Schreiber Chillers 2203AC - 3-Stage Chiller - Manual (Page 21)

Fans
The fans should be spinning CLOCKWISE if looking down on the fan. Air should be drawn for
the bottom of the chiller and be discharged out of the top.
SYSTEM STARTUP : not applicable for 3-stages chiller
¾ Pump 2 (Cryo compressor pump) Startup and bypass adjustment
¾ Go to the ON/OFF screen.
¾ Turn on PUMP 1. Since the piping system is not full of water, and the flow switch is on
the return line inside the chiller, the flow switch may trip before the pump has time to fill
the pipe. Reset the flow alarm. The pump will restart. It should now run normally. If it
continues to shut off, make sure all valves on that line are open. If there is flow, and the
system is simply tripping out because the pipe is not full, the pump start flow time delay
setting can be increased. Or the flow alarm can be temporarily bypassed. Make sure to
restore these setting to the default if they are changed.
¾ Check the discharge pressure. Slowly shut off the discharge valve and watch the pressure
gauge. It should not exceed 100 psi.
¾ If the pressure climbs past 100 open the valve. Go to the pressure relief bypass (T-Handle
valve on the chiller discharge fitting inside the cabinet) and open the bypass (counter
clockwise). Repeat the discharge shut off valve closure until the bypass is adjusted to 100
psi
¾ Open the discharge shut off valve fully.
Pump 1 Start up and bypass adjustment.
Turn on pump 1. The pump may experience the same flow errors as for PUMP 2. Follow the
same procedure as listed above if necessary.
The bypass valve (ball valve on centrifugal pump discharge) should be opend until there is no
more than 35 psi difference across the Pump 2 discharge pressure gauge and the return pressure
gauge. This is per Philips Medical Systems specifications.
Refrigeration System Startup
NOTE: To get the most accurate start up situation, there should be an actual load on the chiller.
IF there is not a load on the chiller, the discharge temperature setpoint should be raised so that
the refrigeration system will not get the water too cold.
System 1:
Verify that pump 1 is on. Compressor 1 and compressor 2 should be off. Check the units (C or
F, psi or bar). Change the units to whatever system is required. They should be changed before