초록 ▼

A furnace having the capability of operating its blower continuously is provided with means for automatically shutting off the blower at the beginning of a heating cycle and for resuming the operation thereof only after a predetermined time has elapsed to allow the heat exchanger to heat up to a tem

A furnace having the capability of operating its blower continuously is provided with means for automatically shutting off the blower at the beginning of a heating cycle and for resuming the operation thereof only after a predetermined time has elapsed to allow the heat exchanger to heat up to a temperature that exceeds the dew point of the flue gas, to thereby reduce the occurrence of cold spot corrosion in the heat exchanger. Provision is also made, in a two speed blower system, for operating at a lower speed during continuous mode and heating cycle operation, and for operating at the higher speed during the cooling cycles.

대표청구항 ▼

In a heating system of the type having provision for selectively operating the blower motor on a continuous basis, a control system comprising: sensing means for determining when the blower is operating in the continuous mode; and heating control means responsive to said sensing means for turning of

In a heating system of the type having provision for selectively operating the blower motor on a continuous basis, a control system comprising: sensing means for determining when the blower is operating in the continuous mode; and heating control means responsive to said sensing means for turning off said blower when a heating cycle is initiated and for resuming operation of the blower only after a predetermined period following said initiation of a heating cycle.