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Form 160.47-PW4 (1098), Wiring Diagram - Field Connections Millennium YS Rotary Screw Chiller MicroComputer Control Center JOB DATA:
CHILLER MODEL NO. YS _______ NUMBER OF UNITS __________________
SOLID STATE STARTER, MODEL NO.
SSS– __________________ L ___________________
MOTOR/STARTER POWER ______ VOLTS, 3-PHASE, ________ HERTZ
OPTIONAL FACTORY INSTALLED DISCONNECT SWITCH _________________ AMPS
NOTES:
1. All field wiring shall be in accordance with the current
edition of the National Electrical Code (N.E.C.) as
well as all other applicable codes and specifications.
2. Solid State Starter shall be grounded in accordance
with the N.E.C. (paragraph 250-91 (b)) for equipment
grounding. Where a separate grounding conductor
is used, it must be a copper conductor only and
sized per the N.E.C. (Table 250-95). See Note 8 for
grounding lug wire range.
3. Wiring, electrical conduit, junction boxes, fused dis-
connect switches (FDS), or circuit breakers, start-
ers (M), push-button stations (PB), manual-off-auto-
matic switch (S), flow switch (FLS), and control re-
lays furnished by others unless otherwise specified.
4. Items marked with an * are furnished by York Inter-
national Corporation.
5. Items marked with an ** are available from York
International Corporation at additional cost.
6. Control power supply 115V – 50/60 Hz, 1.5 KVA ca-
pacity for control center only, is supplied by a control
power transformer (5T) mounted on the side of the
Solid State Starter as shown. It is factory wired.
7. Multiple conduits must contain an equal number of
wires from each phase in each conduit to prevent
overheating. Use copper conductors only; DO NOT
USE aluminum conductors. See Note 8 for factory
furnished starter terminal lugs.
Starter Model
Line Side Lugs
No. & Avail.
Grounding Lug
Disconnect
Wire Range,
Amp Rating
Quan. Per
Wire Range
Lug
Quantity
(See Note 17a)
Terminal
Rating
(AL9CU)
SSS 7L, 250A
1
#4 - 350MCM
AL7CU
#6 AWG to
SSS 7L, 400A
2
3/0 - 250MCM
AL9CU 350MCM, one bbl.
SSS 14L, 600A
2
250 - 500MCM
AL9CU
SSS 26L, 1000A
4
1/0 - 350MCM
AL7CU
#6 AWG to
250MCM, four bbl.
8. The following terminal lugs are factory furnished for field
wiring connections when a factory-installed disconnect
switch is not supplied. All lugs are rated AL9CU.
PRODUCT DRAWING
YORK INTERNATIONAL CORPORATION
P.O. Box 1592, YORK, PA 17405
CONTRACTOR _______________________
PURCHASER ____________________________________________
ORDER NO. __________________________
JOB NAME _______________________________________________
YORK CONTRACT NO. _________________
LOCATION _______________________________________________
YORK ORDER NO. ____________________
ENGINEER ______________________________________________
REFERENCE
DATE ________
APPROVAL
DATE ________
CONSTRUCTION
DATE ________
Supersedes: 160.47-PW4 (798)
WIRING DIAGRAM FIELD CONNECTIONS
MILLENNIUM YS (STYLE C & D) ROTARY SCREW CHILLER
MICROCOMPUTER CONTROL CENTER
WITH YORK SOLID STATE STARTER
FORM 160.47-PW4 (1098)
Starter Model
Line Side Lugs
Grounding Lug
No. w/o Dis-
Quan. Per
Wire Range
Wire Range,
connect Option
Terminal
Quantity
SSS 7L
1
#2 - 500MCM
#6 AWG to
SSS 14L
2
#2 - 500MCM
350MCM, one bbl.
SSS 26L
3
#2 - 600MCM
#6 AWG -
SSS 33L
4
250MCM, four bbl.
The following terminal lugs are factory furnished for
field wiring connections when a factory-installed dis-
connect switch is supplied.
9. Condenser water pump motor starter (3M) holding
coil to be furnished for 115V – 50/60 Hz. The power
requirements for the water pump starter (3M) must
be a max. of 1 Amp holding and 10 Amps inrush. If
power requirements exceed this value, furnish coil
for line voltage, and control relay with 115V coil.
10. Units shipped knocked down require field connec-
tion of harnesses to control panel, power wiring be-
tween compressor motor and starter and SSS cool- 2
YORK INTERNATIONAL
ing pump to solid state starter. These harnesses
and power wiring are furnished by York International
Corporation for field assembly and consist of proper
lengths of flexible conduit with necessary connec-
tors, and contain the wires (shown in Note 13) prop-
erly terminated and marked.
11. Wire #14 AWG copper for one way distance of less
than 175 feet. Wire #12 AWG copper for one way
distance of more than 175 feet, but less than 300
feet.
12. Wiring diagram for YORK Micro Computer Control
Center, Style C, Form 160.47-PW2; Style D, Form
160.47-PW12. Field wiring modifications per Form
160.47-PW5. Wiring diagram for YORK Solid State
Starter Form 160.47-PW6.
13. The following interconnecting wires are factory sup-
plied when a YORK Solid State Starter is used. (See
Forms 160.47-PW6, 160.47-PW2, Style C and
160.47-PW12, Style D.)
a. Starter to control center – L, 2, 110, 111, 112,
113, 114, and 115; 11 conductor shielded cable.
b. Starter to cooling pump – 2, 108, GRD.
14. Full load amperes for 1.5 KVA control power trans-
former (furnished by York International Corporation
and factory wired) to be used with Notes 15, 16 and
17 are:
16. The YORK Solid State Starter power wiring ampacity
shall be calculated as follows.
Model YS minimum circuit ampacity:
Ampacity = 1.25 (Compressor-Motor FLA) + Con-
trol Transformer Amps
Where 125% factor per N.E.C. (Para. 440-33); FLA
is per Note 7; control power transformer Amps per
Note 14.
17. If the fused disconnect switch (FDS2) is not located
in sight (N.E.C. Para. 440-14) of the YORK Solid
State Starter, a non-fused disconnect switch (not
shown) shall be located in sight of the Solid State
Starter between FDS2 and the Solid State Starter.
The ampere rating shall be determined as follows for
the disconnect switch of FDS2: The larger of
a. Amp Rating = 1.15 (Compressor-Motor FLA +
Control Transformer Amps)
or
b. The size required to mount the fuses determined
in Note 15 (if a fused disconnect is employed).
Where 115% factor is per N.E.C. (Para. 440-12b
(2)); FLA is per Note 7 and control power transformer
Amps per Note 14. An optional factory mounted and
wired disconnect switch within the SSS is available
(see Note 8).
18. Control circuit wiring for 3M condenser water pump
motor starter is shown for cooling only application.
19. The main power transformer should be adequately
sized such that the transformer voltage drop does
not exceed 10% during unit start-up. The supply volt-
age, at starter input terminals, during start-up must
be maintained above the minimum value specified in
the table. Note that while the YORK chiller will per-
form acceptably during startup with this amount of
voltage drop, the performance of other equipment
connected to the supply transformer could be ad-
versely affected.
Starter
Max. Fuse/Breaker
Model No.
Size (Amps)
SSS 7L
450
SSS 14L
800
SSS 26L
1600
SSS 33L
1600
3-Phase
Control Power
Voltage
Hz
(5T) Transformer
(Amps)
200/208
60
7.5
220/230/240
60
6.8
440/460/480
60
3.4
550/575/600
60
2.7
380/400/415
50
3.9
15. The branch circuit overcurrent protection device(s)
for the YORK Solid State Starter must be a time
delay type with a rating which is the smaller of the
two values listed below (a) or (b):
a. The next standard fuse/breaker rating above:
1.5 (Compressor-Motor FLA) + Control Trans-
former Amps
b. A rating limited by the starter size as follows:
Three
Minimum Voltage at
Phase
Hz
Starter Input Terminals
Voltage
During Start-up
200/208
60
170
230/240
60
196
440/460/480
60
391
575/600
60
489
380
50
323
400
50
340
415
50
353
Where 150% factor is per U.L. Standard 465 (7th
Edition), Para. 45.1; FLA is per Note 7; control power
transformer Amps per Note 14.
20. Automatic control of the chilled water pump by the
Control Center is shown. Chilled water pump motor FORM 160.47-PW4
3
YORK INTERNA
TIONAL
WIRING DIAGRAM – FIELD CONNECTIONS (SOLID STATE STARTER)
LD03608 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 160.47-PW4 (1098)
Supersedes: 160.47-PW4 (798)
starter (5M) holding coil to be furnished for 115V –
50/60 Hz. The power requirements for the water pump
starter (5M) must be a maximum of 2 Amps induc-
tive at 115VAC. If power requirements exceed this
value, furnish coil for line voltage, and control relay
with 115V coil.
Two chilled water pump operating modes are avail-
able via the CHW Pump programming jumper (J54)
on the micro board. With J54 installed, the chilled
water pump operates for 30 seconds prior to com-
pressor start, during compressor operation,
coastdown, and LWT cycling shutdowns. With J54
removed, the chilled water pump operates as above
plus it operates during MULTI-UNIT and REMOTE/
LOCAL cycling shutdowns.
For manual chilled water pump control, connect a
manual start/stop switch as shown in Detail A.
21. Each 115VAC field-connected inductive load, i.e.
relay coil, motor starter coil, etc. shall have a tran-
sient suppressor wired (by others) in parallel with its
coil, ph