Carrier WeatherExpert 48LC Series - PROTECTIVE DEVICES; Compressor Protective Devices; GAS HEATING SYSTEM

Carrier WeatherExpert 48LC Series

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21

Fig. 18 — 48LC**17-20 Roof Curb Details

Table of Contents

Safety Considerations1
- Table of Contents1
General2
Rated Indoor Airflow (Cfm)2
Installation19
Step 1 - Plan for Unit Location19
- Roof Mount19
Step 2 - Plan for Sequence of Unit Installation19
- Curb-Mounted Installation19
- Pad-Mounted Installation19
- Frame-Mounted Installation19
Step 3 - Inspect Unit19
Step 4 - Provide Unit Support19
- Roof Curb Mount19
- Slab Mount (Horizontal Units Only)23
- Alternate Unit Support (in Lieu of Curb or Slab Mount)23
Step 5 - Field Fabricate Ductwork23
Step 6 - Rig and Place Unit23
- Positioning on Curb24
Step 7 - Horizontal Duct Connection24
Step 8 - Install Outside Air Hood - Factory24
Step 9 - Install Flue Hood and Combustion Air26
- Hood26
Step 10 - Install Gas Piping26
- Gas Supply Line27
- Factory-Option Thru-Base Connections27
Step 11 - Install External Condensate Trap and Line28
Step 12 - Make Electrical Connections29
- Field Power Supply29
- Units Without Factory-Installed Non-Fused Disconnect or Hacr35
- Units with Factory-Installed Non-Fused Disconnect or Hacr35
- All Units36
- Convenience Outlets36
- Hacr37
- Factory-Option Thru-Base Connections38
- Units Without Thru-Base Connections38
- Field Control Wiring38
- Thermostat38
- Unit Without Thru-Base Connection Kit38
- Heat Anticipator Settings39
- Transformer Connection for 208-V Power Supply39
RTU Open Controller (Factory-Installed Option)39
Systemvu™ Controller (Factory-Installed Option)39
Humidi-Mizer System Control Connections39
- Humidi-Mizer System - Space Rh Controller39
Integrated Staging Control (ISC) Board40
- Isc Board - Sequence of Operation41
Economi$Er X (Factory Option)43
- System Components43
- Specifications43
- Inputs43
- Outputs43
- Environmental43
- Economizer Module Wiring Details44
- Interface Overview45
- Setup and Configuration46
- Enthalpy Settings55
- Two-Speed Fan Operation55
- Checkout56
- Troubleshooting56
Staged Air Volume (SAV™) with Variable Frequency57
- Drive57
- Multi-Speed Vfd Display Kit (Field-Installed Option)58
- Connecting the Keypad to the Vfd59
- Program the Vfd for Indoor Fan Control60
Smoke Detectors71
- Return Air Sensor Tube Installation71
- Smoke Detector Test Magnet71
- Additional Application Data71
Step 13 - Install Accessories71
Step 14 - Check Belt Tension72
- Belt Force - Deflection Method72
- Belt Tension Method72

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