公开(公告)号：US20210063025A1

公开(公告)日：2021-03-04

申请号：US16556545

申请日：2019-08-30

申请人： Lennox Industries Inc.

发明人： Robert B. USELTON ,  Matthew S. RIEPENHOFF

IPC分类号： F24D19/10 ,  F24D5/10 ,  F24D19/00 ,  F24H3/02

摘要： A method of protecting a single-stage furnace in a multi-zone system includes monitoring a temperature of each zone of a plurality of zones, determining if the temperature of at least one zone of the plurality of zones is less than a threshold temperature, powering on the HVAC system to satisfy a heating demand of the zone having a temperature less than the threshold temperature, monitoring an outlet temperature of the single-stage furnace, determining if the outlet temperature is greater than an outlet temperature threshold, and responsive to a determination that the outlet temperature is greater than the outlet temperature threshold, modulating a gas valve to reduce a flow of gas to the single-stage furnace.