Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

How is the capacitor connected in a Grundfos circulator?

Nevin_2
Nevin_2 Member Posts: 7
in THE MAIN WALL
I got a used furnace with the circulator in a box:
Grundfos Model 8620 3-speed.

The capacitor leads are hanging loose.
How should they be connected?

Are they polarized?

What is the large screw on the motor end?

There is a circulator photo here--->
http://www.gardengrapevine.com/FurnaceOutdoor.html

Comments

  • Duncan_2
    Duncan_2 Member Posts: 174
    Circulator in a furnace?

    Oh, you mean boiler...

    Like hot rod said, you have a Grundfos model UPS 15-42F three speed circulator.

    Typically, there's screw-in or push-in terminals for the line voltage and neutral supply voltages and ground.

    The capacitor is usually connected to leads in a sealed molded rubber block, at least in the newer ones. Can't remember the 1986 models. It's an AC capacitor, not polarized, but needs to be connected correctly to the motor windings.

    The large screw on the end is to access the end of the motor rotor shaft. It could spray you with water if removed while the pump is under pressure, but most likely would dribble.
This discussion has been closed.

Categories