Carrier 48LC 20 Manuals

Manuals and User Guides for Carrier 48LC 20. We have 2 Carrier 48LC 20 manuals available for free PDF download: Controls, Start-Up, Operation And Troubleshooting, Service And Maintenance Instructions

Carrier 48LC 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 48LC 20 Service And Maintenance Instructions (88 pages)

Single Package Rooftop Unit with Gas Heat/Electric Cooling with Puron (R-410A) Refrigerant

Brand: Carrier | Category: Air Conditioner | Size: 10.83 MB

Table of Contents
1
Safety Considerations
1
Unit Arrangement and Access
2
General
2
Routine Maintenance
3
Seasonal Maintenance
3
Supply Fan (Blower) Section
3
Supply Fan (Belt-Drive)
3
Cooling
5
Evaporator Coil
5
Refrigerant System Pressure Access Ports
6
Troubleshooting Cooling System
6
Puron® (R-410A) Refrigerant
8
Refrigerant Charge
8
Cooling Charging Charts
9
Compressors
14
Filter Drier
14
Condenser-Fan Adjustment
14
Convenience Outlets
14
Wet in Use Convenience Outlet Cover
15
Non-Powered Type
15
Unit-Powered Type
15
Maintenance
16
Fuse on Powered Type
16
Using Unit-Mounted Convenience Outlets
16
Smoke Detectors
16
System
16
Controller
16
Sensor
16
Smoke Detector Locations
17
FIOP Smoke Detector Wiring and Response
17
Sensor and Controller Tests
18
Detector Cleaning
20
Indicators
20
Troubleshooting
21
Protective Devices
21
Compressor Protection
21
Control Circuit, 24-V
22
Gas Heating System
22
General
22
Fuel Types and Pressures
22
Flue Gas Passageways
23
Combustion-Air Blower
23
Burners and Ignitors
23
Burner Ignition
26
Orifice Replacement
26
Minimum Heating Entering Air Temperature
30
Troubleshooting Heating System
30
Pre-Start-Up
32
Start-Up, General
32
Unit Preparation
32
Gas Piping
32
Return-Air Filters
32
Outdoor-Air Inlet Screens
33
Compressor Mounting
33
Internal Wiring
33
Refrigerant Service Ports
33
Compressor Rotation
33
Cooling
33
Main Burners
33
Heating
33
Ventilation (Continuous Fan)
33
RTU Open Control System
34
Systemvu™ (Factory Option)
34
Integrated Staging Control (ISC) Board
35
Economi$Er® X (Factory Option)
37
- Drive
  51
Multi-Speed VFD Display Kit
52
Fastener Torque Values
63
Sequence of Operation
63
General
63
Ventilation
64
Cooling
64
Economizer (Optional)
64
Low Ambient Cooling Operation down to 40°F
64
- (4°C)
  64
Heating
65
- Appendix A - Model Number
  66
- Nomenclature
  66
Appendix B - Physical Data
67
Appendix C - Fan Performance
70
Appendix D - Wiring Diagrams
81
Start-Up Checklist
87

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