[acjourneyman]

Before draining the loop to try and see if this conversion will work, I thought I would ask. Has anyone changed out an old Siebe to belimo with this kit. I think the clamp is designed to go around the packing nut but want to be sure. Sorry about sideway pics.

 

[control$]

They got the money's worth with 1994 build date! It's goes the packing thread.
The scale was usually 6vdc-9vdc on the yellow/blue wiring on the old strut actuator.

 

[acjourneyman]

You’re exactly right, 6volt start, doesn’t make for smooth control on 0-10.

 

[incontrol]

I recently had problems with that H linkage. I thing some nut/clip was loose so I redid it with threadlock.

 

[Jer]

As eluded to earlier, you need to adjust the controller's voltage span for the new actuator. Is this old B-C valve still being controlled by a MZ II?

 

[acjourneyman]

As eluded to earlier, you need to adjust the controller's voltage span for the new actuator. Is this old B-C valve still being controlled by a MZ II?

Distech now and I did but actuator is 30 years old and needs to be replaced before I get a call on July 4th when it’s a 100 degrees out and I’m 2 sheets to the wind.

 

[JSLLC4Life]

I've done close one hundred of these belimo retrofits, but have basically stopped unless its a chilled water valve on a VAV AHU where precise control isn't all that important and the chiller shuts down in the winter. They are usually the same price as a new valve/actuator assembly. The call backs on old valves leaking through or out of the stem have made it not worth it.

 

[Right Control]

I have used that retrofit kit many time as well. Don't recall any issues. Adjust the controller output and should work fine. That old valve looks like a potential return trip. You did say something about draining the loop. So maybe your changing the whole thing?

 

[acjourneyman]

It’s in the basement and the valves don’t hold, why would they.

 

[MaxBurn]

Because dumping treated water down the drain is money down the drain?

Or is this one of those places that doesn't believe in that sort of thing?

 

[acjourneyman]

Because dumping treated water down the drain is money down the drain?

Or is this one of those places that doesn't believe in that sort of thing?

Treated water, hahaha, that’s a good one.