Schreiber Chillers 15MEDAC email - Manual (Page 17)

At the end of the setpoints screen is the compressor rotation screen. Rotation should be
enabled.
Turn on compressor 1 (pump 1 must still be on) . If the setpoint is below the current
tank temperature the compressor will start. The fan will start after a short delay, and
will slowly ramp up to speed. Scroll through the current status screens to check return
temperature of pump 1., and head pressure of compressor 1. Record pump,
compressor and fan amp draws, and fan operating speed (Hz)
System 2:
At the ON/OFF screen, turn off compressor 1, and then turn on compressor 2. The
rotation will now automatically change from FORWARD to REVERSE. Compressor 2 will
now cycle to maintain the tank temperature.
If required, lower the set-point to force this compressor to cycle
When the compressor cycles, check the head pressure and amp draw. Record these
values.