Duct Static Pressure Sensor Location

Capacity out in the supply duct system not at the fan.

Duct static pressure sensor location.

This will allow for effi cient operation figure 1 even if the reset logic has failed due to a rogue zone or other problem. Locate the static pressuresensor for modulatingfan. Duct static pressure duct static pressure set point zone damper position signal. For the same reason the static pressure sensor should be located as far out into the duct system as is practical so that the high end of the setpoint range 1 3 in.

Two thirdsthe distancefrom the supply fan to the end of the. Location mount the static pressure probe on the duct plenum or air handler to allow exposure to the average airflow. The recommended frequency of data collection is between 5 and 30 minutes. For the longest time i never questioned this logic.

As the zone dampers throttle back the duct pressure rises and the fan is controlled to reduce the duct pressure. Sensors located above a ceiling tend to get lost and forgotten. For the longest time i have been told and have seen in the field static pressure sensors controlling vortex or vfd located at the fan discharge or downstream of the duct before any take offs. Is the static pressure set point too high or too low.

Locate the static pressure sensor at the panel. Run two 1 4 inch sensing lines high and low to the sensing location. Avoid locations where air stratification can cause changes in airflow. In many systems the first locationis.

Is there a reset schedule for the duct static pressure. Kele overview 24 product categories line card 300. When analyzing the static pressure the trends to look for include. The most commonly recommended static pressure sensor location is a point in the supply duct at which the duct static pressure at design flow is approximately two thirds of the duct static pressure drop from the fan outlet to the terminal unit inlet.

The sensor is field installed and the controller is set to maintain the duct. The pressure is measured by the sensor p located approximately 2 3rdof the way down the main duct starting air handling unit. So you might select 2 3 of the physical distance down that duct. The normal range for duct static pressure is from 0 75 in.

Expect some field adjustmentto be requiredto find. Duct static pressure transmitter. Air pressure sensors surge dampeners. 325 pa in this example can be as low as possible.

More who we are. Multi range differential zone pressure transmitters. Once the sensor is installed you could fine tune the set point there as necessary to ensure that you had adequate pressure everywhere else.