Posted by Joe (Wa) on June 05, 2010 at 11:15:22 from (66.248.34.111):
In Reply to: Re: RV REFRIGRATOR posted by John T on June 05, 2010 at 05:39:39:
John, Depends on how long and how hot the boiler got. When it is run out of level enough to impede gravity flow, the ammonia & water mixture collect in other areas of the system instead of gravitating back to the boiler.
The liquid mixture level in the boiler drops causing a rise in temp of the remaining solution. The water in the ammonia solution begins to vaporize with the ammonia leaving the boiler and the sodium chomate comes out of solution and is left behind.
Eventually the boiler will go dry or nearly so and the sodium chomate changes state to a sludge that plugs up the perk tube and bakes hard as a rock on the boiler sides and up into the tube.
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