Instruction manual

Maximum Series Portable Chiller : Air & Water-Cooled : M1 Series Instrument
Page: 58
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: [phone]
Service Department Fax: [phone]
Email: [e-mail]
solenoid valve to unload the compressor to a low as about 20%
capacity. Units without a digital scroll compressor use a hot gas
bypass solenoid valve to reduce the chiller capacity to about 50%.
I. HIGH/LOW PRESSURE SWITCH: The high and low pressure
switches protect the refrigeration system from usage operating
conditions. Units may be equipped with either an adjustable or
non-adjustable‘xed’highandlowpressureswitches.
The high pressure switch is factory set and protects the
refrigeration components and personnel from potential damage and
injury from excessive pressure. The high pressure safety must not
bealteredintheeldforanyreason(seesection8.1forfactory
settings.
The low pressure switch is factory set to open at 32°F and to close
at 36°F - 38°F*. The low pressure switch protects the chiller from
damage caused by low refrigerant pressure operating below the
coolinguid’sfreezepoint.
NEVER LOWER THE CUT OUT SETTING WITHOUT ADDING
GLYCOL TO THE CIRCULATING SYSTEM. EVAPORATOR
DAMAGE WILL RESULT AND WILL NOT BE COVERED BY THE
WARRANTY.
J.
Liquid receiver: (optional feature) located after the condenser,
this component receives and stores liquid refrigerant leaving the
condenser.
K. Service valves: These valves are located throughout the system.
Onlyaqualiedrefrigerationservicetechnicianshalloperatethese
valves.
* See Temperature-Pressure
chart in Section 8.5 for
refrigerant pressure.
Adjustable low
pressure switch
Typicalplacementofnon-adjustable“xed”pressureswitches.
Non-adjustable“xed”
low pressure switch
Non-adjustable“xed”
high pressure switch
Adjustable high
pressure switch