Related Manuals for Stulz CyberAir DX Series
Summary of Contents for Stulz CyberAir DX Series
- Page 1 CyberAir ® Installation, Operation and Maintenance Manual Perimeter Mounted Precision Air Conditioners 21 kW - 105 kW / 60 Hz...
- Page 2 No part of this document may be photocopied, reproduced, or translated into another language for use by anyone other than the owner of the equipment for which this manual is written without the prior written consent of STULZ Air Technology Systems, Inc. (STULZ).
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Page 3: Table Of Contents
CyberAiR DX Floor Mounted IOM Manual TABLE OF CONTENTS Introduction ........1-1 Types of Control ......... 2-8 2.6.4.1 Remote Temperature/Humidity Sensor..2-8 General ............1-1 2.6.5 Remote Water Detector ......2-9 Product Description ........1-1 Piping Connections ........2-9 Safety ............1-2 2.7.1 Refrigerant Piping ........ - Page 4 CyberAiR DX Floor Mounted IOM Manual 4.3.4 General Common Repairs/ Component Replacement ......4-6 Appendix A - Forms 4.3.4.1 Compressor Failure ........4-6 Checklist for Completed Installation ......A-1 4.3.4.2 Standard Cleanout Procedure ....4-6 Periodic General Maintenance 4.3.4.3 Burn-Out Acidic Cleanout Procedure ..4-6 Checks and Service Checklist ........
- Page 5 CyberAiR DX Floor Mounted IOM Manual Nomenclature CFX-XXX-XXX-X-XX Additional Cooling Number of Secondary Capacity Heat Special Cooling Options Fan Location Method Circuits Pattern (kW) Rejection Options 0 = None Standard T CyberAir 021, 028, A = Air = Water Side = Tandem Floor Downflow...
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Page 6: Introduction
Technology Systems, Inc. (STULZ) and uses the latest, state-of-the-art control technology. The STULZ CyberAir unit is provided with a factory mounted, main power disconnect switch Recognized as a world leader, STULZ provides air conditioning systems with the highest quality with a lockable handle. -
Page 7: Safety
1.3.1 General Never lift any component in excess of 35 STULZ uses NOTES along with CAUTION and pounds without help. If a lifting device is used WARNING symbols throughout this manual to draw to move a unit ensure it is capable of your attention to important operational and safety supporting the unit. - Page 8 CyberAiR DX Floor Mounted IOM Manual Exposure of refrigerant to an open flame or a WARNING very hot surface will cause a chemical reaction that will form carbonyl chloride To prevent personal injury, stay clear of (hydrochloric/hydrofluoric acid); highly rotating components as automatic controls poisonous and corrosive gas commonly may start them unexpectedly.
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Page 9: General Design
General Design The STULZ CyberAir unit is housed in a steel frame type cabinet and is rated for indoor use. The cabinet is coated with a durable powder coat finish to protect against corrosion. Hinged doors are located on the front of the cabinet. -
Page 10: Internal Layout - Upflow Model
CyberAiR DX Floor Mounted IOM Manual Downflow Models Floor Discharge Flow Plenum Extension (Optional) Internal Air Filters Accessible Behind Front Cabinet Doors 1.4.1 Internal Layout - Upflow Model Figure 1 depicts a sample internal layout of a CFU (upflow) unit and identifies the major components. REFRIGERA HUMIDIFIER INLET MANUAL... -
Page 11: Internal Layout - Downflow Model
Off to gain access to the Start Protectors components within the electric STULZ CyberAir units incorporate state of the art box. The handle of the switch may be locked in the “Off” component protection with the use of motor start position to prevent unintended operation. -
Page 12: Coils
Humidifier to protect the motor and electronics against damage from jamming, phase loss or overheating. STULZ CyberAir systems may be equipped with The E² an optional electrode steam humidifier. For this controller monitors each fan via the modbus and if... -
Page 13: Condensate Pump
1.5.3 Water Detector As an option, STULZ offers spot type or strip/cable type water detectors (see Section 2.6.5). Upon sensing a leak, the water detector control circuit will signal the system controller of the alarm condition. -
Page 14: Tandem Compressor Option
CyberAiR DX Floor Mounted IOM Manual 1.6.1 Tandem Compressor Option 1.6.1.2 Four Stage Compressor Rotation An optional four stage cooling configuration is Compressors 1A and 1B rotate the lead role after each available which utilizes three compressors (two run cycle in the cooling mode. That is, after compressor small tandem compressors and one large 1A has completed an operating cycle as the primary compressor). -
Page 15: Free-Cooling Operation
CyberAiR DX Floor Mounted IOM Manual Free-Cooling Operation The free-cooling configuration is available to minimize the use of compressor operation during low ambient conditions for system energy savings. A FC (free-cooling) system utilizes a remote drycooler to provide water/glycol coolant to a free-cooling coil positioned within a DX refrigerant system. If outdoor air temperatures permit free-cooling operation (adjustable user set point), the free-cooling mode is enabled to take advantage of the low ambient conditions to provide cooling with partial use or without the use of the system compressor(s). -
Page 16: Alternate Water Source Operation
CyberAiR DX Floor Mounted IOM Manual Alternate Water Source Operation An alternate water source (AWS) system utilizes an independent chilled water source to provide coolant to an AWS cooling coil in the A/C unit. If AWS cooling is unable to handle the load, the separate DX refrigeration circuit can be utilized to assist. -
Page 17: Installation
Generally, all equipment ships “FOB Factory”. Ensure access is available for routing the piping and STULZ can assist in the claim filing process with the wiring if entering through the side of the cabinet. The freight company. Refer to Section 5.0 of this manual cabinet may be positioned in a corner and if necessary a for instructions. -
Page 18: Rigging
Ceiling R-38 the space. Wall R-21 See Figures 8 & 9. The STULZ CyberAir unit is Floor R-19 designed to be located directly on top of the floor Door (typically upflow) or on a raised floor (typically downflow). -
Page 19: Figure 9 Typical Cfd (Downflow) Installation
CyberAiR DX Floor Mounted IOM Manual If a floor stand is selected (for downflow units), see Section 2.6.1 and refer to the installation drawing provided. Cut out an opening in the raised floor slightly larger than the cabinet’s overall base dimension so the weight of the A/C unit is supported by the stand. -
Page 20: Air Distribution Connection
CyberAiR DX Floor Mounted IOM Manual Air Distribution Connection 2.5.1 Upflow Configuration Air Patterns In an upflow configured unit, the conditioned supply air has two methods of discharge: ducted or through a grilled, 2 or 3-way discharge air plenum box (see Figure 10). The return air pattern is front free return. The supply air outlet is provided with a flange for connecting ductwork (refer to the installation drawing provided with the unit). -
Page 21: Downflow Configuration Air Patterns
CyberAiR DX Floor Mounted IOM Manual 2.5.2 Downflow Configuration Air Patterns In a downflow configured unit, the conditioned supply air discharges through the bottom of the cabinet into a raised floor. There are two basic return air distribution methods: top free return and top ducted return (see Figure 11). - Page 22 CyberAiR DX Floor Mounted IOM Manual 2.6.1.1 Floor Stand Height Adjustment Standard and Low Seismic Floor Stands: Standard Floor Stands- First loosen the middle hex nut (jam nut) on each leg. Turn the top hex nut to raise or lower the floor stand. Lock the height by tightening the middle hex nut up against the top hex nut.
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Page 23: Plenum Box
CyberAiR DX Floor Mounted IOM Manual High Seismic 12” and Taller Floor Stands: To adjust the height of a high seismic floor stand, first loosen the top hex nut and bottom hex nut on each leg. Next, turn the middle hex nut to raise or lower the floor stand. -
Page 24: Condensate Pump
A/C unit. The return air temperature and used. As an option, a 75 foot or 150 foot long cable humidity are monitored by the system controller and may be provided by STULZ. Follow the steps below to compared mount the sensor. -
Page 25: Remote Water Detector
When considering how to route the piping and wiring the sub-floor or in a field supplied auxiliary drain for CFU units furnished without top piping, entry pan located beneath the unit. STULZ provides 2 holes may be drilled through either the floor of the types of water detectors: cabinet or through a side panel. - Page 26 Each valve, fitting and bend in the In the following tables, the line sizes are for refrigerant line must be considered in this calculation. individual refrigeration circuits. STULZ CyberAir- DX units must have two separate Pipe sizes are given for “equivalent feet”, not linear feet. Do pairs of refrigeration lines.
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Page 27: Water/Glycol And Hot Water Piping
The recommended ethylene glycol solution Consult ASHRAE standards and refer to the ratio is 40% glycol to 60% water. (STULZ Copeland applications data guide for more detailed recommends information regarding refrigerant line traps and line Dowtherm SR1 manufactured by Dow Chemical sizing. -
Page 28: Condensate Pump
Humidifier NOTE Pour some water into the condensate drain STULZ CyberAir systems utilize an electrode pan prior to start-up. This fills the trap and steam humidifier. A water supply line for the prevents air from being drawn up the drain humidifier must be connected to the end of the lines. -
Page 29: 2.8 Utility Connections
CyberAiR DX Floor Mounted IOM Manual 2.8 Utility Connections The unit is provided with terminals for all required field-wiring. Refer to the electrical schematic 2.8.1 Main Power supplied with the unit when making the power and control field-wiring connections. It is important to It is important that the unit nameplate be examined to identify the options that were purchased with the determine the operating voltage, frequency and... -
Page 30: Figure 16 Electric Box
(auto or manual) occurs. See Section 1.5.6. The size of the electric box and location of components vary according to the STULZ CyberAir model and options selected. Figure 16 shows a sample electric box layout (with dual power option) and identifies the major components. -
Page 31: Optional Equipment
CyberAiR DX Floor Mounted IOM Manual 2.8.2 Optional Equipment 2.8.3 Interconnecting Remote Equipment Additional control conductors may be required 2.8.3.1 Water Cooled Systems depending on the options purchased with the (CFD/CFU-_ _ _-D2W equipment. Refer to the supplied electrical Models) schematic to determine the total number of Systems equipped with an internal water cooled interconnecting conductors required for your... -
Page 32: Figure 18 Field Wiring Air Cooled Systems
CyberAiR DX Floor Mounted IOM Manual MAIN POWER SUPPLY 208-575V/3PH/60Hz INTERCONNECTING FIELD WIRING (TO BE INSTALLED IN ACCORDANCE WITH NFPA 70, N.E.C.) MAIN POWER SUPPLY 208-575V/3PH/60Hz DRYCOOLER (GLYCOL UNITS ONLY) INTERCONNECTING FIELD WIRING (TO BE INSTALLED IN ACCORDANCE WITH NFPA 70, N.E.C.) SEE NOTE 1 24VAC ELECTRIC... -
Page 33: 2.9 System Charging Procedures
CyberAiR DX Floor Mounted IOM Manual 2.9 System Charging Procedures is performed with the correct type of refrigerant. CyberAiR systems utilize R-410A 2.9.1 Water-Water/Glycol Systems refrigerant. NOTE All self-contained water-water/glycol cooled units (units that require no refrigerant field piping) are Refrigerant charging must be performed by factory charged with R-410A refrigerant. - Page 34 12.3 lbs 12.2 lbs Table 2 shows the estimated charge weights for each compressor circuit in STULZ condensers. A receiver is included with the condenser if it is designed for applications where ambient conditions may drop to -30°F or lower. When selecting the condenser refrigerant weight from Table 2, determine if your condenser includes a receiver and ensure you select the charge weight from the correct column in the table.
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Page 35: Preparing System For Charging
10 ton (CFD-035-D2A) A/C EVACUATE THE SYSTEM unit, connected with a 1/2” x 30 foot liquid line and 7/8” x 30 foot discharge line to a STULZ Model CAUTION SCS-252-DSA dual circuit condenser. A proper vacuum must be drawn on the... -
Page 36: Refrigerant Charging Procedures
CyberAiR DX Floor Mounted IOM Manual NOTE 2.9.5 Refrigerant Charging Procedures When pulling a vacuum, the Schrader valves will R-410A refrigerant must be weighed in when unnecessarily restrict the openings, increasing the performing the charge. Referring to Section 2.9.3, evacuation time. During the evacuation process it is calculate the estimated amount of refrigerant recommended to remove the Schrader valve cores needed for your system. - Page 37 CyberAiR DX Floor Mounted IOM Manual 2.9.5.1 -20ºF Variable Speed Control Referring to Section 3.0, start the A/C system and use the system controller to lower the The following instructions are for charging systems room temperature set point 3-5°F below actual with condenser variable fan speed control using room temperature thus ensuring cooling R-410A refrigerant.
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Page 38: 2.9.6 Refrigerant Characteristics
CyberAiR DX Floor Mounted IOM Manual 2.9.5.2 -30°F Ambient Applications R-410A Refrigerant Pressure/Temperature Settings For units designed for -30°F operation, a receiver is Normal Min. Max. used to store the refrigerant during the time the Sub-cooling °F condenser is not utilizing the extra refrigerant charge. - Page 39 CyberAiR DX Floor Mounted IOM Manual 2.9.6 Head Pressure Controls- Air Cooled While the fan is running, the flooded head pressure Systems control valve modulates the amount of discharge gas entering the receiver. As the pressure 2.9.6.1 -20°F Condenser Fan Speed increases, the valve diverts more discharge gas to the condenser, allowing more liquid to flow from Used for outdoor or indoor installations where ambient...
- Page 40 2.9.8 Electronic Expansion Valve 2.9.10 Hot Gas Reheat (Optional) STULZ CyberAir precision A/C units utilize an expansion valve for each refrigeration circuit. The The hot gas reheat feature incorporates a hot gas electronically controlled expansion valve (EEV) reheat solenoid valve and a hot gas reheat coil.
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Page 41: Start-Up/Commissioning
For Hot Water Reheat ensure that 3. Apply power to the STULZ CyberAir system at the control signal has energized the hot water the main power disconnect switch. control valve and the temperature of the water has decreased as it 4. -
Page 42: Periodic General Maintenance
If Systematic, periodic general maintenance of the humidity is present, the system must be evacuated STULZ CyberAir system is recommended for and recharged. optimum performance. General maintenance should include, but is not limited to the following: replacing... -
Page 43: Humidifier
CyberAiR DX Floor Mounted IOM 4.1.2 Humidifier 4.1.3 Condensate Pump The steam cylinder has a limited lifetime and must The condensate pump should be inspected semi- be replaced periodically. Because water conditions annually and cleaned. Ensure that the float works and humidifier usage rates vary greatly, it is difficult freely. - Page 44 CyberAiR DX Floor Mounted IOM Manual SYMPTOM PROBABLE CAUSE RECOMMENDATION 1. Check main power source voltage. 2. Check power input cable. Reset motor starter protector and check amperage of motor. Check for short circuit or ground fault, if a. Power failure. none, reset circuit breaker.
- Page 45 CyberAiR DX Floor Mounted IOM Manual SYMPTOM PROBABLE CAUSE RECOMMENDATION Condenser Pressure g. Flow of water/glycol too low. (cont.) 4. Check all strainers and clean if too High (cont.) needed. h. Water/glycol solution not mixed Remove solution and premix. prior to adding to system. Refill system.
- Page 46 CyberAiR DX Floor Mounted IOM Manual SYMPTOM PROBABLE CAUSE RECOMMENDATION Check for leak. Repair and d. Lack of refrigerant. recharge system. 1. Supply and/or return grilles are e. Short circuiting of conditioned air. incorrectly oriented. Reorient grilles. 2. Supply and return grilles are too Compressor Short Cycles close together.
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Page 47: Field Service
CyberAiR DX Floor Mounted IOM Manual Field Service 4.3.4 General Common Repairs/ Component Replacement NOTE Do not attempt to make repairs without the 4.3.4.1 Compressor Failure proper tools. The compressor is the most important component of the air conditioner. Numerous safety devices It may be necessary to perform repairs on the A/C are pro- vided to protect the compressor from system. -
Page 48: Standard Cleanout Procedure
CyberAiR DX Floor Mounted IOM Manual Remove the burned out compressor and install CAUTION the new compressor. Damage replacement compressor Install a suction line filter-drier designed for caused improper system cleaning acid removal. constitutes abuse under the terms of the Remove the liquid line drier and install an warranty. -
Page 49: Filter Replacement
CyberAiR DX Floor Mounted IOM Manual NOTE 13. Place the new cylinder on the side mounting slots within the unit, ensuring the cylinder Decrease the humidity set point below mounting stubs are seated properly. ambient humidity to allow the cylinder to cool 14. -
Page 50: Product Support
5.1 Factory Authorized Start Up/Warranty Department at (888) 529-1266 Monday through Inspection Friday from 8:00 a.m. to 5:00 p.m. EST. A support technician at STULZ STULZ recommends purchasing Factory Authorized will provide troubleshooting assistance over the Start Up/Warranty Inspection for all new STULZ telephone. -
Page 51: Obtaining Spare/Replacement Parts
To receive credit for returned repair/replacement parts, the parts must be returned to STULZ within 30 days of the purchase date. Spare part sales over 30 days old will be considered final and the parts will remain the sole... -
Page 52: Appendix A -Forms
CyberAiR DX Floor Mounted IOM Manual APPENDIX A —FORMS Checklist for Completed Installation Ductwork completed (if required). Proper clearances for service access have been maintained around equipment. 13 Incoming line voltage matches equipment nominal nameplated rating ± ... - Page 53 CyberAiR DX Floor Mounted IOM Manual STULZ USA (888) 529-1266 www.stulz-usa.com Maintenance Checklist Prepared Model Number Title Item Number Date Serial Number Monthly Filters Fans Condensate Drain Fan(s) Cleanliness Drain is open rotate Condensate pan safety switch operates obstructions freely...
- Page 54 If you need technical support, call 888 529 1266 or email stulztechnicalsupport@stulz- ats.com. Support is available 24/7/365. Provide the model number, serial number, and STULZ item number from the unit nameplate. This will speed up the process and ensure accuracy.
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Page 55: Appendix B- Glossary
Run Load Amps Electrostatic Discharge Return Material Authorization Eastern Standard Time R-Value Thermal Resistance ºF Degrees Fahrenheit SATS STULZ Air Technology Systems, Inc. Full Load Amps Safety Data Sheet Freight on Board SPDT Single Pole, Double Throw HGBP Hot Gas Bypass Upflow... - Page 56 North American Headquarters STULZ Air Technology Systems, Inc. 1572 Tilco Drive | Frederick, MD 21704 301.620.2033 | Fax: 301.662.5487 | info@stulz-ats.com Technical Support: 888.529.1266 www.stulz-usa.com OCS0135-- April 2019 © STULZ Air Technology Systems, Inc. - Specifications subject to change without notice.
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