coolmccool 
New Member
Posts:15
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| 01 Oct 2008 04:12 PM |
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I am helping install a new Comfort-Aire GeoMax 2, 3 ton, open discharge system. This is new for the heating contractor too, so I am being a guinea pig and know it. His supplier sent two Taco valves which is fine, but also 2 hays 4gpm water controls. Don't I need a 4.5 for the first stage and a 1.5 for the second stage making 6 total? Why can't I just use ball valves, which could actually be adjusted to fine tune the system once it is operating? Thanks in advance, I'm sure I'll have more questions. |
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engineer
Veteran Member
Posts:2749
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| 01 Oct 2008 04:15 PM |
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Can go as low as 1.5 GPM per ton if open loop water > 50 degrees. Waterfurnace does not recommend dual valves for 2 stage, FWIW.
I don't think ball valves are intended to be partially opened to regulate flow - might be ok at fairly low pressures. |
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Curt Kinder <br><br>
The truth is incontrovertible. Malice may attack it, ignorance may deride it, but in the end, there it is - Winston Churchill <br><br><a href="http://www.greenersolutionsair.com">www.greenersolutionsair.com</a>
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Geothermalman
New Member
Posts:58
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| 01 Oct 2008 04:26 PM |
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Homeowners like to play with valves. Keep temp and pressure gauges off the system too. Use pt ports. |
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Palace Geothermal
Veteran Member
Posts:1609
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| 01 Oct 2008 04:42 PM |
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On an open system, you need to have a valve on the discharge side to keep water in the heat pump when the flow pump shuts off. This helps to reduce scaling.
2 gpm per ton is minimum flow, if you are a little over it is not a big deal.
So you need a flow controller on the inlet and a valve on the outlet. |
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Dewayne Dean
<br>www.PalaceGeothermal.com<br>Why settle for 90% when you can have 400%<br>We heat and cool with dirt!<br>visit- http://welserver.com/WEL0114/- to see my system |
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