Thanks very much for explaining David.

Really couldn't see why burner needed to be on, but now I do.

In measuring the pressure, I was very careful to close the main valve
then remove manometer inlet hose to vent it each time I adjusted the
diaphragm. I also did this 3x in a row to confirm the 5.25" rise I
saw. So in effect I was doing the same thing as having a flame
burning. Seems I actually have 10.5" W.C.

Neil.

On Sat, Aug 14, 2010 at 1:52 PM, David Beierl <dbeierl@attglobal.net> wrote:
> At 04:28 PM 8/14/2010 Saturday, neil n wrote:
>>
>> - I've seen conflicting answers on this: is it absolutely necessary to
>> have a stove burner on (or both?) when testing pressure? If so, why?
>
> You have to be venting/consuming low-pressure gas in some fashion, otherwise
> the pressure in the line won't go down when you adjust down. �But you can't
> leave the output wide open either, 'cause the pressure will go to zero.
>
>
>> - Does the main valve need to be closed, and inlet end of manometer
>> hose disconnected and cleared of pressure each time an adjustment is
>> made? Or does hose remain connected, and valve remain open while
>> diaphram is being adjusted? (i.e. one would see pressure rise or fall
>> while all connected and diaphram adjusted)
>
> See above.
>
>
>> - Though the stove still lit, my LP tank was almost empty at time of
>> testing. Would this have affected the accuracy of the manometer
>> reading?
>
> Should not.
>
> d
>

-- 
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines