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General| Product Type | Air Conditioner |
|---|---|
| Model Number | LGM092U |
| Refrigerant | R-410A |
| Operating Voltage | 208/230V |
| Phase | 1 |
Essential safety guidelines and warnings for unit operation and maintenance.
Details on factory-installed options for cooling, heating, blower, cabinet, and control systems.
Options for indoor air quality enhancement and electrical configurations for the unit.
Information on economizer, outdoor air, power exhaust, and other unit accessory options.
Key performance metrics including tonnage, efficiency, and cooling capacity.
Details on refrigerant type, charge amounts, and compressor specifications.
Technical specifications for indoor/outdoor coils and filter types.
Electrical data including voltage, amps, and power requirements.
Gas heating input, output, efficiency, and high altitude adjustment factors.
Data on blower performance related to static pressure and air volume.
Performance data for power exhaust and air resistance for installed accessories.
Air resistance and air throw data for various ceiling diffuser types.
Detailed electrical specifications for 7.5 and 8.5 ton LGM models.
Detailed electrical specifications for 10 and 12.5 ton LGM models.
Diagram illustrating the location of major components within the unit.
Diagram showing the layout of components within the unit's control box.
Detailed descriptions of components found within the unit's control box.
Descriptions of additional components like transformers, fuses, and antennas.
Information on various temperature, room, and CO2 sensors used in the unit.
Details on pressure, humidity, and economizer differential pressure sensors.
Overview of the unit's cooling system, including evaporator and condenser coils.
Details on the variable speed and fixed scroll compressors and their inverters.
Diagram showing the arrangement of controls behind the hinged panel.
Table and explanation of common alarms related to the compressor inverter.
Descriptions of key components within the inverter system, like filters and transformers.
Information on crankcase heaters and high pressure switches for compressor protection.
Details on filter driers, low pressure switches, and condenser fan motors.
Information on temperature sensors and their related functions.
Diagram showing the location of thermistors on the evaporator coil.
Diagram showing the location of thermistors on the condenser coil.
Specific diagram for RT48 and RT49 thermistor locations on condenser coils.
Explanation of how the blower operates in different modes based on thermostat settings.
Step-by-step instructions for accessing the blower assembly for servicing.
Guidelines for static pressure readings and accessing the direct drive blower assembly.
Steps for initiating the direct drive blower start-up and calibration process.
Table detailing factory and field settings for blower CFM parameters.
Troubleshooting guide for common issues related to the direct drive blower motor.
Table listing manufacturer and OEM part numbers for drive components.
Overview of heating section parts and the burner ignition control system.
Diagrams illustrating normal and retrial ignition sequences and timings.
Information on the heat exchanger assembly and burner configuration.
Details on burner orifices, their installation, and high temperature limit switches.
Information on safety limits, air prove switches, inducer motors, and gas valves.
Descriptions and diagrams for spark electrodes and flame sensors.
Instructions for proper unit installation, including mounting and codes.
Step-by-step guide for charging the refrigerant system.
Tables providing target operating pressures for refrigerant charge verification.
Initial checks and procedures for starting the unit in cooling mode.
Procedures for initiating heating start-up and emergency shutdown protocols.
Procedures for checking gas piping, supply pressure, and manifold pressure.
Checks for proper gas flow, burner operation, spark electrode gap, and flame sensing.
Procedures for cooling system checks and routine filter maintenance.
Guidance on lubrication, blower wheel cleaning, coil maintenance, and electrical checks.
Information on mounting frames, LP/propane conversion kits, and dirty filter switches.
Details on duct transitions, outdoor air dampers, and supply/return diffusers.
Diagrams illustrating motorized and manual outdoor air damper installations.
Explanation of the economizer system and its free cooling modes.
Information on gravity exhaust dampers and power exhaust fan applications.
Details on cold weather kits, control systems, IAQ, and overflow switches.
Information on smoke detectors and the hot gas reheat option.
Diagrams showing the refrigerant flow for hot gas reheat operation.
Explanation of reheat coil operation, setpoints, and check-out procedures.
Steps for setting up the direct drive supply air inverter and blower speeds.
Table detailing minimum and maximum CFM settings for various operating modes.
Wiring diagrams for gas heat operation across different voltage configurations.
Detailed sequence of operation for gas heat stages and related components.
Wiring diagram for electronic/electromechanical thermostats and associated notes.
Wiring diagram and operational overview of the economizer system.
Step-by-step sequence of operation for cooling and economizer modes.
Sequence of operation and troubleshooting guide for the direct drive blower motor.
