by starleen2 » Sun Oct 30, 2011 8:16 pm
OK -folks - Time for some talk on Coleman "catalytic" heaters. I have had several (note the emphasis on had). They are really good heaters but the the converter part (the outer Shell) tends to deplete with age or incorrect fuel usage. When they work, they work well - but when the wick dies out - that is when the problems start.
Inside there is a fiberglass type wick that wicks the fuel up to the combustion chamber. When you turn it upside down - the fuel soaks the wick and drops unto the top of the combustion chamber - that is the fuel spot that see. The catalyst in the top works only at a certain temp range, therefore the raw fuel is ignited and permitted to burn. Once it reaches the catalyst stage the fuel is converted to vapor and drawn from the wick to a vapor state and converted to heat by the catalytization of the hydrocarbons - pretty neat huh?
Now the only way to stop the process is to snuff the the catalysis to keep oxygen from igniting the hydrocarbon. this is the reason for the HAD remark. I had disassembled one to raise the wick and clean out the tank - I had snuffed it out - so I thought - and removed the top and the wick. To my surprise - it was not out and continued to produce heat until the entire wick was bone dry! Not even dousing it in water seemed to help much, it just kept on producing heat until all the fuel was gone.
So my word of warning here is that unless you have the snuffer handy - there is really no other way of extinguishing them until the fuel runs out
Last edited by
starleen2 on Sun Oct 30, 2011 9:17 pm, edited 1 time in total.