Stulz CyberAir DX Series Installation, Operation And Maintenance Manual Download Page 55

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CyberAiR DX Floor Mounted IOM Manual

Appendix B- Glossary

B-1

Term

Definition

Term

Definition

ASHRAE

American Society of Heating, Refrigerating,
and Air-Conditioning Engineers

Information Technology

BTUH/Hr

British Thermal Units Per Hour

IOM

Installation, Operation, and Maintenance
Manual

CCD

Compact-CWE

kilowatt

CFM

Cubic Feet Per Minute

kVA

Kilo Volt Amps

CNDCT

Conductor

LWT

Leaving Water Temperature

CRAC

Computer Room Air Conditioner

MAX CKT
BKR

Maximum Circuit Breaker

CRAH

Computer Room Air Handler

MAX FUSE

Maximum Fuse

Chilled Water

MCA

Minimum Circuit Ampacity

Dry Bulb

NEC

National Electric Code

Downflow

NFPA

National Fire Protection Agency

Energy Efficiency

Phase

Electronically Commutated

PSI

Pounds Per Square Inch

Dewpoint

PSIG

Pounds Per Square Inch Gauge

Direct Expansion Systems

RLA

Run Load Amps

ESD

Electrostatic Discharge

RMA

Return Material Authorization

EST

Eastern Standard Time

R-Value

Thermal Resistance

ºF

Degrees Fahrenheit

SATS

STULZ Air Technology Systems, Inc.

FLA

Full Load Amps

SDS

Safety Data Sheet

FOB

Freight on Board

SPDT

Single Pole, Double Throw

HGBP

Hot Gas Bypass

Upflow

HACR

Heating, Air Conditioning, Refrigeration

Underwriters Laboratories

Horsepower

UPS

Uninterruptible Power Supply

HVAC

Heating, Ventilation and Air Conditioning

Volt

Heat Exchanger

Volt-Amperes

Hertz

VAC

Volt, Alternating Current

IAQ

Indoor Air Quality

VFD

Variable Frequency Drive

in. w.g.

Inches of Water Gauge

Watt(s)

Summary of Contents for CyberAir DX Series

Page 1: ...CyberAir DX Installation Operation and Maintenance Manual Perimeter Mounted Precision Air Conditioners 21 kW 105 kW 60 Hz...

Page 2: ...gy Systems Inc STULZ This document contains confidential and proprietary information of STULZ Air Technology Systems Inc Distributing or photocopying this document for external distribution is in dire...

Page 3: ...onnections 2 13 2 8 1 Main Power 2 13 2 8 2 Optional Equipment 2 15 2 8 2 1 Remote Temperature Humidity Sensor 2 15 2 8 2 2 Remote Water Detector 2 15 2 8 3 Interconnecting Remote Equipment 2 15 2 9 S...

Page 4: ...uration 1 9 Figure 5 Free Cooling Operation 1 10 Figure 6 Alternate Water Source Operation 1 11 Figure 7 Recommended Installation Clearance 2 1 Figure 8 Typical CFU Upflow Installation 2 2 Figure 9 Ty...

Page 5: ...stems D Downflow U Upflow 021 028 035 053 070 088 105 D DX 2 Dual Circuit A Air G Glycol W Water 0 None Water Side Economizer Alternate Water Source I In Unit 0 Standard T Tandem Compres sors S Specia...

Page 6: ...Hr Refer to the unit nameplate to identify the model number and cooling capacity of yourunit NOTE STULZ CyberAir systems are strictly for non residential applications The functional modes of operation...

Page 7: ...ell ventilated area Avoid inhalation of solvent fumes and prolonged exposure of skin to cleaning solvents Wash exposed skin thoroughly after contact with solvents This equipment should be serviced and...

Page 8: ...r thermal protective gloves and face shield goggles when working with refrigerant Application of excessive heat to any component will cause extreme pressure and may result in arupture Exposure of refr...

Page 9: ...ing to system capacity Figures 1 and 2 depict the internal layouts of STULZ upflow and downflow CyberAir units and identifies the major components Location of the major components may vary depending o...

Page 10: ...IR FILTERS CUT AWAY TO CONDENSATE PUMP LOCATION MAY Air Flo w Downflow Models Floor Discharge Air Flow Plenum Extension Optional Internal Air Filters Accessible Behind Front Cabinet Doors 1 4 1 Intern...

Page 11: ...ols energized the unit could begin operating at any time To prevent personal injury stay clear of rotating components as automatic controls may start them unexpectedly The main power service disconnec...

Page 12: ...f electronics e Over heating of motor If a communication loss occurs the fans will run at their last received output command until a new CyberAiR DX Floor Mounted IOM Manual command is received Modbus...

Page 13: ...in power service disconnect switches are provided on the door of the cabinet to connect two independent power sources see Figure3 Figure 3 Auto Transfer Disconnect Switches If the user selectable main...

Page 14: ...w Stage Cut in Offset Compressor s Capacity 1 2 F 1A 5 tons 2 3 F 2 10 tons 3 4 F 1B 2 15 tons 4 5 F 1A 1B 2 20 tons CyberAiR DX Floor Mounted IOM Manual 1 6 1 2 Four Stage Compressor Rotation Compres...

Page 15: ...e return air temperature s deviation from set point If the return air temperature continues to rise the free cooling valve position eventually reaches 100 open maximizing the flow of coolant through t...

Page 16: ...r if the AWS control valve reaches 100 open for the compressor delay period 20 seconds adjustable the compressor turns on and operates in parallel with AWS cooling The compressor runs until the cut ou...

Page 17: ...ped inside the air conditioner unless specified otherwise by the customer The plenum box if applicable is shipped separately Unpack and store these items in a safe place unless you are using them imme...

Page 18: ...unit is shipped on a skid to facilitate moving prior to installation The unit should always be stored indoors in a dry location prior to installation CAUTION When moving the unit it must be kept leve...

Page 19: ...cabinet s overall base dimension so the weight of the A C unit is supported by the stand Figure 9 Typical CFD Downflow Installation NOTE These units use welded frame construction for unit rigidity The...

Page 20: ...2 or 3 way discharge air plenum box see Figure 10 The return air pattern is front freereturn The supply air outlet is provided with a flange for connecting ductwork refer to the installation drawing...

Page 21: ...local codes when determining ducting requirements The duct system should be designed to allow the air to move with as little resistance as possible Figure 11 Downflow Configuration Air Patterns 2 6 O...

Page 22: ...weldment to raise or lower the floor stand Lock the height in place by tightening the top hex nut up against the fixed hex nut in the floor stand leg ATTACHMENT PLATES QUANTITY VARIES Low Seismic Flo...

Page 23: ...ews into the floor stand through the lower holes in the attachment plate and into the base of the A C unit through the upper holes in the plate Ensure all the screws are tightened Take care not to str...

Page 24: ...efield installed in the supply air stream Position the sensor at least 6 feet away from the supply air outlet The supply air temperature and humidity are monitored by the system controller and compare...

Page 25: ...d with your unit 2 7 Piping Connections Field piping connections for the system refrigerant water water glycol and optional hot water reheat piping are sweat connections CFD downflow units typically h...

Page 26: ...ning the standardequivalent lengths in feet of straight pipe Equivalent Length ft of Straight Pipe OD In Line Size Globe Valve Angle Valve 90 Elbow 45 Elbow Tee Line Tee Branch 1 2 9 0 5 0 0 9 0 4 0 6...

Page 27: ...the factory Before installing the interconnecting piping release the pressure via an available stem valve or Schrader valve prior to uncapping the pipes NOTE Water glycol cooled systems with low enter...

Page 28: ...installed from the end of the drain line to the inlet side of the condensate pump see Figure 14 2 7 4 Humidifier STULZ CyberAir systems utilize an electrode steam humidifier A water supply line for t...

Page 29: ...main power disconnect switch Do NOT rewire the unit s individual components WARNING Verify power is turned off before making connections to the equipment NOTE All wiring must conform to local and nat...

Page 30: ...ate with power source A unless a switchover 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 selec...

Page 31: ...ter cooled condenser do not require field wiring to external components other than to optional sensors as selected e g Flow Sensors Remote Supply Air T H sensor Air Pressure Customer Alarm Inputs 2 8...

Page 32: ...A 70 N E C SEE NOTE 1 2 Figure 17 Field Wiring Glycol Systems Single Point Power Connection Shown for Drycooler Pump Package Figure 18 Field Wiring Air Cooled Systems 2 16 MAIN POWER SUPPLY 208 575V 3...

Page 33: ...ding charge which must be removed before piping and charging the unit Before charging check the unit nameplate to confirm that charging is performed with the correct type of refrigerant CyberAiR syste...

Page 34: ...Approximate R 410A Charge Model Number Base Charge Circuit 1 Base Charge Circuit 2 CFD 021 D2A 2 7 lbs 2 7 lbs CFU 021 D2A 2 7 lbs 2 7 lbs CFD 028 D2A 2 7 lbs 2 7 lbs CFU 028 D2A 2 7 lbs 2 7 lbs CFD...

Page 35: ...at this point leaks may be detected by observing if there s been a change in the standing pressure after 12 hours A significant drop in pressure 10 psig indicates a leak in the system that needs to be...

Page 36: ...to charge 8 Replace the Schrader valve cores if you removed them during the evacuation steps You maynow introduce the refrigerant charge through the Schrader valves 2 9 5 Refrigerant ChargingProcedur...

Page 37: ...intake of the condenser 9 Fill out the applicable sections of the Warranty Registration and Start Up Checklist 2 9 5 1 20 F Variable Speed Control The following instructions are for charging systems...

Page 38: ...charge pressure at 445 psig and hold it constant The condenser fan nearest the condenser header should be operating continuously All other fans if additional fans exist should be off during this time...

Page 39: ...harge pressure during low ambient operation thus ensuring proper condensing temperature The head pressure control valve requires no adjustment While the fan is running the flooded head pressure contro...

Page 40: ...it operates in full hot gas bypass operation The valve is factory set and no adjustment should be necessary If adjustment is required block one half of the coil and remove the adjustment cap from the...

Page 41: ...ating a demand for humidification Use an amp meter to determine current draw of the humidifier Visually check for vapor leaving the steam head or feel if the cylinder is warm to verify if the humidifi...

Page 42: ...the sight glass indicate a low refrigerant charge or a clogged filter drier Check for humidity in the refrigerant by viewing the color of the indicator in the center of the sight glass and comparing...

Page 43: ...lines and capillaries for vibration isolation and support as necessary Check all refrigerant and coolant lines for signs of leaks 4 2 Troubleshooting Turn off all power to the unit before conducting...

Page 44: ...tage 5 seconds 3 Loss of phase 5 seconds After causes 1 2 and 3 aboveare corrected the motor will automatically reset After causes 4 and 5 below are corrected the fan s must be manually reset by turni...

Page 45: ...IRE COMPRESSOR Compressor Fails to Start a Temperature set point too high b Compressor internal protector is open c Complete loss of refrigerant charge low pressure safety switch d Condenser pressure...

Page 46: ...iring is faulty Check wiring against schematic and rewire if necessary c Actuator failed Replace actuator Electric Heater Inoperable a Circuit breaker tripped b Temperature set point too low c Overhea...

Page 47: ...stem to ensure there are no leaks prior to recharging the system 4 3 4 General Common Repairs Component Replacement 4 3 4 1 Compressor Failure The compressor is the most important component of the air...

Page 48: ...5 Remove the liquid line drier and install an oversized liquid line filter drier one size larger than the nor mal selection size 6 Check the expansion valve sight glass and other controls to see if cl...

Page 49: ...ace the new cylinder on the side mounting slots within the unit ensuring the cylinder mounting stubs are seated properly 14 Replace the cylinder plugs on the pins ensuring the white sensor plug goes o...

Page 50: ...00 a m to 5 00 p m EST After hours support is also available Please provide your name and contact information and a support technician will return your call When calling to obtain support it is import...

Page 51: ...customers a credit application must be prepared and approved this process could take one week A 25 minimum restocking charge will be applied on returned stocked parts that were sold as spare replacem...

Page 52: ...h is in On position 10 Plenum box installed if required 11 Filter s installed 12 Ductwork completed if required 13 Incoming line voltage matches equipment nominal nameplated rating tolerances 14 Main...

Page 53: ...switch operates freely Additional Check chilled water hot water circuits for air bleed as required Coils clean and clear of obstructions Humidifier cylinder and controls operate properly Tasks Y N Tas...

Page 54: ...w up actions below 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 numb...

Page 55: ...onal Fire Protection Agency E 2 Energy Efficiency PH Phase EC Electronically Commutated PSI Pounds Per Square Inch DP Dewpoint PSIG Pounds Per Square Inch Gauge DX Direct Expansion Systems RLA Run Loa...

Page 56: ...y 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...

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