Each newsletter we aim to add details on commonly asked technical questions. This post we are looking at how to control air to air heat exchangers in a basic format. If the requirement is for the HEX to operate when an indoor unit was turned on, then this is controlled by using the RBC-SMFI accessory. External switches can be used to operate fan speed and damper.
Wiring Example :
Connecting to Heat Exchanger:
Toshiba RBC-SMFI Connection
To Indoor Unit :
Toshiba RBC-SMFI Connecting to indoor