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General| Model Number | YHC067E |
|---|---|
| Category | Air Conditioner |
| Cooling Capacity | 67, 000 BTU/h |
| Refrigerant Type | R-410A |
| Voltage | 208/230V |
| Phase | 3 |
Defines safety advisories (Warning, Caution, Notice) used throughout the manual.
Emphasizes qualified personnel for field wiring and grounding to prevent hazards.
Stresses the necessity of wearing appropriate PPE for safety.
Explains the meaning of the first digit in the model number for unit type.
Details the significance of the second digit for unit efficiency ratings.
Describes options for fresh air intake based on model number digits.
Outlines procedures for inspecting the unit upon arrival for damage and compliance.
Provides precautions for storing the unit to prevent damage and condensate formation.
Gives an overview of the unit's construction, testing, and control system options.
Illustrates minimum clearances required for installation and service.
Warns about hazards associated with lifting heavy units and equipment.
Details risks of improper lifting and testing procedures for safe operation.
Details requirements for unit installation foundations, including safety and structural integrity.
Shows supply and return air opening locations for various unit configurations.
Provides safety warnings and instructions for lifting and rigging the unit.
Explains the location and function of the TCO1 limit switch for specific gas furnace options.
Describes how to replace the TCO1 limit control for units with different tripping values.
Warns about hazards of disconnecting power and discharging capacitors before servicing.
Stresses the importance of qualified personnel for wiring and grounding.
Illustrates the components specific to the Ultra Low NOx Gas Furnace option.
Provides step-by-step instructions for reconfiguring the condensate drain to the front.
Details the procedure for changing the condensate drain to exit through the unit's base.
Explains how to complete power wiring connections inside the unit's control panel.
Details wiring connections for the through-the-base electrical option.
Describes the 24-volt control power transformer and its circuit breaker.
Outlines wiring considerations for controls using 24 Vac.
Explains wiring guidelines for DC analog input/output signals.
Illustrates wiring two series circuits with two sensors in parallel for space averaging.
Shows wiring three sensors squared in a series/parallel circuit for space averaging.
Describes the circuit required for space temperature averaging using specific sensors.
Explains the importance of voltage balance and how to calculate and correct imbalance.
Guides on verifying and correcting electrical phasing for three-phase motors.
Details the function and importance of compressor crankcase heaters.
Covers self-diagnostic checks and test procedures for the ReliaTel™ system.
Describes a method to test unit components sequentially by shorting terminals.
Explains testing components using a decade box for variable resistance.
Details an automatic test mode that cycles components every 30 seconds.
Explains the operational sequences for Electromechanical and ReliaTel™™ controls.
Discusses ReliaTel™ controls, including anti-short cycle timing and diagnostics.
Describes the cooling operation sequence for ReliaTel™™ systems without an economizer.
Details how the ReliaTel™™ system controls the evaporator fan for gas units.
Explains the control and adjustment of multi-speed indoor fan motors.
Covers operational sequences for multi-zone Variable Air Volume systems.
Explains how the supply fan speed is controlled for VAV applications.
Details the adjustment of the discharge air cool setpoint for VAV units.
Describes the cooling sequence when using the economizer with ReliaTel™ controls.
Explains the cooling sequence for electromechanical systems without an economizer.
Details evaporator fan operation for gas units with electromechanical controls.
Discusses fan performance verification for units with 5-tap direct drive indoor fans.
Describes how to control supply air temperature in occupied modes.
Explains supply air temperature control when using the economizer.
Explains how to adjust belt tension and replace belts on belt-drive units.
Guides on inspecting, cleaning, or replacing air filters.
Details maintenance procedures for the return air smoke detector.
Instructs on checking the condensate overflow switch for free movement.
Provides instructions for removing the hail guard to access coils.
Discusses cleaning procedures and warnings for microchannel coils.
Explains the recommended method for cleaning round tube plate fin coils.
Covers unit diagnostics and system status information for ReliaTel™ controls.
Guides on checking system status using LED indicators and voltage readings.
Details troubleshooting for the economizer actuator's status and function.
Explains resetting cooling failures and ignition lockouts from the space.
Explains resetting cooling failures and ignition lockouts at the unit.
Outlines the warranty coverage for Combination Gas Electric Air Conditioners.
Specifies warranty details for specific model series under commercial use.
