WGO-3 Circ Pump Piping

Rich Lee

Weil Mclain Technical Service Bulletin SB0206, "Proper Location of the Circulating Pump", shows a diagram of a proper Pumping Away setup. My WGO-3 manual, page 15, shows a 1/2" "N" tapping for connecting the expansion tank, air vent, and fill valve. Should I plug this off and just use the 1 1/2" "C" (supply piping) tapping instead and "Pump Away"?
Thank you.

Rich Lee

John Abbott

The 1/2'' tapping..........

may be used to vent the system by connecting an automatic "hyvent" vent to it or you may plug it off and use an air scoop or spirovent or its functional equivilant on the supply all will work despite what some overzealous wetheads might tell you.The Important thing is that you pump away from the expansion tank/boilerfeed connection.

John Abbott

The 1/2'' tapping..........

may be used to vent the system by connecting an automatic "hyvent" vent to it or you may plug it off and use an air scoop or spirovent or its functional equivilant on the supply all will work despite what some overzealous people might tell you.The Important thing is that you pump away from the expansion tank/boilerfeed connection.

John

David Sutton_3

Hi Rich

Rich, the way i found that works for me is..
on the 1 1/2 put your circ and then up to your surply, on the 1/2 tapping go with a 1/2 x 3 nip then a 1/2 tee then a 1/2 x 1" nip then a 1/2 x 1/8 coupling then a air vent, off the tee go with a 1/2 x 5 nip then a tee then a 1/2 x 12" nip 1/2 90 the hang the extrol... off the tee build up your feeder then back flow the to your surplt from the cold water, hope you can follow this...David

George_11

The tapping at the top of the boiler

> Weil Mclain Technical Service Bulletin SB0206,

> "Proper Location of the Circulating Pump", shows

> a diagram of a proper Pumping Away setup. My

> WGO-3 manual, page 15, shows a 1/2" "N" tapping

> for connecting the expansion tank, air vent, and

> fill valve. Should I plug this off and just use

> the 1 1/2" "C" (supply piping) tapping instead

> and "Pump Away"? Thank you.

>

> Rich Lee

George_11

The tapping you are referring to is part of the feature of

the boiler the directs trapped air at the top of the boiler to either an air vent--if you use a captive air tank, or if you use a steel tank to redirect air absorded into the water during an extended off-cycle back into the tank. Do not plug this fitting, as you will get an air pocket where one should not be. Do not install an automatic bleeder here if you use a steel tank.
Mike