York Millennium YDAS 410 Installation Operation & Maintenance Download

Page: 129 / 136

FORM 201.10-NM4

129

YORK INTERNATIONAL

PROBLEM

CAUSE

SOLUTION

“MOTOR CURRENT”

CONTACTOR DOES

FAULT

NOT ENERGIZE

Motor contactor may not

1. External high pressure

1. Check mechanical high

energize.

switch tripped.

pressure cut out, fan
operation, and discharge
stored in memory.
Forward running fans will
have air flow upward.

2. External motor

2. Check for defective

protector tripped.

motor protector, wiring,
and motor problems.
Assure the motor protector
is not tripped due to a
tripped mechanical high
pressure switch.

3. Defective Relay Output

3. Relay Output Board

Board

defective.

CONTACTOR ENERGIZES

1. Improper system high

1. Check system high

high voltage.

voltage supply.

2. Defective contactor

2. Check contactor and

contacts or contactor.

and contact.

3. Faulty high voltage wiring.

3. Check wiring.

4. High motor current stored

4. Loose J10 (SYS 1) or

in memory.

J11 (SYS 2) calibration
resistors on Power
Board.

5. Defective current

5. C.T. resistance =

transformer (C.T.)

42 - 44 ohms.

Summary of Contents for Millennium YDAS 410

Page 1: ...IC Supersedes Nothing Form 201 10 NM4 1298 YDAJ 4 SYSTEM With EPROM Standard Brine Metric Models Combined 031 01714 105 031 01714 105 MASTER SUBORDINATE M A N U F A C T U R E R C ERTIFIED TO ARI AS C O M P L Y I N G W I T H A RI STANDARD 550 C E N T R A L S T ATION AIR H A N D L I N G UNITS YDAS 410 490 STYLE D ...

Page 2: ...ompressor Vibration Isolator 38 WGHT DISTBTN ISOLATOR LCTN English 40 WGHT DIST ISOLATOR LOCATION SI 41 YDAS 410 490 SYS 1 AND 2 WIRING DIAGRAM Wye Delta Start 42 Fig 22 Elementary Diagram 42 YDAS 410 490 SYS 1 2 CONNECTION DIAGRAM Wye Delta Start 44 Fig 23 Connection Diagram 44 Fig 24 Wye Delta Closed Start 46 Fig 25 Compressor Terminal Box 47 YDAS 410 490 SYS 3 AND 4 WIRING DIAGRAM Wye Delta Sta...

Page 3: ...ual Lead Lag 74 2 STATUS KEY AND FAULT MESSAGES 2 1 General 76 2 2 General Status Messages 76 2 3 Anticipation Control Status Messages 78 2 4 Chiller Fault Status Messages 79 2 5 System Fault Status Messages 80 2 6 Printout On Fault Shutdown 83 3 DISPLAY KEYS AND OPTION SWITCHES 3 1 General 84 3 2 Chilled Liquid Temps Key 84 3 3 Ambient Temp Key 85 3 4 System Press Temp Keys 85 3 5 Motor Current K...

Page 4: ...M KEY 8 1 General 112 8 2 Program Key User Programmable Values 113 8 3 Programming Default Values 119 8 4 Compressor Motor Full Load Amps Data 121 8 5 System Design Condensing Temperature Data 122 YDAS 410 490 FAN CONTROL STRATEGY 123 Fig 43 Fan Location Operation 123 SYSTEM STARTUP CHECKLIST 124 Checking The System 24 Hours Prior 124 Panel Cheks 125 Initial Start Up 126 Checking Superheat Subcool...

Page 5: ...l test is performed with water flowing through the coolers to check that each refrigeration circuit operates correctly GENERAL CHILLER INFORMATION The unit structure is heavy gauge galvanized steel covered with a baked on enamel Base rails are of formed double thickness painted plate steel Units are designed in accordance with ARI 550 NFPA 70 Na tional Electrical Code ASHRAE ANSI 15 Safety code fo...

Page 6: ...racteristics of the unit YD A S 410 X 46 Y D YORK Dual Chiller Design Series Air Cooled Type Start Y WYE Delta X Across the Line Compressor Design Series S Screw Unit Model Voltage Code 17 200 3 60 28 230 3 60 Class 46 460 3 60 Blank Standard Efficiency 58 575 3 60 X High Efficiency ...

Page 7: ... x 83 4 row deep coils Gear in System 1 XHS 120 Compressor in System 1 A M F H P or S 3 row deep coils in System 2 N 32 x 83 4 row deep coils in both systems Motor in 60 Hz System 1 Compressor Max KW 0 101 Frame 7 Long N A 1 101 Frame 8 Long 85 Cooler Code 2 101 Frame 9 Long 105 H 16 Cooler 3 101 Frame 9 5 Long N A K 18 Cooler 4 101 Frame 10 Long 126 N 20 Cooler 5 101 Frame 10 75 Long 150 6 124 Fr...

Page 8: ...30 440 40 52 5005 16065 0 130 470 40 52 5005 16065 0 130 490 40 52 5005 16065 0 130 NOTES 1 For leaving brine temperature below 40 F contact your nearest YORK office for application requirements 2 For leaving water temperature higher than 52 F contact your nearest YORK office for application guidelines 3 The evaporator is protected against freeze up to 20 F with an electrical heater as standard 4 ...

Page 9: ...t 5 YDAS Units have two coolers in parallel FIG 2B COOLER WATER PRESSURE DROP TOTAL SI OPERATIONAL LIMITATIONS SI VOLTAGE LIMITATIONS The following voltage limitations are ab solute and operation beyond these limita tions may cause serious damage to the compressor VOLTAGES UNIT POWER MIN MAX 200 3 60 180 220 230 3 60 207 253 460 3 60 414 506 575 3 60 517 633 MODEL LEAVING WATER COOLER FLOW AIR ON ...

Page 10: ...8 108 108 108 COOLER FLOW GPM MIN 500 500 500 500 MAX 1606 1606 1606 1606 CONDENSER Sys 1 4 4 4 4 ROWS Sys 2 4 4 4 4 Sys 3 4 4 4 4 Sys 4 4 4 4 4 CONDENSER FACE AREA FT 2 590 590 590 590 NO 16 16 16 16 CONDENSER HP KW 3 2 8 3 2 8 3 2 8 3 2 8 FANS NO OF BLADES 6 6 6 6 AIRFLOW CFM 268 000 268 000 268 000 268 000 SHIPPING Al FIN 30 664 30 664 30 664 30 664 WEIGHT Cu FIN 35 196 35 196 35 196 35 196 LBS...

Page 11: ...8 VOLUME L 488 488 488 488 COOLER FLOW L s MIN 31 5 31 5 31 5 31 5 MAX 101 3 101 3 101 3 101 3 CONDENSER Sys 1 4 4 4 4 ROWS Sys 2 4 4 4 4 Sys 3 4 4 4 4 Sys 4 4 4 4 4 CONDENSER FACE AREA m2 55 55 55 55 NO 16 16 16 16 CONDENSER HP KW 3 2 8 3 2 8 3 2 8 3 2 8 FANS NO OF BLADES 6 6 6 6 AIRFLOW L sec 126 478 126 478 126 478 126 478 SHIPPING Al FIN 13 909 13 909 13 909 13 909 WEIGHT Cu FIN 15 965 15 965 ...

Page 12: ... obstructions or clutter that would impede air flow through the unit In installations where winter operation is intended and snow accumulations are expected additional unit elevation must be provided to insure air flow NOTE Reduced clearances may be used due to jobsite restrictions The unit will unload to prevent the condenser pressure and motor current from exceeding the maximum limits and will c...

Page 13: ...FORM 201 10 NM4 13 YORK INTERNATIONAL DIMENSIONS MODELS YDAS 410 490 English Units LD01602 LD01601 FIG 4 MODEL YDAS 410 490 DIMENSIONS ENGLISH UNITS ...

Page 14: ...l obstructions or clutter that would impede air flow through the unit In installations where winter operation is intended and snow accumulations are expected additional unit height must be provided to insure air flow NOTE Reduced clearances may be used due to jobsite restrictions The unit will unload to prevent the condenser pressure and motor current from exceeding the maximum limits and will con...

Page 15: ...FORM 201 10 NM4 15 YORK INTERNATIONAL MODELS YDAS 410 490 SI Units LD01606 LD01605 FIG 6 MODEL YDAS 410 490 DIMENSIONS SI UNITS ...

Page 16: ...ed based on ampacity and job requirements using N E C wire sizing information The above recommendations are based on the National Electrical Code and using copper connectors only Field wiring must also comply with local codes 8 A ground lug is provided for each compressor system to accommodate field grounding conductor per N E C Article 250 54 A control circuit grounding lug is also supplied Incom...

Page 17: ...300 400 300 400 2 6 250 1 0 500 183 331 1051 5 0 YDAS410 575 203 200 250 300 250 300 2 6 250 1 0 500 147 270 857 4 9 460 314 400 400 500 400 500 2 6 250 1 0 500 235 398 1261 5 0 YDAS440 575 253 400 300 400 300 400 2 6 250 1 0 500 187 311 987 4 9 460 314 400 400 500 400 500 2 6 250 1 0 500 235 398 1261 5 0 YDAS470 575 253 400 300 400 300 400 2 6 250 1 0 500 187 311 987 4 9 460 332 400 400 500 400 5...

Page 18: ...t will accept a single wire up to 600MCM or 2 wires up to 250MCM Actual wire size and number of wires per phase must be determined based on ampacity and job requirements using N E C wire sizing information The above recommendations are based on the National Electrical Code and using copper connectors only Field wiring must also comply with local codes 8 A ground lug is provided for each compressor...

Page 19: ...hematics on pages 42 65 SYSTEM 1 SYSTEM 2 MODEL VOLTS COMPRESSOR FANS COMPRESSOR FANS RLA Y LRA X LRA FLA EA RLA Y LRA XLRA FLA EA YDAS410 460 183 331 1051 5 0 163 262 838 5 0 575 147 270 857 5 0 130 204 655 4 9 YDAS440 460 235 398 1261 5 0 184 331 1051 5 0 575 187 311 987 5 0 147 270 857 4 9 YDAS470 460 235 398 1261 5 0 235 398 1261 5 0 575 187 311 987 5 0 187 311 987 4 9 YDAS490 460 249 398 1261...

Page 20: ...and job requirements using N E C wire sizing information The above recommendations are based on the National Electrical Code and using copper connectors only Field wiring must also comply with local codes 8 A ground lug is provided for each compressor system to accommodate field grounding conductor per N E C Article 250 54 A control circuit grounding lug is also supplied Incoming ground wire range...

Page 21: ...92 10 0 700 800 375 785 1879 10 0 230 600 800 367 641 2035 12 0 600 700 328 641 1723 12 0 YDAS410 380 400 500 232 401 1272 5 2 350 450 206 316 1013 5 2 460 300 400 183 331 1051 5 0 300 350 163 331 838 5 0 575 250 300 147 270 857 4 9 225 300 130 270 655 4 9 380 500 600 296 483 1531 5 2 400 500 233 401 1272 5 2 YDAS440 460 400 500 235 398 1261 5 0 300 400 184 398 1051 5 0 575 300 400 187 311 987 4 9...

Page 22: ... C wire sizing information The above recommendations are based on the National Electrical Code and using copper connectors only Field wiring just also comply with local codes 8 A ground lug is provided for each compressor system to accommodate field grounding conductor per N E C Article 250 54 A control circuit grounding lug is also supplied Incoming ground wire range is 6 350 MCM 9 The field supp...

Page 23: ...0 500 232 401 1272 5 2 350 450 206 316 1013 5 2 460 300 400 183 331 1051 5 0 300 350 163 331 838 5 0 575 250 300 147 270 857 4 9 225 300 130 270 655 4 9 380 500 600 296 483 1531 5 2 400 500 233 401 1272 5 2 YDAS440 460 400 500 235 398 1261 5 0 300 400 184 398 1051 5 0 575 300 400 187 311 987 4 9 250 350 147 311 857 4 9 380 500 600 296 483 1531 5 2 500 600 296 483 1531 5 2 YDAS470 460 400 500 235 3...

Page 24: ...YORK INTERNATIONAL 24 YDAS 410 490 CHILLER COMPONENTS 00064VIP FANS 16 CONTROL PANEL COMP 1 COMP 2 COMP 3 FIG 7 YDAS 410 490 CHILLER COMPONENTS COMP 4 POWER PANEL CONDENSER COILS ...

Page 25: ...FORM 201 10 NM4 25 YORK INTERNATIONAL 27507A FILTER DRIER WATER OUTLET THERMOSTAT WATER INLET FIG 8 YDAS 410 490 CHILLER TYPICAL COOLER COMPONENTS YDAS 410 490 CHILLER COMPONENTS ...

Page 26: ...OIL DRAIN LINE DISCHARGE SERVICE VALVE DISCHARGE PRESSURE TRANSDUCER OPTIONAL DISCHARGE MUFFLER 28510A ECONOMIZER PIPING MOTOR TERMINAL BOX ECONOMIZER SERVICE VALVE 5 TON TXV MOTOR COOLING PIPING LIQUID INJECTION PIPING OIL PRESSURE TRANSDUCER OIL INJECTION PIPING SLIDE VALVE CONTROL SOLENOID FIG 9 YDAS 410 490 CHILLER COMPONENTS ...

Page 27: ...QUID LINE SOLENOID SYS 2 TXV SYS 2 SIGHT GLASS 28513A DISCHARGE PIPING SUCTION SERVICE VALVE DISCHARGE SERVICE VALVE DISCHARGE PRESSURE TRANSDUCER OPTIONAL DISCHARGE MUFFLER SUCTION PIPING DISCHARGE TEMPERATURE SENSOR SLIDE VALVE PISTON OIL SUPPLY VENT LINE OIL HEATER ELECTRICAL JUNCTION BOX EVAPORATOR FIG 10 YDAS 410 490 CHILLER COMPONENTS ...

Page 28: ...UB COOLER ECONOMIZER 15 TON TXV LIQUID SUPPLY SOLENOID 15 TON TXV ECONOMIZER PIPING OIL INJECTION PIPING OIL SEPARATOR 5 TON TXV MOTOR COOLING PIPING LIQUID INJECTION SOLENOID VALVE 5 TON TXV LIQUID INJECTION PIPING YDAS 410 490 CHILLER COMPONENTS FIG 11 YDAS 410 490 CHILLER COMPONENTS ...

Page 29: ...FORM 201 10 NM4 29 YORK INTERNATIONAL YDAS 410 490 CHILLER COMPONENTS FIG 12 YDAS 410 490 CHILLER COMPONENTS FILTER DRYER 28514A LIQUID STOP VALVE ...

Page 30: ...YORK INTERNATIONAL 30 LD01091 COMPRESSOR SIDE VIEW MAY BE ON SIDE OR REAR OF MOTOR COVER YDAS 410 490 COMPRESSOR COMPONENTS COMPRESSOR SIDE VIEW FIG 13 YDAS 410 490 COMPRESSOR COMPONENTS ...

Page 31: ... 31 YORK INTERNATIONAL LD01092 NOTE On newer production chillers this valve will not be located on the compressor COMPRESSORTOP VIEW FIG 14 YDAS 410 490 COMPRESSOR COMPONENTS COMPRESSOR FRONT VIEW COMPRESSOR REAR VIEW ...

Page 32: ...YORK INTERNATIONAL 32 FIG 15 COMPRESSOR GAS FLOW DIAGRAM LD01093 GAS OFF ECONOMIZER HEAT EXCHANGER OIL INJECTION DISCHARGE SUCTION LIQUID INJECTION MOTOR TERMINAL BOX COMPRESSOR GAS FLOW DIAGRAM ...

Page 33: ...FORM 201 10 NM4 33 YORK INTERNATIONAL LD01285 FIG 16 SCREW CHILLER REFRIGERANT FLOW DIAGRAM REFRIGERANT FLOW DIAGRAM ...

Page 34: ...sor incorporates a complete anti friction bearing design for reduced power input and increased reliability Four separated cylindrical roller bearings handle radial loads Angular contact ball bearings handle axial loads Together they maintain accurate rotor posi tioning at all pressure ratios thereby minimizing leak age and maintaining efficiency A check valve is installed in the compressor dischar...

Page 35: ...ubri cates the rotors as well as provides an oil seal against leakage around the rotors to assure refrigerant com pression volumetric efficiency The oil also provides cooling by transferring much of the heat of compres sion from the gas to the oil keeping discharge tempera tures down and reducing the chance for oil breakdown Oil injected into the rotor cage flows into the rotors at a point about 1...

Page 36: ...r and will not hurt the motor due to the extra torque built into the design STARTER Two types of compressor motor starting are available Across the line and optional Wye Delta Closed Tran sition Starter The Across the line starters will utilize one contactor per compressor The optional Wye Delta starter utilizes 4 contactors a time delay relay and wire wound power resistors for each compressor See...

Page 37: ...to be followed to install and start up the chiller HANDLING These units are shipped as completely assembled units containing full operating charge and care should be taken to avoid damage due to rough handling The units are shipped with export crating unless it is specified by Sales Order A unit should be lifted by inserting hooks through the holes provided in unit base rails Spreader bars should ...

Page 38: ...m Chiller noise is a result of compressor and fan operation Con siderations should be made utilizing noise levels pub lished in the YORK Engineering Guide for the specific chiller model If questions arise contact YORK PROD UCT MARKETING SHIPPING BRACES A single painted shipping bracket on the opposite end of the control panel runs diagonally along the end of the unit This may be removed once the u...

Page 39: ...ize of pipe in which it is to be installed See Manufacturer s Instructions furnished with switch The switches are to be wired to terminals in the control panels as shown in the WIRING DIA GRAM pages 42 65 Connect the flow switch con tacts on the evaporator associated with compressors 1 and 2 to the Master control panel and the flow switch contacts associated with compressors 3 and 4 to the Subordi...

Page 40: ... MODEL OPERATING WEIGHT DISTRIBUTION LBS AND ISOLATOR LOCATION A B C D E F G H I J K L M N O P YDAS410 2327 2262 2197 2132 2369 2303 2237 2171 1997 2152 2307 2457 2033 2191 2349 2507 ISOLATOR CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 YDAS440 2327 2262 2197 2132 2369 2303 2237 2171 1997 2152 2307 2457 2033 2191 23...

Page 41: ...SOLATOR LOCATION A B C D E F G H I J K L M N O P YDAS410 1056 1026 997 967 1075 1045 1015 985 906 976 1046 1117 922 994 1065 1137 ISOLATOR CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 YDAS440 1056 1026 997 967 1075 1045 1015 985 906 976 1046 1117 922 994 1065 1137 ISOLATOR CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP 4 26 CP ...

Page 42: ...th any line voltage wiring 4 To cycle unit on and off automatically with contact shown install a cycling device in series with the flow switch FSLW See Note 3 for contact rating and wiring speci fications Also refer to cautions on the following page 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...

Page 43: ...08 000 suppres sor across the relay contactor coil which activates the con tacts Any contacts connected to flow switch inputs or BAS in puts on terminals 13 19 or TB3 or any other terminals must be suppressed with a YORK P N 031 00808 000 suppressor across the relay contactor coil which activates the contacts CAUTION Control wiring connected to the control panel should never be run in the same con...

Page 44: ...YORK INTERNATIONAL 44 YDAS 410 490 SYSTEMS 1 2 CONNECTION DIAGRAM WYE DELTA START FIG 23 YDAS 410 490 SYSTEMS 1 2 CONNECTION DIAGRAM WYE DELTA START LD02051 ...

Page 45: ...FORM 201 10 NM4 45 YORK INTERNATIONAL FIG 23 YDAS 410 490 SYSTEMS 1 2 CONNECTION DIAGRAM WYE DELTA START CONT D LD02052 ...

Page 46: ...YORK INTERNATIONAL 46 YDAS 410 490 SYSTEMS 1 2 WIRING DIAGRAM WYE DELTA CLOSED TRANSITION START LD03094 LD03095 LD03096 FIG 24 YDAS 410 490 SYSTEMS 1 2 WIRING DIAGRAM WYE DELTA CLOSED START ...

Page 47: ...FORM 201 10 NM4 47 YORK INTERNATIONAL YDAS 410 490 SYSTEMS 1 AND 2 COMPRESSOR TERMINAL BOX WYE DELTA START LD02054 FIG 25 COMPRESSOR TERMINAL BOX ...

Page 48: ...cautions on the following page 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 connected between terminals 5 and 1 De vice must have a minimum contact rating of 100VA at 115 volts A C 6 Alarm contacts are for annunciating alarm unit mal function Contacts are rated at 115V 100VA resis tive...

Page 49: ...ressor across the relay contactor coil which acti vates the contacts Any contacts connected to flow switch inputs or BAS inputs on terminals 13 19 or TB3 or any other termi nals must be suppressed with a YORK P N 031 00808 000 suppressor across the relay contactor coil which activates the contacts CAUTION Control wiring connected to the control panel should never be run in the same conduit with po...

Page 50: ...YORK INTERNATIONAL 50 YDAS 410 490 SYSTEMS 3 AND 4 CONNECTION DIAGRAM WYE DELTA START FIG 27 YDAS 410 490 SYSTEMS 3 4 CONNECTION DIAGRAM WYE DELTA START LD02066 ...

Page 51: ...FORM 201 10 NM4 51 YORK INTERNATIONAL FIG 27 YDAS 410 490 SYSTEMS 3 4 CONNECTION DIAGRAM WYE DELTA START CONT D LD02067 ...

Page 52: ...YORK INTERNATIONAL 52 YDAS 410 490 SYSTEMS 3 AND 4 WIRING DIAGRAM WYE DELTA CLOSED TRANSITION START FIG 28 YDAS 410 490 SYSTEMS 3 4 WIRING DIAGRAM WYE DELTA CLOSED TRANSITION START LD02066 ...

Page 53: ...FORM 201 10 NM4 53 YORK INTERNATIONAL YDAS 410 490 SYSTEMS 3 AND 4 COMPRESSOR TERMINAL BOX WYE DELTA START LD02069 FIG 29 YDAS 410 490 SYSTEMS 3 4 COMPRESSOR TERMINAL BOX WYE DELTA START ...

Page 54: ...cautions on the following page 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 connected between terminals 5 and 1 De vice must have a minimum contact rating of 100VA at 115 volts A C 6 Alarm contacts are for annunciating alarm unit mal function Contacts are rated at 115V 100VA resis tive...

Page 55: ...0808 000 sup pressor across the relay contactor coil which acti vates the contacts Any contacts connected to flow switch inputs or BAS inputs on terminals 13 19 or TB3 or any other termi nals must be suppressed with a YORK P N 031 00808 000 suppressor across the relay contactor coil which activates the contacts CAUTION Control wiring connected to the control panel should never be run in the same c...

Page 56: ...YORK INTERNATIONAL 56 YDAS 410 490 SYSTEMS 1 AND 2 CONNECTION DIAGRAM ACROSS THE LINE START FIG 31 YDAS 410 490 SYSTEMS 1 2 CONNECTION DIAGRAM ACROSS THE LINE START LD02044 ...

Page 57: ...FORM 201 10 NM4 57 YORK INTERNATIONAL FIG 31 YDAS 410 490 SYSTEMS 1 2 CONNECTION DIAGRAM ACROSS THE LINE START CONT D LD02045 ...

Page 58: ...YORK INTERNATIONAL 58 YDAS 410 490 SYSTEMS 1 AND 2 CONNECTION DIAGRAM SYSTEM WIRING ACROSS THE LINE START FIG 32 YDAS 410 490 SYSTEMS 1 2 SYSTEM WIRING ACROSS THE LINE START LD02046 ...

Page 59: ...FORM 201 10 NM4 59 YORK INTERNATIONAL YDAS 410 490 SYSTEMS 1 AND 2 COMPRESSOR TERMINAL BOX ACROSS THE LINE START LD02047 FIG 33 YDAS 410 490 SYSTEMS 1 AND 2 COMPRESSOR TERMINAL BOX ACROSS THE LINE START ...

Page 60: ... See Note 3 for contact rating and wiring specifications Also refer to cautions on the following page 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 connected between terminals 5 and 1 De vice must have a minimum contact rating of 100VA at 115 volts A C 6 Alarm contacts are for annunciat...

Page 61: ...nected to flow switch inputs or BAS inputs on terminals 13 19 or TB3 or any other ter minals must be sup pressed with aYORK P N 031 00808 000 sup pressor across the re lay contactor coil which activates the contacts CAUTION Control wiring con nected to the control panel should never be run in the same conduit with power wiring MAX NON CONTROL MIN DUAL FUSED UNIT POWER CIRCUIT ELEMENT DISC VOLTAGE ...

Page 62: ...YORK INTERNATIONAL 62 YDAS 410 490 SYSTEMS 3 4 CONNECTION DIAGRAM ACROSS THE LINE START FIG 35 YDAS 410 490 SYSTEMS 3 4 CONNECTION DIAGRAM ACROSS THE LINE START LD03688 ...

Page 63: ...FORM 201 10 NM4 63 YORK INTERNATIONAL FIG 35 YDAS 410 490 SYSTEMS 3 4 CONNECTION DIAGRAM ACROSS THE LINE START CONT D LD03689 ...

Page 64: ...YORK INTERNATIONAL 64 YDAS 410 490 SYSTEMS 3 4 CONNECTION DIAGRAM SYSTEM WIRING ACROSS THE LINE START FIG 36 YDAS 410 490 SYSTEMS 3 4 SYSTEM WIRING ACROSS THE LINE START LD02061 ...

Page 65: ...FORM 201 10 NM4 65 YORK INTERNATIONAL YDAS 410 490 SYSTEMS 3 4 COMPRESSOR TERMINAL BOX ACROSS THE LINE START LD03690 FIG 37 YDAS 410 490 SYSTEMS 3 4 COMPRESSOR TERMINAL BOX ACROSS THE LINE START ...

Page 66: ...intout of both cur rent real time operating and programmed data as well as fault history data from recent safety shutdowns PROGRAM SETUP KEYS Entry Keys see Section 5 The numeric and associated keys are used for entering data as required for programming of the chiller The Enter key is also used for scrolling through informa tion available after pressing certain keys Setpoint Keys see Section 6 The...

Page 67: ... a single split circuit evaporator serving either 2 or 3 independent refrigerant systems YCAS 2 System chillers are configured as a single self contained section with a single control panel controlling the 2 refrigerant systems YCAS 3 System chillers are divided into a Master section containing Systems 1 2 and a Subordinate section containing System 3 YDAS chillers have two split circuit evaporato...

Page 68: ... chiller is shut down or power failure is expected for extended periods it may be desirable to disable the clock to save battery life The clock can then be reactivated and reprogrammed when the chiller is returned to ser vice This will not affect the maintenance of programmed values and stored data by the backup battery While the chiller is operating the clock must be On Sec tion 1 8 Item 1 or the...

Page 69: ...ill shut down and the NO RUN PERM message will be displayed The location of the flow switch Start Stop connections is shown in Sec tion 1 9 NOTE Never bypass a flow switch This will cause damage to the chiller and void any warranties NOTE Wiring from remote dry contacts for stop start reset functions should not exceed 25 ft and should be run in grounded conduit that does not carry any wiring other...

Page 70: ...Reset per sec 30 20 1 5 F per sec 2 Closure Time 12 1 5 1 9 seconds To determine the new setpoints add the reset to the set point programmed into memory In the example above if the programmed setpoint 44 F the new setpoint after the 9 second contact closure would be 44 F 12 F 56 F This new setpoint can be viewed on the display by press ing the Remote Reset Temperature Range key To maintain a given...

Page 71: ...user are in the electrical circuit connected to the dry alarm contacts the device must be suppressed at the load with a RC suppressor YORK Part Number 031 00808 000 across the inductive coil Typically sev eral are supplied loose with the panel Failure to install suppressors will result in nuisance faults and possible damage to the chiller NOTE If the alarm circuit is applied in an application used...

Page 72: ...MPUTER CONTROL CENTER MICROPROCESSOR BOARD POWER SUPPLY BOARD RELAY OUTPUT BOARD 1 RELAY OUTPUT BOARD 2 TB4 TERMINAL BLOCK TERMINALS 13 19 FLOW SWITCH TEMP PWM LEAD LAG ETC I O EXPANSION BOARD FIG 39 MICROCOMPUTER CONTROL CENTER 27962A ...

Page 73: ...N CONTACTOR SYS 2 FAN CONTACTORS 1A SYS 1 TRANSITION CONTACTORS SYS 1 FAN OVERLOADS 2 FU 1 FU SYS 2 FAN OVERLOADS 27963A FIG 40 WYE DELTA START POWER PANEL SYS 2 4 5 6 C T s POWER SUPPLY BOARD 2 CR SYS 2 10 11 12 C T s MOTOR OVERLOAD 2 TR 1 CR 1 TR SYS 2 POWER WIRING CONNECTIONS NOTE SYS 2 CONTACTORS NOT VISIBLE SYS 1 POWER WIRING CONNECTIONS NOTE SYS 1 CONTACTORS NOT VISIBLE EARTH GROUND CONNECTI...

Page 74: ... resulting lead lag determination are discussed below 1 The micro automatically defaults the lead to SYS 1 and the lag to SYS 2 if both compressors are ready to start Anti recycle Timers timed out and compres sors have equal run time 2 If both compressors are ready to start Anti recycle Timers timed out the compressor with the lowest run hours will start first 3 If both compressors are waiting to ...

Page 75: ...d the micro attempts to balance run time between the two compressors in ei ther the Master or Subordinate modules A number of condi tions can occur which will prevent this from happening Factors determining lead lag selection and the result ing lead lag determination are discussed below 1 The micro automatically defaults the lead to SYS 1 or 3 and the lag to SYS 2 or 4 if both compressors in eithe...

Page 76: ... anti recycle timer status The display will show one message relating to the highest priority information to be displayed as determined by the Microprocessor For individual system status or fault messages the dis play shows information for up to two refrigerant sys tems For models with three or four systems pressing the Status key again will scroll through messages for Systems 3 4 The main categor...

Page 77: ... lag sys tem to start Refrigerant Program Mismatch This message indicates that the type of refrigerant pro grammed under the Program key does not match the type of refrigerant selected on the S1 Dip Switches on the Microprocessor Board The chiller will not operate until this situation is corrected See Section 3 7 and 8 2 for more details NOTE It is extremely important that the programmed settings ...

Page 78: ... L I M I T I N G S Y S E M S L I M I T I N G NOTE All programmed values and stored data other than the internal clock time keeping will be maintained in memory regardless of whether the clock is on or off and regardless of the length of the power failure To disable the clock place the jumper Fig 38 in the OFF position To activate it place the jumper in the ON position On power up the microprocesso...

Page 79: ...rature drops 1 F above the cutout C H I L L E R F A U L T L O W A M B I E N T T E M P Anticipation controls monitor discharge pressure mo tor current and suction temperature for each compres sor and if maximum limits are approached the slide valve loading of the respective compressor will be re duced to avoid exceeding the limit Displays of anticipation safety control messages and their meanings a...

Page 80: ... T L O W W A T E R T E M P 2 5 SYSTEM FAULT STATUS MESSAGES A System Fault will shut the affected system down when ever a preset safety threshold is exceeded Automatic restart will occur after the first 2 shutdowns when the anti recycle timer times out and temperature demand exists After any combination of 3 Manual Reset Safe ties in a 90 minute time period the affected system will shut down and l...

Page 81: ...s computed by measuring discharge oil sepa rator pressure and subtracting oil pressure returning to the compressor Discharge Oil Oil PSID Under typi cal operation the oil pressure differential display will read less than 25 PSID If oil pressure at the compressor drops due to filter blockage the differential pressure on the display will increase and when the maximum limit is reached the compressor ...

Page 82: ...tactor loose wiring or a fault in the motor winding S Y S P H A S E R O T A T I O N S Y S P H A S E R O T A T I O N After 1 second of operation the current of any phase must be within 40 of the average current of the three phases If a phase current is outside these limits for more than three seconds the system will be shut down High Oil Temperature Cutout This safety assures that oil temperature d...

Page 83: ...e compressor contactors and shuts down the compressor Auto restart will not be permitted as a manual reset of the device is required to restart the compressor After the first fault the micro will try two more restarts but with the External Motor Overload Relay tripped no re start can occur The micro will then lock out the system In addition to manually resetting the External Motor Overload Relay t...

Page 84: ...han or less than the values which are being displayed but are outside the ability of the micro to give an actual reading This is unlikely to occur unless a problem exists in the mea suring sensors or during extreme conditions The Display keys and the data available from each is as follows 3 2 CHILLED LIQUID TEMPS KEY When the Chilled Liquid Temperatures key is pressed a display of chilled liquid t...

Page 85: ...A T 1 2 2 F A M B I E N T A I R 7 1 9 F Saturated discharge and suction temperatures are com puted by converting measured pressure to temperature Slide Valve Position is computed from average FLA motor current discharge pressure and the number of load pulses sent to the compressor NOTE Slide valve position is approximate and should be used for reference only Under many condi tions it will read wel...

Page 86: ...he Microprocessor Board Proper programming of the switches is important during the commissioning of the chiller The Options key can be used to verify the Dip Switch positions without looking at or handling the Microprocessor Board When the Options key is pressed the following mes sage will first be displayed for three seconds Eight Option Messages will then be displayed in se quence each for three...

Page 87: ... expan sion valves or electronic expansion valves SWITCH 5 Units of Measurement Open English Units Mode causes all information relating to pressures temperatures etc to be displayed in En glish Imperial units F PSI etc Closed S I Units Mode causes all information relating to pres sures temperatures etc to be displayed in S I Met ric units C BAR etc For conversion purposes 1BAR 14 5 PSIG SWITCH 6 C...

Page 88: ...faulted and waiting to restart has its system switch on the micro board in the OFF position or a run permissive is keeping an individual system from running the lag compressor is swapped to the lead This occurs whether the lag compressor group is on or off See Section 1 12 and 8 2 for additional details and programming SWITCH 8 Refrigerant Open The R134a mode MUST be selected for models using refr...

Page 89: ...89 YORK INTERNATIONAL DIP SWITCH PHYSICAL LOCATION AND SETTING 26001A OPEN Position Left side of switch pushed in CLOSED Position Right side of switch pushed in A LD01098 FIG 42 DIP SWITCH PHYSICAL LOCATION AND SETTING ...

Page 90: ...ections The data is stored in temporary memory then transmit ted from the Microprocessor to the remote printer As the data is transmitted it is erased from the memory Information available using the Operating Data key is de scribed in the following sections In example displays is used to indicate system number where appropriate 4 3 OPERATING DATA LOCAL DISPLAY MESSAGES YCAS 2 SYSTEM MODELS When th...

Page 91: ...ystem Data sequence has been repeated for the second system pressing the Enter key again will loop back to the beginning of the common data sec tion To leave the sequence at any point press a key from another section of the keypad YCAS 3 SYSTEM MODELS YCAS 3 system models are constructed in two sections One section contains numbers 1 and 2 refrigerant sys tems plus the common three circuit evapora...

Page 92: ... auxiliary con tacts optional for the evaporator water pump ON contacts closed OFF contacts open Evaporator Heater control depends on ambient tem perature as follows If measured ambient falls below 40 F the Evaporator Heater is switched ON If mea sured ambient then rises above 45 F the heater is switched OFF The evaporator heater prevents water standing in the evaporator from freezing System Data ...

Page 93: ...operating data messages and their mean ings are as follows At any particular point in the loading sequence the mi cro will decide which section of the chiller will load next and which will be held at a fixed balanced load state The above message indicates that in this case thesubordinate section is being held in balance and the master section will be allowed to load at the next load pulse The mast...

Page 94: ...System 3 At the end of this sequence the displays scroll back to the beginning of the common data section 4 4 OPERATING DATA REMOTE PRINTOUT The following text shows a typical example printout ob tained by pressing the Operating Data key with an op tional printer attached In this case an example is given for a YCAS 3 System Chiller YCAS 2 System models and YDAS models provide similar printouts for...

Page 95: ...own press the appropriate key on the numeric key pad then press Enter Remember that the most recent fault information is stored as shut down No 1 Repetitively pressing the Enter key now scrolls through the information available in the Safety Shutdown buffer This is divided into Common whole chiller Data and Individual System Data displays as follows Common Data This message advises the time and da...

Page 96: ... system was in the lead at the time of the fault This message shows whether remote or local commu nications were selected at the time of the fault System Data Following the Common Data data is a sequence of twenty information displays which are given twice first for System 1 then for System 2 In each example is used to indicate system number This message indicates whether the compressor on this sy...

Page 97: ...ssive flow switch remote Start Stop was in the Run mode On Closed or fiStopfl mode Off open at the time of the fault YCAS 3 SYSTEM MODELS YCAS 3 system models are constructed in two sections One section contains numbers 1 and 2 refrigerant sys tems plus the common 3 circuit evaporator This section is called the Master section The second section containsnumber 3 refrigerant system and is called the...

Page 98: ...shows the Target Temperature programmed at the time of the fault This message indicates the surrounding Ambient AIr Temperature at the time of the fault This display shows the Low Ambient Cutout pro grammed at the time of the fault This display shows the Low Suction Pressure Cutout programmed at the time of the fault This message shows whether remote or local commu nications were selected at the t...

Page 99: ...key can now be used to scroll the next set of displays which deal with common chiller data The common chiller data messages and their mean ings are as follows This message advises the time and date of the fault These messages indicate the nature of the chiller or system fault which has occurred in this case a system fault of excessive oil pressure differential occurred on System 1 This message ind...

Page 100: ...ety shutdown number to display 4 7 FAULT HISTORY DATA REMOTE PRINTOUT The following text shows a typical example printout ob tained by pressing the History key with an optional printer attached In this case an example is given for a YCAS 3 System Chiller YCAS 2 System Models and YDAS mod els provide similar printouts for the appropriate number of system YORK INTERNATIONAL CORPORATION MILLENNIUM SC...

Page 101: ... S AVERAGE MTR 107 57 FLA PHASE L1 MTR 109 58 FLA PHASE L2 MTR 101 54 FLA PHASE L3 MTR 112 60 FLA DIFF OIL PRESSURE 1 6 PSID SUCTION PRESSURE 61 3 PSIG SATURATED SUCTION 35 1 DEGF SUCTION TEMP 55 0 DEGF SUPERHEAT 19 9 DEGF DISCHARGE PRESSURE 221 8 PSIG SATURATED DISCHARGE 107 5 DEGF DISCHARGE TEMP 229 2 DEGF OIL TEMP 228 0 DEGF LIQUID INJECTION VALVE ON FORWARD FANS 2 REVERSE FANS OFF LIQUID LINE ...

Page 102: ...M S AVERAGE MTR 94 47 FLA PHASE L1 MTR 99 48 FLA PHASE L2 MTR 93 47 FLA PHASE L3 MTR 91 46 FLA DIFF OIL PRESSURE 2 0 PSID SUCTION PRESSURE 60 9 PSIG SATURATED SUCTION 33 9 DEGF SUCTION TEMP 42 9 DEGF SUPERHEAT 9 0 DEGF DISCHARGE PRESSURE 171 8 PSIG SATURATED DISCHARGE 90 5 DEGF DISCHARGE TEMP 211 5 DEGF OIL TEMP 188 3 DEGF LIQUID INJECTION VALVE ON FORWARD FANS 2 REVERSE FANS OFF LIQUID LINE SOLEN...

Page 103: ...e Enter key is also used to scroll through available data when using the Program Operating Data History or Set Schedule Holiday keys 5 4 CANCEL KEY When the Cancel key is pressed the cursor will always return to the first character to be programmed in the display message This allows the operator to begin re programming if an error is made When the Cancel key is pressed the values already keyed in ...

Page 104: ...the application This is accomplished by programming the acceptable deviation or range of leav ing temperatures around the desired Target tempera ture This range is called the Control Range and has the Target temperature at its midpoint The minimum acceptable temperature in the Control Range is referred to as the Low Limit Water Tempera ture which is the lowest user acceptable leaving tem perature ...

Page 105: ...for 2 and 3 Compressor YCAS Chillers If no compressors are running all safeties and run permissives are satisfied the anti recycle timers have timed out and the leaving liquid temperature rises above the upper limit of the Control Range the lead compres sor will be started An unload pulse of 3 seconds dura tion is sent to the compressor to assure it is fully un loaded After an initial period of 15...

Page 106: ...aded If the lag com pressor reaches a fully unloaded condition it will be shut down under the following condiutions a chilled liquid temperature drops below the Neutral Zone b chilled liquid temperature drops below the Target temperature and the rate of change exceeds the internally pro grammed rate limits When the lag compressor shuts down the lead compressor loading is then adjusted to match the...

Page 107: ...lated total load of the two compressors in each group as follows If no compressors are running all safeties and run permissives are satisfied and the mixing leaving liquid temperature rises above the upper limit of the Mixed Control Range the Master compressor group lead com pressor will start and load If demand continues to rise the lag compressor will start and load Load signals will be sent to ...

Page 108: ...rature as shown Key in the Low Limit of the Control Range within the allowed limits The micro will accept values from 10 0 70 0 F For values below 38 F Dip Switch S1 Switch 1 on the Microprocessor Board must be properly pro grammed for Brine Cooling see Section 3 7 If unac ceptable values are entered or the switch is incorrectly selected when setpoints below 38 F are entered the following message ...

Page 109: ...com pressor cycling or hunting of the compressor slide valves If this situation occurs leaving chilled liquid temperature may vary consider ably It is recommended that a CR of less than 3 0 F be avoided Increase the CR as needed to reduce cycling and hunting After pressing the Enter key the display will continue to show the message until another key is pressed YDAS Models Programming for YDAS mode...

Page 110: ...ess the AM PM key to change to the op posite time period NOTE The AM PM key can only be used once here If an error is made press the Cancel key and begin again Next key in the required date of the month the cursor will automatically skip from AM PM to the first digit of the date when a number key is pressed The cursor will then skip to the first digit of the year Key in the year as required Always...

Page 111: ...lure should again occur the above process will again need to be repeated to bring the chiller back on line See also Section 2 2 The displays for each day are scrolled through by re petitively pressing the Advance Day key To reprogram any of the daily schedule key in the new Start time then if necessary change the associated AM PM by pressing the AM PM key NOTE The AM PM key can only be used once h...

Page 112: ...g the Enter key Failure to press Enter will cause the new value to be lost To reprogram password protected values an access code must be entered as follows When the Program key is first pressed and the above message is displayed key in the 4 digit code 7396 then press Enter As the code is being keyed in the digits are not dis played but are shown as as shown below Pressing the Enter key repeatedly...

Page 113: ...he chiller will shut down Restart will occur automatically when temperature rises more than 1 F above the cut out and cooling demand is present see also Section 2 4 This programmable value is password protected If the SW1 Dip Switch on the Microprocessor Board is set for Standard Ambient Control see Section 3 7 the low ambient cutout is set at 25 F and is NOT pro grammable If the Dip Switch is set...

Page 114: ...feature can be used for demand limiting This is important when demand limiting is critical due to power requirements or limitations in the building See also Section 1 7 For the first 60 seconds of operation the unloading safety is disabled After this time if motor current ex ceeds the programmed limit the SYS x CRNT LIMIT ING message will appear and a 1 second unload pulse will be sent to the slid...

Page 115: ... Cutout 100 Example If Programmed Cutout 44 PSIG and the timer has run 30 seconds New Cutout 44 x 100 60 17 6 PSIG 100 Again this cutout value increases with time until after 90 seconds it equals the programmed cutout value If the suction pressure now rises to more than 5 PSI above the programmed cutout value during the 90 second time period the timer will be reset If the suction pressure does not...

Page 116: ... Panel Differential key in the re quired setting and press the Enter key to store the value into memory and scroll to the next display Lag Compressor Start Point On rising demand for cooling the Lag Compressor Start Point is the load on the lead compressor FLA or Slide Valve whichever is programmed see Load Sharing Basis later in this section at which a lag com pressor is allowed to start The micr...

Page 117: ... is the discharge pressure at which the first stage of condenser fan operation begins If compressor load in creases and discharge pressure continues to rise then at 20 PSI above the FAN CNTRL DSCH SETPOINT the second stage of fan operation begins If still more cool ing is required then at 40 PSI above the setting the third and final stage of fan operation begins The Fan Control Discharge Pressure ...

Page 118: ...ng Tem perature at 100 Load valve is password protected The allowable range of Condensing Temperature at 100 Load is 100 140 F with the default set for 125 F The value which must be programmed varies with chiller and compressor model Values for each system on each chiller model are given in the tables in Section 8 5 To program the System Condensing Temperature at 100 Load begin with system 1 the o...

Page 119: ...icro will determine the starting sequence of the re maining two compressors The sequence pos sibilities are as follows These sequences will be followed as long as anti re cycle timers and safeties do not prevent it 8 3 PROGRAMMING DEFAULT VALUES Programmable values may be individually programmed at start up or any time thereafter For ease of program ming once the type of refrigerant is programmed ...

Page 120: ... 105 Anti Recycle Timer 600 sec Leaving Chilled Liquid Cutout 36 F Suction Pressure Cutout R22 44 PSIG R134a 19 PSIG Lag Panel Start Pt YDAS Only 50 Lag Panel Diff Off YDAS Only 20 Lag Compressor Start Point 70 Lag Compressor Differential Off 50 Fan Control Discharge Pressure R22 230 PSIG Pressure Setpoint R134a 102 PSIG Fan On Off Differential R22 50 PSIG R134a 50 PSIG System Motor Current Liquid...

Page 121: ...Compressor Motor FLA 60 Hz Models MODEL 200 VOLTS 17 230 VOLTS 28 460 VOLTS 46 575 VOLTS 58 YCAS ENG DATA SYS 1 FLA SYS 2 FLA SYS 1 FLA SYS 2 FLA SYS 1 FLA SYS 2 FLA SYS 1 FLA SYS 2 FLA 140 6A2A2KN6A 338 338 294 294 147 147 118 118 160 6M4M4KN6A 406 406 354 354 176 176 141 141 170 6F5M5NN6A 484 484 421 421 210 210 169 169 180 6F5F5NN6A 484 484 421 421 210 210 169 169 190 6H6F5NN6A 598 484 522 421 ...

Page 122: ...F 128 8 F 246 6S7S7NN6A 130 1 F 130 1 F 216x 10H5H5NN6A 115 4 F 115 4 F 236x 10P6H6NN6A 118 6 F 115 3 F 266x 10S7S7NN6A 119 6 F 119 6 F Design Condensing Temperature 60 Hz Models MODEL ENG DATA ALL VOLTAGES YCAS SYS 1 CTP SYS 2 CTP SYS 3 CTP 310 6H6H6RNAA 116 1 116 1 116 1 340 6H6H6RNAA 121 3 121 3 121 3 360 6H6H6RNAA 121 1 121 1 121 1 380 6H6H6RNAA 128 8 128 8 128 8 Design Condensing Temperature ...

Page 123: ... REV 15M 16M SETPOINT SETPOINT DIFF SYS 2 3 4 FOR 6M 8M SETPOINT SETPOINT 20 PSIG SYS 1 20 PSIG DIFF OR 7 8 FOR 12M 14M SETPOINT SETPOINT 20 PSIG SYS 2 20 PSIG DIFF 1 2 FOR 5M 7M SETPOINT SETPOINT 40 PSIG SYS 1 40 PSIG DIFF OR 5 6 FOR 11M 13M SETPOINT SETPOINT 40 PSIG SYS 2 40 PSIG DIFF LD03803 PRESSURE FAN FAN RELAY ON OFF 9 10 REV 9M 10M SETPOINT SETPOINT DIFF SYS 3 OR 13 14 REV 15M 16M SETPOINT...

Page 124: ...ut the system down and as sure there is an oil level showing in the bottom or top sight glass with the com pressor off If it is necessary to add oil connect a YORK oil pump to the charging valve on the oil separator but do not tighten the flare nut on the delivery tub ing With the bottom suction end of the pump submerged in oil to avoid entrance of air operate the pump until oil drips from the fla...

Page 125: ...ues in the chart below See page 120 PROGRAMMED VALUES Refrigerant Type __________________________ Dischg Press Cut out ____________ PSIG kPa Low Amb Cut out ___________________ F C High Amb Cut out ____________________ F C Disch Press Unld _________________ PSIG kPa Avg Current Unld _____________________ FLA Anti RecycleTime _____________________ Secs LWT Cut out ________________________ F C Sucti...

Page 126: ...t be more than 15 F less than the condensing temperature The temperature corresponding to the condensing pressure from the refrigerant temperature pressure chart The subcooling temperature of each system should be calculated by recording the temperature of the liquid line at the outlet of the condenser and subtracting it from the recorded liquid line pressure at the liquid stop valve con verted to...

Page 127: ...pansion valve adjusting screw should be turned not more than one turn at a time allowing suffi cient time approximately 15 minutes between adjust ments for the system and the thermal expansion valve to respond and settle out Assure that superheat is set between 10 15 F q 1 Record the motor gas temperature economizer pressure economizer pressure converted to temperature and economizer superheat bel...

Page 128: ... load on the board NOTE Contact YORK Service before Replacing circuit Boards NO RUN PERMISSIVE 1 No chilled liquid flow 1 Check chilled liquid flow 2 Flow switch improperly 2 Check that the flow switch installed is installed according to manuafacturer s instructions 3 Defective flow switch 3 Replace flow switch 4 Remote cycling device open 4 Check cycling devices connected to terminals 13 14 of th...

Page 129: ...otor protector wiring and motor problems Assure the motor protector is not tripped due to a tripped mechanical high pressure switch 3 Defective Relay Output 3 Relay Output Board Board defective CONTACTOR ENERGIZES 1 Improper system high 1 Check system high high voltage voltage supply 2 Defective contactor 2 Check contactor and contacts or contactor and contact 3 Faulty high voltage wiring 3 Check ...

Page 130: ...ective suction pressure 6 Replace transducer or transducer or faulty wiring repair wiring HIGH DISCHARGE 1 Condenser fans not 1 Check fan motor fuses PRESSURE FAULT operating or operating and contactors backwards Assure forward fan blow NOTE If a mechanical high air upward pressure cut out opens the system will shut down 2 Too much refrigerant 2 Remove refrigerant on low motor current 3 Air in ref...

Page 131: ...parator 5 Add oil to separator HIGH OIL TEMP 1 Dirty oil cooling coil 1 Clean oil cooling coil 2 Faulty oil temp 2 Check replace valve diverting valve 3 Fault oil temp sensor 3 Check replace oil temp sensor 4 Liquid injection not operating 4 Check liquid injection LOW WATER TEMP 1 Improperly adjusted 1 Re program the low water FAULT low water temp cut out temp cut out COMPRESSOR HEATER 1 Open in 1...

Page 132: ...ed ambient a drop in temperature incorrectly by thermistor temp is within or 15 F of a thermometer placed next to the OAT sensor 3 Fans rotating backwards 3 Air flow from forward fans must be up Correct fan rotation 4 Air flow to unit restricted 4 Check recommended or is being recirculated installation clearances LOW AMBIENT TEMP 1 Temperature of outside air 1 No problem exists FAULT is below cut ...

Page 133: ...er 3 Compare the display with temperature sensor a thermometer Should be within or 2 degrees Lack of Cooling Effect 1 Fouled evaporator surface 1 Contact the local YORK Low suction pressure service representative will be observed 2 Improper flow through the 2 Reduce flow to within evaporator chiller design specs 3 Low refrigerant charge 3 Check subcooling and Low suction pressure add charge as nee...

Page 134: ...77 350 6 81 1 178 352 4 81 7 179 354 2 82 2 180 356 0 82 8 181 357 8 83 3 182 359 6 83 9 183 361 4 84 4 184 363 2 85 0 185 365 0 85 6 186 366 8 86 1 187 368 6 86 7 188 370 4 87 2 189 372 2 87 8 190 374 0 88 3 191 375 8 88 9 192 377 6 89 4 193 379 4 90 0 194 381 2 90 6 195 383 0 91 1 196 384 8 91 7 197 386 6 92 2 198 388 4 92 8 199 390 2 TEMPERATURE C C or F F 26 7 80 176 0 27 2 81 177 8 27 8 82 17...

Page 135: ...FORM 201 10 NM4 135 YORK INTERNATIONAL ...

Page 136: ...U S Olympic Team 36USC380 P O Box 1592 York Pennsylvania USA 17405 1592 Subject to change without notice Printed in USA Copyright by York International Corporation 1998 ALL RIGHTS RESERVED Form 201 10 NM4 1298 Supersedes Nothing ...

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York Millennium YDAS 410, Installation Operation & Maintenance

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