Exodraft EBC30 - Installation of Outdoor Pressure Probe (if Applicable)

3.5 Installation of outdoor pressure probe (if applicable)
The outdoor pressure probe should be mounted in a location as free as possible from rooftop obstructions. The choice of
location should also consider routing of silicone tubing into the building to minimize tubing run on the roof.
Install the probe on an existing structure like a pole, radio or TV antenna mast. Alternately, the L shaped bracket can be
attached directly to any wall or rooftop.
It is recommended that the full length of tubing (50 feet) be used. Excess tubing should be coiled at some convenient loca-
tion rather than be cut o. Longer lengths are available.
Obstructions such as trees, chimneys, signs and buildings can cause turbulence, which result in
abnormal and thus inaccurate static pressure. Position the probe as far from the sources of
The Ashcroft XTP sensor is connected to the outdoor pressure probe as shown below in Fig. 8.
XTP Sensor
In
take
Outdoor
Pr
essure Sensor
Fitting (HI)
Connect tubing for
outdoor pressure
sensor here
Fitting (LO)
Leave open for
room pressure
Fig. 8
8
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