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Refrigeration System Section 7
7-22 Part No. 80-1100-3
DISCHARGE LINE TEMPERATURE ANALYSIS
General
Knowing if the discharge line temperature is increasing,
decreasing or remaining constant can be an important
diagnostic tool. Maximum compressor discharge line
temperature on a normally operating ice machine
steadily increases throughout the freeze cycle.
Comparing the temperatures over several cycles will
result in a consistent maximum discharge line
temperature.
Ambient air temperatures affect the maximum discharge
line temperature.
Higher ambient air temperatures at the condenser =
higher discharge line temperatures at the compressor.
Lower ambient air temperatures at the condenser =
lower discharge line temperatures at the compressor.
Regardless of ambient temperature, the freeze cycle
discharge line temperature will be higher than 160°F
(71.1°C) on a normally operating ice machine.
Procedure
Connect a temperature probe on the compressor
discharge line with-in 6" of the compressor and insulate.
Observe the discharge line temperature for the last three
minutes of the freeze cycle and record the maximum
discharge line temperature.
Discharge Line Temperature Above 160°F (71.1°C) At
End Of Freeze Cycle:
Ice machines that are operating normally will have
consistent maximum discharge line temperatures above
160°F (71.1°C).
Discharge Line Temperature Below 160°F (71.1°C) At
End Of Freeze Cycle
Ice machines that have a flooding expansion valve will
have a maximum discharge line temperature that
decreases each cycle.
Verify the expansion valve sensing bulb is 100%
insulated and sealed airtight. Condenser air contacting
an incorrectly insulated sensing bulb will cause
overfeeding of the expansion valve.
Verify the expansion valve sensing bulb is positioned
and secured correctly.
- ICE MACHINES 1
- Safety Notices 2
- Procedural Notices 2
- MANITOWOC ICE, INC 4
- Table of Contents 5
- 2 Part No. 80-1100-3 6
- 4 Part No. 80-1100-3 8
- Table of Contents (continued) 10
- 6 Part No. 80-1100-3 10
- Section 1 11
- General Information 11
- General Information Section 1 12
- 1-2 Part No. 80-1100-3 12
- Model/Serial Number Location 12
- Section 1 General Information 13
- Warranty Coverage 13
- 1-4 Part No. 80-1100-3 14
- Section 2 15
- Installation Instructions 15
- 2-2 Part No. 80-1100-3 16
- Ice Storage Bin Dimensions 17
- 2-4 Part No. 80-1100-3 18
- Remote Condenser Dimensions 18
- 2-6 Part No. 80-1100-3 20
- Leveling the Ice Storage Bin 20
- Air-Cooled Baffle 20
- Electrical Service 21
- 2-8 Part No. 80-1100-3 22
- For United Kingdom Only 23
- 2-10 Part No. 80-1100-3 24
- Cooling Tower Applications 25
- (Water-Cooled Models) 25
- 2-12 Part No. 80-1100-3 26
- 2-14 Part No. 80-1100-3 28
- Part No. 80-1100-3 2-15 29
- 2-16 Part No. 80-1100-3 30
- 2-18 Part No. 80-1100-3 32
- Installation Check List 33
- 2-20 Part No. 80-1100-3 34
- Section 3 35
- Maintenance 35
- Operational Checks 36
- Maintenance Section 3 36
- 3-2 Part No. 80-1100-3 36
- Section 3 Maintenance 37
- Cleaning the Condenser 37
- 3-4 Part No. 80-1100-3 38
- 3-6 Part No. 80-1100-3 40
- 3-8 Part No. 80-1100-3 42
- 3-10 Part No. 80-1100-3 44
- 3-12 Part No. 80-1100-3 46
- 3-14 Part No. 80-1100-3 48
- Water Treatment/Filtration 48
- 3-16 Part No. 80-1100-3 50
- Section 4 51
- 4-2 Part No. 80-1100-3 52
- Part No. 80-1100-3 4-3 53
- 4-4 Part No. 80-1100-3 54
- Section 5 55
- 5-2 Part No. 80-1100-3 56
- Section 6 57
- Electrical System 57
- 6-2 Part No. 80-1100-3 58
- AUTOMATIC 58
- Wiring Diagram Sequence of 59
- Operation 59
- 6-4 Part No. 80-1100-3 60
- 6-6 Part No. 80-1100-3 62
- 6-8 Part No. 80-1100-3 64
- 6-10 Part No. 80-1100-3 66
- 6-12 Part No. 80-1100-3 68
- 6-14 Part No. 80-1100-3 70
- 6-16 Part No. 80-1100-3 72
- Wiring Diagrams 73
- 6-18 Part No. 80-1100-3 74
- 6-20 Part No. 80-1100-3 76
- 6-22 Part No. 80-1100-3 78
- 6-24 Part No. 80-1100-3 80
- 6-26 Part No. 80-1100-3 82
- 6-28 Part No. 80-1100-3 84
- 6-30 Part No. 80-1100-3 86
- 6-32 Part No. 80-1100-3 88
- 6-34 Part No. 80-1100-3 90
- 6-36 Part No. 80-1100-3 92
- 6-38 Part No. 80-1100-3 94
- 6-40 Part No. 80-1100-3 96
- 6-42 Part No. 80-1100-3 98
- Electrical System Section 6 100
- 6-44 Part No. 80-1100-3 100
- Section 6 Electrical System 101
- 6-46 Part No. 80-1100-3 102
- 6-48 Part No. 80-1100-3 104
- Water Level Control Circuitry 106
- 6-50 Part No. 80-1100-3 106
- 6-52 Part No. 80-1100-3 108
- 6-54 Part No. 80-1100-3 110
- 6-56 Part No. 80-1100-3 112
- Section 7 113
- Refrigeration System 113
- 7-2 Part No. 80-1100-3 114
- Part No. 80-1100-3 7-3 115
- °F (21.1°C) 115
- 7-4 Part No. 80-1100-3 116
- Part No. 80-1100-3 7-5 117
- 7-6 Part No. 80-1100-3 118
- SOLENOID 119
- EVAPORATOR 119
- 7-8 Part No. 80-1100-3 120
- Important 121
- 7-10 Part No. 80-1100-3 122
- 7-12 Part No. 80-1100-3 124
- Part No. 80-1100-3 7-13 125
- 7-14 Part No. 80-1100-3 126
- 7-16 Part No. 80-1100-3 128
- 7-18 Part No. 80-1100-3 130
- 7-20 Part No. 80-1100-3 132
- 7-22 Part No. 80-1100-3 134
- Part No. 80-1100-3 7-23 135
- 7-24 Part No. 80-1100-3 136
- √) in the small boxes 136
- 7-26 Part No. 80-1100-3 138
- Part No. 80-1100-3 7-27 139
- 7-28 Part No. 80-1100-3 140
- Part No. 80-1100-3 7-29 141
- 7-30 Part No. 80-1100-3 142
- Part No. 80-1100-3 7-31 143
- 7-32 Part No. 80-1100-3 144
- Diagnostics 144
- Refrigerant Pressure Charts 145
- 7-34 Part No. 80-1100-3 146
- 7-36 Part No. 80-1100-3 148
- 7-38 Part No. 80-1100-3 150
- 7-40 Part No. 80-1100-3 152
- 7-42 Part No. 80-1100-3 154
- 7-44 Part No. 80-1100-3 156
- 7-46 Part No. 80-1100-3 158
- 7-48 Part No. 80-1100-3 160
- 7-50 Part No. 80-1100-3 162
- Part No. 80-1100-3 7-51 163
- 7-52 Part No. 80-1100-3 164
- 7-54 Part No. 80-1100-3 166
- 7-56 Part No. 80-1100-3 168
- 7-58 Part No. 80-1100-3 170
- 7-60 Part No. 80-1100-3 172
- Part No. 80-1100-3 7-61 173
- 7-62 Part No. 80-1100-3 174
- Part No. 80-1100-3 7-63 175
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