You need to give us more info. Do the two fans come on at the same time? I assume the light switch is just that for the jar light, and possibly turns the fans off while you load the unit.....that is just a guess. Not many OWB users on here.
TS
Typically the 3-way switch is going to kill the fans when you turn on the light. The pumps will run all the time and are usually just plugged in to a receptacle that is hot all the time in the back of the stove.
The hot leg from the switch will go through the aquastat before hitting the fans. That's about all there is to a typical OWB. I usually wire in another standard on/off switch ahead of everything so I can kill the whole works if something needs to be repaired.
Can you tell me where to hook up the black from the house? I assume I can wire the house white (yellow in pic) to the pump white (yellow in pic). And of course ground to ground.
thats what i would say
i would put to the black on aqyastat
if u'd like u could call me seven 1 5 four 6 5 02 08
i would say black on aquastat
Have you said what kind of aquastats they are? Example my L6006 - the black goes to R terminal, the R-W makes contact on temp rise (like to turn a circ on) while the R-B breaks (like to turn off a heat source). I don't think R-W-B means Red-Black-Blue, although I'm not sure exactly what they do mean. Try taking the make/model of your aquastats & googling to find the manual for them to help understand their functions. I have no experience with outdoor boilers so can't help much more. Or how about googling the boiler to find a manual?
EDIT: Or just email them and ask:
http://johnsonoutdoorwoodfurnaces.com/Home/home.htm
You might get more help with more info - like maybe make/model of aquastat(s)? And I can't tell from the diagrams how the front one hooks with the rear one - but maybe others can. There is a limit to how much help can be gotten over the internet without the helper actually being there (like in tracing circuits). Think I'm out of this one...
(Pictures might also be a big help too....)