Ecobee4 Wiring for By-Pass Humidifier


Old 11-15-19, 07:28 AM
Thread Starter
Join Date: Nov 2019
Posts: 1
Received 0 Votes on 0 Posts
Ecobee4 Wiring for By-Pass Humidifier

I recently re-wired two Lennox furnaces in my home, each with a Lennox Healthy Climate By-Pass Humidifier and a manual controlled humidistat. Model numbers for the humidifers are HCWB3-17 and HCWB3-18. I wired the Ecobee Power Extender Kit (PEK) at each furnace, and rewired my Ecobee thermostats to use the PEK. I reconnected the old C wire (Blue) to the ACC+ terminal on each thermostat. At the furnace, I connected the Blue wire (ACC+) to the disconnected "W" wire for each humidifier, and kept the other humidifier wire attached to "C" terminal on the furnace board. I configured each Ecobee for 1-wire setup (ACC+), and both furnaces appear to be operating as expected. Question: Can I leave each humidistat mounted to furnance as is, or do I need to remove and reconfigure/change the wiring at that location? I've read conflicting information on various threads.

Thanks in advance.
Sponsored Links
Old 11-15-19, 08:36 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,742
Received 1,186 Votes on 1,098 Posts
Welcome to the forums.

I'm not quite following your wiring but it sounds like it's working.
You can leave the old humidistats in line. Set them for max humidity.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: