Specifications

26 YORK INTERNATIONAL
INSTALLATION CHECK – REQUEST FOR
START-UP SERVICE
After the unit is installed, piped and wired as described
in this Instruction, but before any attempt is made to
start the unit, the YORK District Office should be ad-
vised so that the start-up service, included in the con-
tract price, can be scheduled. Notification to the YORK
Office should be by means of Installation Check List
and Request, Form 160.47-CL1, in triplicate. (See Fig-
ure 13.)
The services of a YORK Representative will be fur-
nished to check the installation and supervise the initial
start-up and operation on all YS units installed within
the Continental United States.
Remote Electro-Mechanical starters
for the YS Unit must be furnished in
accordance with YORK Standard
R-1079.
Each YS unit is furnished for a specific electrical power
supply as stamped on the unit data plate, which also
details the motor connection diagrams.
To insure proper motor rotation, the
starter power input and starter to mo-
tor connections must be checked with
a phase sequence indicator in the pres-
ence of the YORK Representative.
IMPORTANT: DO NOT cut wires to
final length or make final connec-
tions to motor terminals or starter
power input terminals until approved
by the YORK Representative.
Figure 12 shows the power wiring hook-up for YS Mo-
tor Connections. (Refer to Wiring Labels in Motor Ter-
minal Box for hook-up to suit motor voltage and amper-
age.)
Motor leads are furnished with a crimp-type connection
having a clearance hole for a 3/8 inch bolt, motor termi-
nal lugs are not furnished.
Unit With Solid State Starter (Optional)
A YS unit equipped with a Solid State Starter, does not
require wiring to the compressor-motor. The motor
power wiring is factory connected to the Solid State
Starter (or an optional factory installed disconnect
switch). All wiring to the control panel is completed by
the factory. A control transformer is furnished with the
Solid State Starter. Refer to Form 160.80-PW1.
INSULATION
Insulation of the type specified for the job, or minimum
thickness to prevent sweating of 30°F surfaces (water
chill application), should be furnished (by others) and
applied to the cooler shell, end sheets, liquid feed line to
flow chamber, compressor suction connection, and cooler
liquid heads and connections. The liquid head flange in-
sulation must be removable to allow head removal for
tube maintenance. Details of areas to be insulated are
given in Product Drawing, Form 160.47-PA1.
Units can be furnished, factory anti-sweat insulated, on
order at additional cost. This includes all low tempera-
ture surfaces except the two cooler liquid heads.
IMPORTANT: DO NOT field insulate
until the unit has been leak tested un-
der the supervision of the YORK Rep-
resentative.
Installation
POWER WIRING (CONT’D)