StokerDon wrote:YUP! unless you are having problems, I would leave the continuous blower out of it.
The "coil tunnel" Brian was talking about is an extended flange to mount the DHW coil. It sticks out from the jacket making it easy to check for leaks. This is worth doing if you have the time to take it to a welder. DHW coil leaks are the number one cause of premature boiler death. A side benefit is there are no more broken coil studs to deal with, just nuts and bolts.
lzaharis wrote:I have a KAA-4-1 with the single squirrel cage blower purchased and brought home in October and I am very happy with it and I have no need for the secondary blower as my Intermatic 30 minute timer is set to run with 8 pins at Zero minutes and 9 pins at Fifteen minutes. I have 9 threads on the stokers pusher plate. The KAA-4-1 runs very well at these temperatures with no overshoots or high temperatures approaching a boiler blowoff.
My boiler temps are 120 low 150 high with a fifteen degree differential. I am burning rice coal in my boiler. I Am Very Happy with the controls and the boiler now that the Hydrostat controls have been replaced.
I will caution you to avoid digital controls for it as the factory supplied controls and I would not trust the chinese gauges supplied by them as they malfunctioned on me twice and I have replaced them with Honeywell mechanical controls specifically the Honeywell L8124L1011 horizontal triple aquastat and completely separate B+G Bulldog RB-122-E Low Water Cut Off wired as the primary control before the triple Aquastat to shut the boiler down in the event of a low water condition. The Second Hydrostat 3250 Plus turned off the LWCO function as I was testing the boiler on oil when I replaced the second unit and that killed the idea of using a third Hydrostat 3250 plus for me as well as an integral LWCO function in a triple aquastat.
I have a New Marsh instruments "MArshalltown Triple Gauge to watch over the temperatures and boiler pressure too.
I had the boiler rewired as Keystoker would not supply me with Honeywell replacement unit for the keystoker KAA-4-1 and I am glad I had it rewired as it is much safer to run now with the Honeywell controls "IN MY OPINION".