Schreiber Chillers 15medWC - Manual (Page 21)

permanent settings are made, because they only change the display of sensor values, not setpoint
values. For example, if the reservoir is at 68 F, and the setpoint is 50 F, changing the units to C
will change the reservoir temperature display to 20 C, but the setpoint will be 50 C, not 10 C.
Check the setpoints by pressing the SET button. They should match the default settings listed in
the MAINTENANCE section.
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.