Carrier 50LC 20 Manuals

Manuals and User Guides for Carrier 50LC 20. We have 2 Carrier 50LC 20 manuals available for free PDF download: Controls, Start-Up, Operation And Troubleshooting, Service And Maintenance Instructions

Carrier 50LC 20 Controls, Start-Up, Operation And Troubleshooting (164 pages)

Single Package Rooftop Units with SystemVu Controls Version 2.X and Puron R-410A Refrigerant

Brand: Carrier | Category: Air Conditioner | Size: 5.44 MB

Table of Contents
1
Safety Considerations
2
General
3
- Conventions Used in this Manual
  3
Basic Control Usage
3
Start-Up
6
- Unit Preparation
  6
- Refrigerant Service Ports
  6
- Crankcase Heater
  6
- Compressor Rotation
  6
- Power Supply
  6
- Internal Wiring
  6
- Evaporator Fan
  6
- Condenser Fans and Motors
  7
- Return- -Air Filters
  7
- Outdoor- -Air Inlet Screens
  7
- Accessory Installation
  7
- Gas Heat (48LC)
  8
Controls Quick Set- -Up
9
Service Test
11
- Independent Outputs
  11
- Fan Test
  11
- Cooling Test
  11
- Heating Test
  11
- Automatic Test
  12
Third Party Control
12
- Cooling/Heating Control
  12
- Dehumidification Control
  12
- Remote Occupancy
  12
- Remote Shutdown
  12
- Alarm Output
  12
- Economizer Damper Control
  12
Controls Operation
12
- Display Configuration
  12
- Unit Configuration
  13
- General Operation
  13
- Demand Determination
  14
- Occupancy Determination
  15
- Indoor Fan Operation
  16
- Cooling Operation
  17
- Optional Humidi- -Mizer
  19
- Dehumidification System
  19
- Indoor Fan Based Dehumidification
  22
- Heating Operation
  22
- Supply Air Tempering
  24
- Economizer Operation
  24
- Power Exhaust
  26
- Indoor Air Quality (IAQ)
  26
- Pre- -Occupancy Purge
  27
- Temperature Compensated Start
  27
- Linkage
  28
- Carrier Comfort Network R (CCN) Operation
  28
- Bacnet Network Operation
  28
- Alarm Handling
  28
Troubleshooting
28
- Complete Unit Stoppage
  29
- Restart Procedure
  29
- Faults and Alerts
  29
- Control Module Communication
  36
- Communication Failures
  36
- Cooling Troubleshooting
  37
- Humidi- -Mizer System Troubleshooting
  38
- Economizer Troubleshooting
  40
- Heating Troubleshooting
  41
- Phase Protection
  44
- Thermistor Troubleshooting
  44
- Sensor Trim
  44
- Transducer Troubleshooting
  44
Major System Components
49
APPENDIX A: Systemvut Controller Display
76
APPENDIX B: Systemvu Controller Text Point Reference
97
APPENDIX C: Navigatort Display
98
APPENDIX D: Systemvu Controller CCN Tables
117
APPENDIX E: Bacnet Points List
142
Control Set Point and Configuration Log
153
Unit Start-Up Checklist
163

Carrier 50LC 20 Service And Maintenance Instructions (84 pages)

Single Package Rooftop Cooling Only with Puron (R-410A) Refrigerant

Brand: Carrier | Category: Cooling boxes | Size: 11.17 MB

Table of Contents
1
Safety Considerations
1
General
2
Routine Maintenance
2
Supply Fan (Blower) Section
3
Supply Fan Assembly
3
Changing Fan Wheel Speed by Changing Pulleys
4
Cooling
5
Evaporator Coil
5
Coil Maintenance and Cleaning Recommendation
5
Evaporator Coil Metering Devices
6
Refrigerant System Pressure Access Ports
6
Puron® (R-410A) Refrigerant
6
Refrigerant Charge
6
Evacuation
7
Compressors
13
Condenser-Fan Adjustment
13
Troubleshooting Cooling System
13
Convenience Outlets
15
Wet in Use Convenience Outlet Cover
15
Duty Cycle
15
Non-Powered Type
15
Unit-Powered Type
15
Maintenance
17
Fuse on Powered Type
17
Using Unit-Mounted Convenience Outlets
17
Smoke Detectors
17
System
17
Controller
17
Sensor
17
Smoke Detector Locations
18
FIOP Smoke Detector Wiring and Response
19
Sensor and Controller Tests
19
Controller Alarm Test Procedure
20
Dirty Controller Test Procedure
20
Dirty Sensor Test Procedure
20
Changing the Dirty Sensor Test
20
To Configure the Dirty Sensor Test Operation
20
SD-TRK4 Remote Alarm Test Procedure
20
Detector Cleaning
21
Indicators
21
Resetting Alarm and Trouble Condition Trips
22
Troubleshooting
22
Protective Devices
22
Compressor Protection
22
Supply (Indoor) Fan Motor Protection
23
Condenser Fan Motor Protection
23
Control Circuit, 24-V
23
Electric Heaters
23
Single Point Boxes and Supplementary Fuses
24
Safety Devices
24
Low-Voltage Control Connections
25
Wiring Diagrams
25
Pre-Start-Up
31
Start-Up, General
31
Unit Preparation
31
Return-Air Filters
31
Outdoor-Air Inlet Screens
31
Compressor Mounting
31
Internal Wiring
31
Refrigerant Service Ports
31
Compressor Rotation
32
Cooling
32
Heating
32
Ventilation (Continuous Fan)
32
RTU Open Control System
34
Systemvu™ (Factory Option)
34
Integrated Staging Control (ISC) Board
34
Economi$Er X (Factory Option)
36
Drive
50
Multi-Speed VFD Display Kit
51
Fastener Torque Values
62
Sequence of Operation
62
General
62
Ventilation
63
Cooling
63
Economizer (Optional)
63
Low Ambient Cooling Operation down to 40°F
63
(4°C)
63
Heating
63
6Appendix a - Model Number Nomenclature
64
Appendix B - Physical Data
65
Appendix C - Fan Performance
72
Start-Up Checklist
83

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Carrier 50LC 20 Controls, Start-Up, Operation And Troubleshooting (164 pages)

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