Infrastructure Management & Monitoring For Business-Critical Continuity™ Liebert Liqui-tect® 460 Installation Manual - Zone Leak Detection Sensor
TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 EXTERIOR DIMENSIONS AND MOUNTING DETAILS. . . . . . . . . . . 1 PLACEMENT ON SUBFLOOR UNDER COOLING SUPPORT EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 WIRING TO AUXILIARY ALARM PANELS . . . . . . . . . . . . . . . . . . 4 CONFIGURATION SWITCH SETTINGS . . . . . . . . . . . . .
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Introduction Liebert Liqui-tect® Leak Detection Sensors install quickly and work simply for reliable detection of conductive aqueous fluid leaks. The Liqui-tect 460 Sensor provides zone protection using the easy-toinstall and quick-drying Liebert leak detection cable. LEDs located on the top cover of the module provide visual indication. A reset button provides optional manual acknowledgement of alarms. The top cover is hinged, allowing easy access to the electronics housed inside the steel enclosure.
Placement on Subfloor Under Cooling Support Equipment (Other applications such as long perimeter walls can be monitored) To a Liebert environmental unit and an optional* monitoring panel To external power supply or directly from unit (see Power Wiring on page 3) Leak detection cable Leak detection zone (directly beneath unit) LT460 * Output connections to external alarm monitoring panels such as the Liebert contact closure alarm panels As shown above, the Liqui-tect 460 (LT460) may be placed on a subfl
Power Wiring The LT460 is rated for 24 VAC, 50/60 Hz and 0.12 amp.
Wiring to Auxiliary Alarm Panels The LT460 has two Form-C dry contact alarm output contacts (TB2 & TB3). Each contact is rated for 24 VAC at 3 amp. Figure 3 LT460 to Liebert environmental units Liebert Deluxe Sys/3, Challenger, Himod or MM2Liebert (8 Ton) DS LT460 LT460 TB2 Environmental Env.unit Unit TB2-3 (N.C.) (N.C.) TB2-3 TB2-2 (C) (C) TB2-2 (24V) 24 (24V) TB2-1 (N.O.) (N.O.
Configuration Switch Settings A four-position DIP switch is used to select two alarm (filter) delays and three mutually exclusive alarm modes. The switches are located next to the wiring termination blocks. 1. 2. 3. 4. Leak Detect Filter Delay(SS1) Contacts Rating: Switch Settings Leak Detect Filter Alarm Latch Alarm Retest Delay Not Used S1 OFF ON 10sec 2min No Yes No 1hr — — ALL CIRCUITS: CLASS 2 Contacts shown in POWERED, NON-ALARM state 24V,3A TB3-3 TB3-2 TB3-1 N.C. C 2 N.O.
Alarm Retest Delay (SS3) SS3 selects the alarm retest delay, the setting in which an alarm is latched and retested every hour. OFF = Non-latching (default) ON = Latching-retest each hour The factory default is OFF=Non-latching. If SS3=ON and a leak is detected, the alarm condition is latched, the sensor goes into a “sleep” mode and power to the leak detection cable is discontinued. After one hour, the sensor will automatically retest if the leak is still present.
LED Operation Liqui-tect® Sensor LT460 System Normal Alarm Pending Leak Detected Reset Cable Fault System Normal (Green): • ON continuously when power is applied to sensor. Alarm Pending (Yellow): • ON continuously during leak detect filter delay and cable fault delay. • FLASHING (with Leak Detected LED) to indicate cable fault condition. Leak Detected (Red): • FLASHING to indicate leak detected alarm. • FLASHING (with Alarm Pending LED) to indicate cable fault condition.
Installation of Leak Detection System Cable 1. Attach the leak detection cable to the LT460 module. 2. Activate module and test detection cable. (Touch detection cable with a clean moist cloth or paper towel.) Dry detection cable to remove the alarm condition. (A hair dryer can be used to speed up the drying.) Note: Do not try to saturate the detection cable for testing! It only requires a small amount of water to alarm. The detection cable will have to dry for the alarm condition to clear.
4. The installation of the hold-down clips should be in pairs according to Figure 5 with the following considerations: Figure 5 Installation of hold-down clips in pairs a. One pair every 6 to 8 feet in straight patterns (see Figure 6). b. One pair every 3 to 4 feet in circular patterns (see Figure 7). c. One pair at the beginning and end of the arc when turning 90 degrees (see Figure 8). d. One pair as needed to maintain consistent uniform contact between the floor and detection cable.
Leak Detection Kit Installation Scenarios Scenarios Upflow Unit Upflow Unit Detection around entire unit Detection on sides and in front of unit 2-ft clearance in front 2-ft clearance in front Downflow Unit Downflow Unit Detection around entire unit Detection on sides and in front of unit 6-ft clearance in front 6-ft clearance in front Distance from unit Distance: In back On sides In front 2 ft 2 ft 2 ft No cable behind 2 ft 2 ft Unit 1 ft 1 ft 6 ft No cable behind 1 ft 6 ft Part number (
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