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General| Model | TTA240F Series |
|---|---|
| Type | Air Conditioner |
| Cooling Capacity (Tons) | 2 Tons |
| Refrigerant | R-410A |
| Voltage | 208/230V |
| Phase | 1 |
| Cooling Capacity | 24000 BTU/h |
| HSPF Rating | Not Applicable |
Records changes and product release information for the manual.
Explains the meaning of warning and caution symbols used throughout the manual.
Explains the alphanumeric identification code for unit models.
Provides unit dimensions, clearances, and corner/total weights.
Details electrical characteristics, voltage, circuit, fuse, and motor data.
Verifies completion of all necessary installation procedures.
Inspects unit for shipping damage and verifies correct model.
Checks if refrigerant circuits remain pressurized after shipping.
Guidance on safe unit lifting using appropriate equipment.
Specifies space requirements around the unit for service access.
Instructions for rooftop and ground-level unit mounting.
Structural preparation for refrigerant lines and piping guidelines.
Procedures for removing nitrogen and connecting outdoor lines.
Procedures for connecting refrigerant lines to indoor unit stubs.
Pressurizing the system with nitrogen and checking for leaks.
Steps to evacuate the refrigerant circuit to a specified micron vacuum.
Charging the system with R410A by weight or line length.
Insulating lines to prevent noise and temperature issues.
Charging refrigerant during unit operation and stabilizing conditions.
General information on providing power supply and system wiring.
Installer responsibilities for power supply, disconnects, and grounding.
Field wiring details for electromechanical control systems.
Field wiring diagram for the ReliaTel control system.
Field wiring diagram for night setback panel connections.
Field wiring diagram for zone sensor connections.
Field wiring diagram for thermostat connections.
Describes unit safety controls like EDC, LPCO, HPCO, and IOL.
Final checklist for installation completion before system startup.
Verifies unit power wiring, indoor thermostat, and low voltage wiring.
Steps for starting the unit after installation and pre-start checks.
Sequence of operation for electromechanical controls in cooling mode.
How the evaporator fan operates based on thermostat settings.
System operation sequence in cooling mode with electromechanical controls.
Introduces the ReliaTel microelectronic control and its operation.
Explains the cooling operation sequence for ReliaTel units.
Describes evaporator fan operation with ReliaTel controls.
Explains the heating operation sequence for ReliaTel units.
Outlines three methods (Step, Resistance, Auto) for testing unit components.
Table detailing test steps, modes, resistance values, and component operation.
Procedures to check system status using LEDs or voltage readings.
Identifies system failures based on voltage and LED status.
Diagnosing failures using voltage measurements.
Procedures for resetting lockouts via zone sensor or unit disconnect.
Function of the ZTS Service LED and airside fan issues.
Testing zone temperature thermistors and setpoint sensors.
Methods for testing unit LEDs using a multimeter.
Verifies serial communication voltage and zone sensor functionality.
Describes behavior on RTCI communication loss.
Routine monthly inspections and cleaning procedures.
Annual maintenance tasks for the cooling season.
Safety precautions and first aid for handling fiberglass and maintenance.
Log for recording ambient temp, pressures, and superheat/subcooling.
Details parts-only warranty, exclusions, and limitations.
Warranty terms for commercial equipment and accessories.
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