I was talking to one of the field app reps at Taco yesterday about my 0014 VDT. Told him it did not work as a primary pump for my boiler. I had previously talked to one of the tech guys BEFORE I bought the pump, and they assured me the Delta T pump would work in sort of a reverse mode to keep the Delta T on the boiler output at whatever I wanted. Well, it didn't work that way. So I asked the rep yesterday if there was a way to configure the VDT pump to work just as a Setpoint pump. He called back a little while later and said yes, the new, and quite expensive, setpoint pumps use the same board as the VDT's. By changing the dip switch settings and just using one sensor instead of two, the VDT pump can be run just as a Setpoint circulator. In other words, you can set it for any boiler output (supply) temp you want and it will speed up or slow down to maintain the setpoint temp. Anytime the outlet water temp exceeds the setpoint temp the pump would run full speed.
Now, I haven't tried my 0014 yet in this mode of operation, but I probably will within the next 2 weeks or so, and we'll see if its true or not.
It seems to me that this would be the absolute ideal pump for guys who have storage. To be able to just send 180F-195F water ONLY to your tank during the entire burn cycle would be fantastic and improve efficiency.
The VDT pumps run about $200-$300 less than the VS pumps, so quite a difference in price to do basically the same thing.... if its actually doable ?
Pat
Now, I haven't tried my 0014 yet in this mode of operation, but I probably will within the next 2 weeks or so, and we'll see if its true or not.
It seems to me that this would be the absolute ideal pump for guys who have storage. To be able to just send 180F-195F water ONLY to your tank during the entire burn cycle would be fantastic and improve efficiency.
The VDT pumps run about $200-$300 less than the VS pumps, so quite a difference in price to do basically the same thing.... if its actually doable ?
Pat