Multi range differential zone pressure transmitters.
Duct static pressure sensor location.
Two thirdsthe distancefrom the supply fan to the end of the.
Expect some field adjustmentto be requiredto find.
As the zone dampers throttle back the duct pressure rises and the fan is controlled to reduce the duct pressure.
Is the static pressure set point too high or too low.
This will allow for effi cient operation figure 1 even if the reset logic has failed due to a rogue zone or other problem.
Run two 1 4 inch sensing lines high and low to the sensing location.
Locate the static pressure sensor at the panel.
Choose a static pressure sensor that allows the hvac controller to operate in the upper half of the sensor s normal operating range.
The sensor is field installed and the controller is set to maintain the duct.
Air pressure sensors surge dampeners.
Duct static sensors a300 series rps sd 01 21121 60681.
The pressure is measured by the sensor p located approximately 2 3rdof the way down the main duct starting air handling unit.
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.
Locate the static pressuresensor for modulatingfan.
Once the sensor is installed you could fine tune the set point there as necessary to ensure that you had adequate pressure everywhere else.
In many systems the first locationis.
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 there a reset schedule for the duct static pressure.
So you might select 2 3 of the physical distance down that duct.
Sensors located above a ceiling tend to get lost and forgotten.
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.
When analyzing the static pressure the trends to look for include.
The recommended frequency of data collection is between 5 and 30 minutes.
For the longest time i never questioned this logic.
Duct static pressure duct static pressure set point zone damper position signal.
Kele overview 24 product categories line card 300.
Avoid locations where air stratification can cause changes in airflow.
I would pick a point in the longer duct because that is more likely to be the duct run that set the fan system static.
More who we are.
Capacity out in the supply duct system not at the fan.
Location mount the static pressure probe on the duct plenum or air handler to allow exposure to the average airflow.
