An older Carrier Infinity Control cannot turn off a new Carrier Steam Humidifier. Is a relay needed to enable the Infinity Control thermostat (vintage Sept. 2008, model SYSTXCCUID01-B) to stop producing steam? If so, how to wire it and should NO or NC terminals be utilized? The humidifier works well. The two HUM terminals in the Carrier heat pump furnace are connected to the two Humidistat terminals in the humidifier. All humidifier functions work as advertised.
source https://hvac-talk.com/vbb/showthread.php?2226742-Carrier-Steam-Humidifier&goto=newpost
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