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General description of LHT156, 180, and 240 units, highlighting CTO configuration.
Crucial safety precautions to prevent injury or death during installation and service.
Details options for condensate drains and overflow switches for cooling systems.
Lists available blower options, motor types, and drive kits for supply air.
Options for unit cabinet enhancements like hail guards and corrosion protection.
Details available control accessories like switches, detectors, and modules.
Options related to air quality, including filters, CO2 sensors, NPBI, and UVC lights.
Details electrical options like voltage, disconnect switches, circuit breakers, and GFI.
Lists available electric heat capacities (kW) for different unit models.
Details economizer controls and barometric relief dampers for air management.
Various roof curb options for unit mounting and installation.
Options for supply and return air distribution through diffusers and transitions.
Provides basic data like tonnage, model numbers, efficiency, and blower type.
Details cooling capacity, airflow rates, and power consumption metrics.
Specifies refrigerant type and charge amounts for unit circuits.
Details heating capacity, power consumption, and coefficient of performance (COP).
Details indoor blower motor specifications and drive kit information.
Details electrical characteristics like voltage, phase, and frequency for unit operation.
Provides blower resistance data for the base unit with dry indoor coil and air filters.
Details overcurrent protection and minimum circuit ampacity for electric heat.
Illustrates the physical layout of major components within the unit.
Describes components found in the control box, including transformers and switches.
Details components of the cooling system, including circuits, compressors, and fans.
Information on accessing and components within the blower compartment.
Procedure for measuring and adjusting blower CFM using motor pulley settings.
Instructions for adjusting blower belt tension and pulley alignment for optimal performance.
General information on electric heat sections, elements, and staging.
Describes the function and wiring of contactors for energizing heating elements.
Explains the high-temperature limit thermostats for electric heat sections.
Information on fuses protecting the electric heat sections and their ratings.
General guidance on unit installation according to instructions and codes.
Detailed steps for checking and charging refrigerant, including safety warnings.
Covers preliminary checks, seasonal checks, and start-up procedures for cooling and heating.
Procedures for checking the cooling system's charge and performance.
Instructions for checking, cleaning, or replacing air filters.
Guidance on inspecting and cleaning the evaporator coil.
Instructions for cleaning and inspecting the condenser coil.
Procedures for checking electrical connections, voltage, and amp draw.
Details the installation and types of roof curbs for unit mounting.
Information on manual and motorized outdoor air dampers for ventilation control.
Describes economizer options and their operating modes (TMP, ODE, DIF, GLO).
Overview of the A55 Unit Controller's capabilities and network integration.
Guidance on using design specifications to set up blower CFM.
Instructions for setting blower speeds using the mobile service app.
How to configure the unit for manual or automatic inverter bypass.
Procedure for manually bypassing the Variable Frequency Drive (VFD).
Details thermostat wiring, key list, and connection points to the control board.
Wiring diagram for the economizer system, including sensors and damper control.
Wiring diagram detailing the connections for electric heat elements and controls.
Step-by-step explanation of unit operation during heat pump heating mode.
Step-by-step explanation of unit operation for electric heat stages.
General
