Q270 Self-Contained Air-Cooled - Manitowoc SM050 Technician's Handbook

Q270 SELF-CONTAINED AIR-COOLED

NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Entering
Condenser
°F/°C
70/21
80/27
90/32
100/38
Times in minutes
24 Hour Ice Production
Air Temp. Entering
Condenser °F/°C
70/21
80/27
90/32
100/38
Based on average ice slab weight of 2.44 - 2.75 lb (1107 – 1247 g).
Regular cube derate is 7%
Operating Pressures
Air Temp.
Entering
Condenser
°F/°C
50/10
70/21
80/27
90/32
100/38
Suction pressure drops gradually throughout the freeze cycle
Part Number 8001119 10/19
Freeze Time
Water Temperature °F/°C
50/10
11.0-12.6 12.8-14.7
11.3-12.9 13.1-15.0
12.6-14.3 14.8-16.9
14.1-16.1 17.0-19.3
50/10
Freeze Cycle
Discharge
Pressure Pressure
PSIG
200-255
200-255
200-295
240-330
265-375
70/21 90/32
14.5-16.5
14.8-16.9
17.0-19.3
19.8-22.5
Water Temperature °F/°C
70/21
280
275
250
225
Suction Discharge
Pressure
PSIG
60-22 165-200
60-22 170-205
61-23 175-210
65-26 205-240
66-30 220-260
Harvest
Time
1.0-2.5
90/32
245 220
240 215
215 190
190 165
Harvest Cycle
Suction
Pressure
PSIG PSIG
70-95
70-100
75-100
80-100
85-115
215