035-19569-101 (0109)
4-8
GB
YK Motors (Electro-Mechanical Starter)
Figure 4.6 shows the power wiring hook-up for Motor
Connections. (Refer to Wiring Labels in Motor Terminal
Box for hook-up to suit motor voltage and amperage.)
Motor leads are furnished with a crimp type connection
having a clearance hole for a 3/8" bolt, motor terminal
lugs are not furnished.
4.19 Units with Solid State Starter or Variable
Speed Drive
A unit equipped with a Solid State Starter or Variable
Speed Drive does not require wiring to the compressor
motor. The motor power wiring is factory connected to
the Solid State Starter or Variable Speed Drive (or an
optional factory installed disconnect switch). See Field
Wiring Diagram. All wiring to the control panel and the
oil pump starter is completed by the factory. A control
transformer is supplied with the Solid State Starter or
Variable Speed Drive.
4.20 Thermal Insulation
(See Product Drawings Form 160.52-PA1)
NOTE
DO NOT fi eld insulate until the unit has been
leak tested under the supervision of the York
representative.
Insulation of the type specifi ed for the job, or minimum
thickness to prevent sweating of 0°C (32°F) surfaces
should be furnished (by others) and applied to the
evaporator shell, end sheets, liquid feed line to
fl ow chamber, compressor suction connection, and
evaporator liquid heads and connections. The liquid
head fl ange insulation must be removable, to allow head
removal for the tube maintenance. Details of areas to be
insulated are given on the Product Drawing.
Units are furnished factory anti-sweat insulated on order
at additional cost. This includes all low temperature
surfaces except the two (2) evaporator liquid heads.
4.21 Installation Check
After the unit is installed, piped and wired the services
of a York representative should be requested to check
the installation and supervise the initial start-up and
operation on all chillers.
Figure 4.6 Motor Connections (Electro-Mechanical Starter Application)
3 PHASE
MOTOR 200:1 350:1 700:1 1400:1
VOLTAGE
200-600
65-111
(A)
112-224
(A)
225-829
(A)
830-1790
(A)
11-18
(C)
2300-4160
19-37
(B)
124-264
(A)
265-518
(A)
38-123
(A)
NOTES:
A. Requires passing motor lead through CT once before connecting to power supply.
B. Requires passing motor lead through CT twice before connecting to power supply.
C. Requires passing motor lead through CT three times before connecting to power supply.
MOTOR RATED LOAD AMPS
Current Transformer (CT) Ratio
Current (A)
COMPRESSOR MOTOR FIELD CONNECTION DIAGRAM
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