U0140 Self-Contained Water-Cooled - Manitowoc STH042 7/15 Technician's Handbook

U0140 SELF-CONTAINED WATER-COOLED

NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
Air Temp.
Around Ice
Machine
°F/°C
70/21
80/27
90/32
100/38
110/43
Times in minutes
24 Hour Ice Production
Air Temp. Around Ice
Machine °F/°C
70/21
80/27
90/32
100/38
110/43
Based on average ice slab weight of 1.06 - 1.19 lb (481 – 540 g).
Regular cube derate is 7%
Water regulating valve set to maintain 230 PSIG discharge pressure
Condenser water usage = 185 gallons per 100 lbs of ice at 90°F/70°F
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
50/10
70/21
80/27
90/32
100/38
110/43
Suction pressure drops gradually throughout the freeze cycle
Part Number STH042 7/15
Freeze Time
Water Temperature °F/°C
50/10
9.8-11.2
10.2-11.7
11.8-13.4
13.0-14.8
14.6-16.5
Freeze Cycle
Discharge
Pressure
PSIG
225-235
225-235
225-240
225-245
225-245
225-245
70/21
11.2-12.8 13.0-14.8
11.8-13.4 13.8-15.6
13.0-14.8 15.5-17.5
15.5-17.5 17.6-19.9
17.6-19.9 20.3-23.0
Water Temperature °F/°C
50/10
135
130
115
105
95
Suction Discharge
Pressure Pressure
PSIG
55-22
65-24
65-24
65-24
70-25
70-26
Harvest
90/32
70/21
120
115
105
90
80
Harvest Cycle
Suction
Pressure
PSIG
135-155
145-160 100-130
145-165 100-130
145-165 110-130
150-175 115-140
150-180 115-145
Time
1.0-2.5
90/32
105
100
90
80
70
PSIG
90-115
125