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NOTICE: Indicates information considered important but may have potential hazard for personal injury or property damage. Data Aire, Inc. reserves the right to make design changes for the purpose of product improvement or to withdraw any design without notice.
TABLE OF CONTENTS 1.0 INTRODUCTION ............................7 Product Information ..........................7 Model Identification ..........................7 Inspection ............................... 8 Paperwork .............................. 8 Storage ..............................8 Suggested Reference Storage Room Conditions .................. 9 General Storage Considerations ......................9 Registered Trademarks – Copy Rights – References Section ............. 10 2.0 INSTALLATION ............................
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Electrical Installation ..........................34 Commissioning Information ........................35 3.0 ELECTRICAL CONNECTIONS ........................36 General Electrical Field Wiring Guidelines ................... 37 Electrical Service ..........................38 Nameplate Ratings ..........................38 Grounding ............................. 38 Voltage Tolerance ..........................38 Three Phase Voltage Tolerance ....................38 Single-Phase Voltage Tolerance ....................
The Data Aire CRAC unit provides cooling, reheat, humidification, dehumidification and air filtration. The unit is provided with a Data Aire dap4™ microprocessor controller for precision control. The unit must be operated in a conditioned space within the operating envelope ASHRAE recommends for data centers.
Inspection This Data Aire CRAC unit has been factory run-tested and has gone through a comprehensive inspection prior to its packaging and shipment to ensure that it arrives in excellent condition. However, ship- ping damage can occur and a visual inspection of the outer crating immediately upon delivery should be performed.
A copy of the log sheet should be sent to Data Aire. Failure to perform the long-term storage requirements may void the warranty. Suggested Reference Storage Room Conditions • Dry bulb temperature range: 65°F to 85°F.
Registered Trademarks – Copy Rights – References Section NOTICE: Data Aire Inc. Trademarks Disclaimer: All names, logos, brand, materials and other Registered Trademarks, Trademarks, or Copy Rights seen featured or referred to within documents or our website are explicitly the sole property of their respective and rightful trademark holders or owners.
INSTALLATION NOTICE: There is no intent on the part of Data Aire, Inc. to define local codes or statutes which may supersede common trade practices. The manufacturer assumes no responsibility for their interpretation. Consult local building codes and National Electrical Code (NEC) for special installation requirements.
If possible, transport the Data Aire unit with a forklift or pallet jacks. If using a forklift or pallet jack, make sure that the forks (if adjustable) are spread to the widest allowable distance that will fit under the skid.
unit. • Allow enough space around the unit for removing the access panels and various parts of the unit. A minimum clearance equal to the width of the unit is suggested on one side of the unit for removing the coil or fan assembly. Add dimension of pipe chase, ducts, control and electrical panels, etc.
Equipment Handling and Rigging WARNING: Only properly trained personnel wearing appropriate safety head- gear, gloves, shoes and glasses should attempt to move the unit, lift it, remove packaging or prepare the unit for installation. Door and Rear Panel Removal Removal of the decorative doors is easily accomplished and may be done when moving equipment.
Figure 2 Upper Hole for Spring-Loaded Hinge Figure 3 Lower Fixed Pin Hinge Rear Panel Remove screws from rear panel to remove rear panel. Moving Unit into Final Location Move the unit in its upright position to the installation site using a forklift or pallet jack. It is recommended that the unit be protected from damage to the decorative doors during any storage or moving.
If necessary, to lift higher than the suggested 4 inches (100mm), exercise great care to ensure proper handling of the unit. Personnel not involved with the lifting of the unit should keep a safe distance from the unit. The unit may be too tall to fit through a doorway while on the skid. Measure the unit and doorway heights and refer to the installation plans to verify clearances prior to moving the unit.
tubular steel corner posts at the bottom of the unit. WARNING: Improper lifting or moving of the equipment may result in damage to the decorative doors, panels or frame members. Locating the Unit Verify that the floor is level, solid and appropriate construction to support the unit. When installing the unit, enough space must be allowed for airflow clearance, wiring, plumbing and service access.
Figure 5 Typical Return & Discharge Air Distribution There may be additional support required in the form of adjustable jackstands. These are adjustable, threaded leveling rods which support the unit in each of the corners and in the center on longer length units. Tighten the locknuts provided with each jackstand. The base plate can rest on the floor or on vibration pads.
Alternately, an air distribution plenum must be field fabricated with supply grilles to distribute the air. If a common plenum is utilized to connect the supply air for distribution from multiple units, it is recommended that isolation backdraft dampers be installed on the discharge end of the unit or somewhere prior to the common plenum to prevent cold discharge air from entering units that may be on standby.
The ultimate responsibility for line size selection is that of the installing contractor or design engineer. Data Aire does not assume this responsibility. The chart covers distances up to 200 equivalent feet (61 m). For installations beyond this distance, consult ASHRAE or similar references.
For air-cooled units built after 3/14/2017, the discharge check valves are already installed inside the evaporator section and do not need to be installed external to the unit. For units built before this date, the check valves must be field supplied and installed externally to the evaporator section.
Data Aire recommends a silver/phosphorus/copper alloy with 5 to 15% silver be used to braze the refrigerant line sets to the indoor and outdoor units. Nitrogen needs to be flowing through the lines to eliminate carbon deposit build-up on the inside of the joints. Carbon could contaminate the refrigerant and restrict the metering device.
Recommended Line Sizing, Air Cooled Units Hot Gas Lines Hot Gas Lines (Dual Circuit Systems) 50 Equivalent Feet (15.2) Meters Unit kW Horizontal & Vertical Down Vertical Up 5/8” (16 mm) O.D. 5/8” (16 mm) O.D. 21(6) 7/8” (22 mm) O.D. 5/8”...
NOTICE: 1. If equivalent piping length falls between two columns above, choose the longer equivalent length. 2. Dual circuit units should use the same line size on both circuits. 3. If hot gas line refrigerant flow is upward, use “Vertical Up”. If hot gas line refrigerant flow is downward, use “Horizontal &...
Field Piping, Remote Condenser Above Evaporator Figure 7 Typical Remote Condenser Above Evaporator Installation NOTES: Unless otherwise specified by job specific documentation 1. This is recommended piping. All piping to be per local and/or state codes. 2. Condenser to be no more than 60 feet (18.3 m) above evaporator. 3.
Field Piping, Remote Condenser Below Evaporator Figure 8 Typical Remote Condenser Below Evaporator NOTES: Unless otherwise specified by job specific documentation 1. This is recommended piping. All piping to be per local and/or state codes. 2. Condenser to be no more than 15 feet (4.6 m) below evaporator. 3.
Refrigerant Piping Protection The refrigerant in the system(s) is under high-pressure and this pressure can rapidly increase if the refrigerant is unintentionally confined (or trapped) between isolation devices such as service valves, liquid line solenoid valves, expansion valves, etc. If the ambient temperature surrounding the piping system increases, this may cause the contained refrigerant pressure to increase to an unacceptable level.
Water/glycol cooled units are shipped with plate/fin heat exchangers as standard equipment. A strainer (Data Aire provided) is shipped loose and is to be field installed in the supply line with shut-off valves (field provided) before and after the strainer. The strainers and water/glycol piping must be cleaned on a periodic basis.
NOTE: Unless otherwise specified by job specific documentation 1. The expansion tank is a required component of a proper system installation. The tank can be provided by Data Aire or by others. 2. All Water/Glycol field piping must be designed and installed in accordance with ASHRAE standards and local codes.
Connection Sizes, Water/Glycol Cooled Units Model Number Water In Connection Water Out Connection 1-5/8” (41 mm) O.D. 1-5/8” (41 mm) O.D. GFW or G* 021 1-5/8” (41 mm) O.D. 1-5/8” (41 mm) O.D. GFW or G* 028 1-5/8” (41 mm) O.D. 1-5/8”...
Condensate pumps shipped loose (or field provided) typically require a dedicated 110-volt power source. Field pipe connections must be made to the pump discharge connection. A check valve must be installed to prevent short cycling. See condensate pump electrical requirements in 3.12 Condensate Pumps (Optional).
The humidifier has a drain at the bottom which is factory piped to the main condensate drain line. The dispersion tube also has a drain line. No additional field piping is required. NOTE: Do not supply steam generating humidifier with softened water. Also, do not use hot water source.
In general with respect to Data Aire products, the commissioning process is the integration of Data Aire units with your project design system. Data Aire can help provide the installation and maintenance support, but the commissioning is normally done as specified by the owner or others unless otherwise specified.
WARNING: Data Aire equipment must be connected by a licensed and qualified electrician. Risk of electrical shock could result in injury or death. Disconnect all remote electrical facility power prior to working on the unit.
Remove all packing and shipping materials from the unit before installation. WARNING: The Data Aire dap4 controller does not isolate power from the unit, even in the Unit OFF mode. Some internal components require and receive power even during the Unit OFF mode of dap controller.
Refrigeration (HACR) type circuit breaker. Other protection devices are not allowed based upon the product UL listing. The facility main distribution panel which provides electrical service to the Data Aire equipment must be provided with a manual fused disconnect switch or HACR type circuit breaker per local and national electrical codes.
All control wiring on Data Aire equipment is 24 VAC or less. Refer to the wiring diagrams. Check all wiring connections in the unit control panel to ensure they are tight. Screw terminals...
installing contractor. Examples: Figure 10 Typical Remote Heat Exchanger Interconnection Points Figure 11 Typical Indoor Evaporator Interconnection Points Remote Shutdown Every gForce Ultra unit has remote shutdown contacts. These are intended for a field supplied dry con- tact or switch to be wired across two terminals. When the contactor or switch opens, the control circuit power is interrupted and the unit shuts down, including the control panel.
Remote Alarm 4 (Normally Open) dap4 Controller The Data Aire Computer Room Air Conditioner (CRAC) or Computer Room Air Handler (CRAH) is furnished with a microprocessor-based dap4 controller. The controller includes unit control functions and display normal functions and service diagnostics with six keys (buttons) for easy programming.
Condensate Pumps (Optional) If a gravity drain is not available, a condensate pump is an optional item. Condensate pumps may be unit mounted or ship loose for field assembly and wiring. Factory mounted pumps are pre-wired. While no outside power source is required, field piping is still a requirement. If the condensate pumps are shipped loose, a separate source of power is normally required.
Water Sensing Cable (Optional) Some units may be equipped with an optional water detection cable in addition to or in lieu of the condensate probe. The cable can sense moisture anywhere along its length. It is typically placed below the unit in a rectangular pattern that matches the perimeter of the unit. The cable is connected to the terminal board and ready for installation.
Wiring Diagrams Every Data Aire evaporator, condenser, condensing unit or fluid cooler comes with a wiring diagram. These diagrams are ladder type schematics intended for service personnel. The intent is to allow the technician to understand the wiring details associated with the electrical components and how they interface with the controls as well as peripheral equipment (including secondary heat exchangers).
make this electrical connection, this connector can only properly mate in one position as shown in the picture below. Figure 13 EEV with Electrical Mating Connector WARNING: DO NOT try to mate this connector in any other direction or attempt to use excessive force to make the electrical connection INSTALLATION OF REMOTE OUTDOOR HEAT EXCHANGER Air cooled condenser and fluid coolers have individual Installation, Operation and Maintenance Manuals which should be referred to for more complete details regarding remote heat...
(Ref: DOT 4BA400 or ABW400) Triple Evacuation and Dehydration Procedure Data Aire highly recommends a triple evacuation to be carried out on all Data Aire units to ensure the highest quality moisture removal. Moisture prevents the proper operation of both the compressor and the refrigeration system.
core removal tool) between the system and vacuum pump should be provided to allow the system pressure to be checked after evacuation. NOTICE: Do not turn OFF vacuum pump when connected to an evacuated system before closing shut-off valve. WARNING: Do not apply power to the compressor when in a vacuum Tools Needed •...
4. Connect a vacuum hose from the nitrogen bottle regulator to the manifold gauges vacuum port and carefully break the vacuum with clean dry nitrogen. Slowly raise the pressure to approximately 5 PSIG (35 kPa) without contaminating the system. 5. Isolate and hold the nitrogen charge for at least 20 minutes. 6.
Final Evacuation Stage 1. Move the vacuum hoses back to the vacuum pump and restart the pump. 2. Open the Schrader core shutoff valve and evacuate the refrigerant system from both sides of the system to 500 micron or less. 3.
(621 kPa) of liquid refrigerant. A liquid charging adapter prevents liquid refrigerant from entering the compressor. • In some cases, the assistance of a refrigerant recovery machine may be necessary to add the initial charge. • Care must be taken to prevent from over charging the system and from liquid entering the compressor and diluting the oil.
details. As soon as the compressors comes on, observe the compressor pressure difference for a few seconds and then turn the Cool 1 OFF. An out of phase fixed speed scroll compressor will draw relatively low amps and both suction and discharge pressures will remain nearly equal.
Air Cooled System Charging Air cooled condensers provided with Data Aire equipment have integral fan speed controls. The fan speed control is programmed at the factory to start the fan at a specific head pressure and increase speed (i.e., airflow) when enough head pressure is developed, the fan will run at...
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R407C) required by the order. Please see the Air-Cooled Condenser User Manual for more detailed information on fan speed control. Pre-Charge Fixed Speed Compressor 1. After the system has been properly evacuated. Calculate the proper charge for each circuit by following the steps and the data in the tables below. 2.
3. Add refrigerant weights based on the model and refrigerant type from the above Table 2 5.5 Line then add the required refrigerant weight from the gForce GF Dual Circuit Units Set Charge Calculations together and multiply by 80% (0.80) to get the initial starting charge.
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If the unit is a dual circuit system, temporarily disable the circuit 2 compressor by removing the fuses to prevent this compressor from starting during charging of circuit 1 compressor. If the unit is equipped with an optional disconnect switch, turn the disconnect switch to the ON position to allow facility electrical power to the unit.
Table 3 Refrigerant Charge Values Function R-410A Conditions R-407C Conditions Discharge Pressure 322 PSIG (2220 kPa) 199 PSIG (1372 kPa) minimum minimum Liquid Line Pressure 290 to 390 PSIG 245 to 285 PSIG (2000 to 2688 kPa) (1689 to 1965 kPa) Liquid Line 85 to 100°F 106 to 115°F...
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NOTICE: Prior to refrigerant charging, the proper tools and/or equipment must be available, and the system vacuum and moisture removal procedure must have been carried out. Refer to Section 5.1 Charging/Installation Work Procedures 5.2 Triple Evacuation and Dehydration Procedure prior to charging the system.
Receiver Installation Be sure the receiver capacity is large enough to store the winter charge during summer operations and is generally designed so that receiver can hold at least the same volume as the condenser coil. The receiver package(s) is typically mounted outdoors, near the condenser. If the receiver package(s) are installed indoors, a check valve is required on the liquid line at the condenser outlet and a liquid line relief valve.
To charge, connect the pressure gauge manifold set to the high and low ports near the compressor. Connect the charging line to the refrigerant tank and set for liquid feed. Open the refrigerant tank valve and purge the line. Use a “liquid charging adapter” to break the vacuum with 90 PSIG (621 kPa) of liquid refrigerant so liquid refrigerant doesn’t enter the compressor through the open compressor suction and discharge Rotolock service valves.
Table 5 Discharge Head Pressure Refrigerant Head Pressure R-410A 380 PSIG (2620 kPa) or higher R-407C 230 PSIG (1586 kPa) or higher While charging during the summer, meter refrigerant through the suction line until the level of liquid in the receiver sight glass is approximately 1/3 from the bottom (the level ball in the receiver will start to float) of the sight glass.
Table 7 Packaged Units with Receivers Acceptable parameters range for water/glycol packaged units with receivers, with return air temperature of 65°F to 85°F and entering water/glycol temp of 65 - 85°F Suction Liquid Line Liquid Line Suction Sat. Superheat Subcooling Refrigerant Pressure PSIG Temp °F (°C)
Important Refrigeration Components Expansion Valves Thermal Expansion Valve Each refrigerant circuit has an adjustable thermal expansion valve (TXV). These are factory adjusted to their normal rating. Any field adjustment should be to “fine tune” a system that has stabilized and already has acceptable operating parameters. Adjusting a TXV to produce large swings in superheat is not recommended.
Low Pressure Cutout Switch Each refrigerant circuit has a low-pressure cutout switch (non-adjustable) which features SPST open- low switch action and automatic reset. The switch is typically located in the evaporator near the compressor. The low-pressure switch rating is: Action R 410 R 407C Cut-out (Open)
23.1 (87.4) Brazed-Plate Condensers Data Aire water cooled units use brazed-plate condensers as a standard. Brazed-plate condensers are constructed of plates brazed together to form an assembly of separate channels. Refrigerant is confined to the space between the welded plates and is exposed to gaskets only at the ports.
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contaminants such as Legionella. Chapter 49 of the ASHRAE Handbook—HVAC Applications covers water treatment in more detail. Specific recommendations on water treatment can be obtained from water treatment suppliers. Scale treatment In daily use, scale accumulates at the water side of heat exchangers therefore regular scale treatment is a must.
ammonia so the pH must be maintained between 6 and 8. Hydrochloric acid should never be used to clean the exchangers. NOTICE: Risk of corrosion can cause equipment damage. Contact a water consultant about water quality, corrosion and freeze protection requirements. Water chemistry varies greatly by location, as do the required additives, called inhibitors that reduce the corrosive effect of the fluids on the piping systems and components.
Data Aire to offer meaningful technical support. This guide is not intended to be used as a means of altering the values which are set at the factory. Any changes made must be first discussed with a Data Aire trained technician.
To change or view Configurations, press the PRG key, and enter password “0066”. Configuration Menu WARNING: These menu screens are factory settings and are intended to be viewed only, not to be changed. If any values are different than shown here, please consult with Data Aire’s Service Department.
Regulation Menu How to Manually Open and Close an (EEV) This can be done in the Regulation Menu as shown below. Step 1: Follow previous screens to the Regulation Menu screen below.
Step 2: Change “Enable manual valve position” from 0 to 1 and “Manual valve position from 0stp to a desired step value. There are 480 steps total for the EEV. If you would like the valve to open 62.5%, enter “300stp” such as below: Step 3: Once all the changes are done, press ESC on the main screen and verify the valve opening position.
REGULAR MAINTENANCE ITEMS Air Filters The air filter section is an integral part of the environmental control system, designed within the unit for easy front accessibility. An initial set of filters are factory installed in the unit. The filters are 4-inch (100mm) deep, disposable, pleated design, extended-surface, nonwoven, reinforced cotton fabric;...
Humidifier The unit is provided with a self-contained, microprocessor-controlled steam generator type humidifier. The steam generating humidifier uses a disposable cylinder with electronic controls. The humidifier discharges pure steam with no material dust carry-over and has a self- regulating automatic flush cycle. Cylinders are disposable and do not requiring cleaning or maintenance.
EC motors have built in protective features that include the following: • Over-Temperature protection of the (motor) electronics, • Over-Temperature protection of the motor, • Locked rotor protection, • Phase failure protection, • Under voltage detection, • Short circuit protection. If any of the conditions exist, the motor stops electronically and an alarm (FAN FAILURE) will be indicated on the unit’s controller screen.
MAINTENANCE/INSPECTION CHECKLIST MAINTENANCE/INSPECTION CHECKLIST (NOTE: Maintenance/inspection items are monthly unless otherwise specified.) Evaporator Model No.: Evaporator Serial No.: Technician: Date: Temperature/Humidity set at: °F % RH Air Filters: Air Distribution Section ☐ Inspect and replace (if required) ☐ Check restriction of grilles and discharge louvers ☐...
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MAINTENANCE/INSPECTION CHECKLIST (NOTE: Maintenance/inspection items are monthly unless otherwise specified.) Reheat Refrigeration Piping ☐ Inspect element (and clean if required) ☐ Check for lines (leaks/lines secure) ☐ Check wiring ☐ Check capillary lines ☐ Record amps Condensate Pan and Pump (if equipped) ☐...
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MAINTENANCE/INSPECTION CHECKLIST (NOTE: Maintenance/inspection items are monthly unless otherwise specified.) Air Cooled Condenser, Condensing Unit, or Fluid Dry Cooler (if applicable) ☐ Inspect coil/clean if required Cooler (if applicable) ☐ Inspect coil/clean if required ☐ Inspect motor/motor mounts ☐ Inspect motor/motor mounts ☐...
Question 5: Will all units operate at 50 or 60 hertz power? Answer: No. This depends on the model and options selected. Consult with Data Aire for details. Question 6: Does the unit require an electrical ground? Answer: Yes. All units require a true earth ground.
Question 2: How much clearance around my Data Aire unit is required for servicing? Answer: Data Aire recommends a minimum of 36” on the front and two sides of floor-mounted units. Units with EC motor and plug fans require 40” on the front and two sides.
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The amount of steam generated depends on the model of humidifier you have in your Data Aire unit. To determine the model number, locate the product description label on the Nortec humidifier. Match the model number to the table below to determine the amount of steam generated.
11.0 CONTACT DATA AIRE Address: Data Aire, Inc. 230 West Blueridge Avenue Orange, CA 92865 Telephone: 714-921-6000 or 800-347-2473 E-mail: Service@dataaire.com Engineering@dataaire.com Sales@dataaire.com Fax: 714-921-6010 Main 714-921-6011 Engineering 714-921-6022 Parts Sales Web Site: www.dataaire.com Job/Unit Information: Data Aire Job Number:...