Insulation; Installation Check - Request For Start-Up Service - York YK Installation Instructions Manual

SECTION 2 - INSTALLATION
Chiller with Solid State Starter or Variable
Speed Drive
A chiller equipped with a factory mounted 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. Refer to the Field Wiring Diagram. All
wiring to the control panel and the oil pump starter is
completed by the factory. A control transformer is fur-
nished with the Solid State Starter or Variable Speed
Drive.
Copper Conductors – Only connect cop-
per conductors to compressor motors
and starters. Aluminum conductors have
proven to be unsatisfactory when con-
nected to copper lugs. Aluminum oxide
and the difference in thermal conductiv-
ity between copper and aluminum mean
the required tight connection cannot be
guaranteed over a long period of time.

INSULATION

DO NOT field insulate until the unit has
been leak tested under the supervision of
the Johnson Controls representative.
24
Insulation of the type specified for the job, or mini-
mum thickness to prevent sweating of 30°F (-1°C) sur-
faces should be furnished (by others) and applied to the
evaporator shell, end sheets, liquid feed line to flow
chamber, compressor suction connection, and evapo-
rator liquid heads and connections. The liquid head
flange insulation must be removable, to allow head re-
moval for the tube maintenance. Details of areas to be
insulated are given on the Product Drawing.
Units are furnished factory anti-sweat insulated on or-
der at additional cost. This includes all low tempera-
ture surfaces except the two (2) cooler liquid heads.
INSTALLATION CHECK – REQUEST FOR
START-UP SERVICE
The services of a Johnson Controls representative will
be furnished to check the installation and supervise the
initial start-up and operation on all chillers installed
within the Continental United States.
After the unit is installed, piped and wired as described
in this Instruction, but before any attempt is made to
start the unit, the Johnson Controls District Office
should be advised so that the start-up service, included
in the contract price, can be scheduled. Use the In-
stallation Checklist and Request for startup, (Form
160.76-CL1).
FORM 160.76-N1
ISSUE DATE: 06/21/2019
JOHNSON CONTROLS