WebA: All make-up air units can have a VFD added. The direct fired units require a burner by-pass damper to keep the air velocity constant across the burner at all times. This option is selectable in 3.10 CAPS. Airflow turndown can be down to 50% and greater on some units depending on the start point on the fan curve. WebMar 9, 2024 · A variable geometry nozzle maintains a high-discharge velocity in a variable volume laboratory application without passing air through the bypass air damper. …
Face and Bypass Control Dampers Greenheck
WebGreenheck Coils recommends the use of a properly sized liquid line filter-drier, installed upstream from the expansion valve and as close to the evaporator coil as possible. Filter … WebThe system controls fan speed and/or bypass damper to maintain duct static pressure set point. • Variable frequency drive (VFD) modulate fan speed. • With the fan at minimum speed, the damper will open. • The damper closes before the fan speeds up. Multi-fan System Operation (Field adjustable within PLC) • Operate N+1 or N-1 redundancy liter per minute to gallon per hour
Make-Up Air FAQs Greenheck
WebHorizontal style face and bypass control dampers are used in applications where face and bypass dampers are needed along side each other. The units are connected causing one damper to open and the other damper to close. The FBH-43 is a horizontal style face and bypass low leakage damper. This model is intended for application in medium to WebJul 27, 2024 · The bypass air plenum is positioned below an inline fan or adjacent to a scroll-style centrifugal fume exhaust fan. It contains an isolation damper to disconnect the fan from the duct system when the … WebHVAC Zone Dampers Dampers physically open and close to regulate room temperatures in an HVAC system. They come in a variety of shapes and designs to work in any system. Honeywell Automatic Round Dampers … liter of wine a day