HVAC unit identification device and method
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United States of America Patent
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Dec 26, 2017
Grant Date -
Aug 24, 2017
app pub date -
Feb 18, 2016
filing date -
Feb 18, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A device for pulsing the control lines of an HVAC system in order for a user to discover which outside unit is associated with a particular inside unit. Lead wires from the device connect to the control contacts on the thermostat of an HVAC unit. The device is an electrical or electromechanical circuit that can use the power contained within the thermostat or can be battery powered. Once the device is connected, it pulses the control line for the reversing valve, in the case of a heat pump system, or pulses the control line for the compressor, for a cooling-only system. This pulsing creates a loud clicking sound in either case that allows the repair technician to decipher the correct outside unit corresponding to the inside unit without use of a helper.
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