Departments
Brands
Top Brands
Brands You Follow
Stores
Nearby
You Visited
You Follow
You Search For
Topics
Hottests Topics
Catalogs
Featured Catalogs
People
Trendsetters
People Like You
Apps
Your apps
Discover apps
Get Advice
Top Questions
Your Q&A
Friends Asked
Ask A Question | Show All Questions
More on ShopYourWay
Manage My Life

How to wire a humidistat to my thermostat.

by Manage My Life Last activity date:
March 17th

We have a home in Florida, go north in the summer,and have the temp set at 78. We get high humidity and I want to install a humidistat to control the humidity without having to lower the temp. How do I do the wiring?

Tags:
Appliances
Be the first to comment
Ask your friends
Answers (19)
ALAN Rutherfurd
how can I get a copy of wiring diagram. I see comments on answers but not the answers
by ALAN Rutherfurd
March 17th
| Be the first to comment
0 votes
scott d
Bill, thank you for using Manage My Life.
by scott d
January 24th, 2012
| Be the first to comment
0 votes
Manage My Life
Scott, thanks for all of your help! Hopefully this will be the end of my questions.
by Manage My Life
January 24th, 2012
| Be the first to comment
0 votes
scott d
Yes, that is correct Bill. It appears that keeping it on, keeps the contact closed and by-passes the thermostat.
by scott d
January 24th, 2012
| Be the first to comment
0 votes
Manage My Life
If I read you correctly then I'll simply ignore the instruction that says to keep the humididistat in the ON position when home and simply set it to the desired humidity level and the thermostat to the desired temp.
by Manage My Life
January 23rd, 2012
| Be the first to comment
0 votes
scott d
Bill, I'm sorry you are having this problem. Looking at the diagram, if the humidistat stays on and the contact stays closed, it appears to by-pass the thermostat keeping everything running. When it's set to a level and the humidistat is satisfied, it allows the thermostat to work and cycle the unit again.
by scott d
January 23rd, 2012
| Be the first to comment
0 votes
Manage My Life
Scott D. The humidistat seems to be working ok with one exception. The instructions say when home to leave it set in the “ON” position. When I do this with the thermostat set at to cool and 74 degrees the system just keeps running and running. The humidity gets down to 50% - 55% and the temp drops below 70 degrees. If I turn the humidistat to say 55% the system will shut off, the temp will rise back to 74 and the humidity levels are at about 55%.
by Manage My Life
January 23rd, 2012
| Be the first to comment
0 votes
Manage My Life
Ok, this is the diagram I also found at etcsupply but just wanted to verify with the expert before I wired it backwards and ruined the controller or something else. Thanks, Bill
by Manage My Life
November 28th, 2011
| Be the first to comment
0 votes
scott d
I suggest wiring it as shown in the picture listed below. This is the diagram listed for this controller. Here is the link, etcsupply.com/manuals/j10-809_instruction_sheet.pdf. I cannot see a red dot listed on the diagram. I hope this will help you.
by scott d
November 28th, 2011
| Be the first to comment
0 votes
Manage My Life
Hi Scott. I found the Ranco J10-809 dehumid. controller that at one time was hooked up but some technician took it off. Anyway, there are no wires attached just 2 lugs for hooking on wires. Now to the issue. I found an instruction sheet on the web but as I look at it the #1 (outside) lug on the controller there is a "red" spot painted under the lug. When I look at the diagram the #1 (outside) lug shows as going to the yellow on the thermostat and the #2 (inside) lug shows going to the red on the thermostat. Should I ignore the red dot and hook the red to the #2 lug and the black to the #1?
by Manage My Life
November 26th, 2011
| Be the first to comment
0 votes
scott d
Thank you and Happy Thanksgiving to you also.
by scott d
November 23rd, 2011
| Be the first to comment
0 votes
Manage My Life
Hi Scott. I think you've given me all the answers so I'll go buy the humidistat and give it a go. Happy Thanksgiving to you, your family and all of the Newbies, Dabblers, Aficionados, Gurus, Maestros and Experts.
by Manage My Life
November 22nd, 2011
| Be the first to comment
0 votes
scott d
Thank you, I would recommend wiring it in parallel, so each stat can work independently. It can be wired direct to the thermostat screws.
by scott d
November 21st, 2011
| Be the first to comment
0 votes
Manage My Life
Scott D...The instructions mention wiring in series or parallel. Your instructions are for parallel. Is that the preferable way when we are away so the temp (cooling) doesn't need to be set to low? Also, do you make the hook up with small wire nuts or direct to the screws on the thermostat?

I wish I could give you 10 stars as I really appreeciate the help.
by Manage My Life
November 21st, 2011
| Be the first to comment
0 votes
scott d
Thank you for the part number. Now, the a/c unit itself is a very good dehumidifier. I'm attaching the wiring instructions, to connect the humidistat to the thermostat. It will need to be connected to the Y and R terminals as shown. I hope this will help you.
by scott d
November 21st, 2011
| Be the first to comment
0 votes
Manage My Life
Thanks for your replies, sorry I so late in responding. First, I have a heat pump here in Florida so the issue is not humidifying but keeping the humidity down.
Now the details:
Humidistat: Honeywell #H46C1166
Thermostat:Honeywell (Non-Programable) #RTH3100C1002
by Manage My Life
November 20th, 2011
| Be the first to comment
0 votes
scott d
Thank you for your question. Unfortunately, I will not be able to provide any specific information without the model number of the dehumidifier and also the type and model of the thermostat. This could be difficult without actually seeing what is there now and I would recommend having a technician check this, to be able to see and to determine what will need to be done. I'm attaching a site you can access, to have a tech come out. Here is a link for the website:

Sears Home Services

. If you would like more assistance, reply to this thread and please include the model numbers and I will be glad to assist you further.
by scott d
November 9th, 2011
| Be the first to comment
0 votes
Manage My Life
I know this type of information can be very helpful for you to have. While you are waiting for your expert answer, I did some research on the unit. I was unable to locate information that would be helpful with regards to your question at this time. Your expert will answer within 24-48 hours with detailed information. Thank you for using Manage My Life.
Answered in 3 minutes
by Manage My Life
November 7th, 2011
| Be the first to comment
0 votes
Manage My Life
Managemylife.com is a great place to find the answers to just about anything, especially on appliances. I would suggest that you provide a little more information such as the make and complete model number of your product so your expert will be able to provide you the best possible answer. Just click on reply below where you can provide the additional information.
Answered in 2 minutes
by Manage My Life
November 7th, 2011
| Be the first to comment
0 votes
Add your own answer
Sign in to answer a question
Didn't find what you are looking for? Ask a question