Filter
Top Products
Section 7 Refrigeration System
Part Number 80-1559-3 7-19
Cycle Time/24 Hour Ice Production/
Refrigerant Pressure Charts
These charts are used as guidelines to verify correct ice
machine operation.
Accurate collection of data is essential to obtain the
correct diagnosis.
• Refer to “OPERATIONAL ANALYSIS TABLE” for the
list of data that must be collected for refrigeration
diagnostics. This list includes: before beginning
service, ice production check, installation/visual
inspection, water system checklist, ice formation
pattern, safety limits, comparing evaporator inlet/
outlet temperatures, discharge and suction pressure
analysis.
• Ice production checks that are within 10% of the
chart are considered normal. This is due to variances
in water and air temperature. Actual temperatures
will seldom match the chart exactly.
• Zero out manifold gauge set before obtaining
pressure readings to avoid misdiagnosis.
• Discharge and suction pressure are highest at the
beginning of the cycle. Suction pressure will drop
throughout the cycle. Verify the pressures are within
the range indicated.
• Record beginning of freeze cycle suction pressure
one minute after water pump energizes.
• 50Hz production derate is 7%
S1000 SERIES
Self-Contained Water-Cooled
NOTE: These characteristics may vary depending on
operating conditions.
Cycle Times
Freeze Time + Harvest Time = Total Cycle Time
24 Hour Ice Production
Operating Pressures
Air Temp.
Around Ice
Machine
°F/°C
Freeze Time
Harvest
Time
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 6.8-7.9 7.4-8.6 8.5-9.8
.75-2.00
80/26.7 6.9-8.0 7.5-8.7 8.6-9.9
90/32.2 6.9-8.1 7.6-8.8 8.7-10.1
100/37.8 7.0-8.1 7.7-8.9 8.9-10.2
Times in minutes
Air Temp.
Around Ice
Machine
°F/°C
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
70/21.1 1000 930 830
80/26.7 990 920 820
90/32.2 980 910 810
100/37.8 970 900 800
Based on average ice slab weight of 5.75- 6.50lb
Condenser
Water
Consumption
90/32.2 Air Temperature
Around Ice Machine
Water Temperature °F/°C
50/10.0 70/21.1 90/32.2
Gal/24 hours 710 1500 5100
Water regulating valve set to maintain 240 PSIG discharge pressure
Air Temp.
Around Ice
Machine
°F/°C
Freeze Cycle Harvest Cycle
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
Discharge
Pressure
PSIG
Suction
Pressure
PSIG
50/10.0
235-245 40-24 160-175 75-90
70/21.1 235-245 40-25 160-175 75-90
80/26.7 235-250 42-26 170-185 80-95
90/32.2 240-270 48-28 175-205 85-105
100/37.8 250-280 52-28 180-210 90-110
110/43.3 250-285 54-28 185-215 95-115
Suction pressure drops gradually throughout the freeze cycle