York YCAS0250 Quick start guide

WIRING DIAGRAM
AIR-COOLED SCREW LIQUID CHILLERS
New Release Form 201.19-W2 (304)
YCAS AIR-COOLED LIQUID CHILLERS
YCAS0250 THROUGH YCAS0330 (3 COMPRESSOR)
YCAS0360 THROUGH YCAS0440 (4 COMPRESSOR)
STYLE G
(60 Hz)
00258VIP

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FORM 201.19-W2 (304)
PAGE
TABLE OF CONTENTS
NOMENCLATURE .......................................................................................................................... 4
ELECTRICAL NOTES .................................................................................................................... 6
ELECTRICAL DATA ....................................................................................................................... 8
MULTIPLE POINT POWER SUPPLY CONNECTION - 3 & 4 COMPRESSOR UNITS ...................................................8
OPTIONAL SINGLE-POINT POWER SUPPLY CONNECTION WITH INDIVIDUAL UNIT CIRCUIT BREAKERS........ 10
3 & 4 COMPRESSOR UNITS ........................................................................................................................................10
ELEMENTARY WIRING DIAGRAM YCAS0250 - YCAS0330 (3 COMPRESSOR) ..................... 12
ACROSS-THE-LINE START........................................................................................................ 13
ELEMENTARY WIRING DIAGRAM YCAS0250 - YCAS0330 (3 COMPRESSOR)
WYE DELTA START .................................................................................................................... 14
ELEMENTARY DIAGRAM DXST STARTER CONTROL CIRCUIT ............................................. 25
CONNECTION DIAGRAM SYSTEM WIRING ............................................................................. 27
ELEMENTARY WIRING DIAGRAM YCAS0360 - YCAS0440 (4 COMPRESSOR) ..................... 29
ELEMENTARY WIRING DIAGRAM YCAS0360 - YCAS0440 (4 COMPRESSOR)
ACROSS-THE-LINE START......................................................................................................... 30
ELEMENTARY WIRING DIAGRAM YCAS0360 - YCAS0440 (4 COMPRESSOR)
WYE DELTA START ..................................................................................................................... 31
CONNECTION WIRING DIAGRAM.............................................................................................. 36
ELEMENTARY DIAGRAM DXST STARTER CONTROL CIRCUIT ............................................. 44
ELEMENTARY DIAGRAM DXST FAN CONTROL CIRCUIT....................................................... 45
CONNECTION DIAGRAM SYSTEM WIRING STANDARD AND REMOTE EVAP UNITS.......... 46
COMPRESSOR TERMINAL BOX SYSTEM 1 THROUGH 4 ....................................................... 48

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FORM 201.19-W2 (304)
LIST OF FIGURES
FIG. 1 – WIRING DIAGRAM – DXST DIRECT DRIVE................................................................. 12
FIG. 2 – WIRING DIAGRAM – ACROSS-THE-LINE START ....................................................... 13
FIG. 3 – WIRING DIAGRAM – WYE DELTA START.................................................................... 14
FIG. 4 – CONTROL POWER TRANSFORMER KIT .................................................................... 15
FIG. 5 – ELEMENTARY WIRING DIAGRAM................................................................................ 16
FIG. 6 – CONNECTION DIAGRAM 3 COMPRESSOR ................................................................ 18
FIG. 7 – CONNECTION DIAGRAM 3 COMPRESSOR ................................................................ 19
FIG. 8 – CONNECTION DIAGRAM 3 COMPRESSOR ................................................................ 20
FIG. 9 – CONNECTION DIAGRAM 3 COMPRESSOR ................................................................ 22
FIG. 10 – CONNECTION DIAGRAM 3 COMPRESSOR .............................................................. 23
FIG. 11 – CONNECTION DIAGRAM 3 COMPRESSOR .............................................................. 24
FIG. 12 – ELEMENTARY DIAGRAM 3 COMPRESSOR STARTER CONTROL CIRCUIT.......... 25
FIG. 13 – ELEMENTARY DIAGRAM DXST FAN CONTROL - 3 COMPRESSOR ...................... 26
FIG. 14 – CONNECTION DIAGRAM SYSTEM WIRING 3 COMPRESSOR................................ 27
FIG. 15 – CONNECTION DIAGRAM STSTEM WIRING - 3 COMPRESSOR............................. 28
FIG. 16 – ELEMENTARY WIRING DIAGRAM - 4 COMPRESSOR ............................................. 29
FIG. 17 – ELEMENTARY WIRING DIAGRAM - ACROSS-THE-LINE START ............................ 30
FIG. 18 – ELEMENTARY WIRING DIAGRAM - WYE DELTA...................................................... 31
FIG. 19 – CONTROL POWER TRANSFORMER KIT .................................................................. 32
FIG. 20 – ELEMENTARY WIRING DIAGRAM.............................................................................. 34
FIG. 21 – CONNECTION DIAGRAM 4 COMPRESSOR .............................................................. 36
FIG. 22 – CONNECTION DIAGRAM 4 COMPRESSOR .............................................................. 37
FIG. 23 – CONNECTION WIRING DIAGRAM.............................................................................. 38
FIG. 24 – CONNECTION WIRING DIAGRAM.............................................................................. 39
FIG. 25 – CONNECTION DIAGRAM 4 COMPRESSOR .............................................................. 40
FIG. 26 – CONNECTION DIAGRAM 4 COMPRESSOR .............................................................. 41
FIG. 27 – CONNECTION DIAGRAM 4 COMPRESSOR .............................................................. 42
FIG. 28 – CONNECTION DIAGRAM 4 COMPRESSOR .............................................................. 43
FIG. 29 – ELEMENTARY DIAGRAM - DXST STARTER CONTROL CIRCUIT ........................... 44
FIG. 30 – ELEMENTARY DIAGRAM - DXST FAN CONTROL CIRCUIT..................................... 45
FIG. 31 – CONNECTION DIAGRAM SYSTEM WIRING.............................................................. 46
FIG. 32 – CONNECTION DIAGRAM SYSTEM WIRING.............................................................. 47
FIG. 33 – COMPRESSOR TERMINAL BOX, SYSTEM 1-4 ........................................................ 48
PAGE

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FORM 201.19-W2 (304)
WARNING
HIGH VOLTAGE
is used in the operation of this equipment.
DEATH OR SERIOUS INJURY
may result if personnel fail to observe safety precautions.
Work on electronic equipment should not be undertaken unless the individual(s) have been trained
in the proper maintenance of equipment and is (are) familiar with its potential hazards.
Shut off power supply to equipment before beginning work and follow lockout procedures. When
working inside equipment with power off, take care to discharge every capacitor likely to hold dan-
gerous potential.
Be careful not to contact high voltage connections when installing or operating this equipment.
LOW VOLTAGE
DO NOT be misled by the term “low voltage”.
Voltages as low as 50 volts may cause death.
NOMENCLATURE
The Model Number denotes the following characteristics of the unit:
YORK Chiller
YC = YORK Chiller
Air-Cooled
Compressor Type
S = Screw
Nominal Capacity (tons)
Unit Designator
S = Standard Unit
E = High Efficiency
H = High Static Fans
Design Series
Type Start
Y = Star (WYE)-Delta
X = Across-the-Line
Voltage Code
17 = 200-3-60
28 = 230-3-60
40 = 380-3-60
46 = 460-3-60
58 = 575-3-60
Refrigerant
C = R-22
YC A S 0330 E C 17 Y G

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FORM 201.19-W2 (304)
ELECTRICAL NOTES
NOTES & LEGEND
LEGEND
ACR-LINE ACROSS THE LINE START
C.B. CIRCUIT BREAKER
D.E. DUAL ELEMENT FUSE
DISC SW DISCONNECT SWITCH
FACT CB FACTORY-MOUNTED CIRCUIT BREAKER
FLA FULL LOAD AMPS
HZ HERTZ
MAX MAXIMUM
MCA MINIMUM CIRCUIT AMPACITY
MIN MINIMUM
MIN NF MINIMUM NON-FUSED
RLA RUNNING LOAD AMPS
S.P. WIRE SINGLE-POINT WIRING
Y-∆WYE-DELTA START
X-LRA ACROSS-THE-LINE INRUSH LOCKED ROTOR AMPS
Y-LRA WYE-DELTA INRUSH LOCKED ROTOR AMPS
VOLTAGE CODE
-17 = 200-3-60
-28 = 230-3-60
-40 = 380-3-60
-46 = 460-3-60
-58 = 575-3-60
NOTES:
1. Minimum circuit ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit, per N.E.C. Article 430-24. If a Factory Mounted Control Transformer
is provided, add the following to the system #1 MCA values in the YCAS Tables: -17, add 15 amps; -28, add 12 amps; -40,
add 7 amps; -46, add 6 amps; -58, add 5 amps.
2. The recommended disconnect switch is based on a minimum of 115% of the summation rated load amps of all the loads
included in the circuit, per N.E.C. 440 - 12A1.
3. Minimum recommended fuse size is based on 150% of the largest motor RLA plus 100% of the remaining RLAs. Minimum
fuse rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).
4. Maximum dual element fuse size is based on 225% maximum plus 100% of the rated load amps for all other loads included
in the circuit, per N.E.C. 440-22. Maximum fuse rating = (2.25 x largest compressor RLA) + other compressor RLAs +
(# fans x each fan motor FLA).
5. Minimum recommended circuit breaker is 150% maximum plus 100% of rated load amps included in the circuit. Minimum
circuit breaker rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).
6. Maximum circuit breaker is based on 225% maximum plus 100% of the rated load amps for all loads included in the circuit,
per circuit, per U.L. 1995 Fig. 36.2. Maximum circuit breaker rating = (2.25 x largest compressor RLA) + other compressor
RLAs + ( # fans x each fan motor FLA).
7. The Incoming Wire Range is the minimum and maximum wire size that can be accommodated by unit wiring lugs. The (1),
(2), or (3) indicate the number of termination points or lugs which are available per phase. 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 Electric Code and using copper conductors 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 is #6 - 350 MCM.
9. The field supplied disconnect is a “Disconnecting Means” as defined in N.E.C. 100.B, and is intended for isolating the unit
from the available power supply to perform maintenance and troubleshooting. This disconnect is not intended to be a Load
Break Device.
10. Two-Compressor machines with single-point power connection, and equipped with Star (Wye)-Delta Compressor motor start
must also include factory-provided individual system circuit breakers in each motor control center. All 3 & 4 Compressor
machines equipped with Star-Delta compressor motor start must also include factory-provided individual system circuit
breakers in each motor control center.
11. Consult factory for Electrical Data on units equipped with “High Static Fan” option. High Static Fans are 3.8 kW each.
12. FLA for “Low Noise Fan” motors: 200V = 8.0A, 230V = 7.8A, 380V = 4.4A, 460V = 3.6A, 575V = 2.9A.
13. Group Rated breaker must be HACR type for cU.L. Machines.

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FORM 201.19-W2 (304)
ELECTRICAL DATA
TABLE 1 – COMPRESSOR DATA
MAXIMUM kW AND AMPERAGE VALUES FOR DXST COMPRESSORS
COMPRESSOR MODEL AND VOLTAGE CODE
DXS45LA – MOTOR CODE A DXS36LA – MOTOR CODE A DXS24LA – MOTOR CODE (TBD)
(B5N, B5E, B6N, B6E) (A5N, A5E, A6N, A6E) (C5N, C5E, C6N, C6E)
VOLTAGE CODE- -17 -28 -40 -46 -50 -58 -17 -28 -40 -46 -50 -58 -17 -28 -40 -46 -50 -56
MAX kW 150 150 150 150 113 150 150 150 150 150 113 150 105 105 105 105 80 105
MAX AMPS 492 428 259 214 193 171 492 428 259 214 193 171 338 294 178 147 135 118
CONTROL POWER SUPPLY (UNITS WITHOUT STANDARD CONTROL CIRCUIT TRANSFORMER)
NO. OF COMPRESSORS CONTROL POWER
SUPPLY
MCA (MAX LOAD
CURRENT)
MAX DUAL ELEMENT
FUSE SIZE
NON-FUSED
DISCONNECT
SWITCH SIZE
3 or 4 (Non-CE 50/60Hz) 115V-1Ø 30A 30A 30A
CONTROL POWER SUPPLY (UNITS WITH STANDARD CONTROL CIRCUIT TRANSFORMER)
NO. OF COMPRESSORS CONTROL POWER
SUPPLY
MCA (MAX LOAD
CURRENT)
RECOMMENDED
DUAL ELEMENT FUSE
SIZE
NON-FUSED
DISCONNECT
SWITCH SIZE
3 or 4 380V - 60 HZ 460V -
60 HZ 575V - 60 HZ 9.9A 8.2A 6.5A 30A 15A 15A — — —

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FORM 201.19-W2 (304)
ELECTRICAL DATA
MULTIPLE POINT POWER SUPPLY CONNECTION
Two field provided power supply circuits to the unit.
Field Power Wiring connections to factory provided,
Non-Fused Disconnect Switches (Opt), or Terminal
Blocks (Opt) in the Option Box.
Suitable for:
Across-The-Line-Start
See page 6 for Electrical Data footnotes.
See page 6 for notes.
MULTIPLE POINT POWER SUPPLY CONNECTION - 3 & 4 COMPRESSOR UNITS
(Two Field Provided Power Supply Circuits to the Chiller. Field Connections to Factory provided Terminal Block (Std)
or Disconnects (Opt) in the Options Panel.
ELECTRICAL SYSTEM #1 FIELD SUPPLIED WIRING
CHILLER FIELD PROVIDED POWER SUPPLY FACTORY PROVIDED (LUGS) COMPRESSOR #1 COMPRESSOR #3 FAN11, 12
MODEL DATA
YCAS VOLTS MCA1MIN NF PROTECTION STANDARD OPTIONAL NF RLA Y-∆LRA X-LRA RLA Y-∆LRA X-LRA QTYFLA(EA) LRA(EA)
DISC SW2, 9 MIN.3, 5 MAX.4, 6 TERMINAL BLOCK DISC. SWITCH
380 387 400 450 500 (2) # 2-300 (2) 3/0-250 155 343 1,093 155 343 1,093 8 4.8 23.0
0250EC 460 320 400 400 400 (1)2/0-(2)4/0 (2) 3/0-250 128 280 893 128 280 893 8 4.0 19.0
575 257 400 300 350 (1)2/0-(2)4/0 (2) 3/0-250 103 224 714 103 224 714 8 3.1 15.2
380 477 600 600 700 (2) # 2-300 (2) 250-500 155 343 1,093 227 343 1,093 8 4.8 23.0
0270EC 460 390 400 450 500 (2) # 2-300 (2) 3/0-250 128 280 893 184 280 893 8 4.0 19.0
575 312 400 350 450 (1)2/0-(2)4/0 (2) 3/0-250 103 224 714 147 224 714 8 3.1 15.2
380 473 600 600 600 (2) # 2-300 (2) 250-500 181 343 1,093 199 343 1,093 9 4.8 23.0
0300EC 460 390 400 450 500 (2) # 2-300 (2) 3/0-250 149 280 893 164 280 893 9 4.0 19.0
575 311 400 350 400 (1)2/0-(2)4/0 (2) 3/0-250 119 224 714 131 224 714 9 3.1 15.2
380 524 600 600 700 (2)2/0-500 (2) 250-500 197 343 1,093 227 343 1,093 9 4.8 23.0
0330EC 460 429 600 500 600 (2) # 2-300 (2) 250-500 163 280 893 184 280 893 9 4.0 19.0
575 342 400 400 500 (1)2/0-(2)4/0 (2) 3/0-250 130 224 714 147 224 714 9 3.1 15.2
380 442 600 500 600 (2) # 2-300 (2) 250-500 199 343 1,093 155 343 1,093 8 4.8 23.0
0360EC 460 365 400 450 500 (1)2/0-(2)4/0 (2) 3/0-250 164 280 893 128 280 893 8 4.0 19.0
575 292 400 350 400 2/0 -500 (2) 3/0-250 131 224 714 103 224 714 8 3.1 15.2
380 473 600 600 600 (2) # 2-300 (2) 250-500 181 343 1,093 199 343 1,093 9 4.8 23.0
0400EC 460 390 400 450 500 (2) # 2-300 (2) 3/0-250 149 280 893 164 280 893 9 4.0 19.0
575 311 400 350 400 2/0-500 (2) 3/0-250 119 224 714 131 224 714 9 3.1 15.2
380 524 600 600 700 (2)2/0-500 (2) 250-500 197 343 1,093 227 343 1,093 9 4.8 23.0
0440EC 460 429 600 500 600 (2) # 2-300 (2) 250-500 163 280 893 184 280 893 9 4.0 19.0
575 342 400 400 450 (1)2/0-(2)4/0 (2) 3/0-250 130 224 714 147 224 714 9 3.1 15.2
WIRE RANGE7
OVER-CURRENT
LD05555
TB
or
DS
TB
or
DS
TB
1
TB
2
TB
3
TB
4
Field Supply #2
Field Supply #1
Suitable for:
Across the Line Start
See Note 3
Control Power Wiring As Shown On
The Two Compressor Diagrams

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FORM 201.19-W2 (304)
ELECTRICAL DATA (CONT'D)
ELECTRICAL SYSTEM #2 FIELD SUPPLIED WIRING
CHILLER FIELD PROVIDED POWER SUPPLY FACTORY PROVIDED (LUGS) COMPRESSOR #2 COMPRESSOR #4 FAN11, 12
MODEL DATA
YCAS VOLTS MCA1 MIN NF PROTECTION13 STANDARD OPTIONAL NF RLA Y-∆LRA X-LRA RLA Y-∆LRA X-LRA QTY FLA(EA) LRA(EA)
DISC SW2,9
MIN.3, 5 MAX.4, 6 TERMINAL BLOCK DISC. SWITCH
380 213 200 300 350 # 2-300 # 4-300 155 343 1,093 — — — 4 4.8 23.0
0250EC 460 176 175 225 300 # 2-4/0 # 4-300 128 280 893 — — — 4 4.0 19.0
575 141 150 175 225 # 2-4/0 # 4-300 103 224 714 — — — 4 3.1 15.2
380 213 200 300 350 # 2-300 # 4-300 155 343 1,093 — — — 4 4.8 23.0
0270EC 460 176 175 225 300 # 2-4/0 # 4-300 128 280 893 — — — 4 4.0 19.0
575 141 150 175 225 # 2-4/0 # 4-300 103 224 714 — — — 4 3.1 15.2
380 250 250 300 400 # 2-300 # 6-350 181 343 1,093 — — — 5 4.8 23.0
0300EC 460 206 200 250 350 # 2-300 # 4-300 149 280 893 — — — 5 4.0 19.0
575 164 175 200 250 # 2-4/0 # 6-350 119 224 714 — — — 5 3.1 15.2
380 270 400 350 450 2/0-500 (2) 3/0-250 197 343 1,093 — — — 5 4.8 23.0
0330EC 460 224 225 300 350 # 2-300 # 4-300 163 280 893 — — — 5 4.0 19.0
575 178 175 225 300 # 2-4/0 # 6-350 130 224 714 — — — 5 3.1 15.2
380 442 600 500 600 (2) 2-300 (2) 250-500 199 343 1,093 155 343 1,093 8 4.8 23.0
0360EC 460 365 400 450 500 (1)2/0-(2)4/0 (2) 3/0-250 164 280 893 128 280 893 8 4.0 19.0
575 292 400 350 400 2/0-500 (2) 3/0-250 131 224 714 103 224 714 8 3.1 15.2
380 473 600 600 600 (2) # 2-300 (2) 250-500 181 343 1,093 199 343 1,093 9 4.8 23.0
0400EC 460 390 400 450 500 (1)2/0-(2)4/0 (2) 3/0-250 149 280 893 164 280 893 9 4.0 19.0
575 311 400 350 400 2/0-500 (2) 3/0-250 119 224 714 131 224 714 9 3.1 15.2
380 524 600 600 700 (2)2/0-500 (2) 250-500 197 343 1,093 227 343 1,093 9 4.8 23.0
0440EC 460 429 600 500 600 (2) # 2-300 (2) 250-500 163 280 893 184 280 893 9 4.0 19.0
575 342 400 400 450 (1)2/0-(2)4/0 (2) 3/0-250 130 224 714 147 224 714 9 3.1 15.2
WIRE RANGE
OVER-CURRENT
Field Supply #1
CB1CB2
CB3CB4
TB
or
DS
TB
or
DS
Field Supply #2
Suitable for:
Y - D Start and
Across the Line Start
Control Panel Wiring as shown on
The Two-Compressor Diagrams
See Note 3
MULTIPLE POINT POWER SUPPLY CONNECTION
WITH OPTIONAL INDIVIDUAL SYSTEM CIRCUIT
BREAKERS
Two field provided power supply circuits to the unit with
individual branch circuit protection. Field Power Wiring
connections to factory provided, Non-Fused Disconnect
Switches (Opt), or Terminal Blocks (Opt) in the Option
Box. Factiry connections to each of the Circuit Breakers
in each of the two power panels.
See page 6 for notes.

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FORM 201.19-W2 (304)
ELECTRICAL DATA (CONT'D)
OPTIONAL SINGLE POINT POWER SUPPLY CONNECTION
AND INDIVIDUAL SYSTEM CIRCUIT BREAKERS
One field provided power supply circuits to the unit with
individual branch circuit protection. Field Power Wiring
connections to factory provided, Non-Fused Disconnect
Switches (Opt), or Terminal Blocks (Opt) in the Option
Box.
Suitable for:
Y - ∆ Start and
Across-The-Line-Start
LD05548
See page 6 for notes.
OPTIONAL SINGLE-POINT POWER SUPPLY CONNECTION WITH INDIVIDUAL UNIT CIRCUIT BREAKERS
3 & 4 COMPRESSOR UNITS
(One Field Provided Power Supply Circuit to the chiller. Field connections to Power Terminal Block (standard) or Non-Fused Disconnect (option)
in ‘Option Panel’. Circuit Breakers in each Motor Control Center
FIELD SUPPLIED WIRING
CHILLER FIELD PROVIDED POWER SUPPLY FACTORY PROVIDED (LUGS) WIRE RANGE7
MODEL
YCAS VOLTS MCA1
MIN NF OVER-CURRENT PROTECTION13 TERMINAL BLOCK NF DISC. SWITCH
DISC SW2, 9 MIN.3, 5 MAX.4, 6 (LUGS) WIRE RANGE (LUGS) WIRE RANGE
380 561 600 600 700 (2) 2/0-500 (2) 250-500
0250EC 460 464 600 500 500 (2) 1/0-300 (2) 250-500
575 372 400 400 450 (2) # 2-4/0 (3) 2/0-250
380 651 800 800 800 (2) 2/0-500 (3) 2/0-400
0270EC 460 534 600 600 700 (2) 2/0-500 (2) 250-500
575 427 600 500 500 (2) 1/0-300 (2) 250-500
380 678 800 800 800 (3) 1/0-300 (3) 2/0-400
0300EC 460 559 600 600 700 (2) 2/0-500 (2) 250-500
575 445 600 500 500 (2) 1/0-500 (2) 250-500
380 745 800 800 800 (3) 1/0-300 (3) 2/0-400
0330EC 460 612 800 700 700 (2) 2/0-500 (3) 2/0-400
575 487 600 600 600 (2) 1/0-300 (2) 250-500
380 835 1000 1000 1000 (3) 2/0-500 (4) 4/0-500
0360EC 460 689 800 800 800 (3) 1/0-300 (3) 2/0-400
575 550 600 600 600 (2) 2/0-500 (2) 250-500
380 896 1000 1000 1000 (3) 2/0-500 (4) 4/0-500
0400EC 460 739 1000 800 800 (3) 2/0-500 (4) 4/0-500
575 589 800 700 700 (2) 2/0-500 (3) 2/0-400
380 991 1200 1200 1200 (3) 2/0-500 (4) 4/0-500
0440EC 460 812 1000 1000 1000 (3) 2/0-500 (4) 4/0-500
575 647 800 800 800 (2) 2/0-500 (3 )2/0-400
CB
3
CB
4
CB
1
CB
2
TB
or
DS
F
ield Supply
Suitable for:
Y - D Start and
Across the Line Start
See Note 3

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FORM 201.19-W2 (304)
ELECTRICAL DATA (CONT'D)
7
ELECTRICAL SYSTEM #1 FIELD SUPPLIED WIRING
COMPRESSOR #1 DATA COMPRESSOR #3 DATA FAN DATA11, 12
RLA Y-∆LRA X-LRA RLA Y-∆LRA X-LRA QTY FLA (EA) LRA (EA)
155 343 1,093 155 343 1,093 8 4.8 23.0
128 280 893 128 280 893 8 4.0 19.0
103 224 714 103 224 714 8 3.1 15.2
155 343 1,093 227 343 1,093 8 4.8 23.0
128 280 893 184 280 893 8 4.0 19.0
103 224 714 147 224 714 8 3.1 15.2
181 343 1,093 199 343 1,093 9 4.8 23.0
149 280 893 164 280 893 9 4.0 19.0
119 224 714 131 224 714 9 3.1 15.2
197 343 1,093 227 343 1,093 9 4.8 23.0
163 280 893 184 280 893 9 4.0 19.0
130 224 714 147 224 714 9 3.1 15.2
199 343 1,093 155 343 1,093 8 4.8 23.0
164 280 893 128 280 893 8 4.0 19.0
131 224 714 103 224 714 8 3.1 15.2
181 343 1,093 199 343 1,093 9 4.8 23.0
149 280 893 164 280 893 9 4.0 19.0
119 224 714 131 224 714 9 3.1 15.2
197 343 1,093 227 343 1,093 9 4.8 23.0
163 280 893 184 280 893 9 4.0 19.0
130 224 714 147 224 714 9 3.1 15.2
ELECTRICAL SYSTEM #2 FIELD SUPPLIED WIRING
COMPRESSOR #2 DATA COMPRESSOR #4 DATA FAN DATA11, 12
RLA Y-∆LRA X-LRA RLA Y-∆LRA X-LRA QTY FLA (EA) LRA(EA)
155 343 1,093 — — — 4 4.8 23.0
128 280 893 — — — 4 4.0 19.0
103 224 714 — — — 4 3.1 15.2
155 343 1,093 — — — 4 4.8 23.0
128 280 893 — — — 4 4.0 19.0
103 224 714 — — — 4 3.1 15.2
181 343 1,093 — — — 5 4.8 23.0
149 280 893 — — — 5 4.0 19.0
119 224 714 — — — 5 3.1 15.2
197 343 1,093 — — — 5 4.8 23.0
163 280 893 — — — 5 4.0 19.0
130 224 714 — — — 5 3.1 15.2
199 343 1,093 155 343 1,093 8 4.8 23.0
164 280 893 128 280 893 8 4.0 19.0
131 224 714 103 224 714 8 3.1 15.2
181 343 1,093 199 343 1,093 9 4.8 23.0
149 280 893 164 280 893 9 4.0 19.0
119 224 714 131 224 714 9 3.1 15.2
197 343 1,093 227 343 1,093 9 4.8 23.0
163 280 893 184 280 893 9 4.0 19.0
130 224 714 147 224 714 9 3.1 15.2

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FORM 201.19-W2 (304)
ELEMENTARY WIRING DIAGRAM
YCAS0250 - YCAS0330 (3 COMPRESSOR)
FIG. 1 –WIRING DIAGRAM – DXST DIRECT DRIVE
LD09350

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FORM 201.19-W2 (304)
FIG. 2 –WIRING DIAGRAM – ACROSS-THE-LINE START
ELEMENTARY WIRING DIAGRAM
YCAS0250 - YCAS0330 (3 COMPRESSOR)
ACROSS-THE-LINE START
LD09352
SEE DETAIL C
ON FIGURES
28 AND 29
SEE DETAIL C
ON FIGURES
28 AND 29
SEE DETAIL C
ON FIGURES
28 AND 29

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FORM 201.19-W2 (304)
FIG. 3 –WIRING DIAGRAM – WYE DELTA START
ELEMENTARY WIRING DIAGRAM
YCAS0250 - YCAS0330 (3 COMPRESSOR)
WYE DELTA START
LD09353
SEE DETAIL C
ON FIGURES
28 AND 29
SEE DETAIL C
ON FIGURES
28 AND 29
SEE DETAIL C
ON FIGURES
28 AND 29

YORK INTERNATIONAL 15
FORM 201.19-W2 (304)
NOTES:
1. Field wiring to be in accordance with the current edition of
the National Electrical Code as well as all other applicable
codes and specifications.
2. Contacts must be suitable for switching 24VDC, (Gold
contacts recommend). Wiring shall not be run in the same
conduit with any line voltage wiring.
3. To cycle the unit on and off automatically with contact
shown, install a cycling device in series with the flow
switch (FLSW). See note 2 for contact rating and wiring
specifications.
4. To stop unit (Emergency Stop) with contacts other than
those shown, install the stop contact between terminals 5
and 1. If a stop device is not installed, a jumper must be
connected between terminals 5 and 1. Device must have
a minimum contact rating of 100A at 115 volts A.C.
5. Alarm contacts are for annunciating alarm/unit malfunc-
tion. Contacts are rated at 115V, 100VA, load only, and
must be suppressed at load by user.
6. See Installation, Operation and Maintenance Manual when
optional equipment is used.
7. Jumper must be installed for three compressor operation.
LEGEND
Transient Voltage Suppression
Terminal Block for Customer Connections
Terminal Block for Customer Low Voltage
(Class 2) Connections. See Note 2
Terminal Block for YORK Connections Only
Wiring and Components by YORK
Optional Equipment
Wiring and/or Components by Others
T S
ELEMENTARY WIRING DIAGRAM (YCAS0250 - YCAS0330)
ACROSS-THE-LINE START
AND
WYE-DELTA START
LD09351
FIG. 4 –CONTROL POWER TRANSFORMER KIT

YORK INTERNATIONAL
16
FORM 201.19-W2 (304)
FIG. 5 –ELEMENTARY WIRING DIAGRAM
LD09354
ELEMENTARY WIRING DIAGRAM
YCAS0250 - YCAS0330 (3 COMPRESSOR)
ON FIGURE 28
ON FIGURE 29
ON FIGURE 28
ON PAGE 59

YORK INTERNATIONAL 17
FORM 201.19-W2 (304)
LD09355
ON FIGURE 29
ON FIGURE 28
ON FIGURE 28
ON FIGURE 29
ON PAGE 59 ON PAGE 59
CAUTION:
No Controls (relays, etc.) should be mounted in the Smart Panel
enclosure or connected to power supplies in the control panel. Ad-
ditionally, control wiring not connected to the Smart Panel should not
be run through the cabinet. This could result in nuisance faults.
CAUTION:
Any inductive devices (relays) wired in series with the flow switch
for start/stop, into the Alarm circuitry, or pilot relays for pump
starters wired through motor contactor auxiliary contacts must be
suppressed with YORK P/N 031-00808-000 suppressor across the
relay/contactor coil.
UNIT CONTROL MIN MAX DUAL NON-FUSED VOLTAGE POWER CIRCUIT ELEMENT DISC.
SUPPLY AMP. FUSE SIZE SWITCH SIZE ALL MODELS 115-1-50/60 20A 20A 250V 30A 240V W/O TRANS. MODELS -17 200-1-60 15A 15A 250V 30A 240V WITH -28 230-1-60 15A 15A 250V 30A 240V TRANS. -46 400-1-60 8A 8A 600V 30A 480V * -58 575-1-60 8A 8A 600V 30A 600V
* All primary and secondary wiring between transformer and control panel included.
CONTROL POWER SUPPLY
Any contacts connected to flow switch inputs or BAS inputs on
terminals 13 - 19 or TB3, or any other terminals, must be sup-
pressed with a YORK P/N 031-00808-000 suppressor across the
relay/contactor coil.
CAUTION:
Control wiring connected to the control panel should never be run in
the same conduit with power wiring.

YORK INTERNATIONAL
18
FORM 201.19-W2 (304)
FIG. 6 –CONNECTION DIAGRAM 3 COMPRESSOR
LD09362
CONNECTION WIRING DIAGRAM

YORK INTERNATIONAL 19
FORM 201.19-W2 (304)
FIG. 7 –CONNECTION DIAGRAM 3 COMPRESSOR
LD09358
Power Panel

YORK INTERNATIONAL
20
FORM 201.19-W2 (304)
FIG. 8 –CONNECTION DIAGRAM 3 COMPRESSOR LD09356
CONNECTION WIRING DIAGRAM (CONT'D)
Power Panel