Oversized equipment costs more and requires heavier wiring than does properly sized equipment. Each type of ... In a forced-warm-air or forced-hot- water system, these controls are usually set to start the fan or the pump circulating when the furnace or boiler warms up and to stop it when the heating plant cools down. They are ... Oil-Burner Controls The oil-burner controls allow electricity to pass through the motor and ignition transformer and shut them off in the right order. They alsoanbsp;...
|Author||:||Joseph W. Simons, Jerry Okey Newman, United States. Agricultural Research Service|