Posted 20 hours ago

Honeywell THM5421R1021 IAQ Equipment Interface Module

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Instead of saying it could be powered by either batteries or 24V they should say batteries and/or 24V. This Module will control 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. Discover indoor and outdoor LED lighting options from undercabinet to ceiling and vanity, you can trust Bright33 for convenience, quality and value. The problem was he had attached the wire to the RC terminal which was jumpered to the R terminal but he had not tightened the screw connecting the jumper wire to the R terminal. Honeywell is the backbone of the HVAC industry, helping to improve the lives of consumers by providing innovative, cutting-edge solutions.

International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. There is also another small circular lithium battery in the stat which the manual says keeps the date and time intact. From bathroom and kitchen products to pre-assembled installation kits and behind-the-wall products, you can count on Stream33 for convenience, quality and value. I suspect it is OK and even preferrable to do so and it sounds like jtrammel has already done this without any problems. At Cold Air Central, we pride ourselves on being a trusted authority in the world of HVAC supplies, equipment, and parts.Ideal for any situation, this device is very lightweight, making it simple to install no matter the situation. I suspect most installers and homeowners will be mostly concerned with how to install the equipment properly and less with the engineering details about how the electronics actually work. Then there is the concern that my installer connected only the batteries and not the readily available 24V wiring.

Personally, I find the engineering oriented information interesting but sometimes it can be frustrating and confusing when the primary focus is simply how you need to connect the equipment together. Our old heat-only thermostat had exactly two wires running to it from the boiler room: red and white (connected to the R and W terminals respectively). When you purchase through links on our site, we may earn an affiliate commission, which supports our community.

Operating Temperature Rating -40 to 165 Deg F; Supply Voltage 18 to 30 VAC; Current Rating 1 Amp (Cool), 1 Amp (Heat), 0. I'm not impressed by honeywell either as I have written to them several times and I never get any responce. When the thermostat tells me to "press Connect on the wireless device", I do press the sole button on the EIM, but nothing happens. You can easily relocate a thermostat or upgrade equipment without running new wires when using this module and a wireless FocusPRO® thermostat.

Use the Resideo Pro App to install T6 Pro Smart Thermostat in homes, which will associate those homes to your company. The thing I don't like is that the manual uses the OR word when it describes powering up the stat using the 24V wiring or the 6V (4 X 1. Their wide range of offerings include thermostats, zoning solutions, and air purifiers, helping to make living and working environments comfortable and efficient.Once, when I pressed Connect on the EIM first, the thermostat would not go into "Add a Device" mode complaining of another wireless devices listening -- perhaps, the EIMs are meant to be connected differently from sensors for some reason? They are also powering the totally wireless communication betweem my stat and the furnace via the equipment interface module which is in turn hard wired to the furnace. Right now there are absolutly no wires connected between the stat and the furnace or the equipment interface module. Sorry, but I'm new to this forum and I couldn't figure out how to do a post other than to reply to this thread.

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