Advantage Engineering Maximum Instruction Manual page 27

MK Series Portable Chiller : Air-Cooled : HE INSTRUMENT
B. INSTRUMENT OPERATION
1.
2.
3.
4.
5.
start. This switch must be manually reset before
operations can continue.
e. Freezestat safety switch open: a 'flashing red'
FREEZESTAT light indicates the freezestat safety
switch is open. This normally occurs when the 'to
process' temperature is below the freezestat setting.
The typical freezestat setting is 38°F for setpoint
temperatures from 48° to 70°F. If the 'to process'
temperature is higher than the freezestat setting,
check for proper operation of the freezestat safety
switch.
When the START key is pressed, the instrument will activate
all displays and begin operations.
Use the SELECT key to index through the temperature and
set up functions until the TEMP light is illuminated. The
operator can push and hold the SELECT key to
automatically index through each function.
When the TEMP light is illuminated, the setpoint
temperature is displayed in the TEMPERATURE DISPLAY
window. Use the UP and DOWN ARROW keys to change
the setpoint temperature.
PRECAUTIONS: the instrument is programmed from the
factory with a setpoint range of 48° to 70°F. To operate
below 48°F, the addition of inhibited propylene glycol and
modification of the safety control settings are required.
Diligent monitoring of the water/glycol solution is
mandatory to prevent freezing of the evaporator. Freezing
may cause the evaporator to rupture allowing water and
freon to mix which will cause major damage to the
refrigeration system. Operating above 70°F requires the
addition of a refrigerant crankcase pressure regulating (CPR)
valve. The CPR valve is necessary to prevent overloading of
the compressor which can cause premature failure. Contact
your local refrigeration contractor or the factory service
department for further information. The operating range of
the instrument may be changed to 20°F - 90°F by
adjustment of the CPU DIP switches. Refer to the technical
section of this manual for more information.
After selecting the setpoint temperature, the operator may
leave the display in the that state. The display will
automatically return to the TO PROCESS temperature state
after 10 seconds. If the operator leaves the display in any
state other than the TO PROCESS state, the display will
automatically revert after 10 seconds of inactivity.
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
Fax: 317-881-1277
Page: 27