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Old 09-11-2015, 12:52 PM   #29
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Greetings,
We are presently dry camping at Jacob Lake AZ, altitude aprox 8k. Our fridge is not working on propane, we are here for a week with a fridge full of food and now we have to keep it very short thank's to Dometic outdated technology and Airstream non existent and inexcusable lake of quality control. it is obvious that they are manufacturing these TT to be used around your backyard and around metropolitan areas only. Our thermo coupler is trying to ignite and the flame dies out immediately with a thud. We just called Dometic tek support, explained the problem to them and to our surprise we where told that our brand new unit fridge (2014,28Intl Signature) will not work on propane at an altituded over 5500ft. I said to them what??? Wtf... so there we go...
Adjust the LPG pressure to 13 inches of water column.

All you need is a ruler and a clear small plastic hose, in order to make the gauge.

You might be surprised how easy that is.

Airstream has nothing to do with the design of out sourced appliances.

Airstream has always strived to make the majority happy, not the minority. Using a reefer on LPG at high altitudes is an absolute minority.

Andy
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Old 09-11-2015, 01:31 PM   #30
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The proper store bought gauge isn't that expensive and a lot easier.

Series LPTK | Gas Pressure Test Kit | Dwyer Instruments
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Old 09-11-2015, 02:00 PM   #31
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The proper store bought gauge isn't that expensive and a lot easier.

Series LPTK | Gas Pressure Test Kit | Dwyer Instruments
I agree, but that kind of store most likely is not at high altitudes.

The gauge can be made using 3 feet of small ID clear plastic tubing.

Bend it into a number 2 shape. Make sure the center part and outside part iabout 15 inches high. Add water to the hose that fills 15 inches of the hose

Hook the short end up to the LPG line. Measure the heighth of the water in the end opposite the LPG hookup

The water will rise in that far end. Adjust the LPG regulator so that you measure 13 inches.

Sorry, I am in Hawaii and cannot post a photo until I get back.

Simple gauge that costs next to nothing. Everyonr should have one, if for no other reason than to check their own trailer.

Andy
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Old 09-11-2015, 04:27 PM   #32
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I am still elk hunting with nothing on the game pole but home for the weekend.
I will adjust the regulator to 13 when I can track down the propane repair guy and borrow the gage. My old regulator was adjusted for that level but it went out. New regulators are set at 11.
Meanwhile I am getting by. Fridge is checking out only occasionally.
Here are a couple of tips for high altitude users. I set a camp chair in front of the fridge vent to break the wind which blows out the flame.
I have the setting on the coldest. Fridge seems to light better when it is not stone cold and cycles on more frequently.
If the fridge won't work at all on propane it needs servicing, i.e., burner and flue cleaning.
When it goes "click poof, click poof" in the middle of the night, I turn over on my deaf ear. My wife has excellent hearing and is not so lucky.
Memo to Airstream, Andy and Dometic, there are hundreds of thousands r.v.'s running around over 5,500 feet. If products don't work they are defective and in our great country, lawyers get rich bringing class actions.
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Old 09-11-2015, 04:45 PM   #33
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I am still elk hunting with nothing on the game pole but home for the weekend.
I will adjust the regulator to 13 when I can track down the propane repair guy and borrow the gage. My old regulator was adjusted for that level but it went out. New regulators are set at 11.
Meanwhile I am getting by. Fridge is checking out only occasionally.
Here are a couple of tips for high altitude users. I set a camp chair in front of the fridge vent to break the wind which blows out the flame.
I have the setting on the coldest. Fridge seems to light better when it is not stone cold and cycles on more frequently.
If the fridge won't work at all on propane it needs servicing, i.e., burner and flue cleaning.
When it goes "click poof, click poof" in the middle of the night, I turn over on my deaf ear. My wife has excellent hearing and is not so lucky.
Memo to Airstream, Andy and Dometic, there are hundreds of thousands r.v.'s running around over 5,500 feet. If products don't work they are defective and in our great country, lawyers get rich bringing class actions.
Dometic or Airstream do not have anything to do with the LP regulators.

What is the LPG pressure in your coach?

Check it, as it quite might be lower than it should be.

It should be 11 to 13 iches of water.

The closer to the 13 inch pressure the better the high altitude operation will be.

Andy

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Old 09-11-2015, 08:39 PM   #34
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I should measure the pressure on our regulator. We currently live at 8,000 feet and everything gas works ok.
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Old 09-11-2015, 09:52 PM   #35
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Dry camping for several weeks now at 7000 ft in Arizona, freezer is below zero and freezer near freezing. New Dometic fridge from 2007. I've used propane burners at 10,000 ft in CO and can't remember having decreased performance.
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Old 09-12-2015, 05:44 AM   #36
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Jacking up the propane can only do so much. At 9000 ft altitude there is 25% less oxygen available for combustion.
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Old 09-12-2015, 08:06 AM   #37
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Really, ANDY..I've been called many things in my lifetime, but this is the first being called a "minority". Most the state of Colorado, where I live, is above 5500 feet. All the places I dry camp are above 5500. Everybody I know in Colorado, Utah, & New Mexico is above 5500 feet. There is absolutely no doubt in my mind that a "fix" could be manufactured for fridges that spend their life above 5500 feet.

I've had camp trailers for years, and never had a problem with propane appliances until the new model of appliances. Would you explain to me how 50 years of working correctly has now become "does not work above 5500 feet" and that NOT being a problem with the manufacturers? Not everyone camping is doing so in Florida or California.
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Old 09-12-2015, 08:19 AM   #38
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We live at 8400 and have never had adjustment issues with propane pressure per se, neither on our rig nor on other rigs here at the park. When pressure is an issue, it's simply a dead regulator, not one that needs adjustment.

That said, we have often enough seen mixture adjustment issues on various brands of RV refrigerators. (And on the MGB!!) Easily dealt with.


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Old 09-12-2015, 08:21 AM   #39
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Jacking up the propane can only do so much. At 9000 ft altitude there is 25% less oxygen available for combustion.

Sort of ...
More clarification ...
http://www.altitude.org/air_pressure.php
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Old 09-12-2015, 09:10 AM   #40
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I forgot to mention one other tip for getting the fridge to light.
I leave it on gas all the time. Many of my check outs come after the fridge switches from a.c. to gas after a generator session. Perhaps there is low pressure in the propane line with use from another appliance.
Sometimes when first lighting a very cold fridge, an a.c. session is necessary to warm it up before it will light at all.
I have a dual voltage d.c. and a.c. fridge in my boat. It works well but would require more battery power to run than my 2 group 27's. After a very cold night, the furnace has used up a lot of juice. If my Dometic burns up again, I will go with an all electric replacement and upgrade batteries.
All electric r.v. refrigerators are probably the coming thing. Propane fridges are phasing out for a good reason as Dometic doesn't make a very good product.
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Old 09-12-2015, 10:26 AM   #41
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Altitude.org | Altitude air pressure calculator
Sorry. I meant to say at 9000 ft there is 27% less oxygen than at sea level.
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Old 09-12-2015, 12:59 PM   #42
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Adjust the LPG pressure to 13 inches of water column.

All you need is a ruler and a clear small plastic hose, in order to make the gauge.

You might be surprised how easy that is.

Airstream has nothing to do with the design of out sourced appliances.

Airstream has always strived to make the majority happy, not the minority. Using a reefer on LPG at high altitudes is an absolute minority.

Andy
Airstream can give specs to Dometic for what they want and to any supplier. Additionally, Dometic could easily provide an adapter kit. This minority is not all that small. Also, it is responsability of Aistream to have the higest quality control and requirements from third part manufacturers and test their equipment in all type of enviroments before releasing their products to the market. When it comes to propane fixes, I strongly believe that owners should not be messing around with propane lines, regulator fixes and so on.
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