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General| Model | YHJ072A |
|---|---|
| Category | Air Conditioner |
| Cooling Capacity | 72, 000 BTU/h |
| Refrigerant | R-410A |
| Compressor Type | Scroll |
| Voltage | 208/230V |
| Phase | 3 |
| Sound Level (Outdoor Unit) | 76 dB |
Defines safety advisories, environmental concerns, and refrigerant handling.
Emphasizes qualified personnel and NEC compliance for safety.
Stresses the importance of wearing PPE to prevent injury.
Covers EHS policies, submerged unit hazards, and gas leak safety.
Covers inspection for shipping damage and storage precautions.
Describes unit features, door handles, and nameplate details.
Explains various system inputs, sensors, switches, and controls.
Details different zone sensors, integrated systems, and thermostats.
Covers programmable sensors, frost control, DLTS, smoke detectors, and phase monitors.
Warns about hazards of fiberglass wool and required PPE.
Lists general precautions before installation.
Provides first aid for eye and skin contact with dust.
Warns about disconnecting power before servicing.
Provides diagrams and measurements for unit dimensions and installation clearances.
Lists unit weights, corner weights, and accessory weights.
Details safe lifting procedures, including warnings and test lifts.
Guidelines for unit placement, roof curb, and structural support.
Specifies requirements for air openings and duct connections.
Warns about clearances to combustible materials to prevent fire.
Details safe unit handling, rigging, and fork pocket usage.
Summarizes essential steps for successful unit installation.
Notes on economizer positioning and external vent hood installation.
Explains the use and tripping values of temperature limit switches.
Details the process for converting units to horizontal discharge.
Provides instructions for replacing the TCO1 limit switch.
Instructions for converting the return air smoke detector for horizontal discharge.
Notes on converting the wireless interface for horizontal discharge.
Covers hazardous voltage warnings and field wiring requirements.
Details the process for through-the-base gas piping installation.
Lists requirements for safe and proper gas heat operation.
Information on condensate drain connections and conversion.
Procedures for removing the condensate drain pan, especially with overflow switches.
Notes on filter installation and the importance of using filters.
Covers proper wiring practices and safety for field-installed power.
Details standard wiring, copper conductor usage, and disconnect switches.
Instructions for through-the-base electrical option wiring.
Guidelines for field-installed control wiring and safety.
Information on 24V control power transformers and circuit breakers.
Guidelines for wiring 24 VAC controls, conductor sizing, and conduit separation.
Guidelines for wiring DC analog inputs/outputs and conductor sizing.
Provides conductor sizing guidelines for zone sensor module wiring.
Explains how to wire remote sensors for space temperature averaging.
Warns about dangers of capacitors and necessary safety procedures.
Warns about hazards associated with rotating components during service.
Explains the importance of balanced voltage and how to calculate imbalance.
Details how to check and ensure proper electrical phasing for motors.
Warns about working with live electrical components and safety precautions.
Explains the function and importance of crankcase heaters.
Introduces the Symbio 700 service test mode for component testing.
Outlines the operational sequence of the ignition module.
Lists ignition module error codes and their meanings.
Explains the function of the return air smoke detector.
Warns about live electrical components during compressor start-up.
Details the procedure for testing the hot gas reheat function.
Steps for starting gas heat units, including safety checks.
Final checks and programming before leaving the unit.
General safety instructions to follow during final setup.
General safety precautions for performing maintenance tasks.
List of monthly maintenance tasks, including safety warnings.
Instructions for inspecting, cleaning, or replacing air filters.
Importance of maintaining airflow for smoke detector function.
Procedure for checking the condensate overflow switch movement.
Tasks to perform during the cooling season, including coil and fan checks.
Tasks to perform at the beginning of the heating season.
Instructions for cleaning evaporator and condenser coils.
Warns about hazards of coil cleaning agents and required PPE.
Specific instructions for cleaning microchannel coils without chemicals.
Procedures for removing and reinstalling hail guards.
Guidelines for handling refrigerant oil for Hot Gas Reheat units.
Instructions for annual maintenance tasks like cleaning and repainting.
Section for recording unit model, serial number, and wiring information.
Template for recording monthly refrigerant circuit data.
General safety warnings and information for gas heat units.
Explains how room thermostats control heating and cooling cycles.
Information on air filter types, sizes, and maintenance.
Describes the operation of the unit's heating system and ignition.
Details safety limits and controls that prevent overheating and flame issues.
Step-by-step instructions for starting the heating system.
Specific warning about voltage hazards during start-up procedures.
Procedures for shutting down the heating system for short periods.
Steps to safely turn off the gas supply to the unit.
Procedures for annual heating system inspection and maintenance.
Explains the function of the optional condensate overflow sensor.
Details the warranty terms for Electric Air Conditioner YHJ Precedent Models.
