diagram of pybyr/ Trevor's proposed plumbing

[pybyr]

For flow-reversing with a valve, I'd look for a simple 4-way valve. Single valve body and a single actuator, and you have flow reversal with a single pump.

It will be more expensive than a pump, so it's of dubious value. ...
Joe

Joe- and/ or others- can someone point me to an example of a specific type of valve referred to by Joe in the text quoted above? And how it's hooked up with the source, circulator, and load to have the one 4-way valve kick the flow into an opposite direction?

my recent looking into/ considering the higher electrical efficiency circulators re-raises the valve question, on account of the fact that the euro-type ECM circs would be substantially more expensive than a "usual" circ.

Still not quite sure on whether I'll go with the dual-circs-in opposite directions or valved-reverse mode, but I would like to fully understand the options before I (very soon) start ordering parts for the hookup

thanks!

 

[termite]

Joe- and/ or others- can someone point me to an example of a specific type of valve referred to by Joe in the text quoted above? And how it's hooked up with the source, circulator, and load to have the one 4-way valve kick the flow into an opposite direction?

Page 2 of this thread has a drawing of what I did on my system.

https://www.hearth.com/econtent/index.php/forums/viewthread/12887/

I just used a SPDT relay to send 24vac to the actuator right and left motion based on the system state. You want to make sure you get a floating actuator to make controlling it simple.

 

[pybyr]

Joe- and/ or others- can someone point me to an example of a specific type of valve referred to by Joe in the text quoted above? And how it's hooked up with the source, circulator, and load to have the one 4-way valve kick the flow into an opposite direction?

Page 2 of this thread has a drawing of what I did on my system.

https://www.hearth.com/econtent/index.php/forums/viewthread/12887/

I just used a SPDT relay to send 24vac to the actuator right and left motion based on the system state. You want to make sure you get a floating actuator to make controlling it simple.

thanks termite!-- can you (or anyone one) please give me more details on make / model of the valve & motor?

thanks

 

[termite]

thanks termite!-- can you (or anyone one) please give me more details on make / model of the valve & motor?

thanks

Valves and actuators are EASB. I would probably go one size bigger than your plumbing for the flow reversal application.

 

[BrownianHeatingTech]

my recent looking into/ considering the higher electrical efficiency circulators re-raises the valve question, on account of the fact that the euro-type ECM circs would be substantially more expensive than a "usual" circ.

ECM really gives benefits when the head is variable (as in systems with zone valves, and such). The savings are much smaller on a tank charging loop, where the piping is so short and there are no valves operating, so the head is pretty much a fixed (low) quantity.

I wouldn't bother with ECM on that sort of application, personally.

Joe