Hog Slat Inc. Newton Grove, NC USA March 2019 , REV A5 1 Ventilation Systems HS653 Negative Pressure Ventilation Controller (Spanish Version Included/ Versión en Español Incluida) 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: Negative pressure ventilation 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 Hog Slat Negative Pressure Ventilation Controller utilizes a Photohelic ® Pressure Switch and gage combination measuring the differential pressure of two monitoring tubes. The gage incorporates an easy to read display and easily adjustable High and Low pressure set point indicators by two control knobs on the front of the unit. The make/break dead band range is the width of a pointer which is sufficient to prevent short cycling operation. The controller is designed to open and close vents as required to maintain house static pressure within the defined range set by the two high and low limit pointers. The controller has onboard relays for direct connection to vent machines to open and close vents in order to regulate the pressure inside the room. Front panel switches provide local control to manually open and close vents.