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Date:         Wed, 9 Sep 2009 19:19:13 -0500
Reply-To:     Alan Felder <dieseldoofus@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Alan Felder <dieseldoofus@GMAIL.COM>
Subject:      Fwd: Dometic RM182B orifice
In-Reply-To:  <3d35438b0909091716p13c66ac0ub4815f1944e60e87@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

How come when I reply it doesn't go back to the group? I forgot to "reply all" so am forwarding to the group now.

---------- Forwarded message ---------- From: Alan Felder <dieseldoofus@gmail.com> Date: Wed, Sep 9, 2009 at 7:16 PM Subject: Re: Dometic RM182B orifice To: David Beierl <dbeierl@attglobal.net>

Woops! RM182A, or at least that's whats on the door. Does have round boiler case tho. I would also be surprised if it had anything else in it as well. I used a cheap 25x pocket microscope from HF (I think), and used daylight. It is a dinky hole. It took 45 minutes of holding the safety override down to get gas from the tank thru the jet, after I installed it. Starts great now. In fact, I'm concerned that the flame is too hot or somehting. I don't have any experience with these so I have no benchmark. I am running it again tonight, this time for two hours. I think maybe the thermostat sensor is not in contact with the evaporator fins inside, but how much prob that is time will tell. It is definately cooling. I learned tonight that you don't want to grab the exhaust vent thru the side vent opening.

On Wed, Sep 9, 2009 at 6:49 PM, David Beierl <dbeierl@attglobal.net> wrote:

> At 07:19 PM 9/9/2009, Alan Felder wrote: > >> Anyone familiar enough with these brass fittings to say if the hole is >> just >> a hole, or is it supposed to have some quartz fitting inside the hole? >> Dometic no. 24 jet. >> > > I'd be pretty surprised if it did, in fact I can say categorically not. > I've looked at them under 40x and it's a pretty small hole but I've seen no > sign of a ruby or anything else there. I have some jewelers-size welding > tips of which the smallest is ruby. It's no tiny piece, the orifice is > pierced in it and that's that. Must be 1/16" across. The stuff's cheap, > wouldn't be worth their manufacturing effort to put the absolute minimum > possible size in it. > > Somewhere I read that the jets have some very small >> insert of quartz or something, which would make the flame smaller I >> suppose. >> > > Actually a smaller hole would make it leaner. If you cut air and gas down > proportionally it would be smaller but keep the same mixture. > > A tip if it doesn't like to run at high altitude -- turn the gas pressure > up a couple of inches W.C. Dometic used to have a high-altitude jet, but no > longer. > > I have looked at mine with a microscope and don't see how there >> > > Just for interest, what sort of scope and illumination? > > Yours, > David > >

-- Alan Felder Austin TX 82 Diesel Westy

-- Alan Felder Austin TX 82 Diesel Westy


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