Water Coils Evaporative CoolersMaintenance Fall Flushing Coils Reference Model IGX Venting Connection Location Reference Model IG 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 Performance Table Reference Performance TableStart-Up Checklist Reference Start-Up ChecklistWarranty Maintenance Log