BAPI PreCon Style Room Units Catalog Page
PreCon Style Room Units with Thermistor, RTD or
Semiconductor Sensor (BA/-RSZ)
Termination and Troubleshooting
9546_ins_temp_rsz+
Product Identication
The PreCon Style Room Sensor is available as a temperature sensor alone or as a “+”
version with Setpoint, Override, Communications Jack and LED. An optiona Bi-Metal
Indicator is available for both versions.
Setpoint
A 3-position switch allows limited control over the zone’s setpoint. In the center position,
the Setpoint is at the system default. If the switch is moved to the left or right, the
Setpoint is decreased or increased by a system dened amount.
Override
Allows the occupant to extend the zone occupancy schedule by a system determined
amount. Each time the switch is moved to the side, the controller will register an
occupancy override. The closed switch then springs back to the normally open position.
Communication Jack
The “+” unit includes a 5-pin Comm Jack.
LED
The “+” unit includes an LED that can be lit with 5VDC from the BAS system.
Mounting
rev. 06/26/15
Fig. 1: PreCon Style Room
Sensor
Mounting hardware is provided for both junction box and drywall installation (junction
box installation shown).
Junction Box
1. Pull the wire through the wall and out of the junction box, leaving about six
inches free.
2. Pull the wire through the hole in the base plate.
3. Secure the plate to the box using the #6-32 x 1/2 inch mounting screw provided.
4. Terminate the unit according to the guidelines in Termination on page 1.
5. Attach Cover by latching it to the top of the base, rotating the cover down and
snapping it into place.
6. Secure the cover by backing out the lock-down screws using a 1/16” allen
wrench until they are ush with the bottom of the cover.
Drywall Mounting
1. Place the base plate against the wall where you want to mount the sensor.
2. Using a pencil mark out the two mounting holes and the area where the wires
will come through the wall.
3. Drill two 3/16” holes in the center of each marked mounting hole. Insert a drywall anchor into each hole.
4. Drill one 1/2” hole in the middle of the marked wiring area.
5. Pull the wire through the wall and out of the 1/2” hole, leaving about six inches free.
6. Pull the wire through the hole in the base plate.
7. Secure the base to the drywall anchors using the #6 x 1 inch mounting screws provided.
8. Terminate the unit according to the guidelines in Termination on page 1.
9. Attach cover by latching it to the top of the base, rotating the cover down and snapping it into place.
10. Secure the cover by backing out the lock-down screws using a 1/16” allen wrench until they are ush with the bottom
of the cover.
Fig. 2: PreCon Style J-Box Mounting
NOTE: In a wall-mount application, the wall temperature and the temperature of the air within the wall cavity can cause er-
roneous readings. The mixing of room air and air from within the wall cavity can lead to condensation, erroneous readings
and premature failure of the sensor. To prevent these conditions, seal the conduit leading to the junction box and seal the
hole in the drywall by using an adhesive backed, foam insulating pad(order part number BA/FOAMBACK).
Specications subject to change without notice.
1 of 4
PreCon Style Room Units with Thermistor, RTD or
Semiconductor Sensor (BA/-RSZ)
Termination and Troubleshooting
9546_ins_temp_rsz+
Termination
BAPI recommends using twisted pair of at least 22AWG and sealant lled connectors for all wire connections. Larger
gauge wire may be required for long runs. All wiring must comply with the National Electric Code (NEC) and local codes.
Do NOT run this device’s wiring in the same conduit as AC power wiring of NEC class 1, NEC class 2, NEC class 3 or with
wiring used to supply highly inductive loads such as motors, contactors and relays. BAPI’s tests show that uctuating and
inaccurate signal levels are possible when AC power wiring is present in the same conduit as the signal lines. If you are
experiencing any of these difculties, please contact your BAPI representative.
BAPI recommends wiring the product with power disconnected. Proper supply voltage, polarity, and
wiring connections are important to a successful installation. Not observing these recommendations may
damage the product and will void the warranty.
RSZ+ Units with Setpoint, Override and Communications Jack
Pin # Description Connection
8 Comm Jack Pin 4 Connected from terminal block thru Comm. Jack
rev. 06/26/15
Fig. 3: PreCon RSZ+
Unit Circuit Board
7 Comm Jack Pin 3 Connected from terminal block thru Comm. Jack
LED (+) Anode Connected to +5VDC to power LED
6 Comm Jack Pin 2 Connected from terminal block thru Comm. Jack
5 Comm Jack Pin 1 Connected from terminal block thru Comm. Jack
4 LED (-) Cathode To GND (Common) of Controller thru a 1KΩ Resistor
3 Setpoint & Override Resistive Output - To Analog Input of controller.
(Reference to ground)
2 Sensor Resistive Output - To Analog Input of controller.
(Reference to ground)
1 GND (Common) To GND or Common of controller
(Connected internally to Comm Jack Pin 5)
Setpoint Switch 1 (SW1)
Override Switch 2 (SW2)
Setpoint
= 10K ohms
Normally
Open Position
Specications subject to change without notice.
Setpoint
= 20K ohms
Spring
Return
Override Position =
Momentary Short
Normally
Open Position
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