Carrier 17/19EX Specifikace Strana 158
- Strana / 437
- Tabulka s obsahem
- ŘEŠENÍ PROBLÉMŮ
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Calculate Minimum Load
To calculate minimum load conditions, estimate the temperature difference that the cooler
will have at 20% 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) = 38 psig (262 kPa) saturated refrigerant pressure (HFC-134a)
Condensing Temperature:
70 F (21.1 C) = 71 psig (490 kPa) saturated refrigerant pressure (HFC-134a)
Minimum Load ∆T1 (at 20% Load):
2° F (1.1° C)
Minimum Load ∆P1:
71 – 38 = 33 psid (490 – 262 = 228 kPad)
Again, to avoid unnecessary surge prevention, add 20 psid (140 kPad) at ∆P1 from these
conditions:
∆T1 = 2° F (1.1° C)
∆P1 = 53 psid (368 kPad)
- Definitions 8
- Contents 10
- Weekly Maintenance 22
- Scheduled Maintenance 22
- Troubleshooting Guide 24
- List of Tables 27
- List of Figures 31
- Introduction 36
- Abbreviations 38
- Machine Identification Label 39
- System Components 39
- Motor-Compressor 40
- Control Center 40
- Refrigeration Cycle ( 41
- Figure 4 41
- Summary 44
- Details 45
- (EX Compressor Shown) 47
- Details (See 48
- Figure 6 48
- Starters 50
- Controls 50
- Volatile Memory 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
- Oil Auxiliary Relay (4C) 56
- Control Transformers (T1-T4) 56
- Figure 19, and Figure 20) 58
- Alarms and Alerts 59
- Menu Structure 61
- NEXT PREVIOUS SELECT EXIT 62
- Figure 18 63
- For Discrete Points 64
- Override Operations 65
- To Remove an Override 66
- Figure 19 67
- Figure 20 71
- PIC System Functions 74
- Deadband 75
- Proportional Bands and Gain 75
- Demand Limiting 76
- Machine Timers 76
- Occupancy Schedule 77
- Safety Controls 79
- Shunt Trip 80
- Default Screen Freeze 81
- Ramp Loading Control 82
- Capacity Override (See 83
- Oil Sump Temperature Control 85
- Oil Cooler 86
- Remote Start/Stop Controls 86
- Spare Safety Inputs 87
- Spare Alarm Contacts 87
- Condenser Pump Control 88
- Condenser Freeze Prevention 88
- Tower-Fan Relay 89
- Water/Brine Reset 91
- Surge Prevention Algorithm 93
- Surge Protection 95
- Lead/Lag Control 96
- Machine Communication Wiring 98
- Lead/Lag Operation 98
- Faulted Chiller Operation 102
- Load Balancing 103
- Ice Build Control 104
- Ice Build Initiation 105
- Start-Up/Recycle Operation 106
- Termination of Ice Build 107
- Service Operation 111
- To Log Off 112
- Holiday Scheduling ( 113
- Figure 24 113
- NEXT PREVIOUS SELECT EXIT 114
- INCREASE DECREASE QUIT ENTER 116
- Local Start-Up 118
- Shutdown Sequence 120
- COMPRESSOR MOTOR LOAD 121
- ENTERING CONDENSER WATER 121
- LEAVING CHILLED WATER 121
- CONTROL 121
- Chilled Water Recycle Mode 122
- Safety Shutdown 124
- Before Initial Start-Up 125
- Remove Shipping Packaging 126
- Open Oil Circuit Valves 129
- Torque All Gasketed Joints 129
- Check Machine Tightness 129
- Refrigerant Tracer 130
- Leak Test Machine 130
- Standing Vacuum Test 134
- Machine Dehydration 135
- Inspect Water Piping 137
- Check Relief Devices 138
- Inspect Wiring 139
- 0- 900 500 142
- 901- 7000 1000 142
- 7001-14500 2500 142
- Check Starter 147
- Mechanical-Type Starters 148
- Solid-State Starters 149
- Oil Charge 150
- Software Version 151
- Input the Design Set Points 152
- Input Service Configurations 153
- At low loads (<50%) 159
- At high loads (>50%) 159
- Check Voltage Supply 160
- High Altitude Locations 163
- Trimming Refrigerant Charge 165
- Initial Start-Up 166
- TARGET GUIDE 167
- VANE POSITION 167
- TARGET GUIDE VANE POSITION 167
- If Rotation Is Proper 174
- Cooler-Condenser 178
- Utility Vessel 178
- Pumpout System 178
- Operating Instructions 180
- To Start the Machine 181
- Check the Running System 181
- To Stop the Machine 183
- After Limited Shutdown 184
- Extended Shutdown 184
- After Extended Shutdown 184
- Cold Weather Operation 185
- Manual Guide Vane Operation 185
- Refrigeration Log 186
- Preparation 187
- To Read Refrigerant Pressures 188
- (12-ft Vessel Shown) 188
- 1 2 3 4 5 6 7 8 9 10 11 189
- C C CCCCC 190
- Compressor Section 191
- CC CCCCC 192
- C CC CCCC C 193
- Condition 194
- General Maintenance 195
- Adding Refrigerant 196
- Removing Refrigerant 196
- Refrigerant Leak Testing 197
- Leak Rate 197
- Figure 35 199
- Seal Disassembly ( 201
- Figure 36 201
- Handle carefully 202
- Protect seal faces of ring 202
- Seal Reassembly ( 203
- Alignment Methods 205
- Preliminary Alignment 207
- Near Final Alignment 208
- Measurement 211
- Adjustment 213
- Final Alignment 217
- Hot Alignment Check 217
- Doweling 220
- Changing Oil Filter 224
- FA Style Compressors 225
- Oil Changes 226
- Oil Specification 226
- Refrigerant Filter 227
- Oil Reclaim Filter 228
- Procedure 229
- Cleanliness 231
- Sleeve Bearings 235
- Open-Drive Motor Storage 244
- Condenser 247
- Check Pressure Transducers 251
- Pumpout System Maintenance 251
- Figure 47 252
- Checking Temperature Sensors 255
- Resistance Check 256
- Voltage Drop 256
- Check Sensor Accuracy 257
- Dual Temperature Sensors 257
- Checking Pressure Transducers 258
- Figure 48 261
- Troubleshooting Transducers 262
- Transducer Replacement 262
- Control Test 264
- Control Modules 267
- Green LEDs 268
- Other Green LED 269
- Green LED 269
- Notes on Module Operation 270
- Options Modules (8-Input) 274
- Table 2 — LID Screens 284
- Table 4 — Capacity Overrides 302
- Table 6 — Recommended Torque 307
- B. Timing Out or Timed Out 311
- C. In Recycle Shutdown 312
- D. Pre-Start Alerts: 313
- E. Normal or AUTO.-RESTART 314
- F. Start-Up Failures: 315
- (Continued) 316
- L. Machine Alerts 324
- L. Machine Alerts (Continued) 325
- (Page 1 of 2) 333
- (English) 336
- 150 1034 2236 1015 1275 579 338
- 300 2068 3060 1389 1660 754 338
- 150 1034 – – 1643 746 338
- 300 2068 – – 2243 1018 338
- Compressor End View 353
- Machine Front View 354
- Motor End View 355
- Machine Rear View 359
- (Open-Drive Machine Shown) 365
- (Status01) 371
- Figure 25 — Control Sequence 378
- Figure 31 — Refrigeration Log 384
- Figure 40 — Alignment Formula 394
- To Check Angular Alignment 399
- To Check Parallel Alignment 400
- Figure 53 — Options Module 410
- Size (See Figure 1 Also) 411
- Note: See Table 17 414
- Open Drive Machine 420
- (Remove and use for job file.) 426
- MACHINE INFORMATION: 426
- INSTRUCTIONS 426
- CENTRIFUGAL LIQUID CHILLER 428
- CONFIGURATION SETTINGS LOG 428
- MACHINE ALIGNMENT REPORT 437
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