Carrier 39L Series - Page 8

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ARRANGEMENT FOR SIZES 03 AND 06

ARRANGEMENT FOR SIZES 08 THROUGH 35

Fig. 5 — PIC Section Control Box Component Arrangements, 39L

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Table of Contents1
All -In. through1
Safety Considerations2
General2
Installation2
Service Area Requirements2
Remote Control Box Option2
- Remote Control Box Condensate Prevention3
Make Electrical Connections3
Variable Frequency Drives38
Water Valve Assemblies38
- Valve Wiring39
Duct Static Pressure Probe (VAV Units)39
Space Temperature Sensor40
Outdoor-Air Temperature Sensor42
Mixed-Air Temperature Sensor42
Enthalpy Switch43
- Control Ranges43
Supply-Air Temperature Sensor44
Return-Air Temperature Sensor44
Heat Interlock Relay45
Fan Relay45
Duct High Humidity Switch45
Wall-Mounted Relative Humidity Sensor46
Duct-Mounted Relative Humidity Sensor47
- Location for Outside Air Relative Humidity47
- Location for Return Air Relative Humidity47
Mixing Box Linkage47
Airﬂow Switch48
Low-Temperature Thermostat48
Outdoor-Air Thermostat48
Filter Status Switch49
High-Pressure Switch49
Air Quality Sensors49
Constant Outside Air (OAC) Control50
- Probe Installation50
- Oac Calibration51
- Using Oavp Values to Determine Duct51
- Field-Supplied or High-Velocity51
Field Wiring Connections52
- Remote Local Interface Device (Hsio)52
  - Return-Air Temperature Sensor52
  - Enthalpy Switch, and Mixed-Air52
- Space Temperature Sensor (SPT52
- Damper Actuators52
- Temperature Control59
- Air Quality Sensor62
- Outside Air Velocity Pressure (Oavp)62
- Fan Volume Control62
Control System64
Processor (PSIO Master) and Option (PSIO Slave)65
- Modules65
Relay (DSIO) Module65
Local Interface Device (HSIO)67
Control Operation69
Accessing Functions and Subfunctions69
Display Functions69
- Summary Display78
- Status Function78
- History Function80
Programming Functions81
- Service Function81
- Set Point Function88
Control Operating Sequence92
Constant Volume and Variable Air Volume Units92
Constant Volume Units Only96
Variable Air Volume Units Only99
Start-Up103
Initial Check103
Quick Test103
Electronic Valve Actuator Field Test108
Control Loop Checkout108
To Check Operation of Analog Outputs108
- Valve Assemblies109
- Valve Assemblies110
Valve Troubleshooting109
General109
Control Module Troubleshooting111
General111
Module Replacement (PSIO, DSIO)112
Unit Troubleshooting113
Metric Conversion Chart116

Carrier 39L Series - Page 8

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