Carrier 19XL Spezifikationen Seite 159
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Calculate Minimum Load
To calculate minimum load conditions, estimate the temperature difference that the cooler
will have at 10% load, then estimate what the suction and condensing temperatures will be at
this point. Use the proper saturated pressure and temperature for the particular refrigerant
used.
Suction Temperature:
43 F (6.1 C) = 73 psig (503 kPa) saturated refrigerant pressure (HCFC-22)
Condensing Temperature:
70 F (21.1 C) = 121 psig (834 kPa) saturated refrigerant pressure (HCFC-22)
Minimum Load ∆T1:
45.5 – 44 = 1.5° F (7.5 – 6.7 = 0.8° C)
Minimum Load ∆P1:
121 – 73 = 45 psid (834 – 503 = 331 kPad)
Again, to avoid unnecessary surge prevention, add 10 psid (70 kPad) at ∆P1 from these
conditions:
∆T1 = 1.5 F (0.8 C)
∆P1 = 60 psid (410 kPad)
- 19XL 1
- 50/60 Hz 1
- Analog Signal 8
- Contents 10
- Initial Start-Up 17
- List of Tables 26
- List of Figures 30
- Introduction 35
- Machine Familiarization 38
- Motor-Compressor 39
- Control Center 39
- Storage Vessel (Optional) 39
- Refrigeration Cycle 40
- Design I 42
- Design II 42
- Lubrication Cycle 43
- Oil Reclaim System 45
- During Light Load Conditions 46
- Starting Equipment 47
- Controls 51
- PIC System Components 52
- Processor Module (PSIO) 53
- Local Interface Device (LID) 54
- 6-Pack Relay Board 55
- 8-Input Modules 55
- Oil Heater Contactor (1C) 55
- Oil Pump Contactor (2C) 55
- General 57
- Alarms and Alerts 58
- Menu Structure 59
- To View Point Status ( 61
- Figure 15 61
- Override Operations 63
- For Discrete Points 64
- For Analog Points 64
- Time Schedule Operation ( 66
- Figure 18 66
- Figure 19 70
- PIC System Functions 74
- Deadband 75
- Proportional Bands and Gain 75
- Demand Limiting 76
- Machine Timers 76
- Occupancy Schedule 77
- Safety Controls 79
- (and figure following table) 80
- Default Screen Freeze 81
- Motor Cooling Control 81
- Ramp Loading Control 82
- Capacity Override (Table 4) 83
- Oil Sump Temperature Control 84
- Oil Cooler 85
- Remote Start/Stop Controls 86
- Spare Safety Inputs 86
- Condenser Pump Control 87
- Condenser Freeze Prevention 88
- Tower-Fan Relay 88
- TOWER FAN RELAY 89
- CONDENSER WATER PUMP 89
- Water/Brine Reset 90
- Surge Prevention Algorithm 93
- Surge Protection 95
- Lead/Lag Control 96
- Machine Communication Wiring 98
- Lead/Lag Operation 98
- Faulted Chiller Operation 103
- Load Balancing 104
- Ice Build Control 105
- Ice Build Initiation 106
- Start-Up/Recycle Operation 107
- Termination Of Ice Build 108
- Changing Refrigerant Types 111
- Service Operation 113
- To Log Off 114
- Holiday Scheduling ( 114
- Figure 23 114
- Local Start-Up 119
- Shutdown Sequence 120
- CONDENSER REFRIGERANT TEMP 121
- CONDENSER PRESSURE OVERRIDE 121
- COMPRESSOR MOTOR LOAD 121
- ENTERING CONDENSER WATER 121
- Higher) 122
- Chilled Water Recycle Mode 122
- Safety Shutdown 124
- Before Initial Start-Up 125
- Remove Shipping Packaging 126
- Open Oil Circuit Valves 126
- Torque All Gasketed Joints 126
- Check Machine Tightness 127
- Refrigerant Tracer 127
- Leak Test Machine 128
- Standing Vacuum Test 131
- Storage Tank 132
- Machine Dehydration 133
- Inspect Water Piping 136
- Check Starter 142
- Mechanical-Type Starters 143
- Oil Charge 150
- Software Version 152
- Input the Design Set Points 153
- Selecting Refrigerant Type 153
- Input Service Configurations 154
- Input Time and Date 155
- Occdef Table Modifications 161
- Holidef Table Modifications 161
- Brodefs Table Modifications 161
- Other Tables 161
- Check Voltage Supply 162
- High Altitude Locations 164
- Initial Start-up 169
- TARGET GUIDE 171
- VANE POSITION 171
- TARGET GUIDE VANE POSITION 171
- Check Rotation 172
- Cooler-Condenser 175
- Operating Instructions 177
- To Start the Machine 178
- Check the Running System 178
- To Stop the Machine 180
- After Limited Shutdown 180
- Extended Shutdown 181
- After Extended Shutdown 181
- Cold Weather Operation 182
- Manual Guide Vane Operation 182
- Refrigeration Log 183
- Preparation 184
- Machines with Storage Tanks 185
- CCCCCCCCC 188
- 1a 1b 2 3 4 5 8 11 12 13 14 192
- C CCCC C C 193
- CCCCCCCCCCC 193
- CC CCCCC 194
- C CCCCC C C 196
- General Maintenance 198
- Adding Refrigerant 199
- Removing Refrigerant 199
- Refrigerant Leak Testing 200
- Leak Rate 200
- Checking Guide Vane Linkage 202
- Trim Refrigerant Charge 203
- Weekly Maintenance 204
- Scheduled Maintenance 205
- Changing Oil Filter 206
- Oil Specification 208
- Oil Changes 208
- Refrigerant Filter 209
- Oil Reclaim Filters 210
- Replace the 211
- Condenser 212
- Water Leaks 213
- Water Treatment 214
- Check Pressure Transducers 216
- Figure 40 218
- Troubleshooting Guide 219
- Checking the Display Messages 220
- Checking Temperature Sensors 220
- Voltage Drop 221
- Check Sensor Accuracy 221
- Dual Temperature Sensors 222
- Transducer Replacement 225
- Control Test 227
- Control Modules 230
- Red Led 231
- Green LEDs 231
- Other Green LED 232
- Green LED 232
- Notes on Module Operation 233
- Figure 44) 236
- Options Modules (8-Input) 237
- Installation 239
- Solid-State Starters 241
- (Internal View) 245
- Physical Data 248
- Wiring Schematic 250
- Schematic 250
- Pic Component Panel Location 251
- Table 2 — LID Screens 252
- Volt/ Hz 279
- Motor Code 279
- CD CE CL CM CN CP CQ CR 279
- Legend For Table 10, A - N 283
- Table 10L — Machine Alerts 297
- Table 13 — Cutler-Hammer 309
- Component 312
- 19EA47-748 575-3-60 13.8 23.0 316
- 19EA44-748 230-3-60 19.5 57.5 316
- Components — Design I 319
- Components — Design II 321
- Figure 3 — Refrigerant Motor 322
- Figure 4 — Lubrication System 323
- Internal View 324
- (Solid-State Starter Shown) 326
- Figure 9 — Control Sensors 328
- (Temperature) 328
- Figure 10 — Control Sensors 329
- Screen (Status01) 334
- Figure 18 — Example of Time 337
- Schedule Operation Screen 337
- Figure 19 — Example of 338
- Set Point Screen 338
- Figure 20 — 19XL Hot Gas 339
- Bypass/Surge Prevention 339
- Metric Settings 340
- Figure 23 — Example of 342
- Holiday Period Screen 342
- Figure 24 — Control Sequence 343
- Figure 25 — Typical Wet-Bulb 344
- Type Vacuum Indicator 344
- Starter Power Stack 349
- Torque Potentiometers 350
- Adjustment 351
- Solid-State Starter 352
- Figure 35 — Refrigeration Log 354
- Figure 36 — 19XL Pumpout 355
- Unit Wiring Schematic 355
- Figure 38 — Guide Vane 357
- Actuator Linkage 357
- Figure 39 — 19XL Float 358
- Valve Designs 358
- Figure 40 — Optional Pumpout 359
- System Controls 359
- LED Locations 360
- Figure 43 — Processor (PSIO) 362
- Figure 44 — Starter 363
- Management Module 363
- Figure 45 — Options Module 364
- Figure 47 — Resistance Check 366
- ® Terminal Functions 369
- Compressor Assembly Torques 372
- Carrier Factory Wiring 375
- Optional (Factory or 375
- Field-Installed) Wiring 375
- Starter Cabinet Wiring 377
- Field Wiring 377
- Schematic (page 2 of 2) 378
- (Remove and use for job file.) 381
- MACHINE INFORMATION: 381
- INSTRUCTIONS 381
- CONFIGURATION SETTINGS LOG 383
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