BAPI Wall Plate with Keyswitch Override Catalog Page
Wall Plate with Keyswitch Override (BA/-SP/AP-K)
1.8KΩ Orange/Red 10K-3Ω Yellow/Red 100Ω Red/Red 1KΩ Green/Green
2.2KΩ Brown/White 10K-3(11K)Ω Yellow/Blue 1KΩ Orange/Orange
3KΩ Yellow/Black 20KΩ White/White 2KΩ Brown/Blue
3.25KΩ Brown/Green 47KΩ Yellow/Orange 100Ω Red/Red/Black
3.3KΩ Yellow/Brown 50KΩ White/Blue 1KΩ Orange/Orange/Black LM334 Red/Black
10K-2Ω Yellow/Yellow 100KΩ Yellow/White AD592 Red/Black
AD592-10K Red/Black/White
Nickel RTD
Silicon RTD
Semiconductors
Thermistors
Table 1: Temperature Sensor Lead Wire Colors
Thermistors
Platinum RTDs - 2 Wire
Platinum RTDs - 3 Wire
Common Pin 1
Normally Open
Pin 2
Normally Closed
Pin 8
Table 2
Key Sw itch Contacts
*
Installation & Operating Instructions
8589_ins_sp_ap_k rev. 08/01/18
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. 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.
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.
Fig. 1: Wall Plate
with Keyswitch
Temperature Sensor Termination:
Terminate the sensor wires to your controller wires using BAPI sealant lled connectors. The wallplate’s foamback
insulates the temperature sensor from the wall temperature and/or conduit drafts.
Keyswitch Termination:
The keyswitch has normally open and normally closed contacts. The switch
closes with a 45° clockwise turn. The key will spring return to the open position.
The switch is terminated with three white wires. The switch contacts are
indicated on the back of the switch. The keyswitch is for NEC Class 2 circuits
only, 4 amps maximum.
*All Thermistors 20KΩ and smaller are CE compliant.
Specications subject to change without notice.
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Wall Plate with Keyswitch Override (BA/-SP/AP-K)
Installation & Operating Instructions
8589_ins_sp_ap_k rev. 08/01/18
Mounting
Ensure the plate does not touch the wall when it is mounted as this will lead to slower response
rates when the environment changes.
Mounting hardware is provided for both junction
box and drywall installation.
Junction Box
1. Pull the wire through the wall and out of the
junction box, leaving about 6” free.
2. Terminate the unit according to the guidelines
in Termination on page 1.
3. Secure the plate to the box using the
#6-32 x 1/2” mounting screws provided or with
security screws which are sold separately.
(Call BAPI or visit the Accessories section of
our website for security screw ordering.)
4. Tighten screws until the foam gasket on the
back plate is compressed about 50%. Ensure
the plate doesn’t touch the wall (Fig 2).
Note: Louvered wall plates require a mounting
adapter bracket for J-Box mounting. The bracket
is not shown in the diagram above but is included with any louvered wall plates ordered from BAPI.
Verify visible
air gap
between plate
and wall.
Fig 2:
Side View of
Mounted Plate
Fig 3:
J-Box Mounting
Drywall Mounting
1. Place the plate against the wall where you want to mount the sensor and mark out the two mounting holes.
2. Drill two 3/16” holes in the center of each marked mounting hole. Insert a drywall anchor into each hole.
3. Cut hole between the mounting holes that clears the apparatus mounted on plate. Pull the wire through the wall hole
cut in step 2, leaving about 6” free.
4. Terminate the unit according to the guidelines in Termination on page 1.
5. Secure the plate to the drywall anchors using the #6 x 1” mounting screws provided. Tighten screws until the foam
gasket on the back plate is compressed about 50%. Ensure the plate doesn’t touch the wall.
Note: In any wall-mount application, the wall temperature and the temperature of the air within the wall cavity can cause
erroneous 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 or
ll the box with insulation.
Diagnostics
Possible Problems:
Controller reports
inaccurate temperature
Possible Solutions:
- Conrm that the input is set up correctly in the controller software.
- Check wiring for proper termination and verify that the wires are not electrically
shorted or open
- Disconnect the controller wires from the sensor. Measure the temperature
sensor’s resistance with an ohm-meter. Verify the sensor’s output is correct
(see note below). If the measured resistance is different from the temperature
table by more than 5%, call BAPI technical support. To view the appropriate
temperature table on the BAPI website, go to http://www.bapihvac.com. Click
on “Resource Library” and “Sensor Specs”, then on the table needed.
Keyswitch is not working
correctly
- Disconnect the controller wires from the keyswitch. Without turning the
key, verify the resistance from pin 1 to pin 8 is 1Ω or less. While turning the
keyswitch, verify the resistance from pin 1 to pin 2 is 1Ω or less.
Specications subject to change without notice.
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