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SL-31080 Product Specification/Installation Sheet page 2 6/03 (Rev. 0)
Mounting
Enclosure Mounting Instructions
Mounting hardware is provided for both junction box
and drywall installation.
1. Pull the wires through the opening in the base
plate.
2. For junction box installation: Secure the
base to the box using the #6-32 x 1/2" mounting
screws provided.
For drywall installation: Drill two 3/16" holes
3-1/4" apart on center. Insert the drywall
anchors and secure the base using the #6 x 1"
sheet metal screws provided.
3. Terminate the unit according to the guidelines
in Termination on page 1.
4. Attach the cover by latching it to the top of the
base, rotating the cover down and snapping it
into place.
5. Secure the cover by backing out the lock-down
screws using a 1/16" allen wrench until they are
flush with the bottom of the cover.
Troubleshooting Guide
The following table lists common problems and possible solutions. For more information, consult your local
dealer, Liebert representative or the Liebert Worldwide Support Group.
Junction box
2" x 4"
Mounting
screws
Cover
Delta
base
Wall
Locking
screws
NOTE
In a 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 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.
Problems Possible Solutions
Unit will not operate
• Check +24 VDC power supply at controller.
• Disconnect the sensor and check power wires for +24 VDC.
Humidity reading is maximum
20 mA or 100%
• Make sure the sensor is installed properly, and is not shorted.
• Quick Check: Remove the sensor. If the reading does not change, contact technical
support.
Humidity reading is minimum
4 mA or 0%
• Verify that the humidity sensor installed.
• Quick Check: Short the sensor terminal block with a wire. Does the reading change? If so,
the sensor may be faulty; if not, contact technical support.
Humidity reading in software
appears to be off more than
specified accuracy
• Check all software parameters.
• If available, check the sensor against a calibrated control such as a hygrometer.
• Determine if the sensor is exposed to an external source more than room.
Temperature sensor in front-
end software is reading high
• Make sure wiring is correct.
• Disconnect wires and measure with a multimeter.
Temperature sensor in front-
end software is reading low
• Make sure wiring is correct.
• Disconnect wires and measure with a multimeter.