Data Cool Installation, Operation and Maintenance Manual 2 and 3 ton Air, Water and Glycol Cooled DX and Chilled Water
CONGRATULATIONS ON THE SELECTION OF A DATA AIRE PRECISION ENVIRONMENTAL CONTROL SYSTEM. PROPER INSTALLATION, OPERATION AND MAINTENANCE OF THIS EQUIPMENT WILL ENSURE YEARS OF OPTIMAL PERFORMANCE. This manual is intended to assist trained service personnel by providing necessary guidelines for this particular equipment. Installation and service to Data Aire units should be done by qualified individuals with an adequate background in areas such as HVAC, electrical, plumbing and electronics, as applicable.
Table of Contents MODEL IDENTIFICATION ........................................................................ 5 1.0 INSTALLATION .......................................................................................... 6 1.1 1.2 1.3 1.3.1 1.4 1.5 1.6 2.0 PIPING ........................................................................................................ 8 2.1 2.1.1 2.1.2 2.1.3 2.1.4 2.2 2.2.1 2.2.2 2.2.3 2.2.4 2.3 2.4 2.5 2.6 2.7 3.0 3.1 3.2 3.3 3.4 3.5 4.0 4.1 4.2 4.3 4.4 4.4.
Table of Contents, continued 5.0 CHARGING ..................................................................................................................... 15 5.1 Voltage Phase Check ............................................................................................................ 15 5.1.1 Evaporator ..................................................................................................................... 15 5.1.2 Secondary Heat Exchanger ...........................................
Model Identification 5
1.0 INSTALLATION There is no intent on the part of Data Aire, Inc. to define local codes or statutes which may supercede common trade practices. The manufacturer assumes no responsibility for their interpretation. Consult local building codes and the National Electrical Code for special installation requirements. 1.1 Room Considerations Precision air conditioning equipment is designed to control spaces within close tolerances of temperature and humidity.
Note to Installing Contractor: Condensation formation and frequent humidifier flushing (when humidifier is installed) are normal functions of this equipment. Drain connections must be made to ensure proper water removal. Unit will require drain connections for condensate removal and water connections possibly for humidifier (when installed) makeup water, chilled water and/or hot water. Installation of units above equipment that could sustain water damage should be avoided. 1.3.
2.0 PIPING 2.1 Split Air Cooled Unit Piping Refer to the attached Line Sizing chart on page 24 for a guideline for sizing refrigerant lines. The ultimate responsibility for line size selection is that of the installing contractor or project engineer. Data Aire does not assume this responsibility. The chart covers distances up to 200 equivalent feet. For installations beyond this distance, consult ASHRAE or similar references.
2.1.3 Connection Sizes, Air Cooled Units Model Liquid Suction DACU 02 1/2" 3/4" DACU 03 1/2" 3/4" DACU 04 1/2" 3/4" DACU 05 1/2" 3/4" Note: Unit will have a Liquid Line and Suction Line Field connections at the indoor evaporator and remote condensing unit will not necessarily be the same as the field pipe size required. In some cases these sizes will vary significantly. 2.1.
2.2 Water/Glycol Cooled Unit Piping The required field installed condenser water pipe sizes may or may not be the same as the connection sizes at the evaporator or fluid cooler. This will depend on the length of pipe and the calculated pressure drop of peripheral components. Remote water cooled condensing units may also be connected to building water or tower water sources. Pipe size will depend on length of run and the maximum water flow required.
2.2.3 Connection Sizes, Water/Glycol Cooled Units Evaporator Model DACW/G 02 DACW/G 03 Water IN and OUT Connections, OD 3/4” 3/4” 2.2.4 Connection Sizes, Fluid Coolers Fluid Cooler Model DAFC 06 DAFC 07 DAFC 09 DAFC 11 DAFC 15 DAFC 17 2.3 Water IN and OUT Connections, OD 1-5/8" 1-5/8" 1-5/8" 2-1/8" 2-1/8" 2-5/8" Chilled Water Piping Units with Chilled Water cooling require a separate source of chilled water.
2.5 Humidifier Piping The optional humidifier offered on Data Cool is a steam generator type with a disposable cylinder. The humidifier makeup water should be brought to the humidifier through the field connection opening using 1/4" copper tubing. A compression fitting is provided at the humidifier. A shutoff valve should be provided outside the air conditioner to allow disconnection for service. An in-line water pressure regulator and strainer should be installed.
3.0 ELECTRICAL CONNECTIONS Before proceeding with the electrical connections, make certain that the volts, hertz and phase correspond to that specified on the unit electrical nameplate. Units damaged from incorrect power input will not be covered under warranty. Use copper conductors only. 3.1 Electrical Service Check to be sure the service provided by the utility is sufficient to handle the additional load imposed by this equipment. Indoor unit has a single power source.
4.0 INSTALLATION OF REMOTE OUTDOOR HEAT EXCHANGER 4.1 Rigging This section covers outdoor condensing units and fluid coolers. Outdoor heat exchangers should be moved to their (typically rooftop) mounting location using a crane or fork lift. Each fan section has supports with lifting holes at the top. Do not lift with a choke sling around the unit. Spreader bars are recommended for lifting multiple fan units. Under no circumstances should the coil headers or piping be used for lifting the unit.
4.3 Electrical Service Refer to Sections 3.1 to 3.5 for information regarding line voltage and control voltage wiring details. 4.4 Air Cooled Condensing Unit - Model DRCU 4.4.1 Fan Speed Control Standard outdoor air cooled condensing units have a fan speed controller on the first fan. On single-fan condensing unit this is the only means of control. A variable speed controller modulates the motor speed based on system head pressure. The fan speed controller will normally not require field adjustment.
Start the evaporator fan and compressor. Check the liquid line sight glass to get a feel for the approximate charge. Bubbles in the sight glass are not unusual at this point and can be caused by flashing from liquid line pressure drop, low sub-cooling or low charge. It is likely that more refrigerant will be required to complete the charging procedure. Adjust the refrigerant charge until the sight glass clears or has only sparse bubbles.
5.3 Water/Glycol Cooled Split Systems 5.3.1. Water/Glycol Cooled Split Systems Charging All water/glycol Data Cool units are split systems requiring field charge. After the refrigerant piping and water line piping is properly completed, connect the refrigerant drum to the low side and charge with vapor. Charge with approximately three lbs. per nominal ton. For example, a model DACU 0334-AO is a nominal 3 ton unit. Charge with about 9 lbs. of refrigerant to begin.
5.4 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 to atmosphere.
6.2 Programmable Digital Thermostat A cooling only digital thermostat designed to provide accurate control, displays room temperature and cooling on mode. The buttons on the front of the thermostat allow complete control of the equipment. Cooling - Select the temperature by pressing the “Up” or “Down” button. The word “COOL” and the temperature setting is displayed for five seconds.
The wiring diagram in the evaporator will indicate field interface terminals to the secondary heat exchanger. The internal wiring of the heat exchanger is found on a separate diagram which can be found on the inside cover of the heat exchanger electrical box. Both diagram types are also placed inside the shipping/ warranty packet that is placed inside the evaporator. Evaporator wiring diagrams will have a drawing number which starts out with the three letter designation, “DCX”.
7.6 Refrigerant Filter Drier Factory installed refrigerant filter driers do not normally require maintenance. When replacing compressors or other repairs that open the refrigeration system to atmosphere, it is advisable to replace the filter drier. The equivalent type and size should be used.
8.0 Warranty Policy Data Aire Inc. warrants your Data Aire environmental control unit to be free from defects in material and workmanship under normal use and service for a period of (18) eighteen months from date of shipment. Our obligation under this warranty shall be limited to repairing or replacing any part or parts, (F.O.B. Orange, California), of your Data Aire unit, which, in our judgment, shows evidence of defect within the period of time heretofore set forth.
10.0 Contact Data Aire Address: DATA AIRE INC. 230 W. BLUERIDGE AVE. ORANGE, CA 92865 Phone: 714-921-6000 800-347-AIRE (2473) Toll Free Fax: 714-921-6010 714-921-6011 714-921-6022 Main Engineering Part Sales E-mail: tech_support@dataaire.com Technical Support engineering@dataaire.com Engineering sales@dataaire.com Sales Web site: www.dataaire.
RECOMMENDED LINE SIZING FOR AIR COOLED SPLIT SYSTEMS UP TO 200 EQUIVALENT FEET LIQUID LINES SINGLE CIRCUIT SYSTEMS Unit Tons per Tonnage Circuit 2 3 2 3 EQUIVALENT FEET 50 100 150 200 3/8 1/2 1/2 1/2 1/2 1/2 1/2 1/2 SUCTION LINES SINGLE CIRCUIT SYSTEMS EQUIVALENT FEET Unit Tons per 50 100 150 Tonnage Circuit HOR VER HOR VER HOR VER 2 3 HOR = HORIZONTAL 2 3 7/8 7/8 7/8 7/8 7/8 1-1/8 VERT = VERTICAL 24 7/8 7/8 7/8 1-1/8 7/8 7/8 200 HOR VER 1-1/8 1-1/8 7/8 7/8
Data Aire, Inc. Monthly Maintenance Inspection Checklist Model No.__________________ Prepared by: _______________ Serial No.
Data Aire, Inc. Quarterly Maintenance Inspection Checklist Model No. _______________________ Prepared by: _____________________ Serial No.
- F Fan Speed Control Systems .................... 15 Field Piping Air Cooled ........................................... 9 Chilled Water ...................................... 11 Condensate ........................................ 11 Condensing Unit .................................11 Fluid Cooler ....................................... 10 Glycol Cooled .................................... 10 Steam Generator Humidifier .............. 12 Water Cooled ....................................
- L Liquid Lines ..................................... 8, 9, 24 Leak Testing ........................................... 12 Locating Evaporator ........................................... 6 Secondary Heat Exchanger ............... 14 Low Pressure Cutout Switch.................... 18 - M Maintenance Bearings ............................................ 20 Filters ................................................ 20 Fuses ................................................ 21 Heating Elements ....................
Notes: _______________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ _____________________________________________
230 W. BlueRidge Avenue Orange, CA 92865 800-347-2473 www.dataaire.com e-mail: sales@dataaire.com A Member of the CS Group of Companies © 2011 Data Aire, Inc. Data Aire, Inc. reserves the right to make design changes for the purpose of product improvement or to withdraw any design without notice.
