Twinning control

Details Twinning control Twinning control

1993-04-02

1994-05-31

Wayner, William E.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

62175, 236 1EA, 236 11, F25B 700

Patent

active

053160738

ABSTRACT:
A twinning controller or control circuit for use in an HVAC system is coupled between a system thermostat and at least two HVAC units coupled to a common duct. The HVAC units are heating, cooling or heating and cooling appliances such as heating furnaces, air conditioners, fans, other forced air systems, or other devices for heating and/or cooling an environment. The twinning controller is capable of operating in a single-stage mode (single mode) or a double-stage mode (dual mode). When operating in the double-stage mode, the twinning controller alternately operates the first HVAC unit and the second HVAC unit in order to extend the operating life of the HVAC units. The twinning controller includes a microcomputer which receives inputs from the system thermostat and provides outputs to the first and second HVAC units in order to efficiently control the temperature in an environment such as a living space. The twinning control includes LED indicators which provide fault codes and blower sense inputs for receiving signals indicative of the status of blowers in the HVAC units.

REFERENCES:
patent: 3059448 (1962-10-01), McGrath
patent: 4075864 (1978-02-01), Schrader
patent: 4081691 (1978-03-01), Evalds et al.
patent: 4916913 (1990-04-01), Narikiyo
patent: 5062409 (1991-11-01), Kamanaka et al.

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