Control panel positioning
About this task:
On large YK chillers equipped with H9 and K1-K7 compressors, the control panel height can
be adjusted. On chillers equipped with P and Q compressors, the control panel height is not
adjustable. The OptiView
™
Control Center is placed in a position above the evaporator for shipping.
To move the control center into position for operation, complete the following steps:
1. While supporting the control center, remove the hardware between the support arms and
the evaporator.
2. Swing the control center into a vertical position.
3. Slide the control center down the guide rails to the proper position. Tighten securely.
4. Discard unused hardware.
Figure 11: Correct control panel positioning (H9, K1-K7)
Control wiring
On units shipped disassembled, after installation of the control center, control wiring must be
completed between unit components and control center, solid state starter, or variable speed
drive, when used, using wiring harnesses furnished. Refer to Installation and Reassembly - Unit (Form
160.75-N3).
Field wiring connections for commonly encountered control modifications not by Johnson Controls,
if required, are shown on Wiring Diagrams – Field Control Modifications (Form 160.75-PW4).
Note: When wiring the unit, do not deviate from what is shown in the provided drawings
without prior approval from a Johnson Controls representative.
27Model YK (Style G) Centrifugal Liquid Chiller
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