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Say Dave Yates...Paul P
Paul Pollets
Member Posts: 3,661
Say Dave, I spoke with **** Anderson, Seattle's chief plumbing inspector, this AM to clarify water heater usage in this city. He said the use of open systems is permitted providing the hot water heater has a thermostic mixing valve on the potable side, if the unit is to be fired over 120; and a timer on the "non-potable" side to circulate the water at least 1x per day. Since the heating pump is powered by a thermostat, how will the pump timer overide the thermostat relay??
He also mentioned the Seattle Boiler Dept. handed over this "sticky wicket", to the Plbg Dept, rather than define the code furtheror get embroiled in controversy. Heat exchangers are not required to separate potable from non-potable, even though the UMC seems to infer that they do. I suspect someone will have to get sick before this issue is resolved. We don't promote or install combined systems without use of coils(CombiCor) or HX's. Don't want the long term liability.
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He also mentioned the Seattle Boiler Dept. handed over this "sticky wicket", to the Plbg Dept, rather than define the code furtheror get embroiled in controversy. Heat exchangers are not required to separate potable from non-potable, even though the UMC seems to infer that they do. I suspect someone will have to get sick before this issue is resolved. We don't promote or install combined systems without use of coils(CombiCor) or HX's. Don't want the long term liability.
<A HREF="http://www.heatinghelp.com/getListed.cfm?id=104&Step=30">To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"</A>
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Comments
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AS Forrest would say...
stupid is as stupid does. Funny thing is, all of the model plumbing codes have amendments about to be passed requiring a minimum of 140 F storage and (I believe) ASSE 1017 protection at the outlet. Why? Because the health concious code officials involved are concerned about Legionella.
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Wired in Parrallel
The timer is wired to the pump side of the relay, then the relay or the timer can power the pump. It won't matter if one or the other or both are running the pump it just needs 120vac.
Art0 -
And...
who will know when the pump fails? When will they know? Or have they found a pump that never fails? Will the pumps survive terrorist attacks?
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