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®
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!
Model RV/RVE
General Safety Information
Only qualified personnel should install and maintain this
system. 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. All moving parts must be free to rotate without
striking or rubbing any stationary objects.
3. Unit must be securely and adequately grounded.
4. Do not spin wheel faster than maximum cataloged
fan RPM. Adjustments to fan speed significantly
affect 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. Verify that the power source is compatible with the
equipment.
6. Never open access doors to the unit while it is
running.
®
Packaged Rooftop Ventilator
WARNING
The roof lining contains high voltage wiring. To
prevent electrocution, do not puncture the interior or
exterior panels of the roof.
DANGER
• Always disconnect power before working on or near
this equipment. Lock and tag the disconnect switch
or breaker to prevent accidental power up.
• If this unit is equipped with optional gas accessories,
turn off gas supply whenever power is disconnected.
CAUTION
This unit is equipped with a compressed refrigerant
system. If a leak in the system should occur,
immediately evacuate the area. An EPA Certified
Technician must be engaged to make repairs or
corrections. Refrigerant leaks may also cause bodily
harm.
CAUTION
When servicing the unit, the internal components may
be hot enough to cause pain or injury. Allow time for
cooling before servicing.
Document 474612
RV/RVE
Packaged Rooftop Ventilator
1
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Table of Contents
Related Manuals for Greenheck RV
Summary of Contents for Greenheck RV
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Page 1: General Safety Information
Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Model RV/RVE General Safety Information Only qualified personnel should install and maintain this WARNING system. -
Page 2: Receiving, Handling, Storage
If Model Cooling Capacity moisture or dirt accumulations are found on the parts, RV-35/RVE-35 5 to 15 tons the source should be located and eliminated. At each inspection, rotate all moving parts by hand ten to... -
Page 3: Table Of Contents
Table of Contents General Safety Information ....1 Factory-Installed Refrigeration System Components ......13 Receiving, Handling, Storage . -
Page 4: Subassemblies Blower
Subassemblies Blower Filters Either one or two plenum-type fans. All units are Two-inch thick metal mesh filters in the outdoor equipped with a plenum fan for Supply Air and a second weatherhood air intake, 2-inch thick pleated paper may be selected for Exhaust (Relief) Air. MERV 8 (standard) or MERV 13 filters in the airstream. -
Page 5: Installation
7 20x25x2 6 All dimensions are shown in inches. Weight shown in pounds. *Size and quantity is per airstream. Note: If RV unit is ordered with optional exhaust (relief) fan, corresponding RVE dimensions will apply, excluding pre-wheel outdoor/exhaust filters. Service Clearances... -
Page 6: Additional Clearances For Packaged Dx
Lifting Additional Clearances for Packaged DX Units 1. Before lifting, be sure that all shipping materials have been removed from unit. Packaged DX units require additional clearance because they must have unrestricted air movement 2. To assist in determining rigging requirements, around the condenser coil and condenser fans. -
Page 7: Roof Curb Mounting
Roof Curb Mounting Optional Piping Vestibule If the unit was ordered with the vestibule, the NA (Non- Roof curb details, including duct locations and dimensions, are to be found in the roof curb assembly Access side) clearance dimension must be measured from the vestibule. -
Page 8: Rail Mounting And Layout
Rail Mounting and Layout Each installation is unique and as a result, alternate entry locations may be field-located. Before using any • The units may be installed on rails provided and alternate entry location, verify the suitability of the installed by others. Ensure that rails are designed to location and ensure the use of an alternate location handle the weight of the unit and provide proper load does not interfere with unit wiring, components or... -
Page 9: Piping Installation Optional Coil Piping
Piping Installation Direct Expansion (DX) Coils (Split DX) 1. Piping should be in accordance with accepted Optional Coil Piping industry standards. Pipework should be supported independently of the coils. Undue stress should not Factory-installed cooling and heating components are be applied at the connection to coil headers. mounted in the coil section of the unit. -
Page 10: Electrical Information
Electrical Information Determine the Size of Electric Heater WARNING Wiring The roof lining contains high voltage wiring. To prevent An optional electric heater may require a separate electrocution, do not puncture the interior or exterior power supply. The power connection should be made panels of the roof. -
Page 11: Control Center Components Main Control Center
Control Center Components Optional Indirect Gas-Fired Furnace Main Control Center Components This is a typical installation. Components and their locations will vary. High Voltage Side 1. Power Distribution Block (high voltage supply is terminated here). 2. Fuse Holders 3. Phase Monitor 4. -
Page 12: Component Operation Phase Monitor
Component Operation Phase Monitor Supply Fan VFD Sequence The unit control circuitry includes a phase monitor that Optional Room CO2 Sensor: The microprocessor constantly checks for phase controller will modulate the supply fan based on a reversal, phase imbalance, loss comparison of the CO2 setpoint to the actual CO2 of phase or a power brownout. -
Page 13: Factory-Installed Refrigeration System Components
Factory-Installed Refrigeration System Components Circuit A Check Valve 1. Thermostatic Expansion Valve (TXV) 10. Hot Gas Bypass Valve (optional) Each unit is equipped with a Thermal Expansion On units equipped with hot gas bypass, hot gas Valve on each refrigerant circuit. The valve controls from the compressor is injected into the liquid line the flow of liquid refrigerant entering the evaporator of the evaporator coil after the TXV. -
Page 14: Start-Up Unit
Start-Up Unit DANGER WARNING Electric shock hazard. Can cause injury or death. Prior to starting up the unit, power must be energized Before attempting to perform any service or for 24 hours without a call for cool to allow the maintenance, turn the electrical power to unit to OFF compressor crankcase heaters time to boil off any at disconnect switch(es). -
Page 15: Pre-Start-Up Checklist
Pre-Start-Up Checklist Disconnect and lock-out all power switches. SPECIAL TOOLS REQUIRED Remove any foreign objects that are located in the • Voltage Meter (with wire probes) unit. • Amperage Meter Check all fasteners, set-screws, and locking collars • Pressure Gauges – (refrigerant) on the fans, bearings, drives, motor bases and •... -
Page 16: Start-Up Checklist
Start-Up Checklist Line Voltage. Check at unit disconnect. L1-L2 Volts L2-L3 Volts L1-L3 Volts Motor Amp Draw Supply Motor Amps Amps Amps Amps Exhaust Motor Amps Amps Amps Amps Fan RPM Correct fan rotation direction? Supply Fan RPM Supply Fan Yes / No Exhaust Fan RPM Exhaust Fan... -
Page 17: Start-Up Components Fan
Tolerance Unit Size (inches) (inches) Discharge Air Temperature Sensor Supply 5/32 ± 1/32 RV/RVE-35 Units are supplied with a Discharge Air Temperature Exhaust 5/32 ± 1/32 Sensor that is to be field-installed prior to unit start- Supply ± 1/16 up. The sensor is to be installed at least three duct... -
Page 18: Optional Energy Wheel Start-Up
Optional Energy Wheel Sequence of Operation Start-Up Optional Economizer - The economizer will be locked If selected, the energy wheel is installed in the unit’s out when: the outside air is <40°F (- 2°F hysteresis, airstream with one half of the wheel in the intake adjustable);... -
Page 19: Maintenance
Optional Energy Wheel Maintenance Cleaning WARNING Maintenance or cleaning of the wheel segments Whenever performing maintenance or inspections, should be done with the segments removed from always disconnect the power source. the wheel cassette to avoid splashing liquids or cleaning agents inside the cabinet. If the energy wheel Inspection appears excessively dirty, it should be cleaned to The wheel should be inspected semiannually in... -
Page 20: Energy Recovery Wheel - Troubleshooting
– Optional Energy Wheel Troubleshooting Symptom Possible Cause Corrective Action Refer to Adjust the Air Seals in the Optional Energy Wheel Air seals are too tight. Energy wheel Start-Up section. does NOT Broken belt. Replace. turn No power to wheel motor. Make sure wheel drive is plugged in. -
Page 21: Unit
Troubleshooting – Unit Symptom Possible Cause Corrective Action Blown fuse or open circuit breaker. Replace fuse or reset circuit breaker and check amps. Defective motor or capacitor. Replace. Blower fails Motor overloaded. Reset VFD and check amps. to operate Check for On/Off switches. Check for correct supply Electrical. -
Page 22: Refrigeration Circuit
Troubleshooting – Refrigeration Circuit TROUBLESHOOTING NOTE IMPORTANT Do not release refrigerant to the atmosphere! If Before any components are changed on the required service procedures include the adding or refrigeration system, the cause of the failure must be removing of refrigerant, the service technician must identified. - Page 23 Troubleshooting – Refrigeration Circuit Symptom Possible Cause Corrective Action Refrigerant overcharge. Check pressures, charge by subcooling. Compressor Condenser fan motor defective. Check fan motor. starts but Condenser coil inlet obstructed or dirty. Check coil and clearances. Clean coil if necessary. cuts out on high Check high side equalized pressures, check thermal...
- Page 24 Troubleshooting – Refrigeration Circuit Symptom Possible Cause Corrective Action Check for high entering wet bulb temperature, check for Excessive load on evaporator coil. excessive air flow. Compressor is unloaded. Check digital scroll controller signal and solenoid valve. (digital scroll) Check the thermal expansion valve, ensure bulb is insulated.
- Page 25 Troubleshooting – Refrigeration Circuit Symptom Possible Cause Corrective Action Check subcooling, check for leak. Repair leak and add Insufficient refrigerant charge. refrigerant. Defective or improperly adjusted Check superheating and adjust thermal expansion valve. expansion valve. discharge pressure Low suction pressure. See “low suction pressure”.
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Page 26: Routine Maintenance
Routine Maintenance Maintenance Frequency: Monthly DANGER 1. External Filter Clean metal mesh filters Electric shock hazard. Can cause injury or death. Before attempting to perform any service or 2. Internal Filters maintenance, turn the electrical power to the unit to Replace MERV 8 filters monthly. -
Page 27: Gas Furnace
Maintenance Procedures: WARNING Lubrication - Check all moving components for REFER TO GENERAL SAFETY INFORMATION proper lubrication. Apply lubricant where required. Do not operate this unit without the filters and Any components showing excessive wear should be birdscreen installed. They prevent the entry of foreign replaced to maintain the integrity of the unit and ensure objects such as leaves, birds, etc. -
Page 28: Maintenance Log
_________________________________________________ _________________________________________________ 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.