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General| Brand | Bryant |
|---|---|
| Model | Legacy 574D----A |
| Category | Air Conditioner |
| Language | English |
Procedures for verifying unit model, serial number, and inspecting shipment.
Locating the unit's model and serial number information.
Checking for shipping damage before removing packaging.
Instructions for securing the unit to a curb or mounting pad.
Guidance on installing the roof curb and ensuring a watertight seal.
Instructions for placing the unit on a concrete pad.
Guidelines for creating and installing ductwork connections.
Specifies minimum clearances required for unit operation and servicing.
Safe procedures for rigging and lifting the unit into position.
How to connect the condensate drain line and install a trap.
Instructions for installing the flue hood assembly for proper venting.
Guidelines for connecting the gas supply line to the unit.
Connecting ductwork to the unit's supply and return openings.
Steps to adapt the unit for vertical downflow duct configuration.
Instructions for making high-voltage and control-voltage wiring connections.
Specific wiring adjustments for 208-volt operation.
Guidelines for connecting thermostat and low-voltage wiring.
Basic wiring procedures for control voltage connections.
How to properly adjust the heat anticipator on thermostats.
Information on transformer protection and fuse replacement.
Procedure to locate and repair refrigerant leaks.
Steps for initial heating start-up and adjustments.
Verifying proper operation of the heating control system.
Procedures for checking and adjusting the unit's gas input.
Detailed steps for adjusting gas input based on pressure or flow.
Method for measuring gas flow at the meter.
Checking gas input via manifold pressure for propane.
Visual inspection of burner flames for proper operation.
Verifying proper operation of the cooling control system.
Method for checking and adjusting the refrigerant charge.
How to change the fan speed for gas heating operation.
Setting cooling fan speed when dehumidification is not used.
Setting fan speeds for cooling with dehumidification feature.
How the fan operates in continuous mode.
Importance and replacement of air filters.
Cleaning instructions for the indoor blower and motor.
Detailed steps for cleaning the indoor blower motor and wheel.
Cleaning and inspection of the induced draft blower assembly.
Inspecting and cleaning the flue collector box and heat exchanger.
Location and function of the limit switch.
Information on the unit's direct spark ignition system.
Inspecting main burners for issues and adjusting if necessary.
Procedure for removing the gas train for servicing.
Inspecting and cleaning coils and the condensate drain pan.
Description of the TXV metering device used in the system.
Function of pressure switches in the refrigeration circuit.
Role of the loss of charge switch in system protection.
General overview of the economizer system and its features.
Available field-installed accessories for the economizer.
Installation procedure for the vertical economizer on small chassis.
Part numbers for indoor coil air filters.
Part numbers for indoor coil air filters.
Description of economizer sensors and their functions.
Function of the low ambient lockout switch.
Setting up economizer for outdoor dry bulb changeover control.
Setting up economizer for enthalpy changeover control.
Setting up economizer for differential enthalpy control.
Connecting and configuring the IAQ sensor for ventilation.
Adjusting the exhaust fan set point based on damper position.
Setting the minimum damper position for ventilation.
Configuring the CO2 sensor for equipment and ventilation.
Impact of dehumidification on fresh air and DCV control.
Step-by-step operation of the economizer control.
Procedure to prepare the economizer for troubleshooting tests.
Checking differential enthalpy control operation.
Checking single enthalpy control operation.
Checking DCV and power exhaust functions.
Verifying minimum and maximum damper positions for DCV.
Checking the supply-air input for the economizer.
Procedure to return the economizer to normal operation.
