Manitowoc QM20

208 Part Number 80-01111-9 7/10
SM50 SELF-CONTAINED AIR-COOLED
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Times in minutes
24 Hour Ice Production
Based on the average weight of 1 harvest cycle .63 – .71 lb 
(286 – 322 g).
Nominal Individual Cube Weight .70 ounces (20 g)
Cubes Per Harvest Cycle 16
Operating Pressures
Suction pressure drops gradually throughout the freeze cycle
Air Temp.
Entering
Condenser
°F/°C
Freeze Time
Harvest
Time
Water Temperature °F/°C
50/10 70/21 90/32
70/21 15.6-17.8 15.3-17.4 15.6-17.8
1.0-3.5
80/27 16.6-18.9 17.0-19.4 17.4-19.8
90/32 17.4-19.8 19.1-21.7 18.2-20.7
100/38 19.2-22.1 19.8-22.7 22.4-25.4
110/43 24.9-28.2 25.7-29.1 31.4-35.5
Air Temp. Entering
Condenser °F/°C
Water Temperature °F/°C
50/10 70/21 90/32
70/21 53 54 53
80/27 50 49 48
90/32 48 44 46
100/38 40 39 38
110/43 35 34 28
Air Temp.
Entering
Condenser
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10 125-70 18-0 50-75 20-55
70/21 135-95 18-0 65-85 35-60
80/27 165-115 19-2 75-100 40-70
90/32 195-135 20-3 85-120 40-70
100/38 235-165 24-5 100-135 50-80
110/43 255-185 28-7 110-155 50-90