Greenheck IGX - User Manual

Other manuals for Greenheck IGX

Installation, Operation And Maintanance Manual36 pages

Questions and Answers

S
Suzanne WalkerAug 17, 2025
How to troubleshoot a Greenheck IGX compressor that won't start?
- V
  Virginia BerryAug 17, 2025
  If your Greenheck Burner compressor isn't starting, several factors could be at play. First, ensure the disconnect switch or circuit breaker is closed. Check the voltage to the contactor coil, transformer, slave relay, and system, replacing parts if needed. Look for blown fuses or tripped breakers, addressing the cause before replacing them. Verify that the line voltage is within 10% of the compressor's rating, and correct it if necessary. Give the motor thermal protector time to reset (about 2 hours) after it cools down. Also, inspect the wiring for looseness and tighten terminals as needed. If these steps don't resolve the issue, the compressor motor or pressure switch may be defective, or the room thermostat may be open.
J
Johnny RiceAug 22, 2025
Why does my Greenheck IGX Burner compressor start but cut out on low pressure?
- J
  Johnny SimonAug 23, 2025
  If your Greenheck Burner compressor starts but cuts out due to low pressure (activating at 50 psig), it could be due to low or loss of refrigerant charge, restricted airflow, or a restriction in the refrigerant line. Check refrigerant pressures, look for a dirty evaporator coil or filters, closed dampers, an iced evaporator coil, or an improper belt. Also, check motor amps and duct design. Examine refrigerant pressure, and check and adjust the thermal expansion valve. If it's not working correctly, check for a pressure drop across the filter-drier.
F
Frederick RodriguezAug 28, 2025
Why does my Greenheck IGX compressor hum but not start?
- E
  Edward LeeAug 28, 2025
  If your Greenheck Burner compressor hums but doesn't start, possible causes include incorrect wiring, low line voltage, loose wiring, a defective start relay, damaged motor windings, or internal compressor mechanical damage. To troubleshoot, review the wiring schematics, check the voltage, check all connections, and replace the relay. Also, verify amp draws and replace the compressor if necessary.
D
Daniel BaileyAug 31, 2025
What causes high suction pressure in a Greenheck IGX compressor?
- J
  Jillian CherryAug 31, 2025
  High suction pressure in your Greenheck Burner compressor can stem from several issues: an excessive load on the evaporator coil, the compressor being unloaded (if it's a Digital Scroll), an expansion valve sensing bulb not properly secured to the suction line, a thermostatic expansion valve pressure limit feature that's incorrect or inoperative (overfeeding), a room load that's too large, or the system being overcharged. Solutions involve checking for high entering wet bulb temperature and excessive air, checking the Digital Scroll controller signal and solenoid valve, ensuring the thermal expansion valve bulb is insulated and secured, adjusting superheat, reducing the load or adding more equipment, and checking pressures and subcooling.
H
heather45Sep 2, 2025
Why is my Greenheck Burner compressor so noisy or vibrating?
- Z
  zbellSep 3, 2025
  If your Greenheck Burner compressor is excessively noisy or vibrating, the cause might be refrigerant overcharge, liquid floodback, tubing rattle, a scroll compressor rotating in reverse (for 3-phase systems), a worn or damaged compressor, or improper mounting on the unit base. Check pressures and subcooling, and the thermal expansion valve setting. Dampen tubing vibration by taping or clamping, and rewire for opposite rotation if the compressor is rotating in reverse. If the compressor is worn or damaged, replace it. Also, verify that the compressor is properly isolated on the unit base.
K
Kimberly HillSep 5, 2025
How do I troubleshoot high discharge pressure in my Greenheck Burner?
- S
  shelleycraigSep 5, 2025
  To troubleshoot high discharge pressure in your Greenheck Burner, you should check several potential causes. These include the thermal expansion valve setting, a dirty or obstructed air inlet to the condenser, a defective condenser fan motor, too much refrigerant in the system, non-condensables in the system, a dirty condenser coil, a condenser fan not running or running backwards, and high load conditions. Suggested solutions include checking the thermal expansion setting and calibrating superheat/subcooling, checking for proper clearances and possible air recirculating, checking the condenser fan motor, removing excess refrigerant or non-condensables, cleaning the condenser coil, checking the electrical circuit and fuse, and adding more equipment or reducing the load.
R
russellmirandaSep 12, 2025
What causes my Greenheck IGX compressor to short cycle?
- R
  richard79Sep 12, 2025
  A Greenheck Burner compressor that short cycles could be due to several issues: the thermostat location or controls malfunctioning, an improper refrigerant charge, a defective high or low-pressure control, liquid floodback, a defective expansion valve, poor air distribution, high discharge pressure, leaking discharge valves in the compressor, low airflow at the evaporator(s), or an incorrect unit selection (oversized). Solutions involve checking the thermostat and heat anticipator setting, verifying subcooling and superheat, checking the high or low-pressure switch, checking the thermal expansion valve and superheat, checking ductwork for recirculating, checking blower operation and airstream restrictions. For an oversized unit, contact the factory.
K
kevin48Sep 13, 2025
What could cause low discharge pressure in my Greenheck IGX Burner?
- R
  Rebecca FlowersSep 13, 2025
  Low discharge pressure in your Greenheck Burner could be due to an insufficient refrigerant charge, a defective or improperly adjusted expansion valve, low suction pressure, or faulty condenser temperature controls. To resolve this, check subcooling and look for leaks, repairing any leaks and adding refrigerant as needed. Also, check superheating and adjust the thermal expansion valve, and check the condenser controls and reset them to obtain the desired condensing temperature.
M
Mr. Matthew BrewerNov 19, 2025
What to do if Greenheck IGX Burner compressor starts but cuts out on high pressure?
- D
  Dawn MitchellNov 19, 2025
  If your Greenheck Burner compressor starts but then cuts out due to high pressure (activating at 600 psig), consider these potential causes: the system may have a refrigerant overcharge, a defective condenser fan motor, a condenser coil inlet that is obstructed or dirty, air or non-condensables in the system, a defective high-pressure switch, a restriction in the discharge or liquid line, the condensing fan relay not pulling in, or the reheat valve and bypass valve not opening. Suggested solutions include checking pressures and charging by subcooling, checking the fan motor, checking the coil and inlet clearances, checking high side equalized pressures and thermal expansion valves, replacing the high-pressure switch or any defective components, and checking the valves or valve circuit boar...
S
Stephen RogersNov 24, 2025
How do I fix a Greenheck IGX Burner compressor that cuts out on thermal overload?
- I
  ianrobinsonNov 24, 2025
  If your Greenheck Burner compressor is cutting out on thermal overload, several factors could be responsible. Begin by checking the voltage, as low voltage can cause this issue. Sustained high discharge pressure, high suction and discharge pressures, a defective compressor overload, an improper refrigerant charge, incorrect wiring, loose wiring, a defective start relay, or damaged motor windings can also lead to thermal overload. Suggested solutions include checking the running amperage and conditions described under “low suction pressure” symptoms, checking the thermal expansion valve setting and for air in the system, allowing the compressor to cool for two hours before rechecking for an open circuit, checking subcooling, reviewing wiring schematics, checking all connections, and verifyi...

Summary

Unit Lifting Procedures

Indoor Mounted Unit Installation

Install Unit

Position the unit using factory lifting lugs and secure it into place.

Roof Mounted Unit Installation

Roof Mounted Unit with Mixing Box Installation

Install Unit on Curb

Use a crane and spreader bar to lift and center the unit on the curb/supports.

Roof Mounted Unit with Combination Extension Installation

Install Supply Unit

Use crane and spreader bar to lift and center supply unit on curb/supports.

Indoor Unit Venting Instructions

Standard Indoor Venting

Concentric Venting Instructions

Install Concentric Venting Adapter

Detailed steps for determining location, mounting, and connecting pipes for the CVA.

Horizontal Concentric Venting

Vertical Concentric Venting

2-Pipe Horizontal Venting

2-Pipe Vertical Venting

Control Center Layout and Components

Electrical Start-Up Instructions

Unit Wiring Sequence

Steps for connecting power, controls, and wiring to the unit.

Optional Mixing Box Start-Up

Blower System Start-Up Procedures

Blower System Pre-Start Checklist

Check fasteners, fan rotation, and ensure no parts are rubbing.

Key Blower Checks

Verify voltage, blower rotation, vibration, and V-belt drive.

Air Volume and Motor Measurements

Measure air volume (cfm) and motor voltage, amperage, and RPM.

Furnace Start-Up Instructions

Furnace Gas Connection Start-Up

Gas Supply Pressure Requirements

Specifies natural gas and LP gas pressure requirements in inches of water column.

Furnace Control Center Start-Up

Furnace Control Center Components

Identifies and describes the function of each component in the furnace control center.

Furnace Start-Up Procedure

Furnace Initial Start-Up Steps

Steps for turning off power, checking connections, checking manifold pressure, and setting controls.

Furnace Sequence of Operation

Details power-up, standby, heat mode, and lockout recovery sequences.

Furnace Control Settings

High and Low Fire Settings for Staged Burners

Procedure for setting manifold pressure for two-stage gas control at high and low fire.

Electronic Modulation Controls

High and Low Fire Settings for Electronic Modulation

Procedure for setting high and low gas pressures for electronic modulation.

Optional Evaporative Cooling Section Installation

Evaporative Cooling Field Installation

Steps for installing the evaporative cooling section, ensuring it is level and sealed.

Evaporative Cooling Start-Up

Instructions for running overflow, drain lines, and checking pump filter and water level.

Evaporative Cooling Start-Up Details

Auto Drain and Fill with Freeze Protection

Auto Drain and Fill Plumbing Instructions

Steps for installing solenoid valves for auto drain, fill, and freeze protection.

Optional Cooling Coils Start-Up

Water Coil Maintenance and Operation

Instructions for piping, venting, water temperature, and circulation for water coils.

Furnace Troubleshooting

Ignition Control Diagnostic LED Codes

Explains LED indications for different fault conditions like airflow, flame, and ignition lockout.

Airflow Fault Troubleshooting

Reasons for airflow faults and how the control responds.

Flame Fault Troubleshooting

How the system detects and responds to flame faults.

Ignition Lockout Troubleshooting

Possible causes and solutions for ignition lockout, including gas supply and ignition issues.

Evaporative Cooling Troubleshooting

Insufficient Water Volume or Pump Issues

Troubleshooting steps for low water volume or non-operating recirculation pump.

Irregular Water Distribution

Solutions for blocked distribution headers, orifices, or media.

Inadequate Cooling Diagnosis

Checking water distribution, airflow, and wet-bulb temperatures for cooling performance.

Routine Maintenance Procedures

Furnace Maintenance Procedures

Burner and Orifice Cleaning

Inspect and clean burners and orifices before each heating season.

Heat Exchanger Inspection

Check heat exchanger annually for cracks and ensure proper blower operation.

Optional Evaporative Cooling Maintenance

Evaporative Cooling Media Check

Check media for mineral/foreign deposits; adjust bleed-off rate or add chemicals.

Annual Cooling Season Cleaning

Optional Cooling Coils Maintenance

General Coil Maintenance

Winterizing Cooling Coils

Unit Layout and Components

Greenheck IGX Specifications

General

Fuel Type	Natural Gas or Propane
Ignition	Direct Spark Ignition
Control Type	Modulating
Venturi Throat Diameter	Varies by model
Flame Safeguard	UV flame scanner
Type	Induced draft gas burner