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Page 36 of 86 SSC Series Central Chilling Stations
þ Electrical connections must conform to all applicable codes.
þ Complete the chilled water TO and FROM PROCESS
connections.
þ The optional or field installed chilled water supply and return
valves must be open.
þ 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.
þ The air cooled condenser should have an adequate supply of air
for proper operation.
þ 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.
þ Remove all tools, foreign matter and debris from the pump
tank reservoir and piping.
þ Complete all piping leading to and from the pump tank.
Observe all applicable codes.
þ Complete all electrical wiring. Observe all applicable codes.
þ Prepare all related equipment in the system for operation.
Note:
• Never switch contactor leads or motor leads for reversing
rotation.
• Do not use contactor or motor leads for phase matching.
• Compressor noise from reverse rotation is noticeable. Do
not run in this mode for more than ten (10) seconds. The
compressor shuts off if run longer in this mode.
• Reverse rotation can cause suction and discharge pressures
to be approximately equal; amp draws are lower than
normal.
• If you discover that compressor rotation is reversed, correct
it by switching any two main power leads into the
disconnect switch or distribution block on the unit.
þ Open the 1” (approx. 25 mm) makeup water valve and allow
the tank to fill until the automatic float valve shuts off. The
float level should be adjusted so the standing water level is 8”
(20 cm) from the top of the tank.