Posted by jeffcat on October 21, 2017 at 20:45:17 from (50.207.7.238):
In Reply to: Robert Shaw gas valve. posted by Fixerupper on October 21, 2017 at 12:51:33:
Hold on,,,, I went and looked at some of the Robert Shaw controls in our shop. What you bought is not like anything we have. First off that black knob with high low on it is adjusting the pressure diaphram that really should be set with a folded manometer to a certian water columb pressure. It makes it so the valve will allow a certian amount of gas in. Hi/lo flame. The two wires would need to be hooked together. Your thermal couple would supply the tiny amount of power to keep the valve open. Make and break ,on off, heat no heat deal, thermostat would hook to the black block. These valves are usually set up for milli volt and some are even micro volt. They also come in 24 volt AC supply and there are 120volt types. This is the trouble with fixing "home" appliances, and commercial equipment. Some of the ovens we have in the kitchens have 1 1/4" gas lines going to them. NOW. NOW!!!! Looking at your photo very carefully....that red cover, if you look inside of it there should be a threaded hole. That is where your thermal couple should screw in. At the bottom of that hole is a blue plastic block with some squished wire. Those two wires would go to a hi limit, and your thermostat would hook to the screws on the black block. Hope this is makeing sence. The valve in the first photo is for a Pitco fryer. Very common valve in our industry. Ours doesn't have that red cap but that is where the thermal couple screws in. For goodness sakes don't cross thread it! Also it is only a few foot inches of tightness. To me this is so simple but trying to explain it on a forum! Ufda. Let me put up the photos and if you have problems get back to me.
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