I have a Hydro-Air HA 430 single phase 1hp motor and would like to change it to 2 speed,
is there a way to run it at a slower speed as i need to run it as a circulation pump but when i flick a switch it comes on to full power.

How do i go about doing this?

Specs

Motor

Ip-X5 220/240v 50-hz AC-1

Amps 5.2 Watts 1000

H(max) 16 m3/h 23

Capacitor

WB40200 MK SH

20uf +- 5% PO

AC400v B
AC450v C

40/085/21

50=60Hz

Any advice appreciated.

Pegitt