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SCW Series Central Chilling Stations Page 37 of 77
7. Operate the chiller, looking for leaks and listening for
unusual noises or vibrations that could indicate improper
operation.
5-4 Remote Air-Cooled SCW Series Startup Checklist
; Check the shipping papers against the serial tag to be sure
chiller size, type and voltage is correct for the process.
; Check the transformer primary voltage connections to be sure
they are configured for the electrical power you are using.
; The voltage at the main power connection must read within
plus or minus ten percent (±10%) of the voltage listed on the
serial tag.
; Phase imbalance must be less than two percent (<2%).
; Electrical connections must conform to all applicable codes.
; Complete the chilled water TO PROCESS and FROM
PROCESS
connections.
; The optional or field installed chilled water supply and return
valves must be open.
; Be sure the tank and chilled water circuit piping are filled with
a water/glycol mixture. The water/glycol mix should provide
freeze protection to 20°F below the leaving water temperature
you’ve selected.
; The air cooled condenser should have an adequate supply of air
for proper operation.
; Connect the main power to the unit and bump-start it to check
for proper rotation direction. If the fans are operating
backwards, reverse any two main power leads at the incoming
terminal block.
; Remove all tools, foreign matter and debris from the pump
tank reservoir and piping.
; Complete all piping leading to and from the pump tank.
Observe all applicable codes.
; Complete all electrical wiring. Observe all applicable codes.
; Prepare all related equipment in the system for operation.
; Check for proper compressor rotation direction. To confirm
proper rotation:
1. Connect a phase meter and phase incoming power ABC.