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General Discussion of preventative/corrective maintenance and other technical issues regarding your coach that are not covered in other Mechanic's Corner categories (ex. refrigerators, water heaters, and compressors).

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  #11  
Old 06-24-2019
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gcyeaw gcyeaw is offline
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See page 48 of this document for a general LP system diagram. Note part 1(at the tank) is a high pressure regulator and part 14 (in the refer compartment) is low pressure regulator.

https://www.wanderlodgeownersgroup.c...20Schreurs.pdf

Since the line from the tank to the refer compartment is 3/8 it is too small to supply all of the appliances at low pressure. That is why it is fed with high pressure and then distributed after the low pressure regulator.
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  #12  
Old 06-24-2019
Docneon Docneon is offline
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Quote:
Originally Posted by badandy View Post
You should have 2 regulators, not 3 - they would put a medium pressure reg on the tank, then get it down to lower pressure by the fridge. If you put a low pressure one on your LP tank then the other regulator by the fridge probably can't do its job. Did you put a two-stage on the LP tank? If so you can remove/bypass the regulator behind the fridge.
This is exactly what I did. I replaced the high pressure with a low pressure regulator I reviewed the diagram this AM right around the time you replied.

The third regulator is not on the diagram but is definitely BB Factory. It is a 2nd low pressure for an outside stove/grill.

When we get to our next stop, I’ll replace the high pressure regulator and swap out the low pressure regulator behind the fridge.

Thanks!
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  #13  
Old 06-24-2019
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Ah yes the grill regulator, I forgot about that one. Things advanced a lot between 83 and 85!
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  #14  
Old 06-24-2019
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Here is a chart (first one) showing that the 3/8 copper line from the tank to the refer compartment could only handle 49k BTU at low pressure. (assume it is about 10 feet long from tank to refer compartment) The sum of the appliances is nearer 87k BTU which would require a 1/2 inch pipe. So the system needs the high pressure reg at the tank feeding the low pressure reg in the refer compartment.

https://www.lp-gasequipment.com/prod...0_p157-175.pdf
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  #15  
Old 06-24-2019
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I think mine has a 1/2" tube from the tank to the fridge?
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  #16  
Old 06-24-2019
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Quote:
Originally Posted by badandy View Post
I think mine has a 1/2" tube from the tank to the fridge?
That would be good. I just want folks to investigate before fooling with Propane
system mods. You, I know, do your homework.
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  #17  
Old 07-03-2019
Docneon Docneon is offline
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Thought I had posted a follow up, but service was spotty and I guess it didn’t take.

Anyway, after reinstalling the HP regulator and swapping out the LP regulator behind the fridge, I was able to run both furnaces. Thanks!

And to your point Gardner, yes safety is key. Fatal flaw here is not recognizing a HP regulator. I do exercise great caution when working with propane and other flammable fuels and always use yellow thread tape to secure the fittings that require it.
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  #18  
Old 07-03-2019
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Quote:
Originally Posted by Docneon View Post
Thought I had posted a follow up, but service was spotty and I guess it didn’t take.

Anyway, after reinstalling the HP regulator and swapping out the LP regulator behind the fridge, I was able to run both furnaces. Thanks!

And to your point Gardner, yes safety is key. Fatal flaw here is not recognizing a HP regulator. I do exercise great caution when working with propane and other flammable fuels and always use yellow thread tape to secure the fittings that require it.
Most folks don't know about the yellow thread tape for gas. The white tape flakes and wreaks havoc with the regulators and orifices.
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  #19  
Old 07-03-2019
chiplamb chiplamb is offline
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I use the yellow tape for everything! White tape is junk!
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  #20  
Old 07-03-2019
badandy badandy is offline
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All tape is junk unless it's duct tape.
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