I believe the same BN-4 Eberspracher (guessing at that spelling)  was 
used in the Things and Buses.  The 181 Registry has reprints of the 
manual available.  email at <Vwtype181@aol.com>.  Don't have a phone 
number handy.

good luck
bill killian

On Mon, 25 Sep 1995, Joseph F. Fournier II wrote:

> Hey, where can I get documentation on the gas heater in my '71 bus? I'd
> like to go through mine before really cold weather sets in, but it didn't
> sound like there were any really good places to have work done. When I
> bought the bus, the PO said the heater worked. She also told me lots of
> things I've found to be true from her perspective and false from mine. 
> I'm reluctant to fire up the heater until I know more about how it works. 
> I'd rather be cold in a bus than warm by a charbroiled breadloaf. Any
> pointers toward info will be appreciated. 
> 
> Thanks! Joe
>