Emerson SL-31080 specifications Troubleshooting Guide, Enclosure Mounting Instructions

Mounting

Junction box 2" x 4"

Mounting screws

Cover

Wall

Delta base

Locking screws

NOTE

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.

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.

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.

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	• Make sure the sensor is installed properly, and is not shorted.
20 mA or 100%	• Quick Check: Remove the sensor. If the reading does not change, contact technical
	support.
Humidity reading is minimum	• Verify that the humidity sensor installed.
	• Quick Check: Short the sensor terminal block with a wire. Does the reading change? If so,
4 mA or 0%
	the sensor may be faulty; if not, contact technical support.
Humidity reading in software	• Check all software parameters.
appears to be off more than	• If available, check the sensor against a calibrated control such as a hygrometer.
specified accuracy	• Determine if the sensor is exposed to an external source more than room.
Temperature sensor in front-	• Make sure wiring is correct.
end software is reading high	• Disconnect wires and measure with a multimeter.
Temperature sensor in front-	• Make sure wiring is correct.
end software is reading low	• Disconnect wires and measure with a multimeter.

SL-31080 Product Specification/Installation Sheet page 2 6/03 (Rev. 0)