AEC NEC Central Station Air and Water Cooled Chiller - Manual (Page 40)

NEC Series Water- and Air-Cooled Central Chillers Page 39
; Connect the main power to the unit, and bump-start it to check for proper rotation direction.
If fans are operating backwards, reverse any two main power leads at the incoming terminal
block.
; The crankcase heater should be
ON for at least 24 hours before start-up to force
dissolved refrigerant gas from the compressor oil.
; Check your work and proceed to Section 6-5 on Page XX.
4-5 Air-Cooled NECR Chiller Startup
1. Turn the chiller ON and put it under a process load.
2. Set the controller to the desired process temperature.
3. Adjust the freezestat cutout dial on the control nipple to 10°F below the process
temperature you want.
4. Check the auxiliary pump(s) amp draws and pressures. The amp draws must be within
the pump(s) running load and service factor amps.
5. Run the chiller; look for leaks and listen for noises or vibrations that could indicate
improper operation.
6. Check for proper pressure drop across the condenser as shown in Figure 8.