® Installation, Operation and Maintenance Manual Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! General Safety Information Only qualified personnel should install this unit. Personnel should have a clear understanding of these instructions and should be aware of general safety precautions. Improper installation can result in electric shock, possible injury due to coming in contact with moving parts, as well as other potential hazards. Other considerations may be required if high winds or seismic activity are present. If more information is needed, contact a licensed professional engineer before moving forward. 1. Follow all local electrical and safety codes, as well as the National Electrical Code (NEC), the National Fire Protection Agency (NFPA), where applicable. Follow the Canadian Electrical Code (CEC) in Canada. 2. The rotation of the wheel is critical. It must be free to rotate without striking or rubbing any stationary objects. 3. Motor must be securely and adequately grounded. 4. Do not spin fan wheel faster than the maximum cataloged fan rpm. Adjustments to fan speed significantly affects motor load. If the fan RPM is changed, the motor current should be checked to make sure it is not exceeding the motor nameplate amps. 5. Do not allow the power cable to kink or come in contact with oil, grease, hot surfaces, or chemicals. Replace cord immediately if damaged. 6. Verify that the power source is compatible with the equipment. 7. Never open blower access doors while the fan is running. ® Direct Spark Ignition Make-Up Air DANGER Always disconnect power before working on or near a unit. Lock and tag the disconnect switch or breaker to prevent accidental power up. CAUTION When servicing the unit, motor may be hot enough to cause pain or injury. Allow motor to cool before servicing. FOR YOUR SAFETY If you smell gas: 1. Open windows. 2. Do not touch electrical switches. 3. Extinguish any open flame. 4. Immediately call your gas supplier. FOR YOUR SAFETY The use and storage of gasoline or other flammable vapors and liquids in open containers in the vicinity of this appliance is hazardous. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment. Direct Spark Ignition Make-Up Air Document 470652 Model DG and DGX 1 Table of Contents Previous Page Next Page
1
2
3
4
5
Table of Contents
Frequently Asked Questions (21)
What is the best way to clean a Greenheck DG Fan?
The best way to clean a Greenheck DG Fan involves cleaning specific components:
Wheels and Housing: The wheel and housing should be cleaned to ensure proper operation, especially if oil and dust accumulate causing imbalance.
Motors: Motor maintenance is generally limited to cleaning exterior surfaces. Removing dust and grease build-up on the motor assures proper motor cooling.
Filters: If you have aluminum mesh filters, they can be washed in warm soapy water.
Evaporative Coolers: The media should be periodically brushed lightly with a soft bristle brush in an up and down motion while flushing with water to reduce mineral build-up. For large amounts of mineral build-up, clean or replace the media. Clean all interior parts of any mineral deposits or foreign materials that may have built-up during the cooling season.
Cooling Coils: If the coil surface needs cleaning, clean the coil from the leaving air-side to ensure foreign material is washed out. Inspect and clean the drain pan to prevent the growth of algae and other organisms.
Burner: Inspect the burner for accumulation of scales on the mixing plates. Any scaling or foreign material should be removed with a wire brush. Visually check that all holes in the mixing plates are clear, and if any burner ports are plugged, clear them with a piece of wire or another appropriate tool. Inspect and clean the flame and spark rod.
Read moreWas this helpful? Yes No
Are there ways to make a Greenheck DG Fan operate more quietly?
To make your Greenheck DG Fan operate more quietly, address potential sources of excessive noise or vibration:
Belts: If belts are worn or loose, they should be replaced or tightened.
Sheaves: If sheaves are not aligned, they need to be aligned.
Wheels: If the wheel(s) are unbalanced, they should be cleaned and/or balanced.
Bearings: If bearings are worn or need lubrication, they should be replaced or lubricated as needed.
Wheel Rubbing: If the wheel(s) are rubbing on the inlet, the wheel(s) or inlet should be adjusted.
Ductwork: To minimize noise transmitted through ductwork, the use of heavy canvas duct connectors is recommended.
Read moreWas this helpful? Yes No
Why is my Greenheck DG Fan not working?
If your Greenheck DG Fan is not working (blower does not operate), you can troubleshoot the issue by checking the following:
Power Supply:
Verify proper supply power at the main disconnect.
Ensure the main disconnect (DS1) is On.
Check if primary fuses are blown.
Confirm 24 VAC between terminals R and X; if not, the main transformer (TR1) may be defective.
Confirm 24 VAC between terminals G and X; if not, the supply switch (S2) may be Off.
Confirm 24 VAC across terminals 3 and X; if not, the fire system contact (FSC) may be tripped or not installed.
Confirm 24 VAC across terminals 4 and X.
Confirm 24 VAC across A2 and A1 on supply contactor (ST1).
Overloads and Interlocks:
Check if the supply fan overload (ST1 OL) is tripped; if so, reset it and check motor amps.
Verify that optional exhaust fan interlocks (ST2-ST5) are not open.
Check if the (optional) freeze protection (RT4) is tripped.
Dampers:
Ensure the (optional) damper limit switch (DL1) is not holding (wait for actuator to open fully or adjust limit switch).
Check if the (optional) damper limit switch jumper is missing.
Fan Components:
Check if the fan relay (RF) is not energized.
Inspect for a broken fan belt.
Check for a defective motor or capacitor.
Verify if the motor fuse is blown.
Ensure that one or more legs of 3 phase is not out (if applicable).
For more information, see page 25 of the manual. Read moreWas this helpful? Yes No
What type of maintenance schedule is recommended for a Greenheck DG Fan?
The recommended maintenance schedule for a Greenheck DG Fan varies by component:
V-Belt Drives: Must be checked on a regular basis for wear, tension, alignment, and dirt accumulation.
Bearings: Should be lubricated prior to periods of extended shutdowns or storage. The shaft should be rotated monthly to aid in corrosion prevention. If stored for more than three months, purge the bearings with new grease prior to start-up. A Recommended Bearing Lubrication Schedule (in months) is provided based on fan RPM and bearing bore size.
Evaporative Cooler Media: Should be periodically brushed lightly with a soft bristle brush and flushed with water. The bleed-off rate should be adjusted based on the media's mineral deposits after two weeks of service.
Gas Train: Gas connections, joints, and valves should be checked annually for tightness.
Read moreWas this helpful? Yes No
How frequently should a Greenheck DG Fan be cleaned?
The recommended cleaning frequency varies by component:
V-Belt Drives: Must be checked on a regular basis for wear, tension, alignment, and dirt accumulation.
Evaporative Cooler Media: Should be periodically brushed lightly with a soft bristle brush and flushed with water. The bleed-off rate should be adjusted based on the media's mineral deposits after two weeks of service.
Gas Train: Gas connections, joints, and valves should be checked annually for tightness.
Read moreWas this helpful? Yes No
My Greenheck DG Fan motor is running, but the fan is not spinning. What's wrong?
If your Greenheck DG Fan motor is running but the fan is not spinning, the most likely cause is a broken fan belt. You should inspect the V-belt drives for wear, tension, alignment, and dirt accumulation. If the belt is broken, it needs to be replaced.
Read moreWas this helpful? Yes No
How can I improve the performance or effectiveness of my Greenheck DG Fan?
To improve the performance or effectiveness of your Greenheck DG Fan, consider the following:
Airflow Optimization:
Adjust damper linkage(s) or replace faulty actuator(s).
Reduce losses by improving ductwork.
Adjust drives as needed to optimize blower speed.
Clean or replace filters.
Repair leaks in ductwork.
If airflow is too much, install filters or increase external static pressure.
Ensure the blower is rotating in the correct direction, as incorrect rotation will hinder performance.
Motor and Drive Maintenance:
Replace or tighten the belt if it is slipping.
Remove dust and grease build-up on the motor to ensure proper motor cooling.
Filter Maintenance:
If using aluminum mesh filters, an adhesive spray can be added to increase their efficiency.
Evaporative Cooler Maintenance (if applicable):
Periodically brush and flush the media with water to reduce mineral build-up.
Clean or replace the media for large amounts of mineral build-up.
Cooling Coil Maintenance (if applicable):
Maintain adequate fluid velocities and proper filtering of the fluid.
Periodically vent the coil to remove accumulated air if automatic air vents are not used.
Burner Maintenance:
Inspect and clean the flame and spark rod regularly; occasional replacement may be necessary for optimum unit performance.
Read moreWas this helpful? Yes No
What should I do if my Greenheck DG Fan is making a rattling noise?
If your Greenheck DG Fan is making a rattling noise, it falls under excessive noise or vibration. You can troubleshoot and resolve this by checking the following:
Belts: If belts are worn or loose, they should be replaced or tightened.
Sheaves: If sheaves are not aligned, they need to be aligned.
Wheels: If the wheel(s) are unbalanced, they should be cleaned and/or balanced.
Bearings: If bearings are worn or need lubrication, they should be replaced or lubricated as needed.
Wheel Rubbing: If the wheel(s) are rubbing on the inlet, the wheel(s) or inlet should be adjusted.
For more information, see page 28 of the manual. Read moreWas this helpful? Yes No
How can I verify if my Greenheck DG Fan is operating correctly?
To verify if your Greenheck DG Fan is operating correctly, perform the following checks:
General Checks:
Check tightness of all factory wiring connections.
Verify control wiring wire gauge.
Hand-rotate blower to verify free rotation.
Verify supply voltage to the main disconnect.
Verify the supply gas pressure.
Verify remote controls wiring.
Blower Checks:
Check line voltage.
Check blower rotation.
Check for vibration and unusual noise or overheating of bearings.
Measure the motor's voltage, amps, and RPM and compare to specifications.
Measure the unit's air volume (cfm) and compare it with its rated air volume.
Check supply fan RPM, motor nameplate amps, actual motor amps, and actual CFM delivered.
Gas System Checks:
Check the supply gas pressure and compare it with the unit's nameplate requirements.
Measure the static pressure across the burner (Burner Air Pressure Differential).
Evaporative Cooler Checks (if applicable):
Check media orientation.
Check for proper water flow to distribution headers.
Check for distribution header orientation to prevent water spillage.
Check the media after one hour of operation to ensure it is not continuously dry or draining too much water.
Read moreWas this helpful? Yes No
What are the common applications for the Greenheck DG Fan?
The Greenheck DG Fan is a Direct Spark Ignition Make-Up Air unit. Common applications include:
Kitchen applications.
Environments where a building's exhaust volume may vary, utilizing variable volume operation.
As a primary source of heating for the space, especially with the recirculation option.
Read moreWas this helpful? Yes No
How can I fix a Greenheck DG Fan that is running slowly?
If your Greenheck DG Fan is running slowly, which may manifest as insufficient airflow or a blower speed that is too low, you can address this by:
Adjusting the drives as needed.
If the measured air volume is off, adjust the fan's RPM by changing/adjusting the drive.
Read moreWas this helpful? Yes No
How do I reset a Greenheck DG Fan if it malfunctions?
If your Greenheck DG Fan malfunctions, you may need to reset specific components:
If the supply fan overload (ST1 OL) is tripped, you should reset it and check the motor amps.
If the (optional) freeze protection (RT4) is tripped, you should reset it.
If the high limit (HLC1) is tripped, you should reset or replace it and check the cause of control loss.
If the (optional) high/low gas pressure switch(es) (PS3 and PS4) are tripped, you should correct the gas pressure and reset them.
Read moreWas this helpful? Yes No
How is a Greenheck DG Fan typically activated or turned on?
A Greenheck DG Fan is typically activated by closing electrical contacts:
The exhaust fan starts when its contact (S1) is closed.
The supply fan starts when its contact (S2) is closed.
For more information, see page 24 of the manual. Read moreWas this helpful? Yes No
Is it possible to increase the speed of a Greenheck DG Fan?
Yes, it is possible to increase the speed of a Greenheck DG Fan. If the blower speed is too low or the measured air volume is off, you can adjust the drives as needed or adjust the fan's RPM by changing/adjusting the drive.
Read moreWas this helpful? Yes No
Why is my Greenheck DG Fan blowing air downwards instead of exhausting it?
If your Greenheck DG Fan is blowing air in the wrong direction, it may be due to incorrect blower rotation. The unit may move some air, but it will not perform as designed. You should perform a visual inspection to ensure the correct blower rotation.
To correct the blower rotation:
For three-phase units, disconnect and lock out the power, then interchange any two power leads.
For single-phase units, disconnect and lock out the power, then rewire the motor per the manufacturer's instructions.
For more information, see page 15 of the manual. Read moreWas this helpful? Yes No
How does the Greenheck DG Fan handle different temperature environments?
The Greenheck DG Fan handles different temperature environments through various optional components and operational procedures:
Temperature Sensors: It can be equipped with Heating Inlet Air Sensors (typically set to 60-70°F) and Cooling Inlet Air Sensors (typically set to 75°F).
Freeze Protection:
A Building Freeze Protection feature (typically set to 5 minutes; 45°F) is available.
For evaporative coolers, an inlet air sensor overrides and shuts down the cooler if the outside temperature falls below the minimum cooling temperature.
The Freeze Temperature (typically 45°F) causes the supply solenoid to close and the drain solenoid to open to drain the supply line and prevent freeze damage.
The auto drain and fill system for evaporative coolers protects from freezing by draining the sump tank and supply line when outside temperatures fall below 45°F.
Chilled Water Coils: During winter, chilled water coils need to be protected against freezing by either blowing out the coils or flushing them. The use of inhibited glycol is recommended to protect coils against freezing and provides corrosion protection.
Read moreWas this helpful? Yes No
Can the airflow direction of a Greenheck DG Fan be reversed?
Yes, the airflow direction can be reversed by changing the blower's rotation:
For three-phase units, disconnect and lock out the power, then interchange any two power leads.
For single-phase units, disconnect and lock out the power, then rewire the motor per the manufacturer's instructions.
For more information, see page 15 of the manual. Read moreWas this helpful? Yes No
Are there specific safety guidelines to follow when operating a Greenheck DG Fan?
Yes, there are several safety guidelines to follow when operating, installing, and maintaining a Greenheck DG Fan:
General Safety:
Disconnect and lock out all power and gas before performing any maintenance or service to the unit to prevent serious injury or death.
Lock out the gas and electrical power to the unit before any maintenance or service operations.
Follow the start-up procedure in the exact order for proper unit function and safety.
Electrical Safety:
All wiring must be done in accordance with the latest edition of the National Electric Code ANSI/NFPA 70 and any local codes, and in Canada, with the Canadian Electrical Code.
The equipment must be properly grounded.
Any wiring running through the unit in the airstream must be protected by metal conduit, metal clad cable or raceways.
High voltage electrical input is needed for this equipment; this work should be performed by a qualified electrician.
Any wiring deviations may result in personal injury or property damage.
Gas Piping Safety:
All gas piping must be installed in accordance with the latest edition of the National Fuel Gas Code ANSI/Z223.1 and any local codes, and in Canada, with the Installation Code for Gas Burning Appliances and Equipment (CGA B149) and Provincial Regulations.
All gas-fired heating unit components must be leak tested with a soap and water solution prior to operation; NEVER test for gas leaks with an open flame.
Do NOT connect the unit to gas types other than what is specified or to gas pressures outside the range shown on the label.
Mechanical Safety:
Protective equipment such as safety glasses, steel toe boots, and gloves are recommended during installation and maintenance.
Check the housing, blower, and ductwork for any foreign objects before running the blower.
Do not enlarge burner ports when clearing a blockage as performance could be affected.
Water Wizard™ (Optional):
Be aware of the water level in the sump tank at all times when using Flow Test Mode.
The sump drain line must be clear and draining to a safe location before using Flow Test Mode.
Changing default settings can significantly affect performance; only change settings after reading and understanding the manual.
For more information, see pages 7, 8, 11, 15, 16, 21, 33 and 35 of the manual. Read moreWas this helpful? Yes No
What kind of motor does the Greenheck DG Fan use?
The Greenheck DG Fan can use different types of motors:
It can be equipped with single-phase or three-phase motors.
Some units utilize Variable Frequency Drive (VFD) motors or single speed motors to control air volumes.
Read moreWas this helpful? Yes No
What does a blinking light on my Greenheck DG Fan indicate?
Blinking lights on your Greenheck DG Fan indicate specific statuses, particularly for the optional Water Wizard™ and Flame Safeguard:
Water Wizard™ Indicating Lights: Located across the top of the display:
L1 blinking indicates an outdoor temperature lockout.
L2 blinking is not applicable (N/A) for indicating status.
L3 blinking indicates that flow test mode is active.
Flame Safeguard: The power light on the flame safeguard should blink approximately every 5 seconds as it performs a self-diagnostics check.
Read moreWas this helpful? Yes No
Can the Greenheck DG Fan be integrated with smart building systems?
Yes, the Greenheck DG Fan can be integrated with smart building systems. The Maxitrol SC25S is an analog signal converter that can change a 0-10 VDC or 4-20 mA control signal provided by an owner-supplied Building Management System into an output level capable of driving one or more modulating gas valves.
For more information, see page 18 of the manual. Read moreWas this helpful? Yes No
Need help?
Do you have a question about the DG and is the answer not in the manual?
Ask a question
Questions and answers
Related Manuals for Greenheck DG
Fan Greenheck DGX Installation, Operation And Maintenance Manual Make-up air unit (48 pages)
Heater Greenheck DGX Installation, Operation And Maintenance Manual Industrial space heating (32 pages)
Air Conditioner Greenheck DGX Installation, Operation And Maintenance Manual (20 pages)
Air Conditioner Greenheck Modular Make-Up Air Unit DGX Brochure & Specs Modular make-up air unit (9 pages)
Fan Greenheck DFD-M150 Specification Sheet Dynamic rated fire dampers (3 pages)
Fan Greenheck DF-18 Installation, Operation And Maintenance Manual Dock fan (6 pages)
Fan Greenheck 463622 Installation Instruction Supplement Grille installation (1 page)
Fan Greenheck CFSD-211 Installation, Operation And Maintenance Manual Fire & combination fire smoke dampers (with factory installed sleeve and actuator) vertical and horizontal mount; fsd series; dfd series; dfdtf series; cfsd series; sedfd series; sefsd series; imo series; ssfsd series (8 pages)
Fan Greenheck DC Installation, Operation And Maintenance Manual Overhead ceiling fans (28 pages)
Fan Greenheck DC Installation, Operation And Maintenance Manual High volume, low speed ceiling fans (25 pages)
Fan Greenheck DS-M Installation, Operation And Maintenance Manual High volume, low speed ceiling fans (24 pages)
Fan Greenheck DDF Manual Directional destratification fans (8 pages)
Fan Greenheck DS Installation, Operation And Maintenance Manual High volume, low speed ceiling fans (25 pages)
Fan Greenheck AMPLIFY DS Installation, Operation And Maintenance Manual Overhead ceiling fans (56 pages)
Fan Greenheck FumeJet FJC-300 Installation, Operation And Maintenance Manual Fume exhaust fans (20 pages)
Summary of Contents for Greenheck DG
Page 1 Document 470652 Model DG and DGX Direct Spark Ignition Make-Up Air ® Installation, Operation and Maintenance Manual Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure...
Page 2 If damaged, immediately contact your Greenheck Representative. The fan should be placed on a level surface to prevent Any physical damage to the unit after acceptance is not water from leaking into the unit.
Page 3: Table Of Contents
Table of Contents Installation of Indoor Unit 1. Install Hangers Installation Clearance to Combustibles/Service Clearances ..3 Install threaded hangers from ceiling supports. When Indoor Unit ....... . . 3 locating hangers, allow enough room to open access Unit Arrangement DB / HZ / UB .
Page 4: Unit Arrangement Db / Hz / Ub
Installation of Arrg. DB / HZ / UB 3. Apply Sealant Apply an appropriate sealant around the perimeter of 1. Install Curb and/or Equipment/Leg Support(s) the curb and duct adapter(s) to isolate fan vibration and Position curb and/or equipment/leg support(s) on the prevent water penetration.
Page 5: Roof Mounted Unit - Arrangement Dbc
Installation of Roof Mounted Unit NOTE Arrangement DBC The use of a duct adapter is recommended on a downblast (DBC) arrangement to align the ductwork 1. Install Curb/Equipment Support(s) with the supply unit. The duct adapter is only a guide Position curb/equipment support(s) on the roof and is not to be used as a support for the ductwork.
Page 6: Optional Evaporative Cooler Module
Installation of Evaporative Cooling 7. Install Supply Unit Use a crane and a set of spreader bars hooked to Module (optional) the factory lifting lugs to lift and center the unit on the extension/equipment support(s). NOTE Use self-tapping sheet metal screws to fasten the unit Small evaporative coolers ship attached to the base to the extension/equipment support(s).
Page 7: Electrical Wiring
Installation of Electrical Wiring 1. Determine the Size of the Main Power Lines The unit’s nameplate states the voltage and the unit’s MCA. The main power lines to the unit should be sized IMPORTANT accordingly. The nameplate is located on the outside of Before connecting power to the unit, read and the unit on the control panel side.
Page 8: Direct Gas Piping
Installation of Direct Gas Piping 1. Determine the Supply Gas Requirements The unit’s direct gas nameplate states the requirements for the gas being supplied to the unit. The direct gas IMPORTANT nameplate is located on the outside of the unit on the All gas piping must be installed in accordance control center side.
Page 9: Optional Evaporative Cooler Piping
Installation Evaporative Cooler 4. Pipe the Optional Vent Line If an optional vent line is located between the safety Piping (optional) shutoff valves, it must be piped to the outdoors. Evaporative Cooling with Recirculating Pump WARNING Supply Line Reference the National Fuel Gas Code for additional vent line requirements.
Page 10 Installation Evaporative Cooler 1. Install the Water Supply Line Supply line opening requirements vary by unit size Piping (optional) continued and arrangement and are field-supplied. Connect the water supply line to the float valve through the supply Evaporative Cooling with Auto Drain and Fill line opening in the evaporative cooling unit.
Page 11: Optional Water Wizard
1/2 inch 383086 8210G34 Line Open DGX-H32 (12.7 mm) the terminal strip in the unit’s control center. Drain (<9000 cfm) DG-H30 3/4 inch NOTE 383088 8210G9 Supply Closed (19.05 mm) DGX-H32 The Water Wizard™ start-up must be completed for (≥9000 cfm)
Page 12: Optional Direct Expansion (Dx) Coil Piping
Installation of Direct Expansion (DX) NOTE Coil Piping (optional) If a hot gas bypass kit was provided by others, refer to the manufacturer’s instructions. IMPORTANT 3. Install Suction Line Guidelines for the installation of direct expansion Install suction line(s) from the compressor to the suction cooling coils have been provided to ensure proper connection(s) which are stubbed through the side of the performance and longevity of the coils.
Page 13: Optional Chilled Water Coil Piping
Installation of Chilled Water Coil 7. Evacuate and Charge the Coil Use a vacuum pump to evacuate the coil and any Piping (optional) interconnecting piping that has been open to the atmosphere. Measure the vacuum in the piping using a IMPORTANT micron gauge located as far from the pump as possible.
Page 14: Optional Building Pressure Control
Installation of Building Pressure Installation of Dirty Filter Switch Control (optional) (optional) To adjust the switch, the unit must be running with 1. Mount Pressure Tap all of the access doors in place, except for the Using the factory provided bracket, mount the pressure compartment where the switch is located (exhaust tap to the outside of intake compartment).
Page 15: Blower
Start-Up - Blower 3. Check for Vibration Check for unusual noise, vibration or overheating of the Refer to the Start-Up Checklist in the Reference bearings. Reference the Troubleshooting section for section before proceeding further! corrective actions. Pre Start-Up Check IMPORTANT Rotate the fan wheel by hand and make sure no parts Excessive vibration may be experienced during are rubbing.
Page 16 Start-Up - Direct Gas IMPORTANT Proper air velocity over the burner is critical on direct IMPORTANT fired gas units. If the air velocity is not within the unit For proper unit function and safety, follow the start-up specifications, the unit will not operate efficiently, procedure in the exact order that it is presented.
Page 17 4. Set the Low Fire Time Delay IMPORTANT Set the low fire time delay to 75% of its maximum setting. Setting the maximum firing rate during mild weather See below for the location of the time delay setting. conditions may cause the high limit to trip out during NOTE extreme conditions requiring manual resetting.
Page 18 7. Set the Unit’s Operating Temperature Maxitrol SC25S - The SC25S is an analog signal converter that will change a 0-10 VDC or a 4-20 mA Set the operating temperature. The operating control signal provided by an owner-supplied Building temperature setting depends on which Maxitrol Management System into an output level capable of controller is used.
Start-Up - Evaporative Cooling 7. Set the Optional Auto Drain and Fill This system will automatically drain the sump tank and Recirculating (optional) fill it with fresh water at the field-adjustable intervals, typically once every 24 hours. This flushes mineral 1.
Page 20: Optional Water Wizard
Water Pressure Option setting. Size (inches) (in. wg) Use the Up and Down keys to adjust the Minimum DG-10 ⁄ Cooling Temperature as needed. Press the Enter key DG-20 to save the Minimum Cooling Temperature setting and DG-30 return to the Program Menu.
Page 21: Optional Water Wizard
NOTE CAUTION The Freeze Temperature is preset to the factory The sump drain line must be clear and draining to a recommended 45ºF. Steps 9-11 should only safe location before using Flow Test Mode. be completed if the Freeze Temperature needs CAUTION adjustment.
Page 22: Optional Vav Units
Check Operation - VAV Units Building Pressure Control BLOWER - a variable frequency drive is EXHAUST (optional) (OPTIONAL) SUPPL Y controlled according to input MAIN V AL VES HEA T from a pressure sensing device. NOTE Turn both knobs to the upper DIRTY FIL TERS Blower Start-Up, Steps 1-5 should be performed most pressure setting.
Page 23: Optional Recirculating Units
Check Operation - Recirculating Building Pressure Control - a BLOWER modulating spring return actuator EXHAUST Units (optional) (OPTIONAL) SUPPL Y is used to control the return air MAIN V AL VES HEA T amounts. The return air damper NOTE modulates from fully open to fully DIRTY FIL TERS Blower Start-Up, steps 1-5 should be performed closed based on a signal from a...
Page 24: Direct Gas
Operation - Electrical Electrical Sequence • Power passes to terminal TH on the Flame Safeguard (FSG) which begins it’s sequence 1. Exhaust Fan Contact (S1) Closed (optional) (see Direct Gas Burner Sequence) • Power passes to N.C. exhaust overload contact 4.
Page 25: Troubleshooting
Troubleshooting Blower Does Not Operate Proper supply power at main disconnect Check Main Voltage (See Blower Start-Up Step #1) Main Disconnect (DS1) Off (Turn Main Disconnect DS1 On) Primary Fuses Blown (Replace Fuses) 24 VAC between terminals R and X? Main Transformer (TR1) Defective (Replace Transformer) 24 VAC between...
Page 26: Motor Overamps
Troubleshooting Motor Overamps Air volume too high? Adjust drives or increase external static pressure as needed. (Reference Blower Start-Up – Step #5) Actual static pressure lower than design? Adjust drives to reduce blower RPM. (Reference Blower Start-Up – Step #5) Blower rotation correct? Reverse blower rotation.
Page 27: Insufficient / Too Much Airflow
Troubleshooting Insufficient Airflow Damper(s) not fully opened? Adjust damper linkage(s), or replace faulty actuator(s). (Damper actuators may take a few minutes to open) System static losses too high? Reduce losses by improving ductwork. Blower speed too low? Adjust drives as needed. (Reference Blower Start-Up –...
Page 28: Excessive Noise Or Vibration
Troubleshooting Excessive Noise or Vibration Belts worn or loose? Replace worn belts or tighten loose belts. (Reference V-Belt Drives in the Maintenance section) Sheaves aligned? Align sheaves. (Reference V-Belt Drives in the Maintenance section) Wheel(s) unbalanced? Clean and/or balance wheel(s). Bearings worn or need lubrication? Replace worn bearings or lubricate bearings as needed.
Page 29: Direct Gas Heater Does Not Operate
Troubleshooting Heater Does Not Operate Does not attempt to light (No visible spark) 24 VAC between terminals W1 and X? Heat Switch (S4) Off (Turn Heat Switch (S4) On) Heat Switch Not Wired (Wire Heat Switch (S4)) 115 VAC between terminals 102 and 101? Primary Fuses Blown (Replace Fuses)
Page 30 Troubleshooting Heater Does Not Operate Attempts to light, but no flame (Visible spark) Is the low fire set properly (Direct Gas Start-Up Step #6) Adjust the low fire setting (Reference Direct Gas Start-Up Step #6) Check inlet gas pressure. (Direct Gas Start-Up Step #1) Gas pressure between the minimum and maximum shown on the direct gas label?
Page 31: Optional Evaporative Cooling
Troubleshooting Evaporative Cooler does not Operate (Recirculating pump) Supply fan must be on for cooler to operate 24 VAC between terminals Cool switch (S4) off Y1 and X (Turn cool switch (S4) on) Cool switch not wired (Wire cool switch (S4)) 24 VAC between terminal A2 on Cooling Relay (RC) and X Optional inlet air sensor (TS4) holding...
Page 32: Optional Water Wizard
Troubleshooting Water Wizard™ — Improper Water Supply 4. Exit Program Mode After 15 seconds of idle time the controller will NOTE automatically exit Program Mode If the water supply is too low, the media will continuously appear dry. NOTE If the water supply is too high, the media will be saturated and excessive water will be draining from the sump tank.
Page 33: Routine
Maintenance - Routine Snow Accumulation CAUTION Clear snow away from roof mounted units. Keep the Lock-out the gas and the electrical power to the snow clear of the intake and access doors. unit before performing any maintenance or service Wheels operations to this unit.
Page 34 Motors Evaporative Coolers Motor maintenance is generally limited to cleaning and The media should be periodically brushed lightly with lubrication (where applicable). a soft bristle brush in an up and down motion while flushing with water. This aids in reducing the amount of Cleaning should be limited to exterior surfaces only.
Page 35: Fall
Maintenance - Fall Winterizing Chilled Water Coils Start-Up During the winter, chilled water coils need to be Repeat the Blower Start-Up Step #5 and Direct Gas protected against freezing. Manufacturer recommends Start-Up Steps #1, #2 and #3. This will ensure that the protecting the coils by either blowing-out the coils or by gas and air are set properly before the heating season flushing the coils.
Page 36: Gas Train Layout
Reference Typical Gas Train Layout with Direct Spark Ignition This is a typical gas train. The gas train in your unit may be different. Burner Differential Pressure Sensor (Airflow Switch) to Burner Modulating Combination Shut-Off Low Gas Pressure Valve Valve/Regulator Switch (optional) Burner Manual Shut-Off Valve...
Page 37: Control Center Layout
Reference Control Center Layout 1. Supply Motor Starter — 24 volt magnetic contacts 18. Flame Safeguard/Spark Generator — monitors for starting supply motor. flame, shuts down unit when unsafe conditions are detected. 2. Supply Overload — provides electronic overload protection to supply motor. 19.
Page 38: Start-Up Check List
Reference - Start-Up Checklist Start-Up Direct Gas Unit Model Number ________________________________ (e.g. DGX-120-H32) Refer to Direct Gas Start-Up section for further detail. o Check supply gas pressure Unit Serial Number _________________________________ (e.g. 10111000) _________ Maximum _________ Minimum Start-Up Date _____________________________________ _________ Actual Start-Up Personnel Name __________________________ o Set optional High Gas Pressure Switch...
Page 39: Maintenance Log
Maintenance Log Date ___________________Time _____________ AM/PM Date ___________________Time _____________ AM/PM Notes: ___________________________________________ Notes: ___________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ Date ___________________Time _____________ AM/PM Date ___________________Time _____________ AM/PM Notes: ___________________________________________ Notes: ___________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ Date ___________________Time _____________ AM/PM...
Page 40 Our Commitment As a result of our commitment to continuous improvement, Greenheck reserves the right to change specifications without notice. Specific Greenheck product warranties are located on greenheck.com within the product area tabs and in the Library under Warranties. Greenheck’s Direct Gas-Fired Make-Up Air, Models DGK, DG...
This manual is also suitable for:
Dgx
Table of Contents
Print
Print page 1 Print document (40 pages)
Rename the bookmark
Cancel
Delete bookmark?
Cancel Delete
Delete from my manuals?
Cancel Delete
Login
Sign InOR Sign in with Facebook Sign in with Google Don't have an account? Sign up! Restore password
Upload manual
Upload from diskUpload from URL Thank you for your help!
Fan Greenheck DGX Installation, Operation And Maintenance Manual Make-up air unit (48 pages) 
Heater Greenheck DGX Installation, Operation And Maintenance Manual Industrial space heating (32 pages) 
Burner Greenheck DGX Installation, Operation And Maintenance Manual 92% efficient burners (20 pages) 
Air Conditioner Greenheck DGX Installation, Operation And Maintenance Manual (20 pages) 
Air Conditioner Greenheck Modular Make-Up Air Unit DGX Brochure & Specs Modular make-up air unit (9 pages) 
Fan Greenheck CFSD-211 Installation, Operation And Maintenance Manual Fire & combination fire smoke dampers (with factory installed sleeve and actuator) vertical and horizontal mount; fsd series; dfd series; dfdtf series; cfsd series; sedfd series; sefsd series; imo series; ssfsd series (8 pages) 
Fan Greenheck DS-M Installation, Operation And Maintenance Manual High volume, low speed ceiling fans (24 pages) 
Fan Greenheck DDF Manual Directional destratification fans (8 pages) 
Fan Greenheck DS Installation, Operation And Maintenance Manual High volume, low speed ceiling fans (25 pages) 
Fan Greenheck AMPLIFY DS Installation, Operation And Maintenance Manual Overhead ceiling fans (56 pages) 
Fan Greenheck FumeJet FJC-300 Installation, Operation And Maintenance Manual Fume exhaust fans (20 pages)