RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 01-06-2013, 04:35 PM   #1
Senior Member
 
crah's Avatar
 
Join Date: Sep 2011
Location: Las Vegas
Posts: 704
Norcold 1200 muffin fans

I'd like to do the Norcold 1200 muffin fan mod at the roof vent. Anyone have a source for the fans? It looks like the 4 fan set up would be optimal but I couldn't get the links to work in from the threads I found in the search.

Thanks
__________________
Craig
2020 Winnebago View 24D
crah is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 01-07-2013, 04:14 AM   #2
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,063
Radio Shack is one of many sources for 12 dc computer fans.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 01-07-2013, 06:42 AM   #3
paz
Senior Member
 
paz's Avatar
 
Join Date: May 2005
Location: Full-timers - Home is where we park it.
Posts: 4,717
Google muffin fans. Check Amazon and eBay. Pay the extra maney and get fans with ball bearings. They will last longer than the ones with sleeve bearings. Since you will likely be removing the fridge to mount the fans, you don't want to be doing that every couple of years if one of the sleeve bearings starts to squeal.

For the Norcolds that came with fans, there are 2 mounted on top of the main coils. They are turned on when a sensor mounted to a fin on the very top coil reaches a pre-set temperature.
paz is offline   Reply With Quote
Old 01-08-2013, 11:48 AM   #4
Member
 
FreeByrd's Avatar
 
Join Date: Jan 2011
Location: Where Ever We Park It !
Posts: 65
DC Fan Sources

Hey Crah,
You might want to look at "Future Electronics" and "Digi-Key". I have purchased fans from them in the past and they have a wide variety, including ball bearing and a newer "Mag-Lev" design fan from Sunon with much lower amperage draw.

Be sure to look at amperage, CFM (Air Movement in Cubic Feet/Minute) and Db (noise) for each to match what you're looking for.
Here's the Digi-Key website for DC Fans, you can filter out what you don't
want with the menu at the top. Prices in the right column are reasonable.

Fans, Thermal Management | Fans - DC | DigiKey

See Ya Out There,
Mike
__________________
2013 Chevy 3500 Dually LTZ Durnamax/Allison LML 6x6
2015 DRV Mobile Suites 36' TKSB4
FreeByrd is offline   Reply With Quote
Old 02-05-2013, 12:17 AM   #5
Senior Member
 
crah's Avatar
 
Join Date: Sep 2011
Location: Las Vegas
Posts: 704
Hi mike


I bought 4 maglev 75 cfm Sunon fans from your digikey link. Thank you for the link. I have them mounted at the roof vent but haven't wired it up yet. Any suggestions? I think I see the original thermo disk/sensor on the condenser fin from the roof. Can I just splice those wires and tap into them and if so, can I make the wire connections with a small wire nut? I'm thinking if that is possible, I would run an extra hot wire directly and tie that to a switch inside the coach. Any tips or tricks would be appreciated.
__________________
Craig
2020 Winnebago View 24D
crah is offline   Reply With Quote
Old 02-05-2013, 12:41 AM   #6
Senior Member
 
Mr_D's Avatar
 
Country Coach Owners Club
Winnebago Owners Club
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,063
I ordered a surplus gang of four fans in an aluminum bracket last year from "All Electronics". Haven't mounted them yet so need to get busy and do it.
Cost was less than $15 but the last catalog I got from them didn't have them any more.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition
Mr_D is offline   Reply With Quote
Old 02-05-2013, 02:18 AM   #7
Senior Member
 
336muffin's Avatar
 
Join Date: Apr 2011
Posts: 2,569
I found mine at Radio Shack for $9.95, my roof hole used five perfectly. I didn't want to fill in the difference if I only used two or three it might restrict air flow when not turned on. I installed a manual switch to control them when I seen fit. I have not regretted doing so. I can access mine from the roof if I take the cover off.
__________________
American Tradition 42R-Cadillac SRX Blue Ox Koni 5050XL MCD Scangauge D Samsung rf197
Fulltime since 2012
336muffin is offline   Reply With Quote
Old 02-05-2013, 04:16 AM   #8
Senior Member
 
Gorlininc's Avatar
 
Monaco Owners Club
Join Date: Jun 2012
Location: Merritt Island, FL
Posts: 1,742
Hi
I have a Norcold 1210 refrig . I know about their recalls. I'm fairly new at all this. Why are fans being placed in the roof vent of the Norcold. I never heard of that before.
Btw. I put a temperature gauge in my fridge and freezer today. Frige is 34 degrees and freezer is 9 degrees. Not too bad. Ice cream is frozen. I had some today.
Gorlininc is offline   Reply With Quote
Old 02-05-2013, 08:23 AM   #9
Senior Member
 
336muffin's Avatar
 
Join Date: Apr 2011
Posts: 2,569
My Norcold averages -3 in the freezer and 36 in fridge on setting #3 with the fans off. We have done the Amish cooling unit.
__________________
American Tradition 42R-Cadillac SRX Blue Ox Koni 5050XL MCD Scangauge D Samsung rf197
Fulltime since 2012
336muffin is offline   Reply With Quote
Old 02-05-2013, 08:49 AM   #10
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Freightliner Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,936
[QUOTE=Gorlininc;1453564]Hi
I have a Norcold 1210 refrig . I know about their recalls. I'm fairly new at all this. Why are fans being placed in the roof vent of the Norcold. I never heard of that before. .../QUOTE]

The purpose is to help air movement over the cooling unit. The more air the moves over them, the more heat is dissipated helping the cooling unit to work better.

When the refer is NOT in a slide out then it vents straight up through the roof vent. Sometimes the construction creates some "dead space" above the refer (my Winnebago had one) that seems to disrupt the flow. The theory behind the fan up close to the roof vent is to "force" more air flow. When I had the Amish Cooling Unit installed, I had them add a fan. It all seemed to help.

RVs with the refer in the slide out have baffle to vent out the side of the slide out. Again, there is some thought that adding a fan or 2 helps increase the airflow over the cooling unit coils.

BTW, if I had to do it again, I would have put in a separate switch to control the extra fan. During cool weather it wasn't needed.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 2015 DSDP 4320 4369, FL Chassis, 2013 CR-V 2020 Jeep Overland, Blue Ox Avail, SMI AF1.
Sky_Boss is offline   Reply With Quote
Old 02-05-2013, 10:27 AM   #11
Member
 
FreeByrd's Avatar
 
Join Date: Jan 2011
Location: Where Ever We Park It !
Posts: 65
Hi Crah,
I found it easier to access the 12 volt feed to the fridge. This is the 10 ga. wire supply for the circuit board in the back of the unit. I used a 3 way splice and power the fans with 2 Single Pole, Single Throw (automotive) switches. One runs one of 3, the other runs the other 2 and allows me to pick how much air movement I want given the outside temp.
If it's easier to pick up the "Hot" side of the fan Thermostat, that would also work given the low amperage draw. I'd still install a low amperage fuse to be safe.
My switches are in my lower fridge vent, you might want to think about installing them inside the rig near the fridge if you have access. . . . just easier to work with.
Mike
__________________
2013 Chevy 3500 Dually LTZ Durnamax/Allison LML 6x6
2015 DRV Mobile Suites 36' TKSB4
FreeByrd is offline   Reply With Quote
Old 02-05-2013, 11:00 AM   #12
Senior Member
 
Join Date: Nov 2007
Location: somewhere in the west
Posts: 1,168
My thoughts are for the fans to be pushing air onto the coils so the hot air rises throuth the normal configuration.

Muffin fans are not able to suck air in even a fraction of the efficiency of the pushing of air, by design.

Also, two muffin fans with and on/off switch installed at the coils are easily accessible as needed.

Ed
Ed-Sommers is offline   Reply With Quote
Old 02-05-2013, 11:45 AM   #13
Registered User
 
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
This how I did it back in the summer of 2010 when we were staying in Fairbanks Alaska.

Post #12.

http://www.irv2.com/forums/f54/addin...dge-86697.html


The fans I chose were from Amazon and they had the new Sony S-FDB bearing technology.

Scythe S-FLEX™ S-FDB 120mm FAN

Those 75 CFM ones are no longer available but the SFF 63 CFM ones are from Amazon.

Amazon.com: Scythe S-FLEX SFF21D / 120mm 800rpm Fan.: Computers & Accessories

I have recently sold the package to another iRV2.com member. I installed a Samsung residential back in April 2012.
Dr4Film ----- Richard
Attached Thumbnails
Click image for larger version

Name:	IMG_0329.JPG
Views:	66
Size:	93.1 KB
ID:	33119  
Dr4Film is offline   Reply With Quote
Old 02-05-2013, 12:28 PM   #14
Senior Member
 
crah's Avatar
 
Join Date: Sep 2011
Location: Las Vegas
Posts: 704
Thank you for all the info.


To some of the posters asking why the fans, I need them due to the poor performance my my Norcold due to two conditions. The Norcold works fine if the weather is below 88 or so. Above that and it struggles to get below 43 degrees. Also when I drive, I discovered the wind turbulance traps the hot air and my temp climbs almost up to 50 if it is above 90 out. The fans will create a constant exhaust which aids the cooling process for these absorption refrigerators.

My factory set up came with two fans that are mounted midway that blow up but is useless as the turbulance just traps the hot air.

My set up with the 4 fans almost takes up the entire roof vent opening which will work great for exhausting the air.

On a final note, I never realized my fridge temperature rose when driving until last summer. I put a remote temp sensor and the display at the drivers seat. That's when I discovered it.

I guess I lived through the previous years not knowing my food was getting warm.
__________________
Craig
2020 Winnebago View 24D
crah is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 02:15 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.