Understanding Fan Relays & Multiple Speed Motors
By Jim Johnson
In this HVAC training video program, Johnson explains the popular PSC multiple speed motor used in HVAC/R equipment and how relays are used to control their operation. He also uses meters and graphics to explain the wiring of the motor windings and how to test them and the accompanying relays.
LAMA Books, 510-785-1091, 888-452-6244