Honeywell RedLINK Equipment Interface Module - YTHM5421R1010
(1) THM5421R1021 Equipment Interface Module
(2) 50062329-001 sensors for discharge and return air
Equipment Interface Modeule kit with 2 duct sensors. Controls up to 4 stages of heat and 2 stages of cool in a heat pump system and up to 3 stages of heat and 2 stages of cool in a conventional system. Three sets of universal IAQ contacts to control humidification, dehumidification, and ventilation. Four sensor inputs for wired sensors or dry contact devices. Compatible with all Prestige IAQ thermostats and the all-new VisionPRO 8000 (TH8321R1001).