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Old 08-13-2020, 07:43 PM   #1
Mini-Skoolie
 
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Norcold 3 way refrigerator wiring question

I Purchased a norcold 3215 3 - way refrigerator. The installation instructions include the 12 V connector which discusses high current supply, low current supply and D+ signal? Huh? The high current supply comes from my do you spell? So does the low current supply? And what is the D+ signal when the engine is running? I’m not really sure how to proceed! Any help is greatly appreciated...
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Old 08-14-2020, 04:35 AM   #2
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Could you post the pertinent part of the instructions (like a clear photo or a scanned PDF) ... with perhaps the circuit diagram from the instructions?
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Old 08-14-2020, 08:44 AM   #3
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Maybe this link will help???

https://www.rv.net/forum/index.cfm/f...g/29746448.cfm
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Old 08-14-2020, 06:07 PM   #4
Mini-Skoolie
 
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Hope these help!
The best I can tell the D + signal is attached to the ignition circuit for the engine. The high current supply would be to run the refrigerator say off of the battery bank or the alternator in the low current supply would be strictly from battery power when running propane… I just want to make sure I have a good beard on this before I burn a hole in a $1200 refrigerator!

Ultimately my plan:
Wire the fridge to my battery bank.
Use solar to charge bank
Run propane off grid
Shore power on grid.
I have a power center WFCO 8712 that will convert AC to DC that includes four circuit breakers and four DC fuses it will also charge battery when on shore power.
Any suggestions on how to set this up so I don’t blow myself up or start a fire?
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Old 08-14-2020, 08:56 PM   #5
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Rated Cap: 71 Passenger- 30,000 lbs.
I believe your understanding is on the right track.



Quote:
Originally Posted by Flying Pig View Post
Hope these help!
The best I can tell the D + signal is attached to the ignition circuit for the engine. The high current supply would be to run the refrigerator say off of the battery bank or the alternator in the low current supply would be strictly from battery power when running propane… I just want to make sure I have a good beard on this before I burn a hole in a $1200 refrigerator!

Yes, the attached photos did help.


According to the documentation page, the D+ is indeed used to control the use of the 12V DC high-current input so that the battery is not drained by the refrigerator while the engine is not running. Bear in mind that this would mean the refrigerator is NOT running when the engine is turned off ... unless hooked up to the AC power input or propane ... but the low-current power input is still needed in these cases as well. I could not see where the D+ signal come into the wiring diagram ... which is really a block diagram at best.



One thing to note is that the low-current lead is to run the electronics in ANY/ALL modes. All of the push buttons and switching is powered by the low-current DC input.
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Old 08-14-2020, 09:14 PM   #6
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Thank you everyone for your advice. I just started a different thread where I have a wiring schematic for the whole project. If you’d like to take a look and give me your input it would be greatly appreciated!
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Old 08-14-2020, 09:29 PM   #7
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Engine: Caterpillar 3126E Diesel
Rated Cap: 71 Passenger- 30,000 lbs.
Are you referriing to this thread?


https://www.skoolie.net/forums/f49/t...ase-32550.html
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Old 08-14-2020, 09:36 PM   #8
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Yes! That’s the one
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