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General| Brand | Lennox |
|---|---|
| Model | LGH094U |
| Category | Air Conditioner |
| Language | English |
Details LGH092H through 152U unit series features, heating inputs, cooling capacities, and compressor configurations.
Warns about improper installation, adjustment, alteration, service, or maintenance causing injury or death.
Advises caution when handling equipment due to sharp sheet metal edges.
Lists available options and accessories for the cooling system.
Lists available options and accessories for the heating system.
Details available supply air blower options and related accessories.
Lists cabinet-related accessories like combination coil/hail guards.
Lists various control options and accessories for the unit.
Details options related to indoor air quality, including filters and sensors.
Lists electrical options like voltage and circuit breakers.
Details standard and high-performance economizer options and controls.
Lists options for outdoor air dampers.
Describes the standard static power exhaust option.
Details the Humiditrol option for condenser reheat.
Lists cooling system options for specific models.
Lists heating system options for specific models.
Details supply air blower options for specific models.
Lists cabinet accessories for specific models.
Details control options for specific models.
Lists indoor air quality options for specific models.
Describes economizer options for specific models.
Lists outdoor air damper options for specific models.
Details the power exhaust option for specific models.
Provides general data for 7.5 and 8.5 ton models.
Details cooling performance metrics like capacity, airflow, and efficiency.
Lists refrigerant type and charge amounts for different coil options.
Indicates availability of gas heating options.
Provides general data for 10 and 12.5 ton models.
Details cooling performance metrics like capacity, airflow, and efficiency.
Lists refrigerant type and charge amounts for different coil options.
Details gas heating performance, including input, output, and efficiency.
Provides information on derating units for high altitude installations.
Provides general data for direct drive models.
Details cooling performance metrics for direct drive models.
Lists refrigerant type and charge for direct drive models.
Provides general data for belt drive models.
Details cooling performance for belt drive models.
Lists refrigerant type and charge for belt drive models.
Details gas heating performance for specific models.
Blower data for base units, excluding heat section.
Specifies the maximum static pressure with gas heat.
Blower data for base units, excluding heat section.
Specifies the maximum static pressure with gas heat.
Details specifications for factory-installed belt drive kits.
Provides performance data for the power exhaust fan.
Lists air resistance values for factory/field installed options.
Provides air resistance data for ceiling diffusers.
Details air throw data for ceiling diffusers.
Specifies the maximum static pressure with gas heat.
Electrical data for 7.5 ton high efficiency units.
Electrical data for 8.5 ton high efficiency units.
Electrical data for 10 ton high efficiency units.
Electrical data for 12.5 ton high efficiency units.
Electrical data for 7.5 ton direct drive models.
Electrical data for 12.5 ton direct drive models.
Electrical data for 7.5 ton belt drive models.
Electrical data for 10 ton belt drive models.
Shows the physical arrangement of parts for the all-aluminum coil system.
Shows the physical arrangement of parts for the fin/tube coil system.
Details the arrangement of components within the control box for non-CE units.
Shows layout of control box for ultra high efficiency non-CE units.
Illustrates control box components for CE certified units.
Overview of control box components and ESD precautions.
Describes the optional disconnect switch used to power down the unit.
Explains the function and specifications of the control transformer.
Details the function of outdoor fan relays.
Describes the function of burner controls.
Explains the function of the power exhaust relay.
Details the blower motor overload relay and its operation.
Describes the functions and capabilities of the Unit Controller.
Explains compressor overload relays for CE units.
Describes the variable frequency drive and its operation.
Details the VFD power to motor contactor.
Explains the inverter start forward rotation relay.
Illustrates plumbing and refrigerant circuits for high efficiency units with all-aluminum coils.
Shows plumbing and refrigerant circuits for standard efficiency fin/tube coil units.
Illustrates plumbing and refrigerant circuits for ultra high efficiency units with fin/tube coils.
Describes the compressors and their circuits.
Details the function and installation of crankcase heaters.
Explains the operation of high-pressure switches.
Describes the function of low ambient switches.
Mentions optional service valves for condenser units.
Explains the purpose of the filter drier in refrigerant circuits.
Details the operation of low-pressure switches.
Describes the function of freezestats to prevent coil icing.
Explains the use of temperature sensors for system optimization.
Details the function of the pressure transducer for system optimization.
Illustrates the standard blower assembly.
Shows a tensioner blower assembly without the belt.
Illustrates the direct drive blower assembly.
Describes the location and access to the blower compartment.
Provides instructions for servicing belt drive blowers.
Gives servicing instructions for direct drive blowers.
Explains how to determine unit air volume and adjust CFM.
Details importance of correct voltage phasing for compressor rotation.
Shows locations for static pressure readings for ductwork and diffusers.
Illustrates correct pulley alignment for belt drives.
Describes how to measure belt tension using force and deflection.
Information on field-furnished blower drives and table of drive components.
Explains the function and operation of the burner ignition control.
Diagram showing the nominal timings for a normal ignition sequence.
Diagram illustrating ignition attempt sequence with retrials.
Describes the heat exchanger assembly and its operation.
Details inserts for direct drive heat exchangers.
Explains the burner assembly and its control.
Shows insert locations for direct drive units.
Details the function of the primary high temperature limit switch.
Explains the function and installation of burner orifices.
Describes the flame roll-out limit switch and its function.
Explains the combustion air prove switch operation.
Details the combustion air inducer and its motor.
Specifies the capacitor for the combustion air inducer motor.
Illustrates the White-Rodgers gas valve and its adjustments.
Shows the Honeywell gas valve and its adjustments.
Describes the spark electrode assembly and its function for ignition.
Procedure for refrigerant charge and check for all-aluminum coil units.
Example of calculating target liquid temperature for charging.
Charging curves for LGH/LCH092H4 all-aluminum TXV units.
Charging curves for LGH/LCH102H all-aluminum TXV units.
Charging curves for LGH/LCH120H all-aluminum coil units.
Charging curves for LGH/LCH150S all-aluminum coil units.
Procedure for refrigerant charge and check for fin/tube coil TXV units.
Procedure for fin/tube coil hot gas reheat TXV units.
Procedure for fin/tube coil & RFC refrigerant charge and check.
Operating pressures for LGH/LCH150S fin/tube RFC units.
Charging curves for LGH/LCH150S RFC fin/tube units.
Procedure for fin/tube coil & TXV refrigerant charge and check.
Table for approach temperature verification.
Steps for preliminary and seasonal checks before unit operation.
Instructions for starting up the cooling system.
Steps for placing the furnace into operation.
Instructions for safely turning off gas to the appliance.
Steps for safety or emergency shutdown of the unit.
Procedures for performing heating system service checks.
Guidelines for gas piping installation and testing.
Steps for testing gas piping for leaks and pressure.
How to test and verify gas supply pressure.
How to check for proper gas flow to burners.
Details the inshot burner assembly and its servicing.
Explains how to check and set the spark electrode gap.
Procedures for accessing and removing the heat exchanger.
Instructions for inspecting and cleaning the evaporator coil.
Procedures for cleaning condenser coils.
Steps for checking electrical connections, voltage, and motors.
Information on roof mounting frames for unit installation.
Details the LP/propane conversion kit.
Explains the function of the dirty filter switch.
Describes optional supply/return transitions.
Information on motorized and manual outdoor air dampers.
Details optional supply and return diffusers.
Explains the function of the blower proving switch.
Notes economizer can be field or factory installed.
Describes the free cooling modes available.
How to adjust economizer settings via the Unit Controller.
Explains the use of gravity exhaust dampers.
Details the use of LAPEF power exhaust fans.
Details the optional cold weather kit for Canada.
Overview of the A55 Unit Controller and its capabilities.
Explains the CO2 sensor and its effect on economizer operation.
Describes the drain pan overflow switch and its function.
Provides a general description of hot gas reheat operation.
Shows the refrigerant flow during reheat mode.
Shows the refrigerant flow during cooling mode.
Explains the operation of the reheat coil solenoid valve.
How to adjust the reheat setpoint.
Procedure for testing hot gas reheat operation.
Table showing default reheat operation modes.
Steps for operating the belt drive supply air inverter.
Diagram showing inputs for staging the supply air blower.
How to enter design specified CFM into the controller.
How to set the maximum CFM for the blower.
Menu path to enter design specified CFM.
How to set minimum damper positions for ventilation.
How to set blower speed for direct drive systems.
How to set minimum damper positions for ventilation.
Describes two-stage thermostat operation with economizer.
Describes three-stage thermostat operation.
Wiring diagram for constant supply air, belt drive blower units.
Wiring diagram for LGH150H constant supply air, belt drive blower units.
Wiring diagram for LGH150H G, J, M constant supply air, belt drive blower.
Describes the power sequence for unit operation.
Details the blower operation sequence.
Explains the economizer operation sequence.
Sequence for first stage cooling.
Wiring diagram for staged supply air, no bypass, belt drive blower units.
Describes the power sequence for M3 units.
Details blower operation for M3 units.
Explains economizer operation for M3 units.
Sequence for first stage cooling on M3 units.
Describes the first stage heating sequence.
Details the second stage heating sequence.
Indicates when second stage heat ends.
Indicates when first stage heat ends.
Explains the low ambient kit sequence.
Diagram showing thermostat connection points.
Describes the power sequence for the economizer.
Explains how the economizer operates with the unit controller.
Wiring diagram for staged supply air, no bypass, belt drive blower units.
Wiring diagram for LGH150H staged supply air, no bypass, belt drive blower.
Wiring diagram for LGH150H G, J, M staged supply air, no bypass, belt drive blower.
Wiring diagram for staged supply air, with bypass, belt drive blower units.
Wiring diagram for LGH150H staged supply air, with bypass, belt drive blower.
Wiring diagram for LGH150H G, J, M staged supply air, with bypass, belt drive blower.
Wiring diagram for LGH092-152U staged supply air, with bypass, belt drive blower.
Sequence of operation for supply air inverter without bypass.
Sequence of operation with factory-installed bypass.
Fault sequence for the A96 inverter.
Troubleshooting sequence for direct drive blower without S52.
Describes the operation of the direct drive blower.
Fault sequence for direct drive blower without S52.
Fault sequence for direct drive blower with S52 configured.
Steps for troubleshooting blower failures and alarms.
