DIY Dad giving an overview of the installation of the Aprilaire 700 Automatic whole home humidifier. Here are the parts I purchased for the installation. Search Lowes for these item/product numbers. Wire Terminal Kit: 3364650 18-2 thermostat wire: 70086 (By the foot) 18-8 wire 175730 (by the foot) Copper Tube for Water Supply: 230509 What I already had: Drill- I used a 3/4 inch wood bit to get a hole in my return for the control unit. It wasn't pretty, but it worked. 3/4 inch drill bit for metal aren't cheap ($20 for a 3/4 inch drill bit) Wire nuts varied by size. Electrical tape.

A couple feet of indoor electrical wire. (12 gauge) Wire Cutters Wire Crimpers for Terminal Connections Tin Snips Screw Drivers Foil Tape for sealing duct work.

Jun 27, 2016. Provides vital service, temperature and relative humidity indicators in manual mode as well. Performs quietly with simple annual maintenance. Protect Your Family From Overly Dry Air. When you use the Aprilaire Model 700 Humidifier, you eliminate the unhealthy and damaging effects of overly dry air on. The Aprilaire 700 is a whole-home humidifier that comes with a digital humidity controller. Depending on the layout of your duct system, you can also install the humidifier on the return duct. Select a spot. To find a model that suits your budget, type 'Aprilaire 700' into the Search bar at the top of any eBay page.

I am completely confused on the Aprilaire wiring schematic. The himidistat itself needs 24V AC which I can get from the transformer on the switch-box housing mounted to the furnace. If the Honeywell fan board on my new Heil furnace has the 'EAC' and 'HUM' accessory terminals (which are on the 115V AC side of the internal transformer), how do I connect the 2 leads that run from the humidifier to the humidistat?? The humidifier itself has a grounded 115V AC plug for the fan and also has a transfomer itself inside.

I think I got it?! (obviously you have seen the Aprilaire 700 schematic)? I am going to wire some type of transformer (I'm not sure where I will mount it).

The 115 (primary) side of the transformer will be connected via spade terminals to the HUM on my funace fan board (since the furnace panel schematic shows those terminals as being on the 115 side) and the 24V side will run to those two wires shown at the top left corner of the Aprilaire manual (24V terminals on the humidistat), then I will wire the 2 wires from the solenoid valve DIRECTLY to the AA terminals on the humidistat and run the outdoor temp sensor and plug in the 115 gounded plug for the fan. Creasy And Resnick Pdf To Jpg. By using the fan board for a 24V source, I am also gaining a current sensing relay (Instead of using the 'Model 50').right? Does that sound correct? The fan in the Aprilaire will only run when the furnace fan board tells the Humidistat via 24V connection, which in turn triggers the solenoid valve right? Why is there even a 24V transformer built into the Aprilaire??