Duct Static Pressure Sensor Installation

Drill hole in duct just large enough to accomodate built in pickup tube.

Duct static pressure sensor installation.

Static pressure sensor installation guide. In ventilation systems static pressure is the pressure exerted by the air inside a building relative to the outside air pressure when exhaust fans are turned on. You might consider installing a sensor in both duct branches about 2 3 of the physical distance down the duct and then using the software to select the sensor that required the highest fan speed to meet set point. Figure 4 shows the system coming on around 6 00 am on tuesday april 5.

It senses static pressure through radially drilled holes near the tip and can be used in air flow velocities up to 12 000 fpm. All electric ddc duct static pressure control the controller uses a static pressure sensor located in the supply duct at the end of the longest run to modulate the supply fan to control duct static pressure. The mamac systems model pr276 duct static pressure transmitter incorporates sophisticated integrated circuits and a new micro machined glass on silicon gl si capacitance sensor to not only provide a high level fully conditioned and temperature compensated output but also to offer up to three 3 field selectable pressure ranges in one unit. Positioning the duct static pressure probe assembly to get the best results requires a little planning.

These sensor are normally used in conjunction with the vav 1000 2000 and 3000 series vav terminal controllers for individual zone control in hvac systems. Kele carries duct static pressure sensors and pressure accessories to fit your specifications. Vav damper positions vs. This is an indicator that the static pressure set point is too high 2.

Screw mount sensor directly to duct using self tapping screws provided. A 301 or a 302 static pressure tip is used. This model is not position sensitive and may be installed in any convenient orientation. The angled tips shown have 4 insertion depth.

Each has four radially drilled 040 sensing holes. The duct static pressure probe assembly consists of a static pres sure probe a six inch piece of silicon rubber tubing a twelve inch piece of silicon rubber tubing two self drilling sheet metal screws and a pressure spike reducer. Time too high duct static pressure set point. All except model a 303 mount in 3 8 hole in duct.

As duct static pressure increases the supply fan speed reduces. On a call for full pressure the fan runs at full speed. Move slide switch to select desired pressure range. The h port senses total pressure and the l port senses static pressure the difference between these signals is differential or velocity pressure.