Tjernlund Products SC-1 Speed Control 115V AC 3 A Dial hvac control

HVAC Speed Control for 115V AC Circuits

The Tjernlund Products SC-1 is a dial-operated speed control designed for 115V AC circuits with a maximum input current of 3 A. It features a single silver dial mounted on a steel plate and is compatible with Series PS1503 equipment. The unit provides manual fan-speed adjustment for compatible HVAC installations.

Installers needing simple manual fan regulation

This control suits technicians who require a basic, non-reversible dial to vary motor speed on 115V AC systems up to 3 A. It is not intended for applications that demand automatic temperature sensing, reversible motor operation, or multiple independent switch positions. Buyers needing integrated thermal feedback or reversing capability should look at other devices.

3 A maximum input current at 115V AC

The 3 A rating is the decisive electrical limit; the control must only be used on circuits that stay within this current at 115V AC. Exceeding the rating risks device failure and unsafe operation. Verify the connected motor’s full-load amperage before installation to ensure compatibility.