Desert Aire GreenAire Installation And Operation Manual

Climate control systems

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• Climate control

systems that provide

•

Water system for use

cooling, dehumidifi-

with chilled/hot water

cation, and optional

auxiliary heating for

• Climate control

•

CEA specific controls

Controlled Environ-

systems that provide

mental Agriculture in a

cooling, dehumidifi-

single, highly efficient

•

Unique control over

cation, and optional

package.

internal water flow

auxiliary heating for

and temperature

Controlled Environ-

• The GrowAire

mental Agriculture in a

Series climate control

•

Internal chilled water

single, highly efficient

system offers a

package.

recirculation pump

all-in-one packaged

rooftop configuration.

• The GrowAire

•

Internal chilled water

Series climate control

and hot water valves

• The GrowAire

system offers a

Series climate control

all-in-one packaged

system is available in

rooftop configuration.

a wide range of indoor

and outdoor configura-

• The GrowAire

tions and sizes to

Series climate control

match the application

system is available in

requirements.

a wide range of indoor

and outdoor configura-

• The GrowAire

tions and sizes to

Series climate control

match the application

system is a high-quality

requirements.

cost-effective system

designed for tight

• The GrowAire

spaces

Series climate control

system is a high-quality

cost-effective system

designed for tight

spaces

Indoor Air Quality

GreenAire

Aura™ (QS)

Indoor Air Quality

TotalAire™ (QS)

Climate Control Systems

Aura™ (QS)

VerticalAire™ (QV)

TotalAire™ (QS)

Installation and Operation Manual

VerticalAire™ (QV)

Installation and Operation Manual

GA Series™

GS Series™

GV Series™

Table of Contents

Summary of Contents for Desert Aire GreenAire

Page 1 Indoor Air Quality GreenAire Aura™ (QS) Indoor Air Quality TotalAire™ (QS) Climate Control Systems Aura™ (QS) VerticalAire™ (QV) TotalAire™ (QS) Installation and Operation Manual • Climate control systems that provide VerticalAire™ (QV) • Water system for use cooling, dehumidifi- with chilled/hot water...
Page 3 TERMS Desert Aire warrants all components (except as noted) for a period of two (2) years from the date of shipment. This warranty shall be limited to the supply of new or rebuilt parts for the part which has failed because of defects in workmanship or material, and does not include the cost for labor, transportation or other costs not herein provided for.
Page 4 N120 W18485 Freistadt Road • Germantown, WI 53022 USA PH: 1(262) 946-7400 • FAX: 1(262) 946-7401 • E-MAIL: service@desert-aire.com Additional copies of this manual can be purchased for a nominal fee from Desert Aire. Submit requests to the contact information listed above.
Page 5 Caution used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, could result in property damage. Product Warning for the State of California Desert Aire - GreenAire™ Manual...
Page 6: Table Of Contents
The Pump Does Not Run ....................Appendix ............................Recommended Duct Design ................... Recommended Controller Settings ................GreenAire™ Sequence of Operation ................5.3.1 Basic Sequence ...................... Component Replacement, Drain & Leak Instructions ............ System Rating Plate ...................... Start-Up Suppervision Supplemental Information ............
Page 7 System Start-Up Report ....................Start-Up Request Form ....................GR Series Start-Up Report ................... Desert Aire - GreenAire™ Manual...
Page 8 Desert Aire - GreenAire™ Manual...
Page 9: Introduction
Next, obtain a claim form from the carrier. Promptly fill out and return the form. Carriers may deny claims that you have not filled out within a week of delivery. Notify Desert Aire of any damage. Damaged units must have signed documents at the time of delivery to be eligible for a freight claim.
Page 10 GreenAire™ Products (GR) -Vertical Cabinet Models (GRAV,GRBV,GRCV,GRDV) Personnel should avoid stepping on the top of the unit. Desert Aire air handlers are not designed to support the weight of a person on all portions of the roof. Damage incurred through caved or distorted top panels will not be covered under warranty.
Page 11 It may be necessary to remove the wood pallet to get the unit through the doorway. Do not tip the unit on its side. Avoid dropping the unit down stairways or subjecting it to severe mechanical shock. Desert Aire - GreenAire™ Manual...
Page 12: Installation
Manual applies to standard unit configurations only. Location and Access Desert Aire GreenAire™ air handlers are configured to allow access from the rear and the sides. This means you can make your service connections and perform routine maintenance when you must install one side of the air handler close to a wall or other restriction. The “access side”...
Page 13: Duct Installation
You must install the outdoor air intake away from all sources of airborne contamination such as exhaust fans or plumbing vents. You can use galvanized sheet metal ducts for most applications. However, you should use aluminum or stainless steel ducts for extreme applications such as chemical-laden environments. Desert Aire - GreenAire™ Manual...
Page 14: Condensate Drain Piping
Figure 3 - Condensate Piping (Side-Mounted Drain Shown) Waterless Trap Option A waterless trap may have been included on your GreenAire™ order. This type of trap is highly recommended in the application. When units are installed outdoors in freezing conditions, the waterless trap reduces risk of freezing of the trap should there be prolonged periods of shut down.
Page 15 Figure 4 - Waterless trap ball valve The column of liquid within the GreenAire™ unit is adequate for moving the ball from the valve seat. No additional drop of the condensate line is required outside of the unit for external static pressures up to 2”...
Page 16: Unit Door Access And Lock
2.0” of water. If your return air static exceeds this specification, consult Desert Aire for help in resizing the P-trap. You may also need to install a cleanout tee or plug near the trap. Note that the drain opening in the drain pan is off-center to simplify its cleaning and servicing.
Page 17 There is a raised line that says “OPEN” which leads from the locked ridge to the unlocked ridge. Figure 8 - Latch, note positions of the ridges Desert Aire - GreenAire™ Manual...
Page 18: Water Piping Installation
Figure X. Note that the fluid will warm rapidly after starting, but it is critical that the loop be insulated to protect from significant condensation and freezing when the water is cold. Desert Aire - GreenAire™ Manual...
Page 19 Should the unit be installed above the primary pump, ensure that the Net Positive Suction Head available is greater than the requirements shown in the chart. It should be noted that these values are shown in absolute pressure rather than gauge pressure. Desert Aire - GreenAire™ Manual...
Page 20 Hot Water Flow and Pressure Hot water is provided to the GreenAire™ units to reheat or heat the air. The hot water system in the GreenAire™ unit includes a valve to vary the flow. There are two options. The unit can be configured with a two-way valve or a three-way valve.
Page 21: High Voltage Wiring
This box has been located on the exterior of the unit for your convenience and avoids having to make connections within the unit. Desert Aire - GreenAire™ Manual...
Page 22: Wire And Fuse Sizing
Intrinsically Safe circuit shall not overload the rating of the Intrinsically Safe barrier. The standard Desert Aire air handlers are controlled by a microprocessor controller. This controller is designed for precise monitoring and control of air temperature and relative humidity (RH) within a conditioned environment.
Page 23: Zone Sensor
See GreenAire™ Users Manual for recommended practices for regular calibration. If additional zone sensors are required, please consult the factory.
Page 24: Photo Sensor
Since the load changes rapidly on these transitions, the quicker response allows for better control in the room during this transition, limiting the amount of temperature fluctuation. Desert Aire - GreenAire™ Manual...
Page 25: Remote Display Terminal (Optional)
Remote Display Terminal (Optional) The remote display terminal (RDT) is the optional remote mounted interface with the unit controller. The GreenAire™ units are equipped with an internal display terminal (IDT), as part of the controller, and an optional wall-mountable RDT, in cases where the controller mounted display or IDT would prove hard to view or use.
Page 26: Co Sensors (Optional)
When optioned, a bulkhead fitting (Figure 18) is installed on the Desert Aire unit. In addition, Desert Aire provides the following for field installation: a pressure and gas flow regulator (Figure 18), hose for connection to the CO...
Page 27 To ensure safety, follow all directions indicated by the supplier of the CO and storage container manufacturer. As CO gas is “heavier” than air, it will accumulate or remain at the lowest levels in a higher concentration. Desert Aire - GreenAire™ Manual...
Page 28 Desert Aire - GreenAire™ Manual...
Page 29: Start-Up Procedure
The air handler unit operates in tandem with the chiller section that drives the water flow throughout the entire system. The pump within the GreenAire™ unit moves the water only within the unit and is intended to maintain the flow through the unit. Each GreenAire™ unit operates independently.
Page 30: Airflow Balancing
The airflow then is drawn through the EC fans and forced into the supply ductwork leaving the GreenAire™ unit. It is assumed that the incoming chilled water and warm water flow will be at a nearly constant temperature.
Page 31: Blower Adjustment Procedure
The GreenAire™ water-based system uses a remote chiller to provide the cooling for the air handler. Each GreenAire™ unit has a pump that provides the circulation for within the unit but the pumping power for the entire system comes from external pumps. The GreenAire™ pump operates at a continuous flow rate and inlet temperature.
Page 32: Dehumidification / Cooling Mode
Special care must be taken to ensure that the system is returned to service without contamination. Whenever servicing Desert Aire chiller connected equipment, observe the following: • Make certain to torque the bolts to the proper rating.
Page 33: General Testing
Check the temperature and humidity readings displayed on the controller. If you think the values are incorrect, check the sensor or its field-installed wiring for damage. Routine Maintenance Schedule 3.6.1 Service Every Month • Check the air filters and replace them if necessary. Desert Aire - GreenAire™ Manual...
Page 34: Service Every Six Months
Note: Please have the following information available if you need to call the Desert Aire Service Department: • Model Number • Serial Number • Room Temperature • Relative Humidity • Water Flow Rate • Inlet Water Temperature • Fan Motor Current • Pump Motor Current Desert Aire - GreenAire™ Manual...
Page 35: Troubleshooting
Troubleshooting Although Desert Aire air handlers have been designed for reliable and trouble-free operation, you may occasionally encounter a service-related problem. If you cannot immediately diagnose and fix the problem, do not be intimidated by the apparent complexity of the air handler. Your common sense and experience can help you solve the majority of these problems.
Page 36 Desert Aire - GreenAire™ Manual...
Page 37: Appendix
Undersized or restrictive ducts reduce the system airflow, which can cause premature compressor failure. Use the following diagrams as a guide when you design the duct system. Figure 19 - Recommended Duct Designs for Desert Aire Units Desert Aire - GreenAire™ Manual...
Page 38: Recommended Controller Settings
5.3.1 Basic Sequence The GreenAire™ unit is designed to be mated with a chilled water system either as a single unit or as part of a system with multiple GreenAire™ units, possibly of varying sizes. The units are linked together via an Ethernet network. There is a lead unit that commands all other units serving that room to provide similar supply air temperature and humidity.
Page 39 The airflow will modulate from the minimum CFM setting to the maximum CFM setting. The reheat coil will be inactive when there is a Temperature Demand for Cooling is the only call. Desert Aire - GreenAire™ Manual...
Page 40 The unit can be in dehumidification mode and allow for reheating of the air to maintain zone temperature setpoint. On a quick change of setpoint or a large change in space Desert Aire - GreenAire™ Manual...
Page 41: Component Replacement, Drain & Leak Instructions
• Solder a portion of the repair as an assembly and use press fittings to fit this assembly into the unit after the joints of the assembly have cooled. Desert Aire - GreenAire™ Manual...
Page 42: System Rating Plate
Fitting Size Minimum Distance 1/2" 1 1/2" 3/4" 2 3/4" 1" 3" 1 1/4" 3 3/4" 1 1/2" 4 1/2" 2" 6" 2 1/2" 7 1/2" 3" 9" 4" 12" o Repairs made by brazing are not recommended due to the high heat involved. If a braze joint is required, stay 12”...
Page 43: Start-Up Suppervision Supplemental Information
Figure 20 - System Rating Plate Start-Up Supervision Supplemental Information A Desert Aire factory start-up is an option which is normally purchased with the equipment. A factory start-up includes several key services: • The expertise of an accomplished, factory-trained mechanic who will supervise the commissioning of the equipment.
Page 44 A copy of the system “Start-Up Report” can be found on the following pages. This report needs to be filled out thoroughly by a qualified service technician and returned to Desert Aire for warranty validation. Please ensure that the model and serial number of the unit are noted on this form.
Page 45 Factory Assisted Start-Up is not an installation bid & therefore the system must be ready to run before scheduling. CST Start-Up is performed by a local Certified Service Technician who has been trained by Desert Aire. The CST performs all duties listed above.
Page 46 N120 W18485 Freistadt Road Germantown, WI 53022 (262) 946-7400 Fax: (262) 946-7401 www.desert-aire.com Start-up request form for GreenAire units Models GR Unit Information Model # Serial # Jobsite Information Job site name Job Site Address Contractor Information Installing Contractor: Manager’s Name :...
Page 47 • Before continuing, read the Installation and Operations manual. If you do not fully understand the manual contact the Desert Aire Service Department. Please be prepared with the model and serial numbers located on the rating plate of the unit.
Page 48 Unit Entering Air Temperature (°F) Unit Entering Air Humidity (%RH) Supply Air Temperature in Maximum Cooling (°F) Supply Air Temperature in Maximum Dehumidification and Heating (°F) Supply Air Temperature in Maximum Heating without Dehumidification (°F) Desert Aire - GreenAire™ Manual...
Page 49 Photocell and input respond properly to lighting CO2 Sensor connected and valve operates when commanded by controls Desert Aire zone sensor connected and operates upon failure of network Lag unit responds to lead unit commands Lead-Lag Setup per Addressing Form or Modified Form Submitted Unit visible on AireGuard system Unit Reviewed for leaks, gasket integrety, door operation, etc.
Page 50 Additional Comments: Desert Aire - GreenAire™ Manual...
Page 51 Additional Comments: Desert Aire - GreenAire™ Manual...
Page 52 PTIMIZING OLUTIONS HROUGH UPERIOR EHUMIDIFICATION ECHNOLOGY N120 W18485 Freistadt Road • Germantown, WI 53022 • E-mail: info@desert-aire.com Ph: (262) 946-7400 • Fax: (262) 946-7401 • Website: www.desert-aire.com 447 2023/02...