Technical Manual

GEM-MFI SERIES Operation: Performance-A&W
Page 29
Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line
directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or
water and then it condenses into a liquid.
This high pressure liquid then goes through the liquid line to the expansion valve. The thermostatic expansion
valve meters liquid refrigerant into the evaporator, the volume of liquid refrigerant depending upon the
temperature of the evaporator.
At the evaporator, the refrigerant enters an area of relatively low pressure, where it can easily “boil off” or
evaporate. As it evaporates, it absorbs heat from the evaporator and whatever is in contact with it (such as
water inside it). After the evaporator, the refrigerant, now a low pressure vapor, goes through the suction line
back to the compressor, where the cycle is repeated.
Typical Low Side Pressure:
Air Cooled: 34-38 PSIG
Water Cooled: 32 PSIG
Typical Discharge Pressure:
Air Cooled: 220-275 PSIG
Water Cooled: 245 PSIG
Typical Compressor Amp Draw:
GEM0450/MFI0500 115/60/1 7.8 Amps
GEM0650/MFI0800 115/60/1 11.9 Amps
GEM0655/MFI0805 230/50/1 6.0 Amps
GEM0956/MFI1256 208-230/60/1 7.0 Amps
GEM0955/MFI1255 230/50/1 8.86 Amps
Typical Auger Drive Motor Amp Draw:
GEM0450/MFI0500 115/60/1 4.6 Amps
GEM0650/MFI0800 115/60/1 4.6 Amps
GEM0655/MFI0805 230/50/1 2.0 Amps
GEM0956/MFI1256 208-230/60/1 2.4 Amps
GEM0955/MFI1255 230/50/1 2.3 Amps
High Pressure Cut Out- Automatic Reset: 450 PSIG
Low Pressure Cut Out- Automatic Reset: 15 PSIG
Refrigerant Charge: R404A
GEM0450/MFI0500
Air Cooled: 22 ounces
Water Cooled: 18 ounces
GEM0650/MFI0800
GEM0655/MFI0805
Air Cooled: 24 ounces Air Cooled: 24 ounces
Water Cooled: 19 ounces Water Cooled: 19 ounces
GEM0956/MFI1256
GEM0955/MFI1255
Air Cooled: 30 ounces Air Cooled: 30 ounces
Water Cooled: 22 ounces Water Cooled: 22 ounces