10 EBD | 10 Inch Round Electronic Static Pressure Bypass Damper | EWC Controls

10 Inch Round Electronic Static Pressure Bypass Damper

Description

of the PS4 Static Pressure Control: The static pressure control is a heavy duty air pressure switch, with a sensitive diaphragm. An integrated SPDT dry switch assembly and a visual ON/OFF indicator are included. The spring adjustable switch has dual scales calibrated in millimeters and inches of water column for easy field setup.

EBD Specifications: PS4 Pressure Switch Set point Range - .1"- 4" W.C. Sensing Element - Reevecote diaphragm. Air Pressure Connectors - ¼"OD brass barbs included x2. Pitot Tubes - Included x2. Pressure Tubing - Included 16’. Power - 24vac @ 3.0va / 1.5w, required to pressure switch. Wiring - Pressure switch is factory wired to damper motor . Contacts - SPDT HD contacts rated for 10amp @ 120vac. Case - Cast Aluminum with ½" conduit opening. PS4 Listings - UL, CUL, CSA, CE, FM Mounting - The PS4 pressure switch is factory mounted to the damper frame or shell. The pressure switch must be oriented so that the adjustment stem is always straight up, regardless of the position of the bypass damper. Refer to pages 3 & 4 for instructions on how to adjust the position of the pressure switch. How the Bypass System Works: As the individual zone dampers open and close, the system static pressure will fluctuate. In order to maintain the design static pressure on the the HVAC duct system during zoned operation, a bypass system with a reliable motorized damper, controlled by a heavy duty pressure sensing switch should be installed. The pressure switch monitors the duct static pressure and energizes the damper motor open or close, to maintain the design static pressure value. The bypass damper will modulate to hold the factory set-point of .5”wc or whatever reasonable set-point the installer chooses. Description of Bypass Dampers: ROUND BYPASS DAMPERS are fabricated from 24 gauge galvanized steel. The rolled shells are furnished with one straight (female) end and one crimped (male) end with stiffening beads for rigidity. Round EBD bypass dampers are equipped with low leakage blade seals.