Carrier WeatherExpert 50LC14 - Page 34

Carrier WeatherExpert 50LC14

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34

Fig. 46 — Typical Power Wiring Diagram Electro-Mechanical and RTU Open Controls,

50LC 15-24 Units 460V, 575V Shown

Table of Contents

Safety Considerations1
- Table of Contents1
Model Number Nomenclature and2
- Dimensions2
Rated Indoor Airflow2
Installation19
Jobsite Survey19
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
- Slab Mount (Horizontal Units Only)20
- Alternate Unit Support20
- Slab Mount)20
Step 5 - Field Fabricate Ductwork24
- Units with Accessory or Optional Electric24
- Heaters24
Step 6 - Rig and Place Unit24
- Positioning on Curb25
Step 7 - Horizontal Duct Connection25
Step 8 - Install Outside Air Hood (Factory Option)25
Step 9 - Assemble Barometric Hood26
- Barometric Hood (Vertical Configuration)26
- Barometric Hood27
Step 10 - Economizer - Horizontal Airflow Units28
Step 11 - Install External Condensate Trap/Line28
Step 12 - Make Electrical Connections28
- Field Power Supply29
- Units Without Factory-Installed Non-Fused Disconnect or Hacr37
- Units with Factory-Installed Non-Fused Disconnect or Hacr37
- All Units37
- Convenience Outlets38
- Hacr Amp Rating40
- Factory-Option Thru-Base Electrical40
- Connections40
- Units Without Thru-Base Electrical40
- Connections41
- Field Control Wiring41
- Thermostat41
- Units Without Thru-Base Connection Kit41
- Configuring for Electric Heat41
- Heat Anticipator Settings41
- Transformer Connection for 208-V Power Supply41
RTU Open Controller (Factory-Installed Option)43
Systemvu Controller (Factory-Installed Option)43
Integrated Staging Control (ISC)44
- Sequence of Operation44
Economi$Er® X (Factory-Installed Option)46
- Unit Installation46
- Enthalpy Sensor Relocation46
- W7220 Economizer Controller46
- W7220 Economizer Module Wiring51
- Economizer Control Configurations54
- Economiser Hardware57
- Operating Sequences58
- W7220 Economizer Setup and Configuration60
- Troubleshooting61
- Control Setpoint and Configuration Log63
Staged Air Volume (SAV™) with Variable Frequency66
- Drive66
- Multi-Speed Vfd Display Kit (Field-Installed Accessory)66
Smoke Detectors78
- Return Air Sensor Tube Installation78
- Smoke Detector Test Magnet78
- Additional Application Data78
Step 13 - Install Accessories78
Step 14 - Check Belt Tension78
- Belt Force: Deflection Method78
Pre-Start and Start-Up79
Start-Up Checklist83

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