I finally pulled my ProHeat XL900 out of storage to start hooking it up.
I decided to do a test run, just pumping water in/out of a bucket to see if it heats up.
The unit turns on, but wouldn't fire, I finally realized that the brass elbow coming off the fuel pump had snapped. Shouldn't be hard to replace, but concerning.
I saw the spark going, so that's a good sign, and the water pump started pumping, also a good sign, though the water coming out was nasty - clearly needed a flushing, not a great sign.
Also, I get that there's a "whir" sound for the heater and for the water pump, but there was a louder clacking sound that came on after about 30 seconds of pumping. Is that normal, and what's it from? I'm worried that it's the blower and it's hitting something.
Does anyone have video of the sound of one of these starting up?
So, the two main questions:
1) What is that clacking sound, and is it normal?
2) Is this ProHeat worth saving? I got it from Bruce back in 2010, it showed up pretty dirty, though I managed to clean it up (externally, at least) fairly well:http://bus.getdave.com/Album/Heating/