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 > Your search for posts made by 'pulpwood007' found 28 matches.

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RE: Refrigerator cooling question

MitchF150: Great looking install! Please tell me about the fan control with temp sensor. Did you purchase this as a unit or did you make it? What are the specs on your fans? It looks like this is in your top vent so I assume it is pulling air over the coils and out. That was the way I had mine rigged on previous trailer except I had a top vent in roof of trailer. My new trailer is like yours, side vents only top and bottom. What is the pool noodle for, and do you really like your beer cold?
pulpwood007 06/04/20 04:15pm Tech Issues
RE: Refrigerator cooling question

Thanks for the good information. I'm aware of correct installation procedures and venting. As per the OP I'd really like to hear about running fans continuously or intermittent. My previous trailer had 3 X 140mm computer fans pulling air out of the exhaust continuous and it worked pretty good. I'm interested if "only" using fans during the cooling cycle would be better.
pulpwood007 06/04/20 01:03pm Tech Issues
RE: Arkansas State Parks to open...

I've never stayed in a state park in AR, but I want to go to Cotter to do some fishing. I don't need a fancy resort just to spend the night. What's the best deal in the area? Thanks Bulls Shoals State park is right below the dam and offers good tailwater fishing when they are not running water. It's about a 30 min drive down to Cotter. There is a nice private RV park at Cotter right on the river. Denton Ferry RV Park.
pulpwood007 06/04/20 09:56am RV Parks, Campgrounds and Attractions
Refrigerator cooling question

I have followed all the threads involving improving cooling on RV refrigerators. My Norcold is a constant problem to keep the temps at around 40 degrees. My question is in regards to installing additional fans, both blowing across the coils and inside the fridge to circulate the air. There are controllers sold to only activate the fans when the refrigerator is running (in the cooling mode). They turn off after the cooling cycle is complete. Other folks just simply install fans that blow across the coils, and circulate air inside the fridge and control them manually. Either leaving them running continuously or turning them on when the fridge will not maintain correct temps. Are there any issues in letting the fans run continuously? Less efficiency?
pulpwood007 06/04/20 09:45am Tech Issues
RE: Improving Fridge Cooling

The RV fridges I’ve seen with a factory installed fan inside them has been at the very top, with the air blowing towards the fins. The one I’m thinking of was in a Norcold fridge, and it looked like a centrifugal fan laying flat against the top of the reefer compartment. It was inside a plenum box that directed the air across the width of the fins. I made one for my fridge with a small 12v fan that was in my junk pile. I used it because it’s small, and it’s the right voltage. I tapped into the power going to the interior light, and it runs full time when the fridge is turned on. :):) Since you are using the interior fridge light as a 12vdc power source I assume the light does not go off when the fridge door is closed?
pulpwood007 05/27/20 09:32am Tech Issues
RE: Improving Fridge Cooling

First, absorption units do better on propane and 110v than they do on 12v. The 12v is only there to try an maintain temps while traveling. Second, minimize putting warm things in, so limit the number of times and the length of time you have the unit open and try not to put a lot of things in at the same time that aren't already cooled down. Third, they all work by transferring the heat to the outside via the cooling coils in the back of the unit. For most installations that uses just normal airflow over the coils - since hot air rises it brings in cooler air at the bottom and exits at the top. Units installed with a top roof vent work better than units with the top vent on the side. Most manufacturers don't follow the recommendations for clearances in the back where the coils are and usually allow too much space. Limiting the space to the recommendations using baffles and such helps with the airflow. Adding fans can help, but be careful. Just moving a lot of air may not be as effective as moving the right amount of air over the coils. Faster air can create a turbulent airflow and a laminar airflow is what you want for maximum heat transfer. Finally, since the unit's performance is based on the ability to transfer the heat outside thru the coils, the temp difference between the air at the coils and the outside air is important. Try not to park your RV in such a way that the sun is heating the area where the refrigerator is located. And remember that at most the unit can probably create about a 40 degree F temp difference, so it will work better when the outside temps are around 70 than it will when the temps a pushing triple digits. I cannot tell a lot of difference in performance on LP vs. 120VAC. I try to achieve laminar airflow by using the same amount of CFM at bottom of coils and at top (exhaust). Within reason, I'm not sure why having more air passing over the coils would be a negative issue. Living in Texas, I sure need more than a 40 degree differential from the ambient outside temps. I've been able to achieve that at times but not always. Humidity seems to play a large role. My previous trailer exited at the top, and required me removing the fridge and building new baffles. My new Grand Design trailer exits on the side of the slide, and looks as though they followed manufactures specs so I don't feel that's an issue. I'm definitely going to add some fans but also looking at the ARP Fridge Defend system. I may use my muffin fans and not their squirrel cage type. I have yet to determine if the add on fridge interior fans do that much. Thanks for all the replys.
pulpwood007 05/25/20 02:16pm Tech Issues
RE: Shore power plug conversion?

I used PVC pipe and made a support stand that cradles the 50 amp cord right at the connector. It is adjustable for different heights based on campsites. Takes all strain off the screw on electrical connector. Cheap and easy to make.
pulpwood007 05/25/20 10:18am Fifth-Wheels
Improving Fridge Cooling

I did a search and read some of the posts regarding modifications to RV refrigerators. Seems like there are several ways to improve cooling, and some that don't work so well. I would like to hear any about modifications that you have made to to your Dometic or Norcold fridge that improved the cooling in hot weather. Especially how many degrees you were able to drop the temps to.
pulpwood007 05/25/20 09:41am Tech Issues
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