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01-28-2011, 10:59 AM
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#29
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Junior Member
Join Date: Oct 2010
Location: Glendale, AZ (Phoenix)
Posts: 11
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Fans dc / ac or Atomic ? 8O) =
Dr4Film
(Quote)
"These fans are NOT 120 volt AC converted to 12 volt DC. The poster that stated that fact earlier is totally wrong."
Possibly I did not make myself perfectly clear? I stated that the fans are 12 VDC, but are converted to AC so as to eliminate the interference that would be caused by a DC motor's brushes.
The only point was, a computer fan will not run if the black wire is connected to the positive and the red wire to ground.
To reverse the airflow you would have to turn the fan's frame 180 degrees.
True all DC motors with brushes are reversible by crossing the wires.
Should have let the point go as the original poster was happy with the way his blew anyway. )
Jim
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01-28-2011, 01:39 PM
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#30
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Senior Member
Join Date: Aug 2009
Posts: 1,696
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Quote:
Originally Posted by JAMESRAYSR
Dr4Film
(Quote)
"These fans are NOT 120 volt AC converted to 12 volt DC. The poster that stated that fact earlier is totally wrong."
Possibly I did not make myself perfectly clear? I stated that the fans are 12 VDC, but are converted to AC so as to eliminate the interference that would be caused by a DC motor's brushes.
Jim
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YUP - I, for one, understood your earlier post and point perfectly - was going to comment to "Dr4film" accordingly, but got sidetracked...
__________________
John Day....|'88 Winnebago Super Chief 27ft. Class A Eastern .....|'88 KIT model 240 24 ft. 5er Oregon ......|'02 Dodge/Cummins 2500 Quad Cab
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01-29-2011, 06:00 AM
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#31
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Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
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OK, guys, I now understand what you were trying to convey about the differences between AC and DC motors.
Thanks for making it clearer for me. I'm not an expert when it comes to electrical stuff, I leave that for my two brothers who are EE's to help me with, so I basically know enough to be VERY dangerous.
Dr4Film ----- Richard.
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01-29-2011, 07:35 PM
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#32
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Senior Member
Join Date: Aug 2010
Posts: 2,772
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How did you mount the 'blue' fan set up to the cooling fins. Basically I just used the alligator clip (which ended up being the ground wire) to clip to the fins which grounded the unit. This is a very tentative attachment at best. The positive wire I just attached to the connection on the light so when the fridge is on and the light is off (fridge is closed) the fan runs. When the door is open and the light is on the fan stops.
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01-30-2011, 08:47 AM
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#33
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Oct 2009
Location: Lakemurray,SC
Posts: 1,302
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Fans stopping when the door is opened is good, so as not to move all the cold air out when the door is open.
__________________
2004 Pace Arrow 37-C WH W-22 (sold)
2012 Jeep Wrangler Sahara toad or
2005 Harley/Lehman trike/Featherlite trailer
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01-30-2011, 09:42 AM
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#34
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Senior Member
Damon Owners Club Workhorse Chassis Owner Forest River Owners Club Ford Super Duty Owner
Join Date: May 2005
Location: Parker, CO
Posts: 3,251
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Quote:
Originally Posted by firedoc
How did you mount the 'blue' fan set up to the cooling fins. Basically I just used the alligator clip (which ended up being the ground wire) to clip to the fins which grounded the unit. This is a very tentative attachment at best. The positive wire I just attached to the connection on the light so when the fridge is on and the light is off (fridge is closed) the fan runs. When the door is open and the light is on the fan stops.
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I just installed mine yesterday. It seems like a nice fan but mounting it is not as easy as it sounds. I could'nt figure how to mount it except to hang it on the fins from the clip. I did'n't like that. I also thought and found the ground wire and clip were too short and stiff so I spliced in an extra 6" of wire.
I ended up mounting it under the cooling fins supported with a short piece of wood held in place with double sided tape to the water 'catch tray'. If I come up with a better idea for mounting, I can always change it later, but this seems like it might be ok. I can turn it off easy by disconnecting the clip when I want.
I like 'firedocs's' idea of this " When the door is open and the light is on the fan stops.[/QUOTE]" . I do not know how you did this. Can you elaborate a little more on this?
__________________
Max49
2018 Forest River Georgetown F-53
'08 Jeep Wrangler Toad
Denver, Colorado
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01-30-2011, 03:19 PM
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#35
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Senior Member
Winnebago Owners Club
Join Date: Oct 2009
Posts: 1,170
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What part of the light fixture is the hot wire attached to? Joe
__________________
2008 Itasca Latitude 39W. Cummins ISB 6.7 Turbo 340HP. Allison 6 Speed. Freightliner XCS. Michelin XRV 255/80R 22.5 LRG. SuperSteer MCU. Safe-T-Plus.
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01-30-2011, 03:50 PM
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#36
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Senior Member
Tiffin Owners Club
Join Date: Jan 2009
Location: Orange Beach, AL
Posts: 744
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Could the plug be there to keep critters out?
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01-30-2011, 04:14 PM
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#37
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Oct 2009
Location: Lakemurray,SC
Posts: 1,302
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azloafer, use a volt meter or voltage tester and find the switched 12 volt connection. It will give 12 V when the door is closed and 0 V when the door is open (light on).
__________________
2004 Pace Arrow 37-C WH W-22 (sold)
2012 Jeep Wrangler Sahara toad or
2005 Harley/Lehman trike/Featherlite trailer
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01-30-2011, 06:56 PM
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#38
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Senior Member
Join Date: Aug 2009
Posts: 1,696
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Quote:
Originally Posted by Pete & Linda
azloafer, use a volt meter or voltage tester and find the switched 12 volt connection. It will give 12 V when the door is closed and 0 V when the door is open (light on).
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YUP - but the fans need full-time 12 volts to operate properly - not only when the door is open and the light is lit!
Some here assume that all refrigerator interior lights operate by switching the ground side lead, leaving power "on" to one side of the light whenever the refrigerator is in operation...
Believe it or not - ALL RV refrigerators DON'T work thataway!
As, for instance, the Dometic in our 5er - and the Norcold in our MH! SO, on those, another constant 12 volt source has to be located and provided, which is why I earlier mentioned and provided a picture of the method used on our MH - 'twould be sorta foolish to dig around other places outside the refrigerator for a steady 12 volt source, IF there was one already there, just inches away INSIDE the refrigerator...
__________________
John Day....|'88 Winnebago Super Chief 27ft. Class A Eastern .....|'88 KIT model 240 24 ft. 5er Oregon ......|'02 Dodge/Cummins 2500 Quad Cab
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01-30-2011, 07:37 PM
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#39
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Senior Member
Join Date: Aug 2009
Posts: 1,696
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Quote:
also thought and found the ground wire and clip were too short and stiff so I spliced in an extra 6" of wire.
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UMmmmmmm - well, yeah, but that "short and stiff" piece of wire is ACTUALLY what is there to locate and secure the fan up next to the fins of the refrigerator to allow the fan to be placed wherever you select along the width of those fins, which are also the ground return for the fans - the fans can simply hang from the wire and clip - or, usually, be placed on the rear edge of the adjacent refrigerator shelf - sorta like this...
The short stiff wire already provided with the fan is simply bent as needed for best mounting position of the fan.
Nothing wrong with the method you used - just maybe unnecessarily complicated?
By the way - check out the fins in that refrigerator - the refrigerator has been in constant use since before Thanksgiving - freezer temp is -4 degrees - and refrigerator temp is a uniform 20 degrees - with the thermostat on 6 - NO frost buildup, and the refrigerator is nearly full of stored food..
__________________
John Day....|'88 Winnebago Super Chief 27ft. Class A Eastern .....|'88 KIT model 240 24 ft. 5er Oregon ......|'02 Dodge/Cummins 2500 Quad Cab
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01-30-2011, 09:54 PM
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#40
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Oct 2009
Location: Lakemurray,SC
Posts: 1,302
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Gary there should be 12 v at the switch or lamp whether it switches the hot side or the ground. You did not read my post correctly, my Dometic is like firedoc's and as I said in my last post. Reff on door closed fan RUNS, door open light is on fan is off.
__________________
2004 Pace Arrow 37-C WH W-22 (sold)
2012 Jeep Wrangler Sahara toad or
2005 Harley/Lehman trike/Featherlite trailer
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01-30-2011, 10:05 PM
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#41
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Senior Member
Winnebago Owners Club
Join Date: Oct 2009
Posts: 1,170
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With my limited understanding of electricity, I am going to go out on a limb here and say that the light in the fridge is 12 volt. [?] Otherwise I'll get fried in there!
__________________
2008 Itasca Latitude 39W. Cummins ISB 6.7 Turbo 340HP. Allison 6 Speed. Freightliner XCS. Michelin XRV 255/80R 22.5 LRG. SuperSteer MCU. Safe-T-Plus.
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01-31-2011, 05:41 AM
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#42
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Senior Member
Fleetwood Owners Club Workhorse Chassis Owner
Join Date: Oct 2009
Location: Lakemurray,SC
Posts: 1,302
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Yes 12 V.
__________________
2004 Pace Arrow 37-C WH W-22 (sold)
2012 Jeep Wrangler Sahara toad or
2005 Harley/Lehman trike/Featherlite trailer
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