York YLAA Operation Manual Download

Page: 1 / 64

FORM 150.72-EG6 (516)

MODEL YLAA

AIR-COOLED SCROLL CHILLERS

WITH BRAZED PLATE HEAT EXCHANGERS

STYLE B

55 – 175 TON

195 – 615 kW

60 Hz

R-410A

Summary of Contents for YLAA

Page 1: ...FORM 150 72 EG6 516 MODEL YLAA AIR COOLED SCROLL CHILLERS WITH BRAZED PLATE HEAT EXCHANGERS STYLE B 55 175 TON 195 615 kW 60 Hz R 410A ...

Page 2: ...nts in Refrigeration and Air Conditioning Equipment and Systems N E C National Electrical Code OSHA Occupational Safety and Health Act Nomenclature YL A A 0125 H 46 X C B YL YORK CHILLER A AIR COOLED S STANDARD EFFICIENCY H HIGH EFFICIENCY REFRIGERANT R 410A DESIGN SERIES A AMERICAS FOUR DIGIT UNIT NUMBER VOLTAGE CODE 17 200 3 60 28 230 3 60 40 380 3 60 46 460 3 60 58 575 3 60 DEVELOPMENT LEVEL B ...

Page 3: ...TINGS 24 UNIT DIMENSIONS 26 ISOLATOR LOCATIONS 32 ISOLATOR DETAILS 36 ELECTRICAL NOTES 39 VARIABLE SPEED PUMP ELECTRICAL DATA 41 WIRING LUGS 42 ELECTRICAL DATA WITHOUT PUMPS 44 WIRING DIAGRAM 48 USER CONTROL WIRING 52 APPLICATION DATA 53 GUIDE SPECIFICATIONS 55 SI METRIC CONVERSION 63 Performance data provided in this document was created in accordance with Johnson Controls software YORKworks vers...

Page 4: ...JOHNSON CONTROLS FORM 150 72 EG6 516 4 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 5: ...Factory cut grooves or optional flanges make pip ing connections simple Optional factory installed pump kits eliminate the time cost and mechanical equipment room space necessary to install chilled water pumps Press the start button with confidence your YLAA has been run tested at the factory to ensure that you will have a successful start up Reliability The YLAA chiller is proven and reliable des...

Page 6: ...ured When factory mounted pump kits are considered there are now more pump sizes to choose from The optional kits come standard with valves pressure ports flow switch and strainer for quick hook up and frost protection to prevent freeze up There are also more pump options available variable speed drives dual pumps service shut off valves expansion tanks and additional test ports for temperature an...

Page 7: ... serviced near the outside edge The condenser heat exchangers are light enough that no crane is required for replacement And when it s time to clean them city tap water with water pressure typical of a spray from a common garden hose is all that s needed AHRI CERTIFICATION PROGRAM YORK YLAA chillers have been tested and certified by Air Conditioning Heating and Re frigeration Institute AHRI in acc...

Page 8: ... is coated with baked on powder paint which when subjected to ASTM B117 1000 hour salt spray test ing yields a minimum ASTM 1654 rating of 6 Units are designed in accordance with NFPA 70 National Electric Code ASHRAE ANSI 15 Safety code for mechanical refrig eration ASME and rated in accordance with AHRI Standard 550 590 and 551 591 COMPRESSORS The chiller has suction gas cooled hermetic scroll co...

Page 9: ...channels The arrangement is similar to older plate and frame technology but without gaskets and frame parts Water inlet and outlet connections are 3 in diameter and are grooved for compatibility with field supplied ANSI AWWA C 606 couplings A 20 mesh wye strainer is provided as standard to provide protection at the evaporator inlet particularly at system start up when construction debris may be pr...

Page 10: ...material to avoid galvanic corrosion due to dissimilar metals Coils and headers are brazed as one piece Integral sub cooling is included The design working pressure of the coil is 650 PSIG 45 BarG Condenser coil is easily washable with clear water up to 100 PSI 7 bar Fans The condenser fans are composed of corrosion resistant aluminum hub and glass fiber reinforced poly propylene composite blades ...

Page 11: ... chiller will operate to meet the load demand The control system includes native BACnet MS TP Modbus and N2 communications with LON protocol served through an optional eLink communications card The operating program is stored in non volatile memory EPROM so power failures and battery discharge will not require reprogramming the chiller Programmed setpoints are retained in lithium battery backed RT...

Page 12: ...city possible while remaining within the unit operating envelope If a fault prevents the unit from starting or causes it to shutdown the chiller will attempt to restart three times If it cannot start a manual reset is required to alert the operator about the fault condition The fault history is stored in the unit controller RTC memory for the last six fault shutdown conditions An RS 232 port provi...

Page 13: ...liquid temperature Low leaving liquid temperature cut out setting Low ambient temperature cut out setting Outdoor air temperature English or Metric data Suction pressure cut out setting Each system suction pressure Discharge pressure optional Anti recycle timer status for each system Anti coincident system start timer condition Compressor run status No cooling load condition Day date and time Dail...

Page 14: ...eset via up to two steps of demand load limiting depending on model The standard control panel can be directly connected to a Johnson Controls Building Automated System via the standard on board RS232 communication port Factory installed POWER PANEL Each panel contains Compressor power terminals Compressor motor starting contactors per l E C Control power terminals to accept incoming for 115 1 60 ...

Page 15: ...ONTROLS 15 Figure 1 GENERAL UNIT COMPONENTS Unit Components FAN DECK MICROCHANNNEL COILS COIL HEADERS CONTROL AND POWER PANELS COMPRESSORS BRAZED PLATE EVAPORATOR FORMED STEEL BASE RAILS HYDRO KIT PUMPS AND MOTORS OPTIONAL LD18426 ...

Page 16: ...ith NEC Article 440 14 can be supplied to isolate the power voltage for servicing This option includes the Single Point Power connection Multiple Point Supply With Individual System Circuit Breakers Two unit mounted cir cuit breakers with external lockable handles in compliance with NEC Article 440 14 can be supplied to isolate the power voltage for servicing SQ only Control Transformer Converts u...

Page 17: ...porator Nozzle Extension Kit Pipe and ANSI AWWA C 606 fittings to extend the evaporator connections to the outside of the chiller Includes the Thermal Dispersion Flow Switch Provided as standard on all chillers but can be deleted if alternate or existing pip ing and flow switch is field supplied The extension pipe is secured to the chiller frame for shipping to avoid risk of damage to evaporator a...

Page 18: ...nser Louvered Panels for winter applications where wind gusts may exceed five miles per hour 8 kph The following types of enclosure panels are available Wire Panels Full Unit Consists of welded wire mesh guards mounted on the exterior of the unit Prevents unauthorized access yet provides free air flow Wire Louvered Panels Consists of welded wire mesh panels on the bottom part of unit and louvered ...

Page 19: ...ne layer of heavy duty anti vibration material thickness of 1 8 3mm Both are closed by two sheets of welded PVC reinforced for tem perature and UV resistance Ultra Quiet Fans Lower RPM 8 pole fan motors are used with steeper pitch fans Variable Speed Fans Controls all the fans on the circuit There is a drive installed for each circuit Available on both low sound and ultra quiet fans VIBRATION ISOL...

Page 20: ... 100 385 0 125 0101HE 40 55 100 385 0 125 0125HE 40 55 100 385 0 125 0142HE 40 55 150 625 0 125 0156HE 40 55 150 625 0 125 0175HE 40 55 150 625 0 125 Design Parameters NOTES 1 For leaving liquid temperature below 40 F 4 C to 10 F 12 C optional low temperature glycol kit re quired Contact your nearest Johnson Controls Office for application requirements 2 For leaving liquid temperature higher than ...

Page 21: ...sure Drop EVAPORATOR YLAA MODELS A 0058HE 0065HE 0070SE B 0080SE C 0089SE 0100SE 0092HE 0101HE 0125HE D 0081HE 0136SE 0170SE 0156HE E 0120SE 0155SE 0142HE F 0175HE YLAA EVAPORATOR PRESSURE DROP CURVE WATER FLOW RATE GPM WATER PRESSURE DROP PSI LD18432 ...

Page 22: ...3623 3954 4241 4864 5293 6232 6524 7818 COMPRESSORS SCROLL TYPE Compressors per circuit 3 3 3 3 3 3 3 2 2 2 3 3 3 2 3 3 Compressors per unit 6 6 6 5 4 6 5 6 NOMINAL TONS PER COMPRESSOR Circuit 1 13 15 15 15 32 32 32 32 Circuit 2 13 13 15 32 32 15 32 32 CONDENSER Total Face Area ft2 106 9 106 9 106 9 133 6 160 3 213 8 213 8 267 2 Number of Rows 1 1 1 1 1 1 1 1 Fins per Inch 20 20 20 20 20 20 20 20 ...

Page 23: ...9 7428 8001 COMPRESSORS SCROLL TYPE Compressors per circuit 2 2 3 2 3 3 3 3 3 2 2 2 3 3 3 2 3 3 Compressors per unit 4 5 6 6 5 4 6 5 6 NOMINAL TONS PER COMPRESSOR Circuit 1 15 13 15 15 15 32 32 32 32 Circuit 2 15 15 13 15 32 32 15 32 32 CONDENSER Total Face Area ft2 106 9 106 9 106 9 160 3 160 3 213 8 213 8 267 2 267 2 Number of Rows 1 1 1 1 1 1 1 1 1 Fins per Inch 20 20 20 20 20 20 20 20 20 CONDE...

Page 24: ...KW AMBIENT F UNIT EER 100 0 95 6 111 5 95 0 9 6 86 1 86 5 88 5 89 3 10 7 57 0 64 5 45 4 75 5 14 4 43 0 47 4 34 4 64 7 15 1 13 9 16 0 8 5 55 0 18 7 IPLV 14 5 YLAA0120SE DISPL TONS COMPR KW AMBIENT F UNIT EER 100 0 118 1 134 6 95 0 9 8 75 0 96 6 84 1 84 1 12 3 50 0 71 0 43 1 71 1 16 0 25 0 33 0 22 0 55 0 16 7 IPLV 15 0 YLAA0136SE DISPL TONS COMPR KW AMBIENT F UNIT EER 100 0 126 1 142 6 95 0 9 6 83 3...

Page 25: ...19 4 IPLV 16 1 YLAA0101HE DISPL TONS COMPR KW AMBIENT F UNIT EER 100 0 98 3 106 1 95 0 10 1 86 1 89 3 82 8 89 5 11 5 57 0 65 6 43 7 75 1 14 6 43 0 50 3 30 5 65 7 17 0 13 9 16 0 8 5 55 0 19 0 IPLV 15 7 YLAA0125HE DISPL TONS COMPR KW AMBIENT F UNIT EER 100 0 116 0 112 0 95 0 10 3 75 0 94 6 76 8 83 9 12 6 50 0 67 2 43 5 69 7 16 0 25 0 34 9 18 3 55 0 19 3 IPLV 15 7 YLAA0142HE DISPL TONS COMPR KW AMBIE...

Page 26: ...ing in unpredictable airflow patterns and possible diminished performance The unit controls will optimize operation without nuisance high pressure safety cut outs however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring isolators Recommended minimum clearances Side to wall 6 rear to wall 6 control pan...

Page 27: ...elow resulting in unpredictable airflow patterns and possible diminished performance The unit controls will optimize operation without nuisance high pressure safety cut outs however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring isolators Recommended minimum clearances Side to wall 6 rear to wall 6 ...

Page 28: ...possible diminished performance The unit controls will optimize operation without nuisance high pressure safety cut outs however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring isolators Recommended minimum clearances Side to wall 6 rear to wall 6 control panel to end wall 4 0 top no obstructions all...

Page 29: ...minished performance The unit controls will optimize operation without nuisance high pressure safety cut outs however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring isolators Recommended minimum clearances Side to wall 6 rear to wall 6 control panel to end wall 4 0 top no obstructions allowed distan...

Page 30: ...ed performance The unit controls will optimize operation without nuisance high pressure safety cut outs however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring isolators Recommended minimum clearances Side to wall 6 rear to wall 6 control panel to end wall 4 0 top no obstructions allowed distance bet...

Page 31: ...minished performance The unit controls will optimize operation without nuisance high pressure safety cut outs however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring isolators Recommended minimum clearances Side to wall 6 rear to wall 6 control panel to end wall 4 0 top no obstructions allowed distan...

Page 32: ...tions FOUR FAN ISOLATOR LOCATIONS YLAA0070SE YLAA0080SE YLAA0089SE FOUR FAN ISOLATOR LOCATIONS YLAA0058HE YLAA0065HE YLAA0081HE LD19400 1 4 1 4 LD18438 All dimensions are inches unless otherwise specified Dimensions indicate isolator mounting centerlines ...

Page 33: ...A0100SE YLAA0120SE YLAA0092HE YLAA0101HE Isolator Locations Cont d EIGHT FAN ISOLATOR LOCATIONS YLAA0125HE YLAA 0136SE YLAA0155SE YLAA0142HE TOP VIEW LD18439 TOP VIEW LD18440 All dimensions are inches unless otherwise specified Dimensions indicate isolator mounting centerlines ...

Page 34: ...150 72 EG6 516 34 TEN FAN ISOLATOR LOCATIONS YLAA 0170SE YLAA0156HE YLAA0175HE Isolator Locations Cont d TOP VIEW LD18441 All dimensions are inches unless otherwise specified Dimensions indicate isolator mounting centerlines ...

Page 35: ...FORM 150 72 EG6 516 JOHNSON CONTROLS 35 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 36: ... 145 2 3 58 140 16 490 222 YELLOW 16 3 Y2RSI 2D 460 460 209 2 3 58 200 23 688 312 GREEN 11 3 Y2RSI 2D 710 710 322 2 2 56 330 37 1072 486 DK BROWN 7 3 Y2RSI 2D 870 870 395 1 9 48 460 52 1312 595 RED 6 Y2RSI 2D 1200N 1200 544 1 9 48 638 72 1818 825 RED BLACK 4 3 Y2RSI 2D 1450 1450 658 1 8 46 900 102 2450 1111 TAN 3 6 Y2RSI 2D 1690 1690 767 1 7 43 1140 129 2892 1312 PINK 3 1 Y2RSI 2D 2000N 2000 907 1...

Page 37: ...D 120 120 54 1 2 30 DK YELLOW CP1 1D 175 175 79 1 17 30 DK BLUE CP1 1D 250 250 113 1 4 36 YELLOW CP1 1D 340 340 154 1 13 29 RED CP1 1D 510 510 231 1 02 26 BLACK CP1 1D 675 675 306 1 32 34 DK PURPLE CP1 1D 900 900 408 1 02 26 DK GREEN CP1 1D 1200 1200 544 0 9 23 GRAY CP1 1D 1360 1360 617 0 77 20 WHITE CP1 1D 1785N 1785 810 0 88 22 GRAY RED MOUNT RATED CAPACITY LBS KG DEFLECTION RATED IN MM COLOR CO...

Page 38: ...BRICK RED WR 525 238 0 5 12 50 RD3 LIME WR 750 340 0 5 12 60 RD3 CHARCOAL WR 1100 499 0 5 12 70 RD4 RATED CAPACITY LBS KG RATED DEFLECTION INCHES MM DURO 5 RD4 BROWN WR 1500 680 0 5 12 40 RD4 BRICK RED WR 2250 1021 0 5 12 50 RD4 LIME WR 3000 1361 0 5 12 60 RD4 CHARCOAL WR 4000 1814 0 5 12 70 MOUNT TYPE DIMENSION DATA INCHES MM L W HF AL AD BT CD DW RD3 WR 5 5 139 7 3 38 85 85 2 88 73 15 4 13 104 9...

Page 39: ...Article 440 22 5 Circuit breakers must be UL listed and CSA certified and maximum size is based on 225 of the rated load amps for the largest motor plus 100 of the rated load amps for all other loads included in the circuit Otherwise HACR type circuit break ers must be used Maximum HACR circuit breaker rating is based on 225 of the rated load amps for the largest motor plus 100 of the rated load a...

Page 40: ...RY MOUNTED CIRCUIT BREAKER FLA FULL LOAD AMPS HZ HERTZ MAX MAXIMUM MCA MINIMUM CIRCUIT AMPACITY MIN MINIMUM MIN NF MINIMUM NON FUSED RLA RATED LOAD AMPS S P WIRE SINGLE POINT WIRING UNIT MTD SERV SW UNIT MOUNTED SERVICE NON FUSED DISCONNECT SWITCH LRA LOCKED ROTOR AMPS VOLTAGE CODE 17 208 3 60 28 230 3 60 40 380 3 60 46 460 3 60 58 575 3 60 Electrical Notes Cont d ...

Page 41: ... 10 9 22 6 6 18 2 5 5 14 6 4 4 I 5 1800 15 4 4 6 13 3 9 7 9 2 4 6 5 2 5 2 1 6 J 15 3600 43 12 9 36 4 10 9 22 6 6 18 2 5 5 14 6 4 4 K 20 3600 54 16 2 45 13 5 28 7 8 6 22 5 6 8 18 5 4 L 3 1800 9 5 2 9 8 2 4 4 7 1 4 4 1 2 3 2 1 M 10 3600 23 2 7 18 4 5 5 11 1 3 3 9 2 2 8 7 4 2 2 N 20 3600 54 16 2 45 13 5 28 7 8 6 22 5 6 8 18 5 4 P 5 1800 15 4 4 6 13 3 9 7 9 2 4 6 5 2 5 2 1 6 R 15 3600 43 12 9 36 4 10 ...

Page 42: ... 0 250 1 250 500 230 60 2 6 500 2 250 500 3 2 0 400 2 3 0 250 1 250 500 380 60 1 6 500 2 3 0 250 1 250 500 1 6 350 460 60 1 6 500 1 6 350 1 6 350 575 60 1 6 500 1 6 350 1 6 350 0081 208 60 2 6 500 2 250 500 3 2 0 400 3 2 0 400 2 250 500 230 60 2 6 500 2 250 500 3 2 0 400 3 2 0 400 2 250 500 380 60 1 6 500 1 250 500 2 3 0 250 2 3 0 250 1 250 500 460 60 1 6 500 1 250 500 2 3 0 250 1 6 350 575 60 1 6...

Page 43: ...50 1 250 500 400 460 60 1 6 500 1 250 500 2 3 0 250 1 250 500 2 3 0 250 575 60 1 6 500 1 250 500 2 3 0 250 1 250 500 2 3 0 250 0136 0142 208 60 2 6 500 2 250 500 3 2 0 400 2 250 500 3 2 0 400 230 60 380 60 2 6 500 3 2 0 400 2 250 500 2 3 0 250 1 250 500 400 460 60 1 6 500 1 250 500 2 3 0 250 1 250 500 2 3 0 250 575 60 1 6 500 1 250 500 2 3 0 250 1 250 500 2 3 0 250 0150 0155 0158 0156 208 60 3 2 0...

Page 44: ...0 134 200 150 150 21 5 132 21 5 132 21 5 132 2 2 9 15 3 81 208 60 363 400 400 400 57 7 284 57 7 284 57 7 284 2 7 6 44 230 60 363 400 400 400 57 7 330 57 7 330 57 7 330 2 7 4 37 380 60 201 250 225 225 30 9 192 30 9 192 30 9 192 2 4 5 23 1 460 60 177 250 200 200 26 9 180 26 9 180 26 9 180 2 4 19 575 60 134 200 150 150 21 5 132 21 5 132 21 5 132 2 2 9 15 3 89 208 60 391 600 450 450 57 7 284 57 7 284 ...

Page 45: ...37 150 150 150 17 4 109 17 4 109 17 4 109 2 2 9 15 3 81 208 60 388 400 400 400 48 5 249 48 5 249 48 5 249 2 7 6 44 230 60 384 400 400 400 48 5 288 48 5 288 48 5 288 2 7 4 37 380 60 214 250 225 225 27 6 159 27 6 159 27 6 159 2 4 5 23 1 460 60 187 200 200 200 24 4 145 24 4 145 24 4 145 2 4 19 575 60 137 150 150 150 17 4 109 17 4 109 17 4 109 2 2 9 15 3 89 208 60 416 600 450 450 57 7 284 57 7 284 57 ...

Page 46: ...0 60 338 600 400 400 64 3 355 64 3 355 64 3 355 5 4 5 23 1 460 60 285 400 300 300 53 1 290 53 1 290 53 1 290 5 4 19 575 60 226 400 250 250 42 5 255 42 5 255 42 5 255 5 2 9 15 3 155 208 60 618 800 700 700 106 2 523 106 2 523 106 2 523 4 7 6 44 230 60 617 800 700 700 106 2 578 106 2 578 106 2 578 4 7 4 37 380 60 374 600 400 400 64 3 355 64 3 355 64 3 355 4 4 5 23 1 460 60 311 400 350 350 53 1 290 53...

Page 47: ... 330 57 7 330 3 7 4 37 380 60 338 400 400 400 30 9 192 30 9 192 30 9 192 3 4 5 23 1 460 60 285 400 300 300 26 9 180 26 9 180 26 9 180 3 4 19 575 60 226 250 250 250 21 5 132 21 5 132 21 5 132 3 2 9 15 3 155 208 60 618 800 700 700 106 2 523 106 2 523 4 7 6 44 230 60 617 800 700 700 106 2 578 106 2 578 4 7 4 37 380 60 374 400 400 400 64 3 355 64 3 355 4 4 5 23 1 460 60 311 400 350 350 53 1 290 53 1 2...

Page 48: ...JOHNSON CONTROLS FORM 150 72 EG6 516 48 Wiring Diagram ...

Page 49: ...FORM 150 72 EG6 516 JOHNSON CONTROLS 49 LD18444 Wiring Diagram Cont d ...

Page 50: ...ON CONTROLS FORM 150 72 EG6 516 50 MANUAL MOTOR STARTER COMP FIELD MOUNTED AND WIRED ON REMOTE EVAP UNITS ARE NOT SUPPLIED BY JOHNSON CONTROLS ENTERING CHILLED TEMP MOTOR PROTECTOR COMP Wiring Diagram Cont d ...

Page 51: ... and its controls 1 Refer to instalation commisioning operation and maintenance manual for customer connections and cus tomer connection notes non compliance to these instructions will invalidate unit warranty 2 Wiring and components for compressor 3 only fitted when unit has 3 compressors on the system 1 BMP3 is replaced by a link across terminals 134 135 2 BMP3 is replaced by a link across termi...

Page 52: ...ORATOR HEATER INTERNAL 120 VAC WIRING TO F1 FUSE INTERNAL 120 VAC WIRING TYPICALLY FROM CONTROL TRANSFORMER INTERNAL NEUTRAL WIRING INTERNAL NEUTRAL WIRING INTERNAL NEUTRAL WIRING TYPICALLY FROM CONTROL TRANSFORMER INTERNAL WIRING TO HOT GAS SOLENOID VALVE SYSTEM 2 ALARM DRY CONTACTS OPEN ALARM SYSTEM 2 RUN DRY CONTACTS CLOSE RUN SYSTEM 1 RUN DRY CONTACTS CLOSE RUN EVAPORATOR PUMP DRY CONTACTS CLO...

Page 53: ...are given in Dimensions When the available space is less the unit s must be equipped with the discharge pressure transducer option to permit high pressure unloading in the event that air recirculation were to occur FOUNDATION The unit should be mounted on a flat and level foundation ground or roof capable of sup porting the entire operating weight of the equipment Operating weights are given in th...

Page 54: ...hillers CHILLED LIQUID PIPING The chilled liquid piping system should be laid out so that the circulating pump discharges into the evaporator The inlet and outlet evaporator liquid connections are given in Unit Dimensions on page 26 Hand stop valves are recommended for use in all lines to facilitate servicing Drain con nections should be provided at all low points to permit complete drainage of th...

Page 55: ...cts shall be Designed Tested Rated and Certified in accordance with and In stalled in compliance with applicable sections of the following Standards and Codes 1 AHRI 550 590 and 551 591 Water Chilling Packages Using the Vapor Compres sion Cycle 2 AHRI 370 Sound Rating of Large Outdoor Refrigerating and Air Conditioning Equipment 3 ANSI ASHRAE 15 Safety Code for Mechanical Refrigeration 4 ANSI ASHR...

Page 56: ...igned selected and constructed using a refrigerant with Flammability rating of 1 as defined by ANSI ASHRAE STANDARD 34 Number Des ignation and Safety Classification of Refrigerants Chiller shall include not less than two refrigerant circuits above 50 tons 200kW scroll compressors direct expansion type evaporator air cooled condenser refrigerant lubrication system interconnecting wiring safety and ...

Page 57: ...verse rotation phase loss and phase imbalance 2 03 REFRIGERANT CIRCUIT COMPONENTS Each refrigerant circuit shall include a discharge service ball type isolation valve high side pressure relief liquid line shutoff valve with charging port low side pressure relief device filter drier solenoid valve sight glass with moisture indicator thermostatic expan sion valves Option electronic expansion valves ...

Page 58: ... prevent crossflow during fan cycling Guards of heavy gauge PVC polyvinyl chloride coated or galvanized steel shall be factory installed 3 Fan Motors High efficiency direct drive 6 pole 3 phase insulation class F cur rent protected Totally Enclosed Air Over TEAO rigid mounted with double sealed permanently lubricated ball bearings 2 05 CONTROLS A General Automatic start stop operating and protecti...

Page 59: ...down manual reset required after the third trip in 90 minutes System Safeties in clude high discharge pressure low suction pressure high pressure switch and motor protector Compressor motor protector shall protect against damage due to high input current or thermal overload of windings 8 Unit Safeties Shall be automatic reset and cause compressors to shut down if low ambient low leaving chilled li...

Page 60: ...ex ternal fusing must be supplied by others in the incoming power wiring which must comply with the National Electric Code CE and or local codes 3 Single Point Circuit Breaker Single point Terminal Block with Circuit Breaker and lockable external handle in compliance with Article 440 14 of N E C can be sup plied to isolate power voltage for servicing Incoming power wiring must comply with the Nati...

Page 61: ...he mini mum step of unloading to as low as 5 capacity depending on both the unit operat ing conditions by introducing an artificial load on the evaporator Hot gas by pass is installed on only one refrigerant circuit K Thermal Storage leaving chilled liquid setpoint range for charge cycle from 25 F to 20 F minimum with automatic reset of the leaving brine temperature up to 40 F above the setpoint L...

Page 62: ...st and level chiller on support structure C Components installing contractor shall provide and install all auxiliary devices and ac cessories for fully operational chiller D Electrical co ordinate electrical requirements and connections for all power feeds with electrical contractor Division 16 E Controls co ordinate all control requirements and connections with controls contractor F Finish instal...

Page 63: ...hiller efficiency is measured in Coefficient of Performance COP kW ton kW input kW refrigeration effect kW ton and COP are related as follows kW ton 3 516 COP COP 3 516 kW ton MEASUREMENT MULTIPLY THIS ENGLISH VALUE BY TO OBTAIN THIS METRICVALUE CAPACITY TONS REFRIGERANT EFFECT ton 3 516 KILOWATTS kW POWER KILOWATTS kW NO CHANGE KILOWATTS kW HORSEPOWER hp 0 7457 KILOWATTS kW FLOW RATE GALLONS MINU...

Page 64: ...Printed on recycled paper Form 150 72 EG6 516 Supersedes 150 72 EG6 416 2016 Johnson Controls Inc P O Box 423 Milwaukee WI 53201 Printed in USA www johnsoncontrols com Issued on 05 25 2016 ...

Search results

Summary of Contents for YLAA

Reviews:

Related manuals for YLAA

Brands by name

Popular brands

York YLAA, Operation Manual

Search results

Summary of Contents for YLAA

Reviews:

Related manuals for YLAA

Brands by name

Popular brands