York eco YCAS Series User manual

INSTALLATION, OPERATION & MAINTENANCE
eco2
AIR-COOLED SCREW LIQUID CHILLERS
New Release Form 201.18-NM9 (602)
OPTIMIZED R-407C
YCAS AIR-COOLED LIQUID CHILLER
YCAS0218EB  YCAS0418EB 60 HZ)
YCAS0685EB  YCAS1215EB 50 HZ)
STYLE F
00258VIP
YCAS 3 SYSTEM EPROMs
Microprocessor Board
031-01798-002
YCAS 4 SYSTEM EPROMs
Microprocessor Board
I O Board #2 EPROM
031-01798-002
031-02018-001
I O Board #2 EPROM
031-02018-001
60 HZ UNITS
ONLY
Better ecology,
Better economy.

2YORK INTERNATIONAL
FORM 201.18-NM9 (602)
SECTION 1 GENERAL CHILLER INFORMATION & SAFETY
Introduction ............................................................................................................................................. 11
Warranty ................................................................................................................................................. 11
Saf ty ....................................................................................................................................................... 11
Standards for Safety .............................................................................................................................. 11
R sponsibility for Saf ty ........................................................................................................................12
About this Manual ...................................................................................................................................12
Misus of Equipm nt ...............................................................................................................................12
Suitability for Application ..................................................................................................................... 12
Structural Support ................................................................................................................................. 12
Mechanical Strength ............................................................................................................................. 12
General Access ...................................................................................................................................... 12
Pressure Systems .................................................................................................................................. 12
Electrical ................................................................................................................................................ 12
Rotating Parts ........................................................................................................................................ 13
Sharp Edges .......................................................................................................................................... 13
Refrigerants and ils ............................................................................................................................. 13
High Temperature and Pressure Cleaning ............................................................................................. 13
Em rg ncy Shutdown .............................................................................................................................. 13
SECTION 2 PRODUCT DESCRIPTION
Introduction .............................................................................................................................................14
General Description ............................................................................................................................... 14
Compressor ........................................................................................................................................... 14
Evaporator ............................................................................................................................................. 15
Condenser ............................................................................................................................................. 15
il Separator / System ........................................................................................................................... 16
il Cooling ............................................................................................................................................. 16
Capacity Control .................................................................................................................................... 16
Power and Control Panels ..................................................................................................................... 16
Microprocessor Controls ...................................................................................................................... 17
Motor Current Protection ...................................................................................................................... 17
Motor Protector Module ....................................................................................................................... 17
Current verload ................................................................................................................................... 18
Thermal verload .................................................................................................................................. 19
Current Imbalance ................................................................................................................................. 19
Improper Phase Sequence ..................................................................................................................... 19
Motor Protector Dip Switch Settings .................................................................................................... 20
Motor Starting .........................................................................................................................................24
K ypad Controls ...................................................................................................................................... 24
Display ................................................................................................................................................... 24
Entry ...................................................................................................................................................... 25
Setpoints ............................................................................................................................................... 25
Clock ...................................................................................................................................................... 25
Print ....................................................................................................................................................... 25
Program .................................................................................................................................................. 25
Acc ssori s and Options ........................................................................................................................ 25
Multiple Point Power Connection (Standard) ....................................................................................... 25
Single-Point Power Connection with Individual Circuit Protection ...................................................... 25
Single-Point Power Connection with Combined Circuit Protection ...................................................... 25
Single-Point Power Connection without Circuit Protection .................................................................. 25
Control Circuit Terminal Block ............................................................................................................... 25
Building Automation System (BAS) Interface ......................................................................................25
Condenser Coil Protection .................................................................................................................... 25
DX Cool r Options ..................................................................................................................................26
TABLE OF CONTENTS

3
YORK INTERNATIONAL
FORM 201.18-NM9 (602)
TABLE OF CONTENTS CONTD)
300 PSIG (21 bar) Waterside Design Working Pressure ........................................................................ 26
1-1/2" (38 mm) Insulation ...................................................................................................................... 26
Flange Accessory .................................................................................................................................. 26
Remote DX Cooler ................................................................................................................................. 26
Flow Switch Accessory ......................................................................................................................... 26
Star-Delta Compressor Motor Starter .................................................................................................... 26
Unit Enclosur s .......................................................................................................................................26
Fans .........................................................................................................................................................26
Sound R duction Options ........................................................................................................................26
Vibration Isolation .................................................................................................................................. 26
Unit Nom nclatur and Nam plat
Engin ring Data .................................................................................................................................... 27
Basic Part Number ................................................................................................................................. 27
ptions Section of Part Number ............................................................................................................ 27
SECTION 3 HANDLING AND STORAGE
D liv ry and Storag ...............................................................................................................................29
Insp ction ................................................................................................................................................29
Moving th Chill r ..................................................................................................................................29
Lifting Weights ...................................................................................................................................... 29
Unit Rigging ............................................................................................................................................30
SECTION 4 INSTALLATION
Location R quir m nts ...........................................................................................................................31
Outdoor Installations ..............................................................................................................................31
Indoor Installations .................................................................................................................................31
Location Cl aranc s ...............................................................................................................................31
Installation of Vibration Isolators ..........................................................................................................32
Installation ............................................................................................................................................. 32
Shipping Brac s ......................................................................................................................................32
Pip work Conn ction ..............................................................................................................................32
General Requirements ............................................................................................................................ 32
Wat r Tr atm nt .....................................................................................................................................33
Pip work Arrang m nt ........................................................................................................................... 33
Conn ction Typ s & Siz s ...................................................................................................................... 34
Cool r Conn ctions ................................................................................................................................. 34
ption Flanges ...................................................................................................................................... 34
R frig rant R li f Valv Piping ............................................................................................................. 34
Ductwork Conn ction .............................................................................................................................34
General Requirements ............................................................................................................................ 34
El ctrical Conn ction ..............................................................................................................................35
Pow r Wiring .......................................................................................................................................... 35
Standard Units with Multi Point Pow r Supply Wiring ......................................................................... 35
Units with Single-Point Power Supply Wiring ...................................................................................... 35
115VAC Control Supply Transform r .................................................................................................... 35
Remote Emergency Stop Device ........................................................................................................... 36
Control Pan l Wiring ............................................................................................................................. 36
Volts Fr Contacts .................................................................................................................................36
Chilled Liquid Pump Starter ................................................................................................................... 36
Run Contact .......................................................................................................................................... 36
Alarm Contacts ...................................................................................................................................... 36
Syst m Inputs ..........................................................................................................................................36
Flow Switch ........................................................................................................................................... 36
Remote Run / Stop Switch ..................................................................................................................... 36
Remote Print .......................................................................................................................................... 36
Remote Setpoint ffset  Temperature ................................................................................................. 36

4YORK INTERNATIONAL
FORM 201.18-NM9 (602)
TABLE OF CONTENTS CONTD)
Remote Setpoint ffset  Current ......................................................................................................... 36
Pow r and Control Pan l Layouts (Wy -D lta Typical) .........................................................................37
Options Pan l Layout (Typical) ............................................................................................................... 38
Logic S ction Layout ..............................................................................................................................39
Logic S ction Layout with Control Pan l Layout ..................................................................................40
Custom r Conn ctions ........................................................................................................................... 41
SECTION 5 COMMISSIONING
Pr paration .............................................................................................................................................43
Pr paration  Pow r Off ......................................................................................................................... 43
First Tim Start-up ................................................................................................................................. 45
SECTION 6 OPERATION
G n ral D scription ................................................................................................................................46
Start-up .................................................................................................................................................... 46
Normal Running and Cycling ................................................................................................................. 46
Shutdown .................................................................................................................................................46
SECTION 7 TECHNICAL DATA
Flow Rat and Pr ssur Drop Charts ..................................................................................................... 47
T mp ratur and Flows ...........................................................................................................................50
Physical Data (English Units) ................................................................................................................. 52
Physical Data (SI Units) ..........................................................................................................................53
Op rating Limitations & Sound Pow r Data .........................................................................................55
El ctrical Data (60 Hz) ............................................................................................................................58
Multiple Point Power Supply Connection (60 Hz) ................................................................................. 58
ptional Single-Point Power Supply Connection with Individual System Circuit Breakers (60 Hz) ..... 60
El ctrical Not s (60 Hz) ..........................................................................................................................62
Pow r Conn ction Options (60 Hz) ........................................................................................................63
El ctrical Data (50 Hz) ............................................................................................................................66
Multiple Point Power Supply Connection (50 Hz) ................................................................................. 66
ptional Single-Point Power Supply Connection with Individual System Circuit Breakers (50 Hz) ..... 66
El ctrical Not s (50 Hz) ..........................................................................................................................69
Compressor Data ................................................................................................................................... 69
Fan Data ................................................................................................................................................ 69
Pow r Conn ction Options (50 Hz) ........................................................................................................70
El m ntary Diagram ...............................................................................................................................72
Elementary Diagram  Across-the-Line Start ........................................................................................ 72
Wiring DiagramsAcross-th -Lin Start and Wy -D lta Start ...........................................................74
Standard 3 Compr ssor Pow r Suppli s Wy -D lta Start ..................................................................... 75
Wiring Diagram  Across-th Lin Start ..............................................................................................76
Standard Compr ssor Pow r Suppli s  Across-th Lin Start and Wy -D lta Start .........................78
Conn ction Diagram ............................................................................................................................ 79B
Conn ction Diagram  El ctrical Box .................................................................................................... 84
El m ntary Diagram DXST Dir ct Driv Control Circuit .................................................................... 87
Conn ction Diagram Syst m Wiring  Standard and R mot Evap. Units ...........................................90
El m ntary Diagram DXST Dir ct Driv Pow r Circuit ...................................................................... 92
Wiring Diagram Across-th -Lin Start and Wy -D lta Start ...........................................................94
Standard 4 Compr ssor Pow r Suppli s Wy -D lta Start ..................................................................... 95
Standard Compr ssor Pow r Suppli s  Across-th -Lin Start .............................................................96
Standard Compr ssor Pow r Suppli s ...................................................................................................... 98
Conn ction Diagram Syst ms 1 & 2 ................................................................................................... 99B
Conn ction Diagram Syst ms 3 & 4 ................................................................................................... 102
Conn ction Diagram  El ctrical Box ................................................................................................. 104
El m ntary Diagram DXST Dir ct Driv Control Circuit ................................................................. 106
Conn ction Diagram Syst m Wiring  Standard and R mot Evap. Units ........................................ 109

5
YORK INTERNATIONAL
FORM 201.18-NM9 (602)
TABLE OF CONTENTS CONTD)
Compr ssor T rminal Box  Syst ms 1- 4 ........................................................................................... 111
Dim nsions ........................................................................................................................................... 112
YCAS0218EB - 0268EB (English) (60 Hz) ............................................................................................. 112
YCAS0288EB (English) (60 Hz) ........................................................................................................... 114
YCAS0308EB (English) (60 Hz) ........................................................................................................... 116
YCAS0328EB (English) (60 Hz) ........................................................................................................... 118
YCAS0358EB (English) (60 Hz) ........................................................................................................... 120
YCAS0398EB - 0418EB (English) (60 Hz) ............................................................................................. 122
YCAS0218EB - 0268EB (SI) (60 Hz) ..................................................................................................... 124
YCAS0288EB (SI) (60 Hz) .................................................................................................................... 126
YCAS0308EB (SI) (60 Hz) .................................................................................................................... 128
YCAS0328EB (SI) (60 Hz) .................................................................................................................... 130
YCAS0358EB (SI) (60 Hz) .................................................................................................................... 132
YCAS0398EB - 0418EB (SI) (60 Hz) ..................................................................................................... 134
YCAS0685EB (SI) (50 Hz) .................................................................................................................... 136
YCAS0775EB - 0905EB (SI) (50 Hz) ..................................................................................................... 138
YCAS0965EB (SI) (50 Hz) .................................................................................................................... 140
YCAS1065EB - 1215EB (SI) (50 Hz) ..................................................................................................... 142
Cl aranc s ........................................................................................................................................... 144
W ight Distribution and Isolator Mounting Positions (60 Hz) .......................................................... 145
N opr n Isolator D tails .................................................................................................................... 151
1" Isolator D tails ................................................................................................................................ 152
S ismic Isolator D tails ....................................................................................................................... 153
W ight Distribution and Isolator Mounting Positions (50 Hz) .......................................................... 154
Installation Instructions for VMC S ri s AWR/AWMR and CP R strain d Mountings ................. 156
R frig rant Flow Diagram ................................................................................................................... 157
Proc ss and Instrum ntation Diagram ............................................................................................... 158
Compon nt Locations  3 Compr ssor Units ...................................................................................... 159
Compon nt Locations  4 Compr ssor Units ...................................................................................... 160
Compr ssor Compon nts ..................................................................................................................... 161
Syst m Startup Ch cklist .................................................................................................................... 167
Unit Checks ......................................................................................................................................... 167
Panel Checks ....................................................................................................................................... 168
Initial Start-up ...................................................................................................................................... 169
Ch cking Subcooling and Sup rh at .................................................................................................. 169
Ch cking Economiz r Sup rh at ........................................................................................................ 170
L ak Ch cking .................................................................................................................................... 170
SECTION 8MICRO PANEL CONTENTS ......................................................................................... 171
Chill r Control Pan l Programming and Data Acc ss K ys ................................................. 171
Display and Status Information Keys ....................................................................................... 171
N / FF Rocker Switch ............................................................................................................171
Program & Setup Keys ..............................................................................................................171
1. INTRODUCTION & PHYSICAL DESCRIPTION ................................................................................. 172
1.1 General ....................................................................................................................172
1.2 Keypad & Display .................................................................................................. 172
1.3 Unit (Chiller) n / FF Switch ............................................................................... 173
1.4 Microprocessor Board ...........................................................................................173
1.5 Ancillary Circuit Boards .........................................................................................173
1.6 Circuit Breakers ......................................................................................................174
1.7 Current Transformers (C.T.) ................................................................................... 174
1.8 Transformers .......................................................................................................... 175
1.9 Motor Protector Modules ......................................................................................175

6YORK INTERNATIONAL
FORM 201.18-NM9 (602)
TABLE OF CONTENTS CONTD)
1.10 EMS/BAS Controls ................................................................................................ 177
1.11 Microprocessor Board Layout ............................................................................... 179
1.12 Logic Section Layout ............................................................................................. 180
1.13 Anti-Recycle Timer ................................................................................................181
1.14 Anti-Coincidence Timer .........................................................................................181
1.15 Evaporator Pump Control .......................................................................................181
1.16 Compressor Heater Control ....................................................................................181
1.17 Evaporator Heater Control .....................................................................................181
1.18 Pumpdown (LLSV) Control ....................................................................................181
1.19 Alarms ....................................................................................................................181
1.20 Run Status (Chiller) ................................................................................................182
1.21 Lead / Lag Compressor Selection ...........................................................................182
1.22 3 or 4 Compressor Chiller Configuration ................................................................182
2. STATUS KEY: GENERAL STATUS MESSAGES AND FAULT WARNINGS ........................................ 183
2.1 General ....................................................................................................................183
2.2 General Status Messages .......................................................................................183
2.3 Unit Warnings ........................................................................................................184
2.4 Anticipation Control Status Messages ..................................................................185
2.5 Unit Fault Status Messages ................................................................................... 186
2.6 System Fault (Safety) Status Messages ................................................................187
2.7 Printout on Fault Shutdown ...................................................................................190
3. DISPLAY KEYS & OPTION SWITCHES ........................................................................................... 191
3.1 General ....................................................................................................................191
3.2 Chilled Liquid Temps Key ...................................................................................... 191
3.3 System # Data Keys ............................................................................................... 192
3.4 Ambient Temp Key ................................................................................................192
3.5 Motor Current Key ................................................................................................. 192
3.6 perating HRS / Start Counter Key ....................................................................... 193
3.7 ptions Key & Dip Switch Settings ...................................................................... 193
3.8 Function Key ......................................................................................................... 195
4. PRINT KEYS ............................................................................................................................... 196
4.1 General ....................................................................................................................196
4.2 per Data Key ........................................................................................................ 196
4.3 perating Data  Local Display Messages ............................................................ 196
4.4 perating Data  Remote Printout .........................................................................197
4.5 History Key ............................................................................................................ 199
4.6 Fault History Data  Local Display Messages ......................................................199
4.7 Fault History Data  Remote Printout .................................................................... 202
5. ENTRY KEYS ............................................................................................................................... 203
5.1 General ....................................................................................................................203
5.2 Numerical Keypad ..................................................................................................203
5.3 Enter Key ............................................................................................................... 203
5.4 Cancel Key .............................................................................................................203
5.5 á â Keys ......................................................................................................... 203
6. SETPOINTS KEYS & CHILLED LIQUID CONTROL .......................................................................... 204
6.1 General ....................................................................................................................204
6.2 Chilled Liquid Temperature Control ....................................................................... 204
6.3 Local Cooling Setpoints Key .................................................................................207
6.4 Remote Cooling Setpoints Key ............................................................................. 207

7
YORK INTERNATIONAL
FORM 201.18-NM9 (602)
LIST OF FIGURES
Fig. 1  Component Locations ................................................................................................................................ 14
Fig. 2  Screw Compressor ...................................................................................................................................... 15
Fig. 3  Unit Rigging ................................................................................................................................................ 30
Fig. 4  Lifting Lugs ................................................................................................................................................. 30
Fig. 5  Pipewor Arrangement ............................................................................................................................... 33
Fig. 6  Victaulic Groove .......................................................................................................................................... 34
Fig. 7  Flange Attachments .................................................................................................................................... 34
Fig. 8  Power Panel Section ................................................................................................................................... 37
Fig. 9  Options Panel Layout (Typical) ................................................................................................................ 38
Fig. 10  Logic Section Layout .................................................................................................................................. 39
Fig. 11  Logic Section Layout with Control Panel Layout ..................................................................................... 40
Fig. 12  Customer Connections ............................................................................................................................... 41
Fig. 13  Customer Connections ............................................................................................................................... 42
Fig. 14  Flow Rate and Pressure Drop (English Units, 60 Hz) .............................................................................. 47
Fig. 15  Flow Rate and Pressure Drop (SI Units, 60 Hz) ....................................................................................... 47
Fig. 16  Flow Rate and Pressure Drop (SI Units, 50 Hz) ....................................................................................... 48
Fig. 17  Glycol Correction Factors .......................................................................................................................... 49
Fig. 18  Multiple Point Power Supply Connection ................................................................................................ 63
Fig. 19  Multiple Point Power Supply Connection with Individual System Circuit Brea ers ............................. 63
Fig. 20  Optional Single-Point Power Supply Connection with Individual System Circuit Brea ers .................. 64
SECTION 9MAINTENANCE ............................................................................................................. 222
G n ral R quir m nts ........................................................................................................................... 222
Daily Maintenance ................................................................................................................................... 222
Scheduled Maintenance .......................................................................................................................... 222
Chill r/Compr ssor Op rating Log ..................................................................................................... 222
Compr ssor Unit Op ration .................................................................................................................. 223
Maint nanc R quir m nts ................................................................................................................... 224
G n ral P riodic Maint nanc Ch cks  Standard Units .................................................................... 225
SECTION 10 SPARE PARTS ............................................................................................................... 226
Recommended Spares .............................................................................................................................. 226
Recommended Compressor ils ..............................................................................................................226
Associated Drawings ..............................................................................................................................226
SECTION 11 TROUBLESHOOTING .................................................................................................. 227
Comp t nt P rsons Troubl shooting Guid .......................................................................................... 227
S nsor Calibration Charts .................................................................................................................... 229
Limit d Warranty Appli d Syst ms ....................................................................................................... 230
T mp ratur Conv rsion Chart ............................................................................................................. 231
7. CLOCK KEYS ............................................................................................................................... 208
7.1 General ....................................................................................................................208
7.2 Set Time Key ..........................................................................................................208
7.3 Set Schedule / Holiday Key ................................................................................... 209
7.4 Manual verride Key ............................................................................................. 210
8. PROGRAM KEY ............................................................................................................................... 211
8.1 General ....................................................................................................................211
8.2 Program Key  User Programmable Values ............................................................211
8.3 Programming Default Values ..............................................................................215
8.4 3 Compressor Condenser Fan Control ................................................................... 216
8.5 4 Compressor Condenser Fan Control ................................................................... 219

8YORK INTERNATIONAL
FORM 201.18-NM9 (602)
LIST OF FIGURES CONTD)
Fig. 21  Multiple Point Power Supply Connection (50 Hz) .................................................................................. 70
Fig. 22  Multiple Point Power Supply Connection with Individual System Circuit Brea ers ............................. 70
Fig. 23  Optional Single-Point Power Supply Connection with Individual System Circuit Brea ers .................. 71
Fig. 24  Elementary Diagram  Across-The-Line Start .......................................................................................... 72
Fig. 25  Control Power Transformer Kit ................................................................................................................. 74
Fig. 26  Standard 3-Compressor Power Supplies  Wye-Delta Start ..................................................................... 75
Fig. 27  Elementary Diagram  Across-The-Line Start ........................................................................................... 76
Fig. 28  Elementary Diagram ................................................................................................................................... 78
Fig. 29  Connection Diagram ................................................................................................................................ 79B
Fig. 30  Connection Diagram  Electric Box DXST Direct Drive .......................................................................... 84
Fig. 31  Connection Diagram  Electrical Box ......................................................................................................... 85
Fig. 32  Elementary Diagram  DXST Direct Drive - Control Circuit ................................................................... 87
Fig. 33  Connection Diagram System Wiring .......................................................................................................... 90
Fig. 34  Elementary Diagram  DXST Direct Drive  Power Circuit .................................................................... 92
Fig. 35  Control Power Transformer Kit ................................................................................................................. 94
Fig. 36  Standard 4-Compressor Power Supplies  Wye-Delta Start ..................................................................... 95
Fig. 37  Standard Compressor Power Supplies  Across-The-Line Start .............................................................. 96
Fig. 38  Standard Compressor Power Supplies  Across-The-Line and Wye-Delta Start ..................................... 98
Fig. 39  Connection Diagram  Across-The-Line and Wye-Delta Start, Systems 1 & 2 .................................... 99B
Fig. 40  Connection Diagram  Across-The-Line and Wye-Delta Start, Systems 3 & 4 ..................................... 102
Fig. 41  Connection Diagram  Electrical Box ....................................................................................................... 104
Fig. 42  Elementary Diagram, DXST Direct Drive  Control Circuit .................................................................. 106
Fig. 43  Connection Diagram System Wiring  Standard and Remote Evap. Units ............................................. 109
Fig. 44  Compressor Terminal Box, Systems 1  4 ............................................................................................... 111
Fig. 45  Model YCAS0218EB  0268EB Dimensions (English) .......................................................................... 112
Fig. 46  Model YCAS0288EB Dimensions (English) ........................................................................................... 114
Fig. 47  Model YCAS0308EB Dimensions (English) ........................................................................................... 116
Fig. 48  Model YCAS0328EB Dimensions (English) ........................................................................................... 118
Fig. 49  Model YCAS0358EB Dimensions (English) ........................................................................................... 120
Fig. 50  Model YCAS0398EB  0418EB Dimensions (English) .......................................................................... 122
Fig. 51  Model YCAS0218EB  0268EB Dimensions (SI) .................................................................................. 124
Fig. 52  Model YCAS0288EB Dimensions (SI) .................................................................................................... 126
Fig. 53  Model YCAS0308EB Dimensions (SI) .................................................................................................... 128
Fig. 54  Model YCAS0328EB Dimensions (SI) .................................................................................................... 130
Fig. 55  Model YCAS0358EB Dimensions (SI) .................................................................................................... 132
Fig. 56  Model YCAS0368EB  0418EB Dimensions (SI) .................................................................................. 134
Fig. 57  Model YCAS0685EB Dimensions (SI) .................................................................................................... 136
Fig. 58  Model YCAS0775EB  0905EB Dimensions (SI) .................................................................................. 138
Fig. 59  Model YCAS0965EB Dimensions (SI) .................................................................................................... 140
Fig. 60  Model YCAS1065EB  1215EB Dimensions (SI) .................................................................................. 142
Fig. 61  Clearances ................................................................................................................................................. 144
Fig. 62  Neoprene Isolator Details ......................................................................................................................... 151
Fig. 63  1" Isolator Details ..................................................................................................................................... 152
Fig. 64  Seismic Isolator Details ............................................................................................................................ 153
Fig. 65  Refrigerant Flow Diagram ......................................................................................................................... 157
Fig. 66  Process and Instrumentation Diagram ...................................................................................................... 158
Fig. 67  Component Locations  3-Compressor Units ......................................................................................... 159
Fig. 68  Component Locations  4-Compressor Units ......................................................................................... 160
Fig. 69  Compressor Components ......................................................................................................................... 161
Fig. 70  Motor Protector ........................................................................................................................................ 176
Fig. 71  Component Layout ................................................................................................................................... 179
Fig. 72  Logic Section Layout ................................................................................................................................ 180
Fig. 73  Suction Pressure Cutout ........................................................................................................................... 188
Fig. 74  Enlarged Photograph of Dip Switches on Microprocessor Board .......................................................... 194
Fig. 75  Condenser Fan Control Layout for DXST Compressor Units ............................................................... 216
Fig. 76  Condenser Fan Control Layout for DXST Compressor Units ............................................................... 219

9
YORK INTERNATIONAL
FORM 201.18-NM9 (602)
Table 1  Motor Protector Dip Switch Setting  Across-The-Line Start, 60 Hz ..................................................... 20
Table 2  Motor Protector Dip Switch Setting  Across-The-Line Start, 50 Hz ..................................................... 21
Table 3  Motor Protector Dip Switch Setting  Wye-Delta Start, 60 Hz ............................................................... 22
Table 4  Motor Protector Dip Switch Setting  Wye-Delta Start, 50 Hz ............................................................... 23
Table 5  Temperatures and Flows  English Units, 60 Hz ...................................................................................... 50
Table 6  Temperatures and Flows  SI Units, 60 Hz .............................................................................................. 50
Table 7  Temperatures and Flows  SI Units, 50 Hz .............................................................................................. 51
Table 8  Physical Data  English Units, 60 Hz, R-407c Optimized ....................................................................... 52
Table 9  Physical Data  SI Units, 60 Hz, R-407c Optimized ............................................................................... 53
Table 10  Physical Data  SI, 50 Hz, R-407c Optimized .......................................................................................... 54
Table 11  Operating Limitations  English Units 60 Hz ........................................................................................... 55
Table 12  60 Hz Sound Power Data ........................................................................................................................... 55
Table 13  Operating Limitations  SI Units 60 Hz .................................................................................................... 56
Table 14  60 Hz Sound Power Data ........................................................................................................................... 56
Table 15  Operating Limitations  SI Units 50 Hz .................................................................................................... 57
Table 16  50 Hz Sound Power Data ........................................................................................................................... 57
Table 17  Multiple Point Power Supply Connection  3 & 4 Compressor Units ................................................... 58
Table 18  Optional Single-Point Power Supply Connection with Individual System Circuit Brea ers 
3 & 4 Compressor Units ............................................................................................................................ 60
Table 19  Control Power Supply (Units without Standard Control Circuit Transformers) .................................... 60
Table 20  Control Power Supply (Units with Standard Control Circuit Transformers) .......................................... 61
Table 21  Multiple Point Power Supply Connection  3 & 4 Compressor Units (50 Hz) ..................................... 66
Table 22  Optional Single-Point Power Supply Connection with Individual System Circuit Brea ers 
3 & 4 Compressor Units ............................................................................................................................ 66
Table 23  Control Power Supply (Units without Standard Control Circuit Transformers) .................................... 68
Table 24  Control Power Supply (Units with Standard Control Circuit Transformers) .......................................... 68
Table 25  Compressor Data ........................................................................................................................................ 69
Table 26  Fan Data (-46) ............................................................................................................................................. 69
Table 27  Aluminum Fin Weight Distribution (lbs.) ................................................................................................ 145
Table 28  Aluminum Fin Weight Distribution ( gs.) ............................................................................................... 145
Table 29  Aluminum Fins  Neoprene Mount Selection - VMC Type RD-X ....................................................... 146
Table 30  Aluminum Fins  1" Isolator Selection - VMC Type CP-X-XX ............................................................ 146
Table 31  Aluminum Fins  Seismic Isolator Selections - VMC Model # AWMR-X-XXX .................................. 146
Table 32  Copper Fin Weight Distribution (lbs.) ..................................................................................................... 147
Table 33  Copper Fin Weight Distribution ( gs.) .................................................................................................... 147
Table 34  Copper Fins  Neoprene Mount Selection - VMC Type RD-X ............................................................ 147
Table 35  Copper Fins  1" Isolator Selection - VMC Type CP-X-XX ................................................................ 147
Table 36  Copper Fins  Seismic Isolator Selections - VMC Model # AWMR-X-XXX ...................................... 147
Table 37  Copper Fin w/ Optional Silencer Kit Weight Distribution (lbs.) ............................................................ 147
Table 38  Copper Fin w/ Optional Silencer Kit Weight Distribution ( gs.) ........................................................... 147
Table 39  Copper Fins w/ Optional Silencer Kit  Neoprene Mount Selection - VMC Type RD-X ................... 147
Table 40  Copper Fins w/ Optional Silencer Kit  1" Isolator Selection - VMC Type CP-X-XX ........................ 147
Table 41  Copper Fins w/ Optional Silencer Kit  Seismic Isolator Selections -
VMC Model # AWMR-X-XXX .............................................................................................................. 147
Table 42  Aluminum Fins Weight Distribution ( gs.) by Model ............................................................................ 154
Table 43  Aluminum Fins, Seismic Isolator Selections  VMC Type RD-4 ........................................................... 154
Table 44  Aluminum Fins, 1" Isolator Selections - VMC Type CP-2-XX ............................................................. 154
Table 45  Aluminum Fins, Seismic Isolator Selections - VMC Model # AWMR-X-XXX .................................... 154
Table 46  Copper Fins Weight Distribution ( gs.) by Model ................................................................................. 155
Table 47  Copper Fins, Seismic Isolator Selections  VMC Type RD-4 ............................................................... 155
Table 48  Copper Fins, 1" Isolator Selections - VMC Type CP-2-XX .................................................................. 155
Table 49  Copper Fins, Seismic Isolator Selections - VMC Model # AWMR-X-XXX ........................................ 155
Table 50  Condenser Fan Control and Fan Contactor Data for DXST Units with 3 Fans/System ....................... 217
Table 51  Condenser Fan Control and Fan Contactor Data for DXST Units with 4 Fans/System ....................... 217
Table 52  Condenser Fan Control and Fan Contactor Data for DXST Units with 5 Fans/System ....................... 218
Table 53  Condenser Fan Control and Fan Conatctor Data for DXST Units with 6 Fans/System ....................... 218
Table 54  Condenser Fan Control and Fan Contactor Data for DXST Units with 4 Fans/System ....................... 220
Table 55  Condenser Fan Control and Fan Contactor Data for DXST Units with 5 Fans/System ....................... 221
Table 56  Maintenance requirements for YORK YCAS Screw Chillers ................................................................. 224
Table 57  General Periodic Maintenance Chec s for Standard Units ...................................................................... 225
Table 58  Competent Persons Troubleshooting Guide ........................................................................................... 227
LIST OF TABLES

10 YORK INTERNATIONAL
FORM 201.18-NM9 (602)
This equipment is a relatively complicated apparatus.
During installation, operation, maintenance or service,
individuals may be exposed to certain components or
conditions including, but not limited to: re rigerants,
oils, materials under pressure, rotating components, and
both high and low voltage. Each o these items has the
potential, i misused or handled improperly, to cause
bodily injury or death. It is the obligation and responsi-
bility o operating/service personnel to identi y and rec-
ognize these inherent hazards, protect themselves, and
proceed sa ely in completing their tasks. Failure to com-
ply with any o these requirements could result in seri-
ous damage to the equipment and the property in which
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
it is situated, as well as severe personal injury or death
to themselves and people at the site.
This document is intended or use by owner-authorized
operating/service personnel. It is expected that this in-
dividual possesses independent training that will enable
them to per orm their assigned tasks properly and sa ely.
It is essential that, prior to per orming any task on this
equipment, this individual shall have read and under-
stood this document and any re erenced materials. This
individual shall also be amiliar with and comply with
all applicable governmental standards and regulations
pertaining to the task in question.
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
CAUTION identifies a hazard which
could lead to damage to the machine,
damage to other equipment and/or en-
ironmental pollution. Usually an in-
struction will be gi en, together with a
brief explanation.
NOTE is used to highlight additional
information which may be helpful to
you.
DANGER indicates an imminently
hazardous situation which, if not
a oided, will result in death or seri-
ous injury.
WARNING indicates a potentially haz-
ardous situation which, if not a oided,
could result in death or serious injury.
External wiring, unless specified as an optional connection in the manufacturers product
line, is NOT to be connected inside the micro panel cabinet. De ices such as relays, switches,
transducers and controls may NOT be installed inside the micro panel. NO external wiring
is allowed to be run through the micro panel. All wiring must be in accordance with YORKs
published specifications and must be performed ONLY by qualified YORK personnel. YORK
will not be responsible for damages/problems resulting from improper connections to the
controls or application of improper control signals. Failure to follow this will oid the
manufacturers warranty and cause serious damage to property or injury to persons.