MONITORING Liqui-tect® 300 INSTALLATION MANUAL Point Leak Detection Sensor
TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 EXTERIOR DIMENSIONS AND MOUNTING DETAILS. . . . . . . . . . . 1 PLACEMENT ON SUBFLOOR UNDER COOLING SUPPORT EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 WIRING TO A LIEBERT ENVIRONMENTAL UNIT . . . . . . . . . . . . . 3 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Introduction Liebert Liqui-tect® Leak Detection Sensors install quickly and work simply for reliable detection of leaks. The Liqui-tect 300 Sensor should be placed at critical points on the floor. Two corrosion-resistant, gold-plated probes sense the presence of aqueous liquids. When a leak is detected, the Liqui-tect 300 sensor generates an alarm signal at the Liebert environmental unit.
Placement on Subfloor Under Cooling Support Equipment (Other applications such as drip pans and ceiling pipe trays can be monitored) To a Liebert environmental unit Leak detection zone (directly beneath unit) LT300 As shown above, the Liqui-tect 300 (LT300) may be placed on a subfloor within the leak detection zone—the area directly beneath the unit being protected or other areas such as the unit drip pan or ceiling pipe trays. The LT300 is a two-wire connection to the Liebert environmental unit.
Wiring to a Liebert Environmental Unit The LT300 has two wires for connection to a Liebert environmental unit. Note: This sensor should be connected only to a Liebert environmental unit.
Troubleshooting Under normal conditions (no leaks), the LT300 probes create an open in-line switch. When a leak is detected (alarm condition), the switch closes. To determine whether the LT300 is working properly, perform the following test: 1. Provide one lead of a 24VAC source to the LT300 orange wire. Connect one lead of an AC voltmeter to the LT300 brown wire and the second lead of the AC voltmeter to the second lead of the 24VAC source. 2. Read the AC voltmeter to check that there is less than 1VAC.
MONITORING Liqui-tect® 300 INSTALLATION MANUAL The Company Behind the Products Technical Support/Service With over a million installations around the globe, Liebert is the world leader in computer protection systems.
