GEM Models A/W Operation: Performance Page 17
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:
GEM0650 A&W 115/60/1 8-9 Amps GEM0655 A&W 230/50/1 5-7 Amps
GEM0956 A&W 208-230/60/1 4-5 Amps GEM0955 A&W 230/50/1 4-5 Amps
GEM1256 A&W 208-230/60/1 5-6 Amps GEM1855 Air 230/50/1 4-5 Amps
GEM1856 Air 208-230/60/1 4-5 Amps
Typical Auger Drive Motor Amp Draw:
GEM0650 A&W 115/60/1 3.1 to 3.8 Amps GEM0655 A&W 230/50/1 1.6 to 3.8 Amps
GEM0956 A&W 208-230/60/1 1.6 to 1.8 Amps GEM0955 A&W 230/50/1 1.6 to 3.8 Amps
GEM1256 A&W 208-230/60/1 1.6 to 1.8 Amps GEM1855 Air 230/50/1 1.6 to 3.8 Amps
GEM1856 Air 208-230/60/1 1.6 to 1.8 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
GEM0650 GEM0655
Air Cooled: 24 ounces Air Cooled: 24 ounces
Water Cooled: 19 ounces Water Cooled: 19 ounces
GEM0956 GEM0955
Air Cooled: 30 ounces Air Cooled: 30 ounces
Water Cooled: 22 ounces Water Cooled: 22 ounces
GEM1256
Air Cooled: 36 ounces GEM1855
Water Cooled: 24 ounces Air Cooled 30 ounces
GEM1856
Air Cooled 30 ounces