A door switch makes using your air curtain easy and efficient. By adding a door switch, your air curtain can turn on and off automatically when your door opens and closes.
The commercial, surface mounted reed switch is known for its sleek design. It comes with a 115V controller and adjustable time delay. The time delay will keep your unit running for a configurable period of time, ranging from as little as 6 seconds up to 20 minutes. It can be used for motors up to 1HP. It is for use with Unheated and Hydronic Heated Air Curtains (Non-electric heating) only.
Total Home Supply suggests that a switch is purchased with all air curtains. The J0021 includes 99-050 Relay.