Honeywell Miller Equipment Interface Module YTHM5421R1010, 12z040, Red Link Tech

Specifications

Honeywell Miller Equipment Interface Module with Red Link Wireless Technology. Enhance your HVAC system without running new wires. We have listed this as a used item and at a big discount even though it doesn't look like it was ever fully installed. But someone did remove a wire nut and wallowed out a mounting hole on the main unit. Neither will affect functionality at all. The wiring diagram looks to have a condensation stain on it but everything is still legible. The board itself looks excellent. No oxidation, evidence of liquid, burns, or broken traces observed after a thorough inspection. What we have here seems to be a new unit that someone didn't fully install before returning. Returns are available for this item if it is dead on arrival. This is the first time I'm trying to add a video to an ebay listing so hopefully ebay gets it approved quickly (it says it may take up to 2 business days and today is 10/17/24). Comes in the original packaging with clean manuals. Honeywell Miller part number : YTHM5421R1010 Grainger part number: 12Z040 Works with ERM5220R. We ship quickly, often the same day payment is received but always within one business day of receiving payment. Seller guarantees the model number and condition described above. Buyer is responsible for ensuring that this product will suit their needs. This includes ensuring that the product is compatible with equipment they already own or plan to purchase. This item depends on other HVAC components being present to do it's job. The information below is from an online retailer of this exact product. Seller provides it for convenience but cannot guarantee the accuracy of anything written below this line. Product Description Equipment interface modules (EIMs) allow components of HVAC systems to communicate wirelessly, so wireless thermostats can be relocated or upgraded without opening walls and running new wires. EIMs are wired to heating or cooling equipment or dampers, and the thermostat then sends wireless signals to the EIM to control the system. Brand HONEYWELL HOME Compatible Brand and Series Prestige; RedLINK; VisionPRO Compatible Manufacturer Model Number THX9421R5021 Function Control 4H/2C stages in a heat pump system or 3H/2C in a conventional system Includes 2 Duct Sensors; Equipment Interface Module Overall Depth 1-5/8 in Overall Height 9-5/16 in Overall Length 4-13/16 in Wireless System Compatibility RedLink Color Gray Standards ASHRAE 62.2 Terminal Designations A; A-L/A; B; C; D; G; R; RC; RH; S1; S2; S3; S4; U1; U2; U3; W-O/B; W2-AUX1; W3-AUX2; Y; Y2 Voltage 18 to 30V AC Wireless No UNSPSC 41112209 Country of Origin Mexico (subject to change)

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