Aprilaire 700 Series Transformer Wiring

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Aprilaire 700 Series Transformer Wiring

Рет қаралды 23,512

Күн бұрын

This is how I wired the transformer for the aprilaire 700 series. This video is intended as a resource for others; follow at you own risk.

Пікірлер: 23

@EuropaSteve 2 жыл бұрын

Hi, The Gf wire from the digital humidistat controls the furnace fan on and off, and the H terminals control the water valve. It doesn't matter where the transformer gets it power from. Wiring from EAC won't hurt but it makes no difference in how the digital control unit operates. It does make a difference when using the manual 700m controller.

@americanmobilestudio8402 2 жыл бұрын

Thanks for the video! You pointed me to the correct terminals on my new Carrier HVAC. Appreciate the help!

@Robert0286 2 жыл бұрын

Glad it helped!

@MrPhatties 2 жыл бұрын

This is great. Better than the aprilaire video 😌

@rkk158 Жыл бұрын

Indeed it helped me.

@jinchoe6354 Жыл бұрын

It says on the manual do not wire transformer into furnace blower circuit though?

@hutchuck1454 Жыл бұрын

I have a Carrier furnace as you..your control board is a little different from mine. Does your control board have ODT TERMINALS. if not where did you hook up your outdoor sensor to? Great video by the way!!

@Robert0286 Жыл бұрын

Thanks! My outdoor sensor wired directly into the Aprilaire automatic humidity controller.

@jaym48 2 жыл бұрын

i just replaced my bryant 700m whole house humidifier with the aprilaire 700m and did not want to mess around with changing the transformer or humidistat controller (manual not digital)....the transformer is smaller but the values are the same; however, it does not turn on when the furnace activates.....should i assume the transformer and or the control must be replaced too? (original transformer : input 120 v / 60hz output 24 v 40va and aprilaire is input: 120v-60hz 15w utput: 24 v - 0.42 a 10w)

@Balticblue93 Жыл бұрын

The Bryant 700m and the Aprilaire 700M are the same exact unit. You should have gotten the Automatic and you would be setup perfectly.

@omranel-khatib4117 2 жыл бұрын

Does it matter what neutral you tie the transformer into?

@Balticblue93 Жыл бұрын

Not that I have found, I just tie into a neutral, if there isn't a free plug on the board.

@victorvek5227 2 жыл бұрын

I thought the unit was supposed to be installed on the return side?

@Robert0286 2 жыл бұрын

According to the manufacturer you can install this unit on the return side (needs hot water tap if done this way) if there isn’t space available on the supply side. However better performance will be achieved if on the supply side.

@MrPhatties 2 жыл бұрын

The unit is supposed to go on the supply side.

@Balticblue93 Жыл бұрын

You can installed it on the return or the supply side. I personally like the return side because it gives the atominzation a chance to get spread in the air channel and throwing up the supply side. I have my 700 Automatic running year around here in Colorado. The Model 60 humidistat is truly automatic. I said it around 35-38% and it holds it perfectly. I do run the hot side off my water heater and works wonderufully. I own an HVAC business that also does Home performance upgrades and modifications. I sell these units mostly the 700 Auto and the 800 models with every new Furnace and AC unit. I build it into the price at just over cost and to cover the labor.

@DanA-eb4ik 2 жыл бұрын

Do you really need the transformer? I have seen a few videos where they don't use the Transformer. I am also considering connecting my 700m directly to my nest thermostat using the * connection port on the nest, this way the nest can be programmed with a target humidity level and trigger the blower and humidifier to circulate air until the level is hit-- and many diagrams I've seen bypass the transformer completely. What do you think?

@Robert0286 2 жыл бұрын

Transformers change the voltage and not having it installed would send the incorrect voltage and possibly damage the unit. I would not recommend bypassing the transformer.

@rkk158 Жыл бұрын

The older 700 series did not have the 24V transformer, the most recent one does require

@EcjebJr Жыл бұрын

Depends on furnace and the board. Some furnaces HUM terminals are at 24v and some are 120. Always check before installing.

@Balticblue93 Жыл бұрын

I was told by an HVAC teacher and collegue that depending on the unit and the board, you might not need the transformer at all. He said the board has plugs that product 24v-40v directly on the board. I am meeting with him Thursday to go over it. What bothers me is that the unit runs on 120 volt for the fan. They could have easily wired in a transformer into the system and run it all off the wall plug. All it would need is the connections to the mainboard and Model 60 humidistat. And do not use those damn needle valves.

@thomaskaraindros28 Жыл бұрын

@@Balticblue93 ive never used the transofrmer and i install 100s of humidifiers. Take one wire from humidistat, one wire from solenoid, meet them in the furnace and tie them together. Take the second wire from the humidistat and put it on W or HUM if its a 24v plug. Take the other wire from the solenoid and put it to C. Works 100% and Ive never had an issue. This only works with the manual one though. Digital is different like the one in the video.