Advantage Maximum MG Series - Page 30

Maximum Series Portable Chiller : Air & Water-Cooled : MG Series Instrument
update 08/02/2021
Page: 30
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
Email: service@AdvantageEngineering.com
3.3 INSTRUMENT - MG Instrument
A. PRECAUTIONS
1. The chiller control is programmed from the factory with a setpoint range of 48°
to 90°F. To operate below 48°F, the addition of inhibited propylene glycol and
modicationofthelimitcontrolsettingsarerequired.Theseadjustmentsare
done from the chiller controller screen. 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.
2. R134A and R407C models operating above 65°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 lower the temperature of the gas
returning to the compressor so that the compressor is cooled properly. R410A
models may be operated up to 80°F without a CPR valve.
3 R410A models, please note then operating above 65°F, it is important to consider
ambienttemperatureforcondensingcapability.Highuidtemperatureswithhigh
ambient will impact condenser performance and may result in limit switch shut
down. Consult Factory for selection assistance.
4. Contact your local refrigeration contractor or the factory for further information.
The operating range of the chiller control may be changed to 0°F - 90°F by
adjusting the Minimum Setpoint. Refer to Section 3.10D of this manual for more
information.
MGSeriesControl.Thiscontrolinstrumentisusedonunitswithxeddisplacement
compressors.