Carrier 23XL - Page 99

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Fig. 49 — Benshaw, Inc. Solid-State Unit Mounted Starter Wiring Schematic (Low Voltage)

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Safety Considerations1
- Table of Contents2
- Reset Type2
Introduction4
Abbreviations and Explanations5
23Xl Chiller Familiarization5
Chiller Identification Nameplate5
System Components5
Cooler8
Condenser8
Motor-Compressor8
Muffler-Oil Separator8
Control Panel8
Factory-Mounted Starter (Optional Accessory)8
Storage Vessel (Optional)8
Refrigeration Cycle8
Motor Cooling Cycle8
Lubrication Cycle8
- Tc Frame 1 and 2 Chillers9
- Td Frame 4 Chillers9
Oil Reclaim System9
Oil Loss Prevention9
Slide Valve Principle12
Starting Equipment12
Unit Mounted Solid-State Starter (Optional)13
Unit Mounted Wye-Delta Starter (Optional)13
Controls14
Definitions14
- Analog Signal14
General Controls Overview14
PIC II System Components14
- Chiller Visual Controller (CVC)14
- Integrated Starter Module (Ism)14
- Chiller Control Module (CCM)14
- Oil Heater Contactor (1C)14
- Hot Gas Bypass Contactor Relay (3C)17
CVC Operation and Menus19
- General19
- Alarms and Alerts19
- CVC Menu Items19
- BASIC CVC OPERATIONS (Using the Softkeys)19
- To View Status20
- Override Operations20
- Alarms and Alerts22
- Time Schedule Operation24
- To View and Change Set Points25
- Service Operation25
- Alarms and Alerts26
PIC II System Functions37
- Capacity Control37
- Control Point Deadband37
- Proportional Bands and Gain37
- Demand Limiting37
- Chiller Timers37
- Occupancy Schedule37
Safety Controls38
Shunt Trip (Option)38
Default Screen Freeze38
Ramp Loading38
Capacity Override38
Low Discharge Temperature Control39
Oil Sump Temperature Control TC39
- (Frame 1 and 2) Chillers Only39
Remote Start/Stop Controls40
Spare Safety Inputs40
Spare Safety Alarm Contacts40
Refrigerant Leak Detector40
Condenser Pump Control40
Condenser Freeze Protection40
Tower Fan Relay Low and High40
Auto. Restart after Power Failure41
Water/Brine Reset41
Demand Limit Control Option41
Hot Gas Bypass (Optional) Algorithm (See41
- Head Pressure Output Reference42
Lead/Lag Control42
- Common Point Sensor Installation42
- Chiller Communication Wiring43
- Lead/Lag Operation43
- Faulted Chiller Operation44
- Load Balancing44
- Auto. Restart after Power Failure44
Ice Build Control44
- Ice Build Initiation45
- Start-Up/Recycle Operation45
- Temperature Control During Ice Build45
- Termination of Ice Build45
- Return to Non-Ice Build Operations45
Attach to Network Device Control45
- Attaching to Other Ccn Modules46
Service Operation46
- To Access the Service Screens46
- To Log out of Network Device46
- Holiday Scheduling46
Controls47
Start-Up/Shutdown/Recycle47
- Sequence47
Local Start-Up47
Shutdown Sequence48
Automatic Soft Stop Amps Threshold48
Chilled Water Recycle Mode49
Safety Shutdown49
Before Initial Start-Up49
Job Data Required49
Equipment Required49
Using the Optional Storage Tank49
- And Pumpout System49
Remove Shipping Packaging49
Open Oil Circuit Valves49
Tighten All Gasketed Joints49
Leak Test Chiller50
Chiller Dehydration58
Inspect Water Piping58
Check Optional Pumpout Compressor58
- Water Piping58
Check Relief Valves58
Inspect Wiring58
Carrier Comfort Network Interface59
Check Starter59
- Mechanical Starter59
- Benshaw, Inc. Redistart Micro Solid-State Starter60
Oil Charge60
Password61
If Necessary62
Perform a Control Test63
Charge Refrigerant into Chiller64
- Initial Start-Up65
- Initial Start-Up66
To Stop the Chiller67
Procedures69
Chillers with Isolation Valves70
Procedures71
General Maintenance72
Weekly Maintenance73
Oil Specification74
Compressor Bearing Maintenance75
Check Pressure Transducers76
Checking Pressure Transducers77
- Cooler Condenser Pressure Transducer and Waterside Flow Device Calibration77
Checking Temperature Sensors77
- Transducer Replacement78
Control Algorithms Checkout Procedure78
Control Test78
Troubleshooting Guide79
Chiller Protect Limit Faults82
Control Modules88
- RED LED (Labeled as STAT)88
- GREEN LED (Labeled as COM)88
Notes on Module Operation88
Chiller Control Module (CCM)89
Integrated Starter Module (ISM)89
Replacing Defective Processor Modules89
- Installation89
Solid-State Starters89
- Testing Silicon Control Rectifiers in Benshaw, Inc., Solid-State Starters89
- Scr Removal/Installation91
Physical Data92
Index104
Initial Start-Up Checklist for 23Xl Hermetic Screw105

Carrier 23XL - Page 99

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