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Critical safety warnings and precautions for installation and handling.
General introduction to the CBA27UHE high efficiency blower coils.
Covers tonnage, connections, coil, and blower dimensions.
Details voltage, circuit ampacity, and overcurrent protection.
Presents CFM and Watts data for various static pressures and taps.
Lists catalog numbers for replacement circuit breakers.
Illustrates the physical layout of unit components.
Emphasizes matching components for warranty and performance.
Details the control box, terminal strip, and jumpers for cooling stages.
Procedures to prevent damage to electronic components from static discharge.
Explains the function of the control transformer, fuse, blower relay, and dehumidification relay.
Describes the blower motor features, balancing, and important notes.
Refers to data for approved electric heat matchups and electrical ratings.
Details sequencer relays and temperature limits for electric heat sections.
Specific information on temperature limits and their operation in 208/230V sections.
Detailed electrical specifications for electric heat options for the -018 model.
Detailed electrical specifications for electric heat options for the -036 model.
Detailed electrical specifications for electric heat options for the -048 model.
Detailed electrical specifications for electric heat options for the -060 model.
Essential pre-start checks for proper installation and safety.
Steps for initiating cooling operation, including refrigerant charge.
Steps for initiating heating operation and blower staging.
Instructions for emergency shutdown and extended period shutdown.
How blower operation is controlled and adjusted via thermostat settings.
Procedure for measuring and ensuring acceptable external static pressure.
Guide to selecting blower speed taps for different operating conditions.
Guidelines for maintaining air filters to ensure proper airflow and unit performance.
Important notes on cleaning aluminum coils to prevent damage from chemical solutions.
Instructions for checking and maintaining the supply air blower assembly.
Procedures for checking electrical connections, breakers, and voltage.
Details on the ECM blower motor, its removal, and handling.
Explains how ECM maintains torque under varying static pressures.
Recommended wiring practices and connector orientation for ECM installation.
Procedure for verifying high voltage supply to the blower motor.
Steps to diagnose low-voltage communication issues affecting motor operation.
Describes operational sequences for heating and cooling modes.
Provides recommended blower speed tap selections based on operating conditions.
Wiring diagrams for units that do not use circuit breakers for electric heat.
Wiring diagrams for units that utilize circuit breakers for electric heat.
Operational steps for the first stage of electric heat for specific models.
Operational steps for the second stage of electric heat for specific models.
Operational flow for electric heat components in ECB29-8 and 8CB series.
Operational steps for the first stage of electric heat for specific models.
Operational steps for the second stage of electric heat for specific models.
Operational steps for the first stage of electric heat for specific models.
Operational steps for the second stage of electric heat for specific models.
Operational steps for the first stage of electric heat for specific models.
Operational steps for the second stage of electric heat for specific models.
Operational steps for the first stage of electric heat for specific models.
Operational steps for the second stage of electric heat for specific models.
Operational steps for the third stage of electric heat for specific models.
Operational flow for electric heat components in three-phase models.
Operational flow for electric heat components in three-phase models.
Operational steps for the first stage of electric heat in three-phase models.
Operational steps for the second stage of electric heat in three-phase models.
Operational steps for the first stage of electric heat in 460V three-phase models.
Operational steps for the second stage of electric heat in 460V three-phase models.
Explains the function and sequence of the K183 dehumidification relay.
Guide on selecting blower speed taps for system configurations.
Specific blower speed tap configurations for single-stage systems.
Specific blower speed tap configurations for two-stage systems.
Schematic illustration of the K183 relay and its connections.
General
