Hog Slat Inc. Newton Grove, NC USA April 2019, REV A3 1 Ventilation Systems HS740 Automatic Curtain Controller (Includes Spanish Version - Incluye versión en español) General Installation Notes: Make sure that power is disconnected from system prior to servicing. Installation of this equipment and related OEM equipment should be in accordance with these instructions, OEM’s installation instructions and local codes (if applicable). Failure to follow specified instructions may cause damage to equipment and/or personal injury or death. Take special note of any Warnings or Safety Decals on the equipment and in manuals. Always wear protective clothing and any applicable Personal Protective Equipment (Safety Glasses and/or Ear Plugs) when working with the equipment. Discarded materials, equipment and boxes should be recycled in accordance with local and national codes. Note: Controller is to be wired in accordance with all applicable local and national electrical wiring codes. All wiring sizes and fuse capacities are to be sized according to applicable electrical code specifications or other regulations. Safety Instructions: Read all safety messages in this manual and on equipment safety decals. Follow recommended precautions and safe operating practices. Ground all electrical equipment for safety. Ground all non-current carrying metal parts to guard against electrical shock. Always keep safety decals in good condition and replace missing or damaged decals. Overview: The HS740 Automatic Curtain Controller is used to control up to two curtain machines or linear actuators in order to regulate the temperature inside a room. The controller will either open or close curtains or vents depending upon requirements from a connected thermostat or control input. Utilizing a built-in 5 minute timer the controller reacts to the thermostat/control input every 5 minutes whether to open or close ventilation. Open and Close times of the curtain machine/actuator are adjustable using the two dial indicators inside the controller cabinet. Operation times are adjustable from 0.6 to 60 seconds.