On Thu, 22 Nov 2007 03:44:20 -0000, Big Giant Head
wrote:

Hey as long as we are on the topic of gas valves. Is there an adjustment
for main gas flow under the silver screw on this one? Elsewhere?

http://farm3.static.flickr.com/2403/...631323b0cb.jpg

I put this in several years ago. The OEM part was NLA; this was the
recommended replacement (which surprised me a little since the body size
was different so I had to use a different nipple on the left and relocate
the pilot line a little as well). Works fine but early on I had a few
trips of the heat sensor attached to the draft diverter. Never had that
happen before but then someone pointed out that they thought the flame size
was a little bigger than in the past.

I throttled back the gas at the shuttoff and figured I'd check into further
adjustments at the gas valve. I got lazy and just left it and it's been
working just fine ever since. But of course that's not exactly right.
Figured I'd ask before looking myself as someone will know.


The adjustment on the valve I am familiar with is for the size of the
pilot flame. You can eyeball the flame to adjust to your idea for
the best flame.. The valve I have is a Honeywell V800A1161, slightly
different from yours. Right next to the pilot light knob is a screw
with the words "Pilot Flow Adj" screw molded into the alloy body.

In the valve installation manual there is a "Pressure Regulator
Adjustment" beneath cover screw (illustration). My furnace works
fine. I am not about to fiddle with this adjustment. I believe if
your furnace works leave it alone.

The other adjustment is the air restrictor orifice on the burner tube
to adjust the air/gas mix ratio. The flame should be a clean blue
flame.