Aprilaire 700 Automatic Whole Home Humidifier Installation
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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.
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Omg good job!!! I did a video on the small handheld humidifiers but my skill will never extend to this! EVER!! Thank God people like you know how to do this stuff
Hook up the primary(black&white) side of the transformer to the switch. That way the auto feature will function as intended.
Do it yourselfers BEWARE …. The warranty on this unit does not apply unless installed by a licensed HVAC contractor.
Great video. So you wired the unit to run every time the fan turns on right. So if you ac or heat.. it runs?
Ron, I am impressed with your work. I have a couple concerns though.
1)The HUM terminal is really the terminal you want to use. HUM literally means Humidifier. The EAC terminal is really for the Electronic Air Cleaner. It is active whenever the fan is running on any speed, so the electronic air cleaner can only run when the fan is on. The humidifier should only be active during the heating season. When the A/C is on during the cooling season, it is actually de-humidifying and reducing the temperature of the air. If you run the a/c and humidifier at the same, they are fighting each other.
2) The saddle valve will eventually become clogged or may leak. Also using the saddle valve does not comply with many local codes.
3) The transformer is 24 volts not 10 volts. I think you are looking at the 10 VA power rating.
4) Lastly the wires should be squared off and held in place with plastic clips. This makes the job look much more professional. Also none of this wiring needs to be 12 gauge wire.
This the most impressive none pro I have seen. Thanks for sharing it.
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Thank you Ron. You saved my bacon. You explained the wiring of the transformer 24VAC/10VAC and the thermostat. I'm adept at reading automotive electrical schematics and even after you explanation, I didn't decipher the schematic the same way, but followed your lead and everything is up and running. Thank you!
You CANNOT use SADDLE VALVES! They are NOT CODE!!!
Thanks for taking the time to put this video together! I used this in combination with the wiring guide. Would have never figured out the EAC wire.
Note to others… my circuit board had a positive and neutral EAC port. Accidentally hooked to EAC neutral in error. The positive EAC port was buried behind other wires in my unit.
Awesome tutorial. You were well thought out and articulate in your process. Best one out there. Thanks bro.