Carrier 48FC N20 Series Packaged Rooftop Manuals

Manuals and User Guides for Carrier 48FC N20 Series Packaged Rooftop. We have 1 Carrier 48FC N20 Series Packaged Rooftop manual available for free PDF download: Service And Maintenance Instructions

Carrier 48FC N20 Series Service And Maintenance Instructions (120 pages)

Single Package Rooftop Gas Heat/Electric Cooling Unit with Puron (R-410A) Refrigerant 17.5-27.5 Nominal Tons

Brand: Carrier | Category: Air Handlers | Size: 19 MB

Table of Contents
1
Safety Considerations
2
Unit Arrangement and Access
3
General
3
Routine Maintenance
3
Filters
3
Supply Fan (Blower) Section
4
Supply Fan (Direct-Drive)
4
Staged Air Volume
13
Cooling
13
Condenser Coil
13
Condenser Coil Maintenance and Cleaning
13
Recommendation
13
Evaporator Coil
15
Evaporator Coil Metering Devices
15
Thermostatic Expansion Valve (Txv)
15
TXV Operation
15
Replacing TXV
15
Refrigerant System Pressure Access Ports
16
Puron (R-410A) Refrigerant
17
Refrigerant Charge
17
Compressor
26
Lubrication
26
Replacing Compressor
26
Compressor Rotation
26
Filter Drier
26
Condenser-Fan Adjustment
26
Troubleshooting Cooling System
27
Convenience Outlets
28
Installing Weatherproof Cover
28
Non-Powered Type
28
Unit-Powered Type
28
Duty Cycle
29
Maintenance
29
Fuse on Powered Type
29
Smoke Detectors
29
System
29
Controller
29
Smoke Detector Sensor
29
Smoke Detector Locations
30
FIOP Smoke Detector Wiring and Response
31
Sensor and Controller Tests
32
Sensor Alarm Test
32
Controller Alarm Test
32
Dirty Controller Test
32
Dirty Sensor Test
33
Changing the Dirt Sensor Test
33
Remote Station Test
33
SD-TRK4 Remote Alarm Test Procedure
33
Remote Test/Reset Station Dirty Sensor Test
33
Dirty Sensor Test Using an SD-TRK4
34
Detector Cleaning
34
Indicators
34
Troubleshooting
35
Protective Devices
35
Compressor Protection
35
Relief Device
36
Control Circuit, 24-V
36
Gas Heating System
37
General
37
Fuel Types and Pressures
37
Flue Gas Passageways
38
Combustion-Air Blower
38
Burners and Igniters
38
Burner Ignition
42
Orifice Replacement
42
Troubleshooting Heating System
44
Systemvu Control System
46
Systemvu Interface
46
Additional Systemvu Installation and Troubleshooting
46
Economizer Systems
47
Economi$Er2
48
Economi$Er IV (Field-Installed Accessory)
49
Economi$Er X (Factory-Installed Option)
55
Pre-Start-Up/Start-Up
66
Start-Up, General
67
Unit Preparation
67
Additional Installation/Inspection
67
Gas Piping
67
Return-Air Filters
67
Outdoor-Air Inlet Screens
68
Compressor Mounting
68
Internal Wiring
68
Refrigerant Service Ports
68
Compressor Rotation
68
Cooling
68
Main Burner
68
Heating
68
Ventilation (Continuous Fan)
68
Fastener Torque Values
69
Start-Up, Systemvu Controls
69
Appendix A - Model Number Nomenclature
70
General Fan Performance Notes
74

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