Using a 3-speed circ as an injection circ?

Rocky_3

done it multiple times. By dialing in your injection rate with the appropriate speed, you can actaully improve the "rangeability" of your injections system.

Rocky

Mike Lampkin_2

Using a 3-speed circ as an injection circ?

Is it possible to use a multi-speed circ such as a 3-speed Grundfos ups15-58 or a Taco 00R-IFC as an injection circ rather than using a standard single speed circ?

Home Depot Employee

Absolutely,

Poor mans injection pump (can only dial it in close, not adjust for system & demand changes and bangs on and off versus variable)

Terry Trommeshauser

you can still hook up these pumps to a mix control to vary the speed accordingly on supply/demand temps
such as tekmar T356, etc.
we've done this with great results.

the 3 speed selection as per above does narrow the "range" nicely.

Rocky_3

Yes, still hooked to VSI control

Did not mean to imply above that you did not have it connected to a VSI control of some kind. Without the VSI control, well, lets just say there is absolutely NO rangeability.
Rocky

Mike Lampkin_2

Thanks everyone..

Yes I'll be hooking it up to a Tekmar control.Thanks for the info.If you are carrying a 3-speed in your truck,it could also get you out of a bind if a vsi circ goes down and you don't have a replacement.

JohnNY

Wait a second...

The responses here suggest this is a good idea.

Wouldn't the speed selection (other than "high") limit the high-speed range, thereby limiting the functions of the VSI controller?

Why would you willingly do that?





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Mike Lampkin_2

Whose Circ?

Hi Rocky,
Do you remeber if it was a 3-speed Taco that you used? I got a call from Grundfos today and they told me not to use the UPS 15-58.Apparently you can't use it because of the way it is internally wired.