JOHNSON CONTROLS
37
SECTION 1 – INSTALLATION
FORM 160.81-NOM1
ISSUE DATE: 10/3/2020
1
INSULATION
Insulation of the type specified for the job, or minimum
thickness to prevent sweating of 30°F (-1° C) surfaces
(water chill application), should be furnished (by others)
and applied to the evaporator shell, end sheets, liquid
feed line to flow chamber, compressor suction connec-
tion, and evaporator liquid heads and connections. The
liquid head flange insulation must be removable to allow
head removal for tube maintenance. Details of areas to
be insulated are given in
Product Drawing (Form
160.81‑PA1).
Units can be furnished, factory anti-sweat insulated, on
order at additional cost. This includes all low tempera-
ture surfaces except the two evaporator liquid heads.
IMPORTANT: DO NOT field insulate
until the unit has been leak tested under
the supervision of the Johnson Controls
Representative.
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 Johnson Controls Service Office
should be advised so that the start-up service, included
in the contract price, can be scheduled. Notification
to the Johnson Controls Service Office should be by
means of
Installation Check List and Request (Form
160.81‑CL1)
in triplicate.
The services of a Johnson Controls Representative will
be furnished to check the installation and supervise the
initial start-up and operation on all YR units installed
within the Continental United States.
To ensure proper motor rotation, the
starter power input and starter to motor
connections must be checked with a phase
sequence indicator in the presence of the
Johnson Controls Representative.
IMPORTANT: DO NOT cut wires to final
length or make final connections to motor
terminals or starter power input terminals
until approved by the Johnson Controls
Representative.
shows the power wiring
hook-up for YR Motor Connections. (Refer to Wir-
ing Labels in Motor Terminal Box for hook-up to suit
motor voltage and amperage.)
Unit With Solid State Starter (Optional)
A YR 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. All wiring to the control panel is completed by
the factory. A control transformer is furnished with the
Solid State Starter. Refer to
Wiring Diagram (Form
160.81‑PW1).
LD07070
FIGURE 17 -
YR MOTOR CONNECTIONS (ELECTRO-
MECHANICAL STARTER)
