Table of Contents
How do you set a barometric bypass damper?
Slowly move the weight toward the shaft in half-inch increments until the bypass damper starts to open slightly. Then move the weight in the opposite direction about half an inch, or until the damper just barely stays closed. 3. Close one or more zones and the bypass damper should open.
How do you size a bypass damper?
Size the bypass damper by subtracting the cfm of the smallest zone from the cfm of the system.
What does a bypass damper do?
The Bypass Damper is a pressure relief valve placed between the supply and return ducts of the forced air duct work. As Zone dampers start closing, the bypass damper will open and divert some of the supply air to the return.
Where should a bypass damper be located?
The bypass damper may be mounted in any of the 4 positions with airflow up, down, right, or left with the air flowing in the direction of the “airflow” arrow. However, when positioned horizontal (airflow left or right), it must be mounted with the shaft above center.
What is a disadvantage of using an air bypass system to relieve duct pressure?
An area used for dumping excess air and capacity when only one zone is calling. What is the disadvantage of air bypass? Evaporators can freeze and furnaces can trip on high limit.
What’s the disadvantage of air bypass?
What is the disadvantage of air bypass? Evaporators can freeze and furnaces can trip on high limit. What is the purpose of the bypass damper used in many zone systems? To recirculate air that is not being used by the active zones.
What is a barametric by-pass damper?
This barametric by-pass damper is a single blade, counter balanced weighted damper that operates on air pressure in order to control the flow of by-pass air. The SPRD has an adjustable arm and weight to maintain the correct amount of pressure in the duct system.
How do I adjust the static pressure on my SBD bypass damper?
Click here for the SBD Sales Brochure. The model CLBD Bypass Damper is an easy and economical way to manage system static pressure, in a zoned HVAC system. Damper adjustment is easily achieved by increasing or decreasing the force applied to the bypass damper blade, until the desired static pressure is achieved.
What is a CPRD damper?
The TrueZONE®Bypass constant pressure regulating damper (CPRD) is a round static pressure relief damper. It is used in forced-air bypass applications to relieve excess static pressure when some of the zone dampers are closed.
What is a static pressure regulating damper?
The Static Pressure Regulating Damper, Model SPRD, is a single blade, counter balanced weighted damper, that operates on air pressure in order to control the flow of by-pass air on a zoned system. SPRD dampers are available in both rectangular/square and round sizes.