The temps are above ambient because the complete combustion adds a certain amount of heat to a known lean propane and air mixture. So, now on a hot day, the thermistor indicates 128.4C with an ambient of 44.5C and relative humidity of 23.5% (it's hot today). On the Defender, temps in the flow just after the catalyst are about 85☌ to 90☌ above ambient. What temperature does the sensor read? Or, what is your best estimate of the interior temperature? I agree that the low ΔT might be from too low combustion temperature. I have about 50 photos of the disassembly and rebuild process, but can't seem to upload them on this forum. Any constructive ideas would be appreciated. I have repaired a few of this model in the past, but this is my first complete rebuild. I'm not getting a proper catalytic reaction due to improper air flow/adjustment.
A related problem has to do with the adjustment screw on the nozzle housing. I don't know how many grams of catalytic beads to use, so I put 12g in this one (has to be close). My second issue has to do with the catalytic burner. Low ΔT results in a low voltage production and slow fans. First, I am not getting good heat transfer even after using graphite sheets as a thermal interface material. Of course the propane regulator was replaced with a Goss adjustable model and the propane nozzle is clean.Īfter all of this I have a couple problems. I also sourced a small quantity of the catalytic beads from the manufacturer, so my machine has 12g of new product in it.
MOSQUITO MAGNET PRO 1000MM OWNERS MANAUL SERIES
Today I have a unit operating in my yard that has 2 new fans, 4 new TEG modules wired in series and installed on a heat sink that is flat to +- 0.001 with a surface prep of 20 micro inches.
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