Installation
66 RT-SVX24J-EN
O/A Sensor and Tubing Installation
An Outside Air Pressure Sensor is shipped with all units
designed to operate on variable air volume applications or
constant volume units with 100% modulating exhaust w/
Statitrac.
On VAV systems, a duct pressure transducer and the
outside air sensor is used to control the discharge duct
static pressure to within a customer-specified parameter.
On CV & VAV units equipped with 100% modulating
exhaust w/Statitrac, a space pressure transducer and the
outside air sensor is used to control the exhaust fan and
dampers to relieve static pressure, to within a customer-
specified parameter, within the controlled space. Refer to
Figure 44, p. 66 and the following steps to install the
sensor and the pneumatic tubing.
1. Remove the O/A pressure sensor kit located inside the
“ship with” item container.The kit contains the
following items:
a. O/A static pressure sensor with slotted mounting
bracket
b. 50 ft. 0.188 in tubing
c. Mounting hardware
2. Remove the two roof cap screws and install the
provided L mounting bracket as shown in the figure.
3. Place the sensor mounting slotted bracket to the L
mounting bracket with
the slot located to the top.
4. Install the sensor vertically to the slotted bracket and
secure it with provided
bolt and nut.
5. Connect one end of factory provided tubing to the top
port of sensor and
pass it through the two slots in the
mount and the other end to the port in the base.
6. Secure the tubing with the mounting hardware located
in the ship with item
container.
Units with Statitrac:
1. Open the filter access door, and locate the Space
Pressure and Duct Supply Pressure control devices
illustrated in Figure 45, p. 67.There are three tube
connectors mounted on the left of the solenoid and
transducers. Connect one end of the field provided1/4"
(length 50-100 ft.) or 3/8" (length greater than 100 ft.)
O.D. pneumatic tubing for the space pressurization
control to the bottom fitting.
2. Route the opposite end of the tubing to a suitable
location
inside the building.This
location should be
the largest open area that will not be affected by
sudden static pressure changes.
Figure 44. Outside air sensing kit
Sensor
Sensor mounting
slotted bracket
0.188in OD tubing
L bracket
Sensor mounting
screws
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