setting vaporstat cut in/cut out

Garret

I'm about ready to fire up the new boiler for the coming heating season...

This is two pipe steam, small vapor system... new Peerless 61 boiler. More details and pics here...


http://forums.invision.net/Thread.cfm?CFApp=2&&Message_ID=261364

I'm working through the lost art, looking at Dan's instructions on calculating the pressure drop in the system.... Can someone check my math to see if I'm doing this correctly?

The supply piping for my furthest radiator is 60ft. So at 1 oz/100ft, and doubling the longest run to allow for fittings, etc.... I get 1.2 oz of pressure drop.

Doubling that, I get a cut in pressure of 2.4 oz.

Seems very low, but maybe worth a shot... I can always raise it a touch if the furthest rad doesn't heat.

Now, how do I get the cut out pressure?

Thanks!
-Garret

Garret

bump

gerry gill

set your vaporstat

for about 3 ounces cut out and 2 differential..see if all heats well..we generally use a trial & error method based upon experiance..

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