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172

YORK INTERNATIONAL

FORM 201.19-NM1 (204)

Micro Panel Contents

8.4 ELECTRONIC EXPANSION VALVE

ELECTRONIC EXPANSION VALVE

The Electronic Expansion Valve (EEV) is an electroni-
cally controlled expansion valve.  The control algo-
rithms to control the EEV reside in the micorprocessor 
software.  The superheat setpoint can be programmed 
on the control panel.

The purpose of the EEV is to meter a 

fl

 ow of liquid 

refrigerant into the evaporator to maintain a superheat 

FIG. 50  –

  ELECTRONIC EXPANSION VALVE

LD09132

120 VAC PILOT

SOLENOID

24 VAC HEAT

MOTOR

EXPANSION

VALVE

IN

OUT

setpoint.  The refrigerant 

fl

 ow direction is designated 

by an arrow on the expansion valve body.

There are two safeties associated with the EEV; Low 
Superheat Cutout and Sensor Failure Cutout.

Summary of Contents for YCAS0130

Page 1: ...E AIR COOLED SCREW LIQUID CHILLERS New Release Form 201 19 NM1 204 YCAS AIR COOLED LIQUID CHILLERS YCAS0130 THROUGH YCAS0230 STYLE G YCAS 2 SYSTEM EPROM 031 01798 001 STANDARD BRINE METRIC MODELS COMB...

Page 2: ...wal Parts RP manual and revision sheet for this equipment can also be found at this internet site It is the responsibility of installing operating service personnel to determine prior to working on th...

Page 3: ...aterials This individual shall also be familiar with and comply with all applicable governmental standards and regulations pertaining to the task in question SAFETY SYMBOLS The following symbols are u...

Page 4: ...CCESSORIES AND OPTIONS 23 Multiple Point Power Connection Standard 23 Single Point Power Connection with Individual Circuit Protection 23 Single Point Power Connection with Combined Circuit Protection...

Page 5: ...nterlocks 44 System Switches 44 Start up 44 Oil Pressure 44 Refrigerant Flow 44 Fan Rotation 44 Suction Superheat 44 Expansion Valve 44 Economizer Superheat 44 Subcooling 44 General Operation 44 SECTI...

Page 6: ...ault SAFETY status 140 2 7 Printout on Fault Shutdown 143 3 DISPLAY KEYS OPTION SWITCHES 144 3 1 General 144 3 2 Chilled Liquid Temps key 144 3 3 System Data Keys 145 3 4 Ambient Temp Key 145 3 5 Moto...

Page 7: ...TABLE 14 ISN Operational and Fault Codes 192 SECTION 9 MAINTENANCE GENERAL REQUIREMENTS 194 CONDENSER COILS 194 Chiller Compressor Operating Log 195 Scheduled Maintenance 195 ON BOARD BATTERY BACK UP...

Page 8: ...ESSURE CUTOUT 141 FIG 49 ENLARGED PHOTOGRAPH OF DIP SWITCHES ON MICROPROCESSOR BOARD 147 FIG 50 ELECTRONIC EXPANSION VALVE 172 FIG 51 CONDENSER FAN LAYOUT FOR DXST 2 COMPRESSOR UNITS 177 FIG 1 COMPONE...

Page 9: ...dence that the failure has occurred within the warranty period and that the unit has been operated within the designed parameters specified All warranty claims must specify the unit model serial numbe...

Page 10: ...than those specified in these instructions Any use of the equipment other than its intended use or operation of the equipment contrary to the relevant procedures may result in injury to the operator o...

Page 11: ...toxic non flammable and non corrosive and pose no special safety hazards Use of gloves and safety glasses are however recommended when working on the unit The build up of refrigerant vapor from a lea...

Page 12: ...t non metallic conduit General Description TheAir Cooled Screw Chiller utilizes many components which are the same or nearly the same as a standard reciprocating chiller of a similar size This include...

Page 13: ...rom the refrigerant using an external oil separator The pressurized oil from the oil separator is then cooled in the condenser coils and piped back to the compressor for lubrication The compressor des...

Page 14: ...e between the discharge pressure and the reduced pressure at the suc tion end of the rotors This lubricates the rotors as well as provides an oil seal against leakage around the rotors to assure refri...

Page 15: ...stored in lithium battery backed memory Motor Current Protection The microprocessor motor protection provides high current protection to assure that the motor is not damaged due to voltage excess ref...

Page 16: ...the low motor current and shuts the system down The micro will try two more starts before locking the system out The system locks out because the motor protector is a manual reset device After the fi...

Page 17: ...t The Operating Current is given by 0 65 X factory overload current setting An unloaded compressor condition occurs when any measured half line current is less than the Operating Current A current imb...

Page 18: ...5 0 1 1 1 1 1 1 0 17 295 4 99 0 1 1 0 0 0 1 1 0150 28 256 4 86 0 1 0 1 0 1 1 0 SYS 1 40 155 2 209 1 1 0 1 0 0 0 1 46 128 2 173 1 0 1 0 1 1 0 1 58 103 1 139 1 0 0 0 1 0 1 1 17 265 4 89 0 1 0 1 1 0 0 1...

Page 19: ...1 1 0 1 58 112 1 151 1 0 0 1 0 1 1 1 17 342 4 115 0 1 1 1 0 1 0 0 28 298 4 101 0 1 1 0 0 1 0 1 200 40 181 2 122 0 1 1 1 1 1 1 0 46 149 2 201 1 1 0 0 1 0 0 1 58 119 1 161 1 0 1 0 0 0 0 1 17 374 4 126 0...

Page 20: ...0 1 1 1 1 1 1 0 17 295 4 115 0 1 1 1 0 0 1 1 0150 28 256 4 100 0 1 1 0 0 1 0 0 SYS 1 40 155 2 209 1 1 0 1 0 0 0 1 46 128 2 173 1 0 1 0 1 1 0 1 58 103 2 139 1 0 0 0 1 0 1 1 17 265 4 104 0 1 1 0 1 0 0...

Page 21: ...1 0 0 0 0 1 1 0 28 298 4 117 0 1 1 1 0 1 0 1 200 40 181 2 142 1 0 0 0 1 1 1 0 46 149 2 201 1 1 0 0 1 0 0 1 58 119 2 161 1 0 1 0 0 0 0 1 17 374 4 146 1 0 0 1 0 0 1 0 210 28 325 4 127 0 1 1 1 1 1 1 1 SY...

Page 22: ...ition delay relay is enabled by the microprocessor from Relay Output Board 1 Terminal 8 SYS 1 or Relay Output Board 2 Terminal 6 SYS 2 The 1TR SYS 1 or 2TR SYS 2 contacts open de energizing 1S SYS 1 o...

Page 23: ...uminum fins cop per tubes and galvanized steel supports for generally adequate corrosion resistance However these materials are not adequate for all environments Entry Used to confirm Set Point change...

Page 24: ...itch 150 PSIG 10 bar DWP 20 F to 250 F 29 C to 121 C with 1 NPT IPS connection for upright mounting in horizontal pipe A flow switch must be field installed with each unit Optional 300 PSIG switch ava...

Page 25: ...ffset Special BAS Reset Offset Required English LCD Keypad Display std Spanish LCD Keypad Display French LCD Keypad Display German LCD Keypad Display Italian LCD Keypad Display Special LCD Keypad Disp...

Page 26: ...Sound Fans Low Sound Fans High Static Fans Special Sound Fans No Final Overspray Paint Required Final Overspray Paint Special Overspray Paint Required No Vibration Isolators 1 Vibration Isolators Seis...

Page 27: ...be steam cleaned It is recommended that the unit is periodically in spected during storage INSPECTION Remove any transit packing and inspect the unit to en sure that all components have been delivered...

Page 28: ...28 YORK INTERNATIONAL FORM 201 19 NM1 204 88 2250mm UNIT RIGGING CORRECT WRONG LD03514 FIG 3 UNIT RIGGING CORRECT WRONG LD03515 FIG 4 LIFTING LUGS CORRECT WRONG Handling and Storage...

Page 29: ...st be at least 4 3 4 120 mm wide at the contact points This will allow vibration isolators to be fitted if required Any ductwork or attenuators fitted to the unit must not have a total static pressure...

Page 30: ...r from the base rails DO NOT remove the four 3 8 bolts 3 mounting the corner brackets 2 to the frame rails 1 2 2 COMPRESSOR CHANNEL BASE BASE SUPPORT RAIL 3 3 LD09131 FIG 5 COMPRESSOR MOUNTING Where a...

Page 31: ...ust not be exceeded at any time Refer to the Technical Data Section for details The liquid must enter the evaporator at the inlet connection The inlet con nection for the evaporator is at the far end...

Page 32: ...der the insulation is recommended supplied inde pendently and controlled by an ambient temperature thermostat set to switch on at 37 F 21 C above the freezing temperature of the liquid The liquid circ...

Page 33: ...sure that the outlet of relief valves vent pipe remain clear of obstructions at all times DUCTWORK CONNECTION General Requirements The following ductwork recommendations are intended to ensure satisfa...

Page 34: ...install overcurrent protection devices between the supply conductors and the power supply terminals on the unit To ensure that no eddy currents are set up in the power panel the cables forming each 3...

Page 35: ...ee Section 8 1 15 Run Contact Terminals 29 and 30 Figs 13 and 14 pages 40 and 41 close to indicate that a system is running Alarm Contacts Each system has a voltage free change over contact which will...

Page 36: ...ATIONAL FORM 201 19 NM1 204 POWER PANEL LAYOUTS TYPICAL FIG 9 POWER PANEL SECTION 028972 G Installation WYE DELTA TYPICAL ACROSS THE LINE TYPICAL 028973 G OPTIONAL DISCONNECT SWITCH OPTIONAL CIRCUIT B...

Page 37: ...37 YORK INTERNATIONAL FORM 201 19 NM1 204 4 FIG 10 OPTION PANEL SECTION OPTION PANEL LAYOUT TYPICAL 00246VIP LOGIC PANEL OPTION PANEL WITH SINGLE POINT TERMINAL BLOCK OPTIONAL...

Page 38: ...TION FIG 11 LOGIC SECTION LAYOUT LOGIC SECTION LAYOUT 028975 G ITEM 1 2 3 4 5 6 7 8 DESCRIPTION Microprocessor Board Back of Display I O Expansion Board 1 Power Supply Board Relay Output Board 1 Relay...

Page 39: ...39 YORK INTERNATIONAL FORM 201 19 NM1 204 4 FIG 12 LOGIC SECTION LAYOUT WITH CONTROL PANEL LOGIC SECTION LAYOUT WITH CONTROL PANEL 028976 G...

Page 40: ...OINTS FOR EMERGENCY STOPS TERMINALS 13 34 028977 G Print Temperature PWM Current PWM Flow Switch System No 1 Run System No 2 Run 14 15 16 17 18 19 23 24 25 26 27 28 29 30 System No 1 Alarm Contacts Ch...

Page 41: ...4 FIG 14 CUSTOMER CONNECTIONS CUSTOMER CONNECTIONS 2028978 G CIRCUIT BREAKERS CB1 CB2 CB3 CUSTOMER CONNECTIONS FLOW SWITCH ALARM RUN ETC 115 VAC SUPPLY MICROPROCESSOR CIRCUIT BOARD RELAY BOARDS I O EX...

Page 42: ...xternal to the panel It is important to check that the correct primary tapping has been used With the supply voltage to the unit turned off remove the lid to the transformer box COMMISSIONING PREPARAT...

Page 43: ...itted in the customer s pipework on the evaporator outlet and wired into the control panel correctly using shielded cable There should be a straight run of at least 5 pipe diameters on either side of...

Page 44: ...a full charge of refrig erant is in the system the bubbles will disappear and be replaced by a solid column of liquid Fan Rotation As discharge pressure rises the condenser fans operate in stages to c...

Page 45: ...45 YORK INTERNATIONAL FORM 201 19 NM1 204 5 This page intentionally left blank...

Page 46: ...rations are fully automatic After an initial period at minimum capacity on the lead compressor the control system will adjust the unit load depending on the chilled liquid temperature and rate of temp...

Page 47: ...47 YORK INTERNATIONAL FORM 201 19 NM1 204 6 This page intentionally left blank...

Page 48: ...orator LD09230A LD04482A GLYCOL CORRECTION FACTORS Technical Data MODEL NUMBER YCAS EVAPORATOR 0130 0140 A 0150 0160 0170 0180 B 0200 0210 C 0230 D MODEL NUMBER YCAS EVAPORATOR 0130 0140 A 0150 0160 0...

Page 49: ...40 55 200 600 0 125 0160EC 40 55 200 600 0 125 0170EC 40 55 200 600 0 125 0180EC 40 55 200 600 0 125 0200EC 40 55 250 750 0 125 0210EC 40 55 250 750 0 125 0230EC 40 55 250 750 0 125 NOTES 1 For leavin...

Page 50: ...8 12 6 37 9 17 7 51 7 0180EC 4 4 12 8 12 6 37 9 17 7 51 7 0200EC 4 4 12 8 15 8 47 3 17 7 51 7 0210EC 4 4 12 8 15 8 47 3 17 7 51 7 0230EC 4 4 12 8 15 8 47 3 17 7 51 7 Excessive flow above the max GPM...

Page 51: ...kW 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 Fan Motor RPM 1140 1140 1140 1140 1140 1140 1140 1140 1140 Fan Diameter inches 35 4 35 4 35 4 35 4 35 4 35 4 35 4 35 4 35 4 Fan Tip Speed feet...

Page 52: ...12 512 512 512 512 512 512 512 CONDENSER FANS Number Ckt 1 Ckt 2 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 Standard Fans Fan Motor HP kW 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 2 1 8 Fan Motor Speed...

Page 53: ...E STATIC HIGH PRESS FANS OPTION 1 85 PRESSURE Pa HIGH PRESS FANS OPTION 2 150 LOW NOISE 4 PL 10 ELECTRICAL THREE PHASE 60 Hz V 200 230 380 460 575 440 OPERATING LIMITATIONS SI UNITS Maximum Ambient w...

Page 54: ...0 500 6 350 2 3 0 250 155 343 1093 4 4 8 23 0 460 176 200 225 300 1 0 300 4 300 6 350 128 280 893 4 4 0 19 0 575 141 150 175 225 2 4 0 4 300 6 350 103 224 714 4 3 1 15 2 200 402 400 500 600 2 2 0 500...

Page 55: ...0 103 224 714 4 3 1 15 2 200 404 400 500 600 2 2 0 500 2 3 0 250 3 2 0 400 295 708 N A 4 8 2 38 0 230 350 400 450 600 2 1 0 300 2 3 0 250 3 2 0 400 256 642 N A 4 7 8 33 0 0170EC 380 212 200 300 350 1...

Page 56: ...0 450 2 1 0 300 2 3 0 250 460 293 0 400 350 400 2 1 0 300 2 3 0 250 575 233 6 250 300 300 2 0 500 6 350 200 698 9 800 800 800 3 2 0 500 3 2 0 400 230 612 4 800 700 800 3 2 0 500 3 2 0 400 0150EC 380 3...

Page 57: ...280 893 4 4 0 19 0 575 103 0 224 714 4 3 1 15 2 103 0 224 714 4 3 1 15 2 200 321 0 708 2256 4 8 2 38 0 295 0 708 2256 4 8 2 38 0 230 279 0 642 2045 4 7 8 33 0 256 0 642 2045 4 7 8 33 0 0170EC 380 169...

Page 58: ...l Data CHILLER FIELD SUPPLIED WIRING MODEL VOLTS FIELD PROVIDED POWER SUPPLY FACTORY PROVIDED LUGS WIRE RANGE 7 YCAS MIN NF OVER CURRENT PROTECTION13 STANDARD OPTIONAL NF MCA1 DISC SW2 9 MIN 3 5 MAX 4...

Page 59: ...0 19 0 115 719 4 4 0 19 0 575 103 714 4 3 1 15 2 92 574 4 3 1 15 2 0160EC 460 128 893 4 4 0 19 0 128 893 4 4 0 19 0 575 103 714 4 3 1 15 2 103 714 4 3 1 15 2 0170EC 460 140 893 4 4 0 19 0 128 893 4 4...

Page 60: ...AKER COMPRESSOR FANS11 12 COMPRESSOR FANS11 12 YCAS RATING2 WIRE RANGE7 LUGS RLA X LRA QTY FLA ea LRA ea RLA X LRA QTY FLA ea LRA ea 0130EC 460 273 400 2 3 0 250 107 719 4 4 0 19 0 107 719 4 4 0 19 0...

Page 61: ...TAGE CODE DXS45LA MOTOR CODE A DXS36LA MOTOR CODE A DXS24LA MOTOR CODE TBD B5N B5E B6N B6E A5N A5E A6N A6E C5N C5E C6N C6E VOLTAGE CODE 17 28 40 46 50 58 17 28 40 46 50 58 17 28 40 46 50 56 MAX kW 150...

Page 62: ...rements using N E C wire sizing information The above recommendations are based on the National Electric Code and using copper conductors only Field wiring must also comply with local codes 8 A ground...

Page 63: ...63 YORK INTERNATIONAL FORM 201 19 NM1 204 This page intentionally left blank 7...

Page 64: ...ations Also refer to cautions on page 67 5 To stop unit Emergency Stop with contacts other than those shown install the stop contact between 5 and 1 If a stop device is not installed a jumper must be...

Page 65: ...65 YORK INTERNATIONAL FORM 201 19 NM1 204 LD09233 WIRING DIAGRAM ACROSS THE LINE START FIG 18 WIRING DIAGRAM ACROSS THE LINE START 7...

Page 66: ...66 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data ELEMENTARY DIAGRAM FIG 19 ELEMENTARY DIAGRAM ACROSS THE LINE START 3 4 6 5 LD09234...

Page 67: ...contactor coil Any contacts connected to flow switch inputs or BAS inputs on terminals 13 19 or TB3 or any other terminals must be sup pressed with a YORK P N 031 00808 000 suppressor across the rela...

Page 68: ...n install a cycling device in series with the flow switch FSLW See Note 3 for contact rating and wiring specifications Also refer to cautions on page 71 5 To stop unit Emergency Stop with contacts oth...

Page 69: ...69 YORK INTERNATIONAL FORM 201 19 NM1 204 WIRING DIAGRAM WYE DELTA START FIG 21 ELEMENTARY DIAGRAM WYE DELTA START 7 LD09236...

Page 70: ...70 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data ELEMENTARY DIAGRAM FIG 22 ELEMENTARY DIAGRAM WYE DELTA START 3 4 6 5 LD09234...

Page 71: ...ontactor coil Any contacts connected to flow switch inputs or BAS inputs on terminals 13 19 or TB3 or any other terminals must be sup pressed with a YORK P N 031 00808 000 suppressor across the relay...

Page 72: ...72 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data FIG 22A POWER PANEL SYSTEM 1 COMPONENT LOCATIONS LD09238...

Page 73: ...73 YORK INTERNATIONAL FORM 201 19 NM1 204 LD09239 FIG 22B CONTROL PANEL COMPONENT LOCATION 7...

Page 74: ...74 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data FIG 22C POWER PANEL SYSTEM 2 COMPONENT LOCATIONS LD09240...

Page 75: ...75 YORK INTERNATIONAL FORM 201 19 NM1 204 7 LEGEND LD09241...

Page 76: ...76 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data LD03282 LD03283 2 ACE MOTOR PROTECTOR MODULE LD03284...

Page 77: ...77 YORK INTERNATIONAL FORM 201 19 NM1 204 7 CONNECTION DIAGRAM SYSTEM WIRING LD09242...

Page 78: ...78 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data COMPRESSOR TERMINAL BOX LD09243...

Page 79: ...79 YORK INTERNATIONAL FORM 201 19 NM1 204 7 LD09373 ELEMENTARY DIAGRAM CONTROL CIRCUIT...

Page 80: ...80 YORK INTERNATIONAL FORM 201 19 NM1 204 Technical Data 3 4 5 6 3 4 5 6 7 8 5 6 3 4 7 8 9 10 LD06840 ELEMENTARY DIAGRAM...

Page 81: ...81 YORK INTERNATIONAL FORM 201 19 NM1 204 7 This page intentionally left blank...

Page 82: ...redictable air flow patterns and possible diminished performance YORK s unit controls will optimize operation without nuisance high pressure safety cutout however the system designer must consider pot...

Page 83: ...743 CENTER OF GRAVITY Copper YCAS X Y Z 0130 103 5 44 4 40 7 0140 103 5 44 4 40 7 0150 108 2 43 0 39 2 0160 108 4 43 1 39 1 0170 108 4 43 1 39 1 0180 108 4 43 1 39 1 CENTER OF GRAVITY Alum YCAS X Y Z...

Page 84: ...resulting in unpredictable air flow patterns and possible diminished performance YORK s unit controls will optimize operation without nuisance high pressure safety cutout however the system designer...

Page 85: ...1 0140 2573 0 1127 8 960 1 0150 2710 2 1087 1 919 5 0160 2717 8 1092 2 919 5 0170 2717 8 1092 2 919 5 0180 2717 8 1092 2 919 5 CENTER OF GRAVITY Copper YCAS X Y Z 0130 2628 9 1127 8 1033 8 0140 2628...

Page 86: ...without nuisance high pressure safety cutout however the system designer must consider potential performance degradation Access to the unit control center assumes the unit is no higher than on spring...

Page 87: ...NSIONS YCAS0200 YCAS0230 ENGLISH 7 LD03750 CENTER OF GRAVITY Alum YCAS X Y Z 0200 119 4 43 2 38 0 0210 119 4 43 2 38 0 0230 119 4 43 2 38 0 CENTER OF GRAVITY Copper YCAS X Y Z 0200 122 3 43 3 41 0 021...

Page 88: ...e diminished performance YORK s unit controls will optimize operation without nuisance high pressure safety cutout however the system designer must consider potential performance degradation Access to...

Page 89: ...0200 YCAS0230 SI 7 LD03753 LD03752 CENTER OF GRAVITY Copper YCAS X Y Z 0200 3106 4 1099 8 1041 4 0210 3106 4 1099 8 1041 4 0230 3106 4 1099 8 1041 4 CENTER OF GRAVITY Alum YCAS X Y Z 0200 3032 8 1097...

Page 90: ...204 1 3 m 2 m 2 m 2 m TECHNICAL DATA CLEARANCES NOTES 1 No obstructions allowed above the unit 2 Only one adjacent wall may be higher than the unit 3 Adjacent units should be 10 feet 3 meters apart LD...

Page 91: ...12 919 0180 1 907 1 693 1 479 1 265 1 994 1 770 1 546 1 323 12 978 0200 2 188 1 881 1 573 1 265 2 247 1 931 1 615 1 299 13 998 0210 2 204 1 896 1 587 1 279 2 270 1 952 1 635 1 318 14 141 0230 2 206 1...

Page 92: ...CP 2 31 2 200 997 9 0 83 21 0 Gray CP 2 32 2 600 1 179 3 0 74 18 7 White CP 2 35 3 000 1 360 8 0 70 17 7 Gold FIG 28 CP 2 XX ISOLATOR DETAILS LD01089 ALUMINUM FINS 1 ISOLATOR SELECTIONS VMC TYPE CP 2...

Page 93: ...53 1 551 1 532 1 530 0150 1 552 1 552 1 532 1 531 1 553 1 552 1 551 1 532 0160 1 552 1 552 1 532 1 531 1 553 1 552 1 551 1 532 0170 1 553 1 552 1 532 1 531 1 553 1 552 1 551 1 532 0180 1 553 1 552 1 5...

Page 94: ...499 4 R 4 BLACK 1 500 681 0 0 25 0 50 OR RED 2 250 1 021 5 6 3 12 7 RD 4 GREEN 3 000 1 362 0 GRAY 4 000 1 816 0 TYPE L W H HD A B C D E R 3 5 1 2 3 3 8 1 3 4 2 7 8 2 1 2 1 2 4 1 8 9 16 1 4 OR 139 7 85...

Page 95: ...52 1 468 2 103 1 911 1 720 1 529 14 238 0200 2 319 2 051 1 784 1 516 2 374 2 100 1 826 1 552 15 522 0210 2 334 2 066 1 798 1 530 2 397 2 122 1 847 1 571 15 665 0230 2 336 2 067 1 798 1 528 2 408 2 130...

Page 96: ...7 White CP 2 35 3 000 1360 8 0 70 17 7 Gold ISOLATOR DETAILS LD01089 60 HERTZ COPPER FINS 1 ISOLATOR SELECTIONS VMC TYPE CP SEE TABLE BELOW YCAS A B C D E F G H I J K L M N O P 0130 2 31 2 28 2 28 2...

Page 97: ...AWMR 1 553 2 200 997 9 2 51 AWMR 2 520 1 300 589 7 2 51 AWMR 2 521 1 552 704 0 2 51 AWMR 2 53 2 000 907 2 2 51 AWMR 1 530 2 300 1 043 3 2 51 AWMR 2 531 2 552 1 157 6 2 51 AWMR 2 532 3 000 1 360 8 2 5...

Page 98: ...OPRENE MOUNTINGS TYPE RD 3 LD04033 29518A 29517A TYPE L W H HD A B C D E R 3 5 1 2 3 3 8 1 3 4 2 7 8 2 1 2 1 2 4 1 8 9 16 1 4 OR 139 7 85 8 44 4 73 2 63 5 12 7 104 8 14 4 6 3 RD 3 R 4 6 1 4 4 5 8 1 5...

Page 99: ...9 1 836 1 652 1 468 2 103 1 911 1 720 1 529 14 238 0200 2 319 2 051 1 784 1 516 2 374 2 100 1 826 1 552 15 522 0210 2 334 2 066 1 798 1 530 2 397 2 122 1 847 1 571 15 665 0230 2 336 2 067 1 798 1 528...

Page 100: ...ite CP 2 35 3 000 1360 8 0 70 17 7 Gold FIG 32 CP 2 XX ISOLATOR DETAILS LD01089 60 HERTZ ALUMINUM FINS 1 ISOLATOR SELECTIONS VMC TYPE CP SEE TABLE BELOW YCAS A B C D E F G H I J K L M N O P 0130 2 31...

Page 101: ...R 1 552 1 900 861 8 2 51 AWMR 1 553 2 200 997 9 2 51 AWMR 2 520 1 300 589 7 2 51 AWMR 2 521 1 552 704 0 2 51 AWMR 2 53 2 000 907 2 2 51 AWMR 1 530 2 300 1043 3 2 51 AWMR 2 531 2 552 1157 6 2 51 AWMR 2...

Page 102: ...RENE MOUNTINGS TYPE RD 3 LD04033 29518A 29517A TYPE L W H HD A B C D E R 3 5 1 2 3 3 8 1 3 4 2 7 8 2 1 2 1 2 4 1 8 9 16 1 4 OR 139 7 85 8 44 4 73 2 63 5 12 7 104 8 14 4 6 3 RD 3 R 4 6 1 4 4 5 8 1 5 8...

Page 103: ...1 869 1 759 2 167 2 053 1 939 1 824 15 678 0200 2 406 2 225 2 044 1 864 2 458 2 273 2 088 1 904 17 262 0210 2 422 2 240 2 059 1 877 2 481 2 295 2 109 1 923 17 405 0230 2 424 2 241 2 059 1 876 2 491 2...

Page 104: ...8 7 White CP 2 35 3 000 1360 8 0 70 17 7 Gold ISOLATOR DETAILS LD01089 60 HERTZ COPPER FINS WITH SILENCER KIT 1 ISOLATOR SELECTIONS VMC TYPE CP SEE TABLE BELOW YCAS A B C D E F G H I J K L M N O P 013...

Page 105: ...R 2 520 1 300 589 7 2 51 AWMR 2 521 1 552 704 0 2 51 AWMR 2 53 2 000 907 2 2 51 AWMR 1 530 2 300 1043 3 2 51 AWMR 2 531 2 552 1157 6 2 51 AWMR 2 532 3 000 1360 8 2 51 60 HERTZ CU FINS SEISMIC ISOLATOR...

Page 106: ...E RD 4 NEOPRENE MOUNTINGS TYPE RD 3 LD04033 29518A 29517A TYPE L W H HD A B C D E R 3 5 1 2 3 3 8 1 3 4 2 7 8 2 1 2 1 2 4 1 8 9 16 1 4 OR 139 7 85 8 44 4 73 2 63 5 12 7 104 8 14 4 6 3 RD 3 R 4 6 1 4 4...

Page 107: ...e height of the isolator To use the isolator as blocking for the equipment insert a 1 4 shim between the upper load plate and vertical uprights Lower the equipment on the blocking or shimmed isolators...

Page 108: ...all percentage of the of the liquid passes through an expansion valve into the other side of the economizer where it is evaporated This low pressure liquid subcools the major part of the refrigerant M...

Page 109: ...LVE THERMOSTATIC SOLENOID VALVE BALL VALVE RELIEF VALVE STOP VALVE ANGLE ACCESS PURGE VALVE PLUG PRESSURE SENSOR TEMPERATURE SENSOR REPLACEABLE CORE FILTER DRYER SIGHT GLASS FLOW SWITCH option PRESSUR...

Page 110: ...ATURE BOP OIL PRESSURE BOT OIL TEMPERATURE BSP SUCTION PRESSURE CCCV COMPRESSOR CAPACITY CONTROL VALVE ECH CRANK CASE HEATER EEH EVAPORATOR HEATER SHPI HIGH PRESSURE CUT OUT STS SUCTION TEMPERATURE SE...

Page 111: ...HEATER ECONOMIZER GAS IN DISCHARGE CASE OIL INLET FROM CONDENSER COOLING COIL DISCHARGE GAS OUT OIL FILTER BLEED EVACUATION POINT OIL FILTER COVER PLATE CAPACITY CONTROL SOLENOID CAPACITY CONTROL 3 W...

Page 112: ...112 YORK INTERNATIONAL FORM 201 19 NM1 204 COMPRESSOR COMPONENTS CONT D FIG 40 COMPRESSOR COMPONENTS LD03669 Technical Data...

Page 113: ...113 YORK INTERNATIONAL FORM 201 19 NM1 204 COMPRESSOR COMPONENTS CONT D FIG 41 COMPRESSOR COMPONENTS LD03670 7...

Page 114: ...114 YORK INTERNATIONAL FORM 201 19 NM1 204 COMPRESSOR COMPONENTS CONT D FIG 42 COMPRESSOR COMPONENTS Technical Data LD06079 MALE ROTOR RELIEF VALVE DISCHARGE CHECK VALVE OIL FILTER OIL FILTER O RING...

Page 115: ...RUST BEARING 22 BEARING CLAMP NUT 23 BEARING SPACER SLEEVE 24 BEARING PRELOAD SPRING 25 O RING 26 BEARING BORE PLUG 27 DISCHARGE COVER 28 BEARING BORE PLUG 29 BEARING PRELOAD SPRING 30 BEARING SPACER...

Page 116: ...204 COMPRESSOR COMPONENTS CONT D FIG 44 COMPRESSOR COMPONENTS O RING MOTOR ROTOR MALE ROTOR LOCKING KEY MALE ROTOR FEMALE ROTOR O RING RELIEF VALVE ECONOMIZER PLUG SUPPORT RINGS LD03672 SLIDE VALVE RE...

Page 117: ..._________________________ LOCATION _______________________________ SOLD BY ________________________________ INSTALLING CONTRACTOR ___________________________ START UP TECHNICIAN COMPANY ______________...

Page 118: ...R407C Chiller Type ________________________ Unit Type _______________________________ 16 Assure that the Flow Switch is properly in stalled wired correctly and working 17 Assure bolts through compres...

Page 119: ...ure and subcooling below SYS 1 SYS 2 Liq Line Press PSIG kPa Temp F C Liq Line Temp F C Subcooling F C Heat Recovery ___________________________ Sys 1 100 FLA ____________________ Amps Sys 2 100 FLA _...

Page 120: ...tion and motor cooling Correct superheat setting is approx 10 12 F 6 7 C The superheat is calculated as the difference between the pressure at the Economizer Service Valve on the compressor converted...

Page 121: ...121 YORK INTERNATIONAL FORM 201 19 NM1 204 7 This page intentionally left blank...

Page 122: ...om recent safety shutdowns ON OFF ROCKER SWITCH This switch shuts down the entire chiller when placed in the OFF position The switch must be ON for the chiller to operate The systems will not pump dow...

Page 123: ...l refrigerant systems are provided on the Mi croprocessor Board External interface is available for control of the chiller via a YORK ISN System or YORK Remote Control Center In addition EMS BAS Syste...

Page 124: ...iod regardless of the time involved The battery is a 10 year lithium type but life will depend upon whether the Real Time Clock s internal clock circuit is energized With the clock OFF a rated life of...

Page 125: ...wer only High voltage cir cuitry will still be energized from the high voltage supply REMOVING 115VAC power to CB3 or opening CB3 removes power from the evaporator heaters This could cause evaporator...

Page 126: ...path from the Relay Output Board to the motor contactor is broken by the Motor Protection Module contacts it will lock the system out after 3 faults The Motor Protection Module must then be reset by...

Page 127: ...HA _ _ _ WHEN IDLE AND FLASHING CIRCLE WHEN SYSTEM IS RUNNING ON NUMERICAL VALUES 29121A TOP VIEW TOP VIEW 29121A INTEGRAL C T S 3 SWITCH PUSHED TO LEFT INDICATES ON SWITCHES PLACED IN THE ON POSITION...

Page 128: ...input is used for purposes of demand limit and operates as follows Closing the input contact for a defined period of time allows reset of the Current Limit downward Contact closure of 1 11 seconds wil...

Page 129: ...eset Temp 4 sec 1 sec X 40 F 10 sec Reset Temp 120 Fsec 10 sec 12 F 6 C To determine the new setpoint add the reset to the setpoint programmed into memory In the example above if the programmed setpoi...

Page 130: ...sable Jump Contact Real Time Clock and Battery Backup I C Microprocessor I C label shows version NOTE Dimple is positioned at top edge 3A Dip Switch Set 8 switches System Switches S2 System 1 S3 Syste...

Page 131: ...GIC SECTION LAYOUT 028980 G 1 2 5 6 4 3 7 8 60 HZ MODEL LOGIC SECTION ITEM 1 2 3 4 5 6 7 8 DESCRIPTION Microprocessor Board Back of Keypad I O Expansion Board 1 Power Supply Board Relay Output Board 1...

Page 132: ...after power re application or 30 seconds have elapsed between a Daily Schedule shutdown and restart If the Daily Schedule is not used On Off times equal 00 00 the contacts will be closed at all times...

Page 133: ...s applied in an application used for critical duty such as process duty or cooling other crit ical equipment and the alarm circuit should fail to function YORK will not be liable for damages 1 20 RUN...

Page 134: ...itional 20 F to 25 F 11 1 C to 13 8 C often making the total subcooling at the TXV over 40 F 4 4 C This should not be confused with subcooling at the liquid valve which should generally be 12 Fto 15 F...

Page 135: ...135 YORK INTERNATIONAL FORM 201 19 NM1 204 PROCESS AND INSTRUMENTATION DIAGRAM FIG 47A PROCESS AND INSTRUMENTATION DIAGRAM LD03486 8 ECONOMIZER HX...

Page 136: ...hese messages are described in detail below with ex amples of each display In each example is used as applicable to represent the system number where mes sages apply to individual systems 2 2 GENERAL...

Page 137: ...rature is below the point where the microprocessor will bring the lead system on and or that the loading sequence has not loaded the chiller far enough to bring the lag system on The lag system will d...

Page 138: ...charge pressure nears the point at which the high pressure cutout would shut the system down When the above message appears discharge pressure has exceeded the programmable threshold and the compresso...

Page 139: ...START ON POWER FAILURE is enabled Otherwise the chiller must be manually reset See Section 8 2 page 170 2 5 UNIT FAULT STATUS MESSAGES A Unit Fault will shut the entire chiller down when a preset saf...

Page 140: ...nitored to check that flow is present in the evaporator when a compressor is running Any external cycling devices fitted by the customer are connected in series with the flow switch YCAS 2 System chil...

Page 141: ...not be picked up by the High Oil Differential Safety since no flow will cause the dif ferential through the oil piping to drop to zero During normal operation differential oil pressure must be greater...

Page 142: ...when the pilot solenoid is closed 10 times in 2 minutes due to low superheat S Y S H I G H M T R C U R R S Y S H I G H M T R C U R R The High Motor Current Safety protects against exces sively high m...

Page 143: ...after 4 seconds of compressor operation From this time the system will be shut down if average motor current is less than 10 of FLA Compressor Motor Protection Modules and Me chanical High Pressure Cu...

Page 144: ...required data about the operation of the chiller This is particularly useful during commissioning mon itoring the operation of the chiller diagnosing potential future problems and service troubleshoot...

Page 145: ...E M P 2 8 2 F S Y S O I L 1 7 6 P S I G S P 6 4 D P 1 9 5 P S I G S Y S O I L 1 5 7 4 F S T 3 1 0 D T 1 2 3 2 F S S A T S U C T 3 2 9 F S U C T S H E A T 1 5 0 F SlidevalvepositionisAPPROXIMATE and sh...

Page 146: ...to programstheLowAmbient Cutout setting at 25 F 4 C and is not adjustable S 1 2 A M B I E N T C O N T R O L S T A N D A R D 3 5 MOTOR CURRENT KEY Pressing the Motor Current key displays compressor cur...

Page 147: ...TION Incorrect programming may cause damage to the chiller Closed Place the switch in the CLOSED position selects the type of chiller as an air cooled chiller YCAS The switch MUST always be in the CLO...

Page 148: ...le gives a summary of Modes dis played messages which can be selected using the Open and Closed positions for each of the eight SW1 Dip Switches SWITCH SWITCH OPEN SETTING SWITCH CLOSED SETTING 1 Wate...

Page 149: ...r locally on the panel display or if an optional printer is connected remotely as hard copy printouts The Operating Data Oper Data key provides a real time list of system operating data and programmed...

Page 150: ...or water pump and the status of the evaporator heater For the evaporator pump contacts ON contacts closed OFF contacts open The Evaporator Heater status is controlled on ambient temperature as follows...

Page 151: ...d by pressing the Operating Data key with an optional printer attached In this case an example is shown for a YCAS 2 System Chiller YORK INTERNATIONAL CORPORATION MILLENNIUM SCREW CHILLER UNIT STATUS...

Page 152: ...is stored by the microprocessor The information is stored at the instant of the fault regardless of whether the fault caused a lockout to occur This information is not affected by power failures or ma...

Page 153: ...9 5 0 P S I G D I S C H A R G E P R E S S U R E U N L O A D 3 7 5 0 P S I G S U C T I O N P R E S S U R E C U T O U T 4 4 0 P S I G S Y S 1 N O F A U L T S S Y S 2 H I G H M T R C U R R S 1 4 Y C A S...

Page 154: ...A N G E 2 0 F This message indicates the status of both the evaporator pump signal from the microprocessor and the evapo rator heater This message indicates that a remote device such as a Remote Contr...

Page 155: ...S I G S P 6 2 D P 2 7 1 P S I G S S A T S U C T 3 4 7 F S U C T S H E A T 1 0 5 F S S A T D S C H 1 2 9 F D S C H S H E A T 6 2 8 F S Y S S V S T E P 4 0 S Y S C O O L E R I N L E T R E F R I G T E M...

Page 156: ...ID ON CONDENSER FAN STAGE 3 COMPRESSOR HEATER OFF WYE DELTA RELAY ON DAILY SCHEDULE S M T W T F S HOLIDAY MON START 00 00AM STOP 00 00AM TUE START 00 00AM STOP 00 00AM WED START 00 00AM STOP 00 00AM T...

Page 157: ...e returned The Enter key is also used to scroll through available data when using the Program or Set Schedule Holiday keys 5 4 CANCEL KEY When the Cancel key is pressed the cursor will always return t...

Page 158: ...ller cooling capacity to maintain this temperature within a programmed range The capacity is controlled by switching compressors on or off and by varying a load unload voltage to each compressor slide...

Page 159: ...or is fully loaded A compressor may also be fully unloaded at step 35 and below Keep this potential indicator error in mind when attempting to determine slide valve position versus actual compressor c...

Page 160: ...fault on a Low Water Tem perature cut out under the following conditions a if chilled liquid tem perature falls below the low end of the Control Range CR for more than 37 seconds b if chilled liquid t...

Page 161: ...s to 0 100 1 102 2 104 3 106 4 108 5 115 10 In the case of Saturated suction temperature the unload ing is based on saturated suction temperature dropping below the internally programmed unload thresh...

Page 162: ...period of time and allows reset of the setpoint upward by up to 40 F 22 C above the setpoint pro grammed in memory see Section 1 7 The maximum allowable reset must be programmed into memory and can b...

Page 163: ...isplay mode in which the cursor will disappear and the live clock will be displayed 7 CLOCK KEYS O U T O F R A N G E T R Y A G A I N 7 1 GENERAL The microprocessor features a continuously running in t...

Page 164: ...are scrolled through by re petitively pressing the set Schedule Holiday key To re program any of the daily schedules key in the new Start time then if necessary change the associated AM PM by pressin...

Page 165: ...is in an OFF period This key avoids the need to reprogram the Daily Schedule Once activated Manual Override is only active for a period of 30 minutes and the following status message will be observed...

Page 166: ...hillers such as YCAS chillers D I S C H A R G E P R E S S U R E C U T O U T 3 9 5 0 P S I G 8 PROGRAM KEY 8 1 GENERAL The Program key is used to program system operating parameters including cutout po...

Page 167: ...tion pressure is monitored as long as the compressor runs For the first 270 seconds of run ning suction pressure can be lower than the programmed cutout but must be greater than This cutout value incr...

Page 168: ...he saturated refrigerant pressure equivalent to 18 F 10 C below the lowest temperature of the pro grammed chilled liquid Control Range Section 6 To program the Suction Pressure Cutout key in the re qu...

Page 169: ...ion the unloading control is disabled After this time if motor current exceeds the programmed limit the SYS X CURR LIMITING message will appear on the display and a 1 second unload pulse will be sent...

Page 170: ...will allow operation of the chiller under most operating conditions This allows quick start up programming for typical chilled water applications To program the default values into memory first press...

Page 171: ...rature Cutout Standard 25 0 F Ambient 3 9 Low 0 F 50 0 F 25 0 F Ambient 17 8 C 10 0 C 3 9 C Leaving Chilled Liquid Temp Cutout Water Cooling 36 0 2 2 Glycol Cooling 8 0 F 36 0 F 36 0 F 13 3 C 2 2 C 2...

Page 172: ...or software The superheat setpoint can be programmed on the control panel The purpose of the EEV is to meter a flow of liquid refrigerant into the evaporator to maintain a superheat FIG 50 ELECTRONIC...

Page 173: ...that the 24VAC heat motor power signal is energized MOP FEATURE The controller also has an MOPfeature Maximum Op erating Pressure that overrides superheat control when the MOP setpoint is exceeded Th...

Page 174: ...This safety will lock out a system the first time and will not allow automatic restart ing Following are the messages for all systems OPERATING DATA DISPLAYS The following display relating to EEVoper...

Page 175: ...EV output will be set to 0 When the expansion valve type is set to electronic by closing DIP switch 7 the EEV controller low superheat safety device low superheat safety and the sensor failure safety...

Page 176: ...out it is possible that the EEV has failed If the small charge in the bulb leaks the valve will not be able to open and the entire EEV must be replaced The system shuts down on Low Superheat Verify th...

Page 177: ...e DP When the DPrises above 230 PSIG fan stage 1 is activated From here subsequent fan stages are activated as the DP rises in increments of 10 20 PSIG The system will remain at the highest fan stage...

Page 178: ...Sys 2 Outputs are on Relay Output Board 2 TABLE 4 CONDENSER FAN CONTROL AND FAN CONTACTOR DATA FOR DXST UNITS WITH 5 FANS SYSTEM Sys 1 Outputs are on Relay Board 1 At ambients above 85 F Stages 3 4 a...

Page 179: ...r Drop in Unit Type YCAS or YCWS Heat Recovery Unit Enabled or Disabled Sys 1 100 Full Load Amps 75 to 500 Amps Sys 2 100 Full Load Amps 75 to 500 Amps Sys 1 Motor Protector Input 1 0 to 5 0 volts Sys...

Page 180: ...295 4 319 2 2 28 256 4 276 1 91 40 155 2 167 4 64 46 128 2 138 3 84 58 103 1 111 3 09 150 SYS 2 17 265 4 286 1 97 28 230 2 248 3 44 40 139 2 150 4 18 46 115 1 124 3 44 58 92 1 99 2 75 160 17 295 4 31...

Page 181: ...369 2 55 28 298 4 322 2 24 40 181 2 195 2 71 46 149 2 161 4 46 58 119 1 129 3 58 210 SYS 1 17 374 4 404 2 8 28 325 4 351 2 44 40 197 2 213 2 95 46 163 2 176 2 44 58 130 2 140 3 89 210 SYS 2 17 342 4...

Page 182: ...319 2 56 28 256 4 276 2 22 40 155 2 167 4 64 46 128 2 138 3 84 58 103 2 111 3 09 150 SYS 2 17 265 4 286 2 31 28 230 4 248 2 00 40 139 2 150 4 18 46 115 2 124 3 44 58 92 2 99 2 75 160 17 295 4 319 2 5...

Page 183: ...2 98 28 298 4 322 2 60 40 181 2 195 3 15 46 149 2 161 4 47 58 119 2 129 3 58 210 SYS 1 17 374 4 403 3 24 28 325 4 351 2 82 40 197 2 213 3 42 46 163 2 176 2 84 58 130 2 140 3 89 210 SYS 2 17 342 4 369...

Page 184: ...mple is shown below SERVICE MODE OUTPUT ENABLE The Service Mode allows the user to enable and disable the outputs except compressor To enter the Service Mode turn the UNIT switch off and press PROGRAM...

Page 185: ...1 80 28 2 2 1 93 32 0 0 2 05 36 2 2 2 17 39 3 9 2 30 43 6 1 2 42 46 7 8 2 54 50 10 2 66 68 20 3 22 86 30 3 69 104 40 4 05 TEST POINT Test Point Microboard J11 9 3 8 10 SENSOR CALIBRATION CHARTS Press...

Page 186: ...oboard Relay Board 1 J9 3 TB1 8 Sys 1 Wye Delta Relay Microboard Relay Board 1 J9 4 TB1 7 SPARE Microboard Relay Board 1 J9 5 TB1 6 5 Evaporator Heater Microboard Relay Board 1 J9 6 TB1 4 3 Sys 1 Alar...

Page 187: ...8 Sys 1 Discharge Pressure Transducer Microboard J16 4 Sys 2 Suction Temp Sensor Microboard J16 6 Sys 1 Suction Temp Sensor Microboard J17 9 Input from I O Expansion Board Microboard J17 10 SPARE Micr...

Page 188: ...t output board they are on TABLE 11 ANALOG OUTPUTS Microboard J4 1 Unit Switch Microboard J4 2 PWM Current Limit Microboard J4 3 SPARE Flow Switch Euro CAT only Microboard J4 4 PWM Temp Reset Microboa...

Page 189: ...ero will be sent Tables 13 and 14 show the data values and page listings for this unit 8 12 ISN CONTROL TABLE 12 ISN RECEIVED DATA ISN CONTROL DATA PAGE P03 SETPOINT P04 ISN Current Limit P05 P06 P07...

Page 190: ...URO CAT Sys 1 Heat Recovery Solenoid Status Heat Recovery P44 116 D Sys 1 Wye Delta P45 117 D Sys 2 Spare Sys 2 Discharge Cooling Solenoid Status Euro CAT Low Temp P46 118 D Sys 2 Liquid Line Solenoid...

Page 191: ...58 161 A High Discharge Pressure Cutout P72 162 165 A Remote Leaving Chilled Liquid Setpoint P73 166 169 A Sys 1 Suction Superheat P74 170 173 A Cooling Range P75 174 177 A Sys 1 Discharge Superheat P...

Page 192: ...ning 11 Anti Recycle Timer Active 11 High Oil Temperature 12 Manual Override 12 High Discharge Temperature 13 Suction Limiting 13 Improper Phase Rotation 14 Discharge Limiting 14 Low Motor Current MP...

Page 193: ...193 YORK INTERNATIONAL FORM 201 19 NM1 204 8 This page intentionally left blank...

Page 194: ...ifications or ancillary equipment as applicable The Safety Section of this manual should be read carefully before at tempting any maintenance operations on the unit Daily Weekly Maintenance The follow...

Page 195: ...ry between each minor and major service can vary depending on for instance application site conditions and expected operating schedule Normally a minor service should be carried out every three to six...

Page 196: ...re Suction Temperature Suction Superheat Discharge Pressure Actual Discharge Temperature Oil Pressure Oil Temperature FLA Motor Oil Level example Oil Added gallons or liters Inlet Temperature Outlet T...

Page 197: ...1 X Check compressor and evaporator heaters for operation X Sample compressor oil and replace oil if necessary 1 X Leak check the chiller 1 X Disconnect power source and lock out Check tightness of p...

Page 198: ...ndition of oil Check discharge superheat Evaporator Check water flow Check water pH glycol strength Check water pressure drop Check heater Air cooled condensers Check for airflow obstructions Brush fi...

Page 199: ...les and Service Center for information Please quote the unit model number and serial number When ordering spare parts we will require the following information to ensure the correct parts are supplied...

Page 200: ...ayed value is limit approximately correct The warning message should clear when the ambient air temperature rises above the programmed operating limit Check the programmed settings are correct for the...

Page 201: ...IL PRESS DIFF is displyed High oil differential pressure Ball valve in oil circuit closed Dirty blocked oil filter Check ball valves are open position Check and change oil filter cartridge SYS LOW SUC...

Page 202: ...he following costs and expenses 1 Labor to remove or reinstall any equipment materials or components 2 Shipping handling or transportation charges 3 Cost of refrigerant No warranty repairs or replacem...

Page 203: ...9 78 172 4 196 91 1 80 176 200 93 3 82 179 6 204 95 6 84 183 2 208 97 8 86 186 8 212 100 0 88 190 4 216 102 2 90 194 220 104 4 92 197 6 224 106 7 94 201 2 228 108 9 96 204 8 232 111 1 98 208 4 236 11...

Page 204: ...1001 www york com P O Box 1592 York Pennsylvania USA 17405 1592 Subject to change without notice Printed in USA Copyright by York International Corporation 2004 ALL RIGHTS RESERVED Form 201 19 NM1 204...

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