Carrier 48JK048 Manuals

Manuals and User Guides for Carrier 48JK048. We have 2 Carrier 48JK048 manuals available for free PDF download: Operating And Troubleshooting Manual, Controls Operation And Troubleshooting

Carrier 48JK048 Operating And Troubleshooting Manual (64 pages)

Variable-Air Volume Rooftop Units

Brand: Carrier | Category: Air Conditioner | Size: 2.12 MB

Table of Contents
1
Circuit 2
1
General
2
Rooftop Information
2
Safety Considerations
2
VAV Control System
2
Processor Board
3
Display Board
5
Relay Board
5
Thermistors
5
- T1 - Supply-Air Temperature Thermistor
  5
- T2 - Return-Air Temperature Thermistor
  5
Accessory Board
7
- P3 - Reset Limit
  7
Compressor Operation
7
Demand Limit Control Module (DLCM)
7
Single-Step Demand Unit
7
Economizer
10
- Enthalpy Control
  10
- Differential Enthalpy
  10
High Capacity Modulating Power Exhaust Variable Frequency Drive
12
Supply Fan Variable Frequency Drive (VFD)
12
- Configuration
  13
- Installation
  18
Control Wiring
13
- Night Setback Thermostat
  13
- Space Temperature Reset Accessory (50Dj900021)
  13
Controls Installation
13
Space Temperature Reset
13
Temperature Reset
13
Demand Limit
18
- Single-Step Demand Limit
  19
- Operating Sequence
  19
Control from Remote Building Management
19
- Installation
  19
- Night Setback Control
  19
- Occupied/Unoccupied
  19
- Supply Duct Pressure Set Point Adjustment
  19
- System (BMS)
  19
- Two-Step Demand Limit
  19
- Unit Supply Air Set Point Adjustment
  19
  - Configuration
    20
  - Installation
    20
  - Single-Step Demand Limit
    20
  - Operating Sequence
    21
  - Configuration
    22
- Fire Shutdown Mode
  22
- Installation
  22
- Operating Sequence
  22
- Pressurization Mode
  22
- Smoke Purge Mode
  22
Smoke Control Modes
21
Air Pressure Tubing
23
- Inlet Guide Vanes
  23
- Supply Fan Variable Frequency Drive
  23
- Configuration
  23
- Modulating Power Exhaust
  25
Configuration
25
Initial Check
25
Installation
25
Start-Up
25
Configuration Header
26
DIP Switches
26
- Single-Step Demand Limit
  26
- Two-Step Demand Limit
  26
Adjusting Set Points
27
Potentiometers
27
Single-Step Demand Limit
27
Supply Fan Control with IGV Option
28
Supply Fan Control with VFD Option
28
Installation
29
High Capacity Power Exhaust (48FM and 50FM,FS Units)
30
Modulating Power Exhaust Option or Accessory) (48FK,JK and 50FK,JK Units)
30
Configuration
31
Quick Test Program
31
Start Unit
31
Digital Display
34
- Codes 20 through 30 and 88, Operational Status
  34
- Codes 51 through 87, Diagnostic Information
  34
  - Single-Step Demand Limit
    34
  - Operating Sequence
    34
Operating Information
34
Operating Sequence
35
Head Pressure Control
36
High Capacity Modulating Power Exhaust (48FM and 50FM,FS Units)
38
Modulating Power Exhaust (48FK,JK and 50FK,JK Units Option or Accessory)
38
Supply Fan Control with IGV
38
Supply Fan Control with VFD
38
Unit Staging
38

Carrier 48JK048 Controls Operation And Troubleshooting (60 pages)

Variable-Air Volume Rooftop Units

Brand: Carrier | Category: Air Conditioner | Size: 1.91 MB

Table of Contents
1
Circuit 2
1
General
2
Processor Board
2
- P3 - Reset Limit
  5
- P4 - Demand Limit
  5
- Assembly
  5
Rooftop Information
2
Safety Considerations
2
VAV Control System
2
Display Board
5
Relay Board
5
Thermistors
5
- T1 - Supply-Air Temperature Thermistor
  5
  - T2 - Return-Air Temperature Thermistor
    5
  - T3 - Saturated Condensing Temperature
    5
Accessory Board
7
- P3 - Reset Limit
  7
Compressor Operation
7
Demand Limit Control Module (DLCM)
7
Single-Step Demand Unit
7
Economizer
10
- Enthalpy Control
  10
  - Differential Enthalpy
    10
Temperature Reset
12
- Controls Installation
  13
Variable Frequency Drive (VFD)
12
Control Wiring
13
- Night Setback Thermostat
  13
  - Space Temperature Reset Accessory
    13
Space Temperature Reset
13
INSTALLATION CONFIGURATION OPERATING SEQUENCE Demand Limit
18
- Operating Sequence
  19
Control from Remote Building Management
19
- System (BMS)
  19
- Occupied/Unoccupied
  19
- Supply Duct Pressure Set Point Adjustment
  19
- External Alarm Signal
  19
Smoke Control Modes
21
- Pressurization Mode
  22
- Smoke Purge Mode
  22
- Operating Sequence
  22
Air Pressure Tubing
23
Initial Check
25
Start-Up
25
Conﬁguration Header
26
DIP Switches
26
Adjusting Set Points
27
Potentiometers
27
Supply Fan Control with IGV Option
28
Supply Fan Control with VFD Option
28
Modulating Power Exhaust (Option or Accessory)
30
Quick Test Program
31
Start Unit
31
Digital Display
34
- Codes 20 through 30 and 88, Operational Status
  34
Operating Information
34
Operating Sequence
35
Head Pressure Control
36
Modulating Power Exhaust (Option or Accessory Except FY,JY Units)
38
Supply Fan Control with IGV
38
Supply Fan Control with VFD
38
Unit Staging
38
Checking Display Codes
44
Complete Unit Stoppage
44
Restart Procedure
44
Single Circuit Stoppage
44
Troubleshooting
44
Diagnostic Codes
45

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Carrier 48JK048 Operating And Troubleshooting Manual (64 pages)

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Carrier 48JK048 Controls Operation And Troubleshooting (60 pages)

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