TrailManor Owner's Forum  

Go Back   TrailManor Owner's Forum > TrailManor information you won't find anywhere else
Register FAQ Members List Calendar Mark Forums Read

Closed Thread
 
Thread Tools Display Modes
  #1  
Old 09-06-2016, 02:05 PM
Bill's Avatar
Bill Bill is offline
Moderator
 
Join Date: Feb 2003
Location: The mountains of Scottsdale, AZ, and the beaches of Maine
Posts: 8,445
Default Adding thermostat control to the refrig during DC operation

Many TM owners don't realize that when the refrigerator is switched to battery (12 VDC) operation, there is no thermostatic control. The refrig operates at max cooling all the time. Among other annoyances, this will freeze the food in the refrig. On another RV Owners web site, I recently ran across an article showing how a reasonably simple mod to the refrig will add thermostat control during DC operation. With the permission of that web site's owner, I copied relevant parts of the article. It is attached.

Bill
Attached Files
File Type: pdf Modifying the Norcold Thermostat.pdf (17.7 KB, 362 views)
__________________
2006 2720SL swing tongue, 15" tires
2014 Ford F-150 5.0L
Bill's Tech Stuff album
  #2  
Old 02-05-2017, 07:49 PM
Bill's Avatar
Bill Bill is offline
Moderator
 
Join Date: Feb 2003
Location: The mountains of Scottsdale, AZ, and the beaches of Maine
Posts: 8,445
Default

The author of the DC Thermostat Control document has expanded the idea to make a small improvement.

As noted in the above document, the original circuit draws a small amount of DC power even when the refrigerator is being run on gas. This is not a big deal unless you are boondocking for a long period. The updated approach requires one more relay, but eliminates that small DC power drain.

Bill
Attached Thumbnails
Click image for larger version

Name:	Two relay.JPG
Views:	169
Size:	50.9 KB
ID:	14653  
Attached Files
File Type: pdf N300.3Thermostat2RelayDrawing.pdf (10.2 KB, 148 views)
File Type: pdf N300.3Thermostat2RelayInstallationInstructions.pdf (107.0 KB, 155 views)
__________________
2006 2720SL swing tongue, 15" tires
2014 Ford F-150 5.0L
Bill's Tech Stuff album
  #3  
Old 02-16-2017, 04:00 PM
Bill's Avatar
Bill Bill is offline
Moderator
 
Join Date: Feb 2003
Location: The mountains of Scottsdale, AZ, and the beaches of Maine
Posts: 8,445
Default

I have been reminded that several years ago, one of our members, Rickst29, developed a new and excellent approach to controlling the refrig temperature in both AC and DC operation. His approach provides a degree of control that is much better than the basic thermostat in the N300 refrigerator can provide. He outlined it in a number of very detailed posts here on the TMO Forum, including some in this thread.

http://www.trailmanorowners.com/foru...ad.php?t=13490

I encourage anyone who is thinking of making a change to check out his writeups.

Bill
__________________
2006 2720SL swing tongue, 15" tires
2014 Ford F-150 5.0L
Bill's Tech Stuff album
Closed Thread


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Trailer sway and sway control RockyMtnRay TrailManor information you won't find anywhere else 0 04-02-2005 09:34 PM


All times are GMT -6. The time now is 09:58 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 2011 Trailmanor Owners Page.