YD motors (floor-mounted starter)
Figure 25 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 in. bolt,
motor terminal lugs are not furnished.
The YD Chiller has two motors which must be connected to the proper starter. When viewed from
the chiller evaporator shell, motor #1 is on the left and motor #2 is on the right.
Figure 25: Compressor motor field connections diagram (floor mounted)
Insulation
CAUTION
DO NOT field insulate until the unit has been leak tested under the supervision of the Johnson Controls
representative.
Insulation of the type specified for the job, or minimum thickness to prevent sweating of 30°F
(-1°C) surfaces should be furnished (by others) and applied to the evaporator shell, end sheets,
liquid feed line to flow chamber, compressor suction connection, and evaporator liquid heads and
connections. The liquid head flange insulation must be removable, to allow head removal for the
tube maintenance. Details of areas to be insulated are provided in the product drawings shipped
with the chiller.
Units are furnished factory anti-sweat insulated on order at additional cost. This includes all low
temperature surfaces except the two (2) cooler liquid heads.
43Centrifugal Liquid Chillers
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