John C Molnar

US Patent:

42720125, Jun 9, 1981

Filed:

Mar 9, 1979

Appl. No.:

6/018923

Inventors:

John R. Molnar - Springdale PA
Earl H. Mechling - Springdale PA
William L. Bell - Springdale PA

International Classification:

H02J 100
G05D 2312

US Classification:

236 1E

Abstract:

A plurality of temperature conditioning units are divided into groups with the groups being sequentially and repetitively, one after the other, enabled for a first preset number of timing intervals and then disabled for a second preset number of timing intervals. The sum of the first and second preset number of timing intervals is equal to the total number of groups so that at any given time, but on a rotating basis, the first preset number of groups of units is enabled and the second preset number is disabled. A setback feature which can be overriden by a thermostatic control is provided for off hours. An alarm system provides warning of abnormal operation of any one of the units as detected by excessive cycling.