Ice-O-Matic MFI, Service And Installation Manual

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MFI Series Operation: Performance
Page 15
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
Typical Discharge Pressure:
Air Cooled: 220-275 PSIG
Typical Compressor Amp Draw:
MFI0500AS 115/60/1 8-9 Amps
MFI0500WS 115/60/1 8-9 Amps
MFI0800AS 115/60/1 8-9 Amps
MFI0806AS 208-230/60/1 5-6 Amps
MFI0806WS 208-230/60/1 5-6 Amps
MFI0805AS 230/50/1 5-6 Amps
MFI1256AS 208-230/60/1 5-6 Amps
MFI1255AS 230/50/1 5-6 Amps
Typical Auger Drive Motor Amp Draw:
MFI0500AS 115/60/1 4.0 to 4.5 Amps
MFI0500WAS 115/60/1 4.0 to 4.5 Amps
MFI0800AS 115/60/1 4.0 to 4.5 Amps
MFI0806AS 208-230/60/1 1.6 to 3.8 Amps
MFI0806WS 208-230/60/1 1.6 to 3.8 Amps
MFI0805AS 230/50/1 1.6 to 3.8 Amps
MFI1256AS 208-230/60/1 1.6 to 3.8 Amps
MFI1255AS 230/50/1 1.6 to 3.8 Amps
Expansion Valve Superheat: 6-8 degrees
High Pressure Cut Out- Automatic Reset: 450 PSIG
Low Pressure Cut Out- Automatic Reset: 15 PSIG
Refrigerant Charge: R404A
MFI0500 Air Cooled 22 Ounces
MFI0500 Water Cooled 18 Ounces
MFI0800 Air Cooled 24 Ounces
MFI0806 Air Cooled 24 Ounces
MFI0806 Water Cooled 20 Ounces
MFI0805 Air Cooled 24 Ounces
MFI1256 Air Cooled 36 Ounces
MFI1255 Air Cooled 36 Ounces