Carrier 48JCR Manuals

Manuals and User Guides for Carrier 48JCR. We have 1 Carrier 48JCR manual available for free PDF download: Service And Maintenance Instructions

Carrier 48JCR Service And Maintenance Instructions (68 pages)

Single Package Rooftop Gas Heat/Electric Cooling Unit with Puron R-410A Refrigerant 3 to 5 Nominal Tons

Brand: Carrier | Category: Air Conditioner | Size: 7 MB

Table of Contents
1
Safety Considerations
2
Unit Arrangement and Access
3
General
3
Routine Maintenance
3
Quarterly Inspection (and 30 Days after Initial Start)
3
Filters
3
Manual Outside Air Hood Screen
4
Supply Fan (Blower) Section
4
Supply Fan (Direct-Drive)
4
Condenser Coil
8
Cooling
8
Condenser Coil Maintenance and Cleaning
8
Recommendation
8
Remove Surface Loaded Fibers
8
Periodic Clean Water Rinse
8
Routine Cleaning of Coil Surfaces
8
Evaporator Coil
10
Cleaning the Evaporator Coil
10
Thermostatic Expansion Valve (Txv)
10
TXV Operation
10
Replacing TXV
10
Refrigerant System Pressure Access Ports
11
Puron (R-410A) Refrigerant
12
Refrigerant Charge
12
Low-Charge Cooling
12
Cooling Charging Charts
12
Compressor
14
Lubrication
14
Replacing Compressor
14
Compressor Rotation
14
Filter Drier
14
Condenser-Fan Adjustment
14
Troubleshooting Cooling System
16
Convenience Outlets
17
Installing Weatherproof Cover
17
Non-Powered Type
17
Unit-Powered Type
17
Duty Cycle
18
Maintenance
18
Fuse on Powered Type
18
Using Unit-Mounted Convenience Outlets
18
Smoke Detectors
18
System
18
Controller
18
Smoke Detector Sensor
18
Smoke Detector Locations
19
Supply Air
19
Completing Installation of Return Air Smoke
20
Detector
20
FIOP Smoke Detector Wiring and Response
20
All Units
20
Using Remote Logic
20
Sensor and Controller Tests
21
Sensor Alarm Test
21
Controller Alarm Test
21
Dirty Controller Test
21
Dirty Sensor Test
21
Changing the Dirty Sensor Test
22
Remote Station Test
22
SD-TRK4 Remote Alarm Test Procedure
22
Remote Test/Reset Station Dirty Sensor Test
22
Dirty Sensor Test Using an SD-TRK4
22
Detector Cleaning
22
Indicators
23
Normal State
23
Alarm State
23
Troubleshooting
23
Protective Devices
24
Compressor Protection
24
Relief Device
24
Control Circuit, 24-V
24
Gas Heating System
24
General
24
Fuel Types and Pressures
25
Natural Gas
25
Liquid Propane
25
Flue Gas Passageways
25
Combustion-Air Blower
25
Burners and Igniters
26
Main Burners
26
Cleaning and Adjustment
27
Removing the Heat Exchanger
29
Gas Valve
29
Limit Switch
29
Burner Ignition
29
Orifice Replacement
29
Troubleshooting Heating System
32
Reset Method
33
Systemvu Control System
34
Systemvu Interface
34
Air Temperature Sensors
34
Additional Systemvu Installation and  Troubleshooting
34
Compressor Vfd
36
Drive Board
36
Converter Board
37
Fault Description
39
Filter Board
41
Capacitor Board
42
Electrical Shock Hazard
42
Line Reactor
42
Economizer System
43
Economi$Er2
43
Pre-Start-Up/Start-Up
44
Start-Up, General
44
Unit Preparation
44
Additional Installation/Inspection
44
Gas Piping
44
Return-Air Filters
45
Outdoor-Air Inlet Screens
45
Compressor Mounting
45
Internal Wiring
45
Refrigerant Service Ports
45
Compressor Rotation
45
Cooling
45
Main Burner
45
Heating
46
Fastener Torque Values
46
Appendix A - Model Number Nomenclature
47
Appendix B - Physical Data
48
Appendix C - Fan Performance
50
Appendix D - Wiring Diagrams
63
Preliminary Information
67
Pre-Start-Up
67
Humidi-Mizer
68

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Carrier 48JCR Service And Maintenance Instructions (68 pages)

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