Diesel Furnace Heater System
Provides heat for:
  1. Bus interior
  2. Drivers seat
  3. WVO heating
  4. Hot water

  • valves Manual to start, but hopefully solenoids at some point. WVO valves are two-way (selectors) and interior valves are one-way (on-off)
  • Thermostats (t-stat in diagram) - wired in multiple to turn on Proheat and to open valves when I convert to solenoids.
  • Hot water - I might eventually add a tank with a heat exchanger to store small amounts of hot water (perhaps with a small 120V element) so that I don't have to turn on the furnace to do things like wash a few dishes. Until then I'll just control the hot water manually.
Many suggest using a heat exchanger between the heater and the engine, but since I'm using a selector valve to switch between engine heat vs. proheat then a Proheat coolant leak can only lose the amount of coolant actually in the WVO system, so they are mostly isolated from each other.
2 images
Heater System Diagram The Proheat arrives,
filled with dirt and rust. Uh oh.
I grind rust off the enclosure,.. prep for painting.
Oops. I realize
that the rustoleum I used was not high-heat. I grind it down again.
The base, reground. I cleanup the inside of the cover. And paint.
The rubber feet
(back) were all rotting and decayed. I called ProHeat, and they wanted $50 for 4 replacements. I did some searching and discovered they are called bobbin mounts and are common,.. I measured them
and got a set of exact replacements for a few bucks. Screw you ProHeat!
Newly mounted feet. I find an old balloon-filling tank
which I modify to be a coolant tank.
Prepping the tank
to weld on some new fittings.
Created with the tool album generator a tool by David on Thu Aug 26 03:53:04 2010