Table of Contents
Advertisement
Advertisement
Table of Contents
Related Manuals for Data Aire gForce DX series
Summary of Contents for Data Aire gForce DX series
- Page 2 Special care should be given to those areas where these symbols appear. Data Aire, Inc. reserves the right to make design changes for the purpose of product improvement or to withdraw any design without notice.
-
Page 3: Table Of Contents
Table of Contents INTRODUCTION .......................5 Product Information .....................5 Model Identification .....................5 Inspection ......................5 Paperwork ......................6 INSTALLATION ......................7 Installation Checklist....................7 Room Considerations ..................7 Equipment Handling ....................7 Rigging ........................8 Locating the Unit ....................8 2.5.1 Downflow Units .....................8 2.5.2 Upflow Units ....................9 Storage ........................9 Piping ........................10... - Page 4 INSTALLATION OF REMOTE OUTDOOR HEAT EXCHANGER ......25 CHARGING ......................25 Voltage Phase Check ..................25 5.1.1 Evaporator Power Phasing .................25 5.1.2 Remote Heat Exchanger Fan Motor Phasing ..........25 Evacuation......................26 Air Cooled Systems ...................26 5.3.1 Fan Speed Control System Charging ............26 5.3.2 Flooded System Charging ................28 Water/Glycol System ..................29...
-
Page 5: Introduction
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. -
Page 6: Paperwork
Please notify factory personnel of any claims. Paperwork Each Data Aire unit ships with a start-up sheet that should be completed during installation. Also included in the paperwork is a warranty/information packet that provides important wiring diagrams, specific component literature, warranty registration cards and other valuable paperwork, including a copy of this User Manual. -
Page 7: Installation
2 INSTALLATION NOTE: 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. -
Page 8: Rigging
Rigging Move the unit in its upright position to the installation site. It is recommended that the unit be protected from damage to the decorative doors during any storage or moving. Removal of the decorative doors is easily accomplished and may be done without moving the equipment. The shipping skid should be left in place if the unit is being moved with a forklift. -
Page 9: Upflow Units
Storage Your Data Aire equipment comes ready for immediate installation. In some instances it may be necessary to store the equipment for a period of time. If you must store the equipment it should be done in a dry area, out of the weather, protected from damage by other equipment in storage or transportation equipment, never stacked, and avoid frequent relocation. -
Page 10: Piping
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. -
Page 11: Liquid Lines
and restrict the metering device. Piping must be supported within 18” (457 mm) of the inlet and outlet connections. The inlet connection is located on the top header of all units. The discharge outlet is located at the bottom of the header. Discharge line pressure drop should not exceed 6 PSI (41 kPa) for R-407C and 9 PSI (62 kPa) for R-410A. -
Page 12: Recommended Line Sizing
2.7.5 Recommended Line Sizing Note1: If equivalent piping length falls between two columns above, choose the longer equivalent length. Note 2: Dual Circuit units should use the same line size on both circuits. Note 3: If hot gas line or suction line refrigerant flow is upward use, “VERTICAL UP”, if it is downward or horizontal, use “HORIZ. -
Page 13: Connection Sizes, Air Cooled Units
2.7.6 Connection Sizes, Air Cooled Units Liquid Line Suction Line Hot Gas Line Model Number (2 per unit) (2 per unit) (2 per unit) 1/2” (12 mm) O.D. 7/8” (22 mm) O.D. GFA* 021 1/2” (12 mm) O.D. 1/2” (12 mm) O.D. 7/8”... -
Page 14: Field Piping, Remote Condensing Unit
2.7.8 Field Piping, Remote Condenser/Condensing Unit Below Evaporator 2.7.9 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. -
Page 15: Water/Glycol Cooled Unit Piping
The installing contractor must review the piping system and guard against these possible areas where the refrigerant could be confined. If the areas cannot be vented and allow the refrigerant to expanded freely or eliminate pressure increases, the installing contractor must field supply pressure relief devices. Additionally, the installing contractor must consult local building and piping codes regarding installing pressure-safety devices in the required areas of the piping system(s) that could be unintentionally isolated during field installation, maintenance or repairs of the refrigerant systems. -
Page 16: Field Piping, Water/Glycol System
Note: One of the most common problems in a water/glycol system is the presence of air in the condenser water loop. Air vents must be installed in various locations the piping system to purge the air. Water/glycol system piping may include a centrifugal pump (or pumps for redundancy). Pumps must be primed before operating per the pump manufacturer’s guidelines. -
Page 17: Connection Sizes, Water/Glycol Cooled Units
2.7.12 Connection Sizes, Water/Glycol Cooled Units Model Number Water In Water Out 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” (41 mm) O.D. GFW or G* 035 1-5/8”... -
Page 18: Humidifier Piping
Do not expose drain line to freezing temperatures. Drain line may contain boiling water therefore use copper or other suitable material. Drain line must comply with local building codes. It is recommended to install under-floor leak detection equipment whenever possible. Note: Condensation formation and frequent humidifier flushing are normal functions of this equipment. -
Page 19: Electrical Connections
3 ELECTRICAL CONNECTIONS WARNING: The Data Aire cooling unit must be connected by a licensed and qualified electrician. Risk of electrical shock could result in injury or death. Disconnect all remote electrical power supplies prior to working on the unit. -
Page 20: Nameplate Ratings
Because of the wide variety of indoor evaporators and remote heat exchangers offer by Data Aire, the installing contractor must refer to the schematic which is provided inside the electrical control box of each unit, for the required auxiliary control wiring interconnection terminal points. -
Page 21: Remote Shutdown
Figure 2 - Typical Indoor Evaporator Interconnection Points Remote Shutdown Every gForce unit has remote shutdown contacts. These are intended for a field supplied dry contact 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. -
Page 22: Condensate Probe
WARNING: The condensate drain MUST be connected to an external drain line (provided by others) before unit start up. Without field piping condensate water will damage internal components. Condensate pumps which ship loose normally require a separate source of power. Always check the pump power requirements before connecting power. -
Page 23: Manual Override Switches
3.13 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 remote heat exchangers). -
Page 24: Eev Connection
3.12 Electrical Connection to EEV (Optional Feature) The Electronic Expansion Valve (EEV) uses an electrical cable assembly with a DIN type connector to interface with EEV valve stator. The connector is indexed by one large blade connection so that the connector can only be properly mate one way. When it is necessary to making this electrical connection, this connector can only properly mate in one position as shown in the picture below (See Figure 1): DIN Connector... -
Page 25: Installation Of Remote Outdoor Heat Exchanger
4 INSTALLATION OF REMOTE OUTDOOR HEAT EXCHANGER Air cooled condenser and fluid coolers have individual User Manuals which should be referred to for more complete details. 5 CHARGING General charging guidelines: • Check the CRAC unit nameplate for refrigerant type (R-410A or R0407C) to be used • Unit control configurations differ depending on refrigerant type • Refrigerant charging requires the unit to be operational • Calculate the amount of charge for the system... -
Page 26: Evacuation
Air Cooled Systems 5.3.1 Fan Speed Control 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 the sufficient head pressure is developed, the fan will run at full speed. - Page 27 Before starting a compressor, the crankcase heater should be energized WARNING: for a minimum of 12 hours to reduce the possibility of liquid slugging on start-up. Failure to energize the crankcase heater could result in compressor damage. If the system is charged from a vacuum, the pre-heating of the compressor is not necessary.
-
Page 28: Flooded System Charging
5.3.2 Flooded System Charging Flooded type systems are units having refrigerant circuits with an optional liquid receiver and head pressure control valve. When the ambient temperature falls during cold weather, the head pressure control valve will regulate the flow of refrigerant to ensure minimum receiver pressure. The condenser is partially flooded with liquid refrigerant in cold weather to maintain a minimum liquid line pressure. -
Page 29: Water/Glycol System
Refrigerant Discharge Head Pressure R-410A 350 PSIG (2.41 MPa) or higher R-407C 230 PSIG (1.59 MPa) or higher Remove any blocks that may have been used on the condenser coil. If the ambient temperature is below 70°F (21⁰C), some of the refrigerant will be backed up in the condenser coil causing the liquid level in the receiver to drop (this is normal). -
Page 30: Refrigerant Handling
Refrigerant Handling The use of recovery/recycling units is required by U.S. Environmental Protection Agency (EPA) regulations. Technicians who service and dispose of air conditioning and refrigeration equipment must recover the refrigerant instead of venting it to the atmosphere. Except for extremely small releases of refrigerant such as what occurs when disconnecting service hoses, a technician who knowingly releases or vents refrigerant to the atmosphere is in violation of this regulation. -
Page 31: Low Pressure Cutout Switch
Action R 410 R 407C 450 PSI Cut-out (Open) 575 PSI Manual Reset Manual Reset Cut-in (Close) 5.6.3 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. -
Page 32: Glycol Systems
Thus, it is recommended to use closed-loop cooling systems with good filtration or separators to keep the water clean. Note: Data Aire does not have experience of in-depth knowledge in the field of water treatment and therefore only provides the following information as a general reference. -
Page 33: Brazed-Plate Condensers
6.2.1.2 Scale treatment In daily use, scale accumulates at the water side of heat exchangers therefore regular scale treatment is a must. Variations in water quality from place to place and variations in applications of plate heat exchangers make it difficult to define in simple terms the water quality requirements for minimum maintenance. It is important to ensure the right water quality and reduce scale by establishing the requirements for local conditions or utilizing specialist water treatment companies. -
Page 34: Internal (Fluid) Volume - Fluid Coolers
Note: 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. The chemistry of the water used must be considered, because water from some sources may contain corrosive elements that reduce the effectiveness of the inhibited formulation. -
Page 35: Controls
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 technicians. -
Page 36: Configuration Menu
To change or view Configurations, press the PRG key, and enter password “0066”. 7.3.2 Configuration Menu These menu screens are factory settings and are intended to be viewed WARNING: only, not to be changed. If any values are different than shown here, please consult with Data Aire’s Service Department. -
Page 38: Regulation Menu
7.3.3 Regulation Menu... -
Page 39: How To Manually Open And Close An (Eev)
7.3.4 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. -
Page 40: Multiple Eev Configuration
Step 3: Once all of the changes are done, press ESC on the main screen and verify the valve opening position. Step 4: Do not forget to revert the control back to automatic by changing the “Enable manual valve position” back to 0 from 1. 7.3.5 Multiple EEV Configuration For single circuit units, there will be one EEV and it will be shown as valve A. -
Page 41: Regular Maintenance Items
8 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;... -
Page 42: Humidifier Canisters
Cylinders are disposable and do not requiring cleaning or maintenance. The humidifier fill level, water conductivity and flush rate automatically adapt, both in frequency and duration, to variations in the incoming water. The humidifier assembly is capacity field-adjustable and includes a high-water probe. Drain duration and drain interval are also field-adjustable. -
Page 43: Testing
If for any reason the rotor is blocked, the motor will electronically switch off. Before looking for blockage make certain to remove power from the unit. Once the blockage is cleared the motor will automatically restart when powered on. If there is an alarm condition indicated as “NO AIRFLOW”, all active functions (cooling, heating and humidification will stop until the alarm is cleared. -
Page 44: Contact Data Aire
714-921-6011 Engineering 714-921-6022 Parts Sales Web Site: www.dataaire.com Job/Unit Information: Data Aire Job Number: ___________________________________ Evaporator Serial Number: ________________________________ Evaporator Model Number: ________________________________ Condenser/Fluid Cooler Serial Number: ______________________ Condenser/Fluid Cooler Model Number: ______________________ Date installed: _______ / _____ / 20_____... -
Page 45: Maintenance/Inspection Checklist
MAINTENANCE/INSPECTION CHECKLIST NOTE: Maintenance/inspection items are monthly unless otherwise specified. MAINTENANCE/INSPECTION CHECKLIST Evaporator Model No.: Evaporator Serial No.: Remote Heat Exchanger Model No.: Remote Heat Exchanger Serial No.: Technician: Date: Temperature/Humidity set at: _______ °F _______ % RH Air Filters (Monthly) Air Distribution Section ___ Check for restricted airflow ___ Check restriction of grilles and... - Page 46 MAINTENANCE/INSPECTION CHECKLIST EC Plug Fan Section: ___ Check plug fan wheel movement to be free and clear of any debris Check motor voltage Record motor amp draw Fan#1 L1 ____ V L2 ____ V L3 ____ V L1 ____ A L2 ____ A L3 ____ A Fan#2 L1 ____ V...
- Page 47 MAINTENANCE/INSPECTION CHECKLIST Reheat (Quarterly) ___ Inspect element (and clean if required) ___ Check wire connections ___ Check high limit switch operation ___ Record amps #1 ____ A #2 ____ A #3 _____ A Humidifier (Steam Generator) is equipped ___ Inspect drain valve/trap/drain line for deposits ___ Check for leaks (make-up water/hoses) ___ Check humidifier canister for deposits and water level (replace if needed) ___ Check operation...
- Page 48 MAINTENANCE/INSPECTION CHECKLIST Glycol Pump (if applicable) (Monthly) ___ Glycol leaks (pump area) ___ Pump operation ___ Auto air vent clean of mineral deposits Glycol Pump (if applicable) (Quarterly) Record pump pressures: Suction _____ PSIG Discharge ______ PSIG Suction _____ PSIG Discharge ______ PSIG Record pump current draw: L1 _____ A L2 _____ A L3 _____ A L1 _____ A L2 _____ A L3 _____ A...
- Page 52 INDEX Air cooled system ........................24 Air discharge plenum ........................9 Air filter ............................39 Air vents.............................13 Auxiliary chilled water ........................15 Auxiliary control wiring .......................19 Centrifugal pump ........................13 Charging ............................23 Check valve .........................10, 16 Computer Room Air Conditioner....................5 Condensate probe ........................20 Condensate pump .......................16, 19 Condensing unit.........................27 Condensing units ........................13 Controls .............................34...