Saginomiya condenser fan speed controller

[CraigF]

Hi all! I've recently been working on a fairly old air Weatherite air handler. The unit has a Saginomiya condenser fan speed controller on the unit. The unit only has two wires connected inside and earth. I cant seem to find any literature on the controller (probs cos its so old!) it is a
L1A4?? Anyone have any idea on how the unit controls speed??

Thanks in advance

Craig

[HVACRsaurus]

Is this similar?

http://www.indubel.com.ar/pdf/biblio...03a5d630eba717

[CraigF]

That looks like an updated version! This one I have is well old, im gathering that this just regulates the voltage fed to the motor unit?

Cheers!

[monkey spanners]

Yeah it aims to keep a reasonably constant head pressure by speeding up or slowing down the fan. Much better than the alco ones imo!

[goshen]

Hi
hope this is usefull
http://www.danfoss.com/Products/Cate...5517f8736.html
http://www.google.co.il/url?sa=t&rct...vM1BFrqdSJ6NeQ
http://www.google.co.il/url?sa=t&rct...ggUvYAwUkgXSNg
good luck