Instruction manual

Maximum Series Portable Chiller : Air & Water-Cooled : M1 Series Instrument
Page: 31
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: [phone]
Service Department Fax: [phone]
Email: [e-mail]
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.
R134A and R407C models operating above 70°F and
R404A models operating above 60°F require 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. R410A
models may be operated up to 80°F without a CPR valve.
Contact your local refrigeration contractor or the factory for
further information. The operating range of the chiller control
may be changed to 10°F - 90°F by adjusting the Setpoint
M1SeriesControl.Thiscontrolinstrumentisusedonunitswithxeddisplacementcompressors.
M1D Series Control. This control instrument is used on units with digital scroll compressors.
Figure 3.3A