LG GEN2 Series - User Manual

To Next Page

ROOFTOP DEDICATED

OUTDOOR AIR SYSTEMS (DOAS)

INSTALLATION AND OPERATION MANUAL

GEN2 Series (AR-DR)

Base Rooftop DOAS

500 to 18,000 CFM

GEN2 Series (AR-DE)

Energy Recovery Wheel Rooftop DOAS

1,000 to 18,000 CFM

Main Page

General Safety Information2
Table of Contents3
Unit Nomenclature8
General Data9
Product Overview19
- Heating19
- Airflow Arrangement19
- Safety Listing19
- Models and Capacities19
Subassemblies20
Installation22
Typical Unit Weights and Dimensions22
Additional Clearances for Packaged25
Handling Concerns for Units with Package25
Lifting26
Roof Curb Mounting26
Optional Piping Vestibule27
Ductwork Configurations27
Rail Mounting and Layout27
- Gas Connections28
Piping Installation30
- Optional Coil Piping30
- Condensate Drain Trap30
- Condensate Overflow Switch30
Electrical Information31
- Determine the Size of Main Power Lines31
- Determine the Size of Electric Heater Wiring31
- Provide the Opening(S) for the Electric Connections31
- Connect the Power Supplies31
- Wire the Optional Convenience Outlet31
- Connect Field-Wired Low Voltage Components31
- Field-Provided Disconnect31
- Phase Monitor33
- Variable Frequency Drive33
- Supply Fan VFD Sequence33
Optional Component Operation33
- Exhaust Fan VFD Sequence33
- Exhaust Fan Only Power33
- Hot Gas Reheat Valve37
Factory-Installed Refrigeration System Components37
Start-Up Unit40
- Pre-Start-Up Checklist41
- Special Tools Required41
- Start-Up Procedure41
- Voltage Imbalance41
- Start-Up Checklist42
Start-Up Components45
- Fan45
- Supply Fan (Plenum Type)45
- Fan Wheel Rotation Direction45
- Supply/Exhaust Fan45
- Vibration45
- Discharge Air Temperature Sensor46
- Optional Dirty Filter Switch48
Optional Energy Wheel52
Troubleshooting52
- Microprocessor Controller52
- Phase Monitor52
- Variable Frequency Drive52
- Optional Digital Scroll Compressor Controller52
Routine Maintenance59
Maintenance Procedure59
General Safety Information63
Unit Identification64
Furnace Model Number64
Burner Control Turndown64
Furnace Serial Number64
ETL Listing64
Product Overview64
Furnace Control Center65
- Furnace Control Center Components65
- Typical Furnace Control Logic65
Typical Furnace, Electrical and Control Components66
Gas-Fired Burner Turndown67
- Electronic Modulation67
- Available Turndown Control Options67
Installation of Venting for Outdoor Units68
Installation of Venting for Indoor Units68
Venting Methods69
Installation of Standard Indoor Venting69
- Horizontal69
Installation of Concentric Venting70
- Horizontal72
- Vertical73
Installation of Control Wiring73
Installation of Discharge Air Sensor73
Installation of Gas Piping74
- Test the System for Leaks74
- Gas Pressure Test Ports74
Sequence of Operation76
- Start-Up / Standby76
- Heat Mode76
- Recovery from Lockout76
Performance Data76
Start-Up - Furnaces (All Units)77
- Modulating Valve High Fire Setting78
- Modulating Valve Low Fire Setting78
- Ignition Controller80
Reference: Controls90
- Furnace Control with Microprocessor90
Maintenance91
- Combustion Blower Motor91
- Burners and Orifices91
- Heat Exchanger91
- Flue Collector Box91
- Electrical Wiring91
- Gas Train91
- Replacement Parts91
Maintenance Log92
Controller Overview95
- Expansion Boards97
- Connecting to the Web97
- Service Password97
- Startup Settings97
- Expansion Board Addresses and Dip Switch Settings98
- IP Address99
Software Backup and Restore100
AC Smart Setup101
Navigation106
Menu106

Need help?

Do you have a question about the LG GEN2 Series and is the answer not in the manual?

LG GEN2 Series Specifications

General

Brand	LG
Model	GEN2 Series
Category	Fan
Language	English

Related product manuals

LG LZ-H0806BA1

23 pages

LG GEN2 Series - User Manual

Table of Contents

LG GEN2 Series Specifications

Related product manuals