Infrastructure Management & Monitoring For Business-Critical Continuity™ Liebert Liqui-tect ® 460 Installation Manual - Zone Leak Detection Sensori TABLE OF CONTENTS I NTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 E XTERIOR D IMENSIONS AND M OUNTING D ETAILS . . . . . . . . . . .1 P LACEMENT ON S UBFLOOR U NDER C OOLING S UPPORT E QUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 P OWER W IRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 W IRING TO A UXILIARY A LARM P ANELS . . . . . . . . . . . . . . . . . .4 C ONFIGURATION S WITCH S ETTINGS . . . . . . . . . . . . . . . . . . . .5 Leak Detect Filter Delay(SS1) . . . . . . . . . . . . . . . . . . . . . . . . . .5 Latching or Non-Latching Alarms (SS2) . . . . . . . . . . . . . . . . . .5 Alarm Retest Delay (SS3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 LED O PERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 N OTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 I NSTALLATION OF L EAK D ETECTION S YSTEM C ABLE . . . . . . . .8 L EAK D ETECTION K IT I NSTALLATION S CENARIOS . . . . . . . . .10ii1 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-to- install 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. Terminal blocks allow easy interconnection of power and alarm outputs. Dual Form-C relay outputs can simultaneously signal the local alarm panel and remote monitoring system. The Liqui-tect 460 Sensor fea- tures supervised operation through alarms for cable faults, circuit fail- ure or loss of power, ensuring a completely self-monitored leak detection system. The LT460 is conveniently available in packaged kits with 20, 25, 30, 35 or 45 feet of leak detection cable and hold-down clips. Note that additional cable cannot be added to packaged kits. The LT460 sensor can also be purchased independently. The sensor can accommodate up to 100 feet of leak detection cable if the sensor and leak detection cables are purchased as independent components. Exterior Dimensions and Mounting Details 4.75" (120.65mm) 4.25" (108mm) 3.25" (83mm) 4.75" (121mm) 2" (51mm) Shipping weight:2 Ibs (0.9 kg) Mounting holes:#8 screws TOP VIEW Leak detection cable connector Form-C relay outputs & power wiring connection FRONT VIEW2 Placement on Subfloor Under Cooling Support Equipment (Other applications such as long perimeter walls can be monitored) As shown above, the Liqui-tect 460 (LT460) may be placed on a sub- floor, where it is connected to the leak detection cable that surrounds the leak detection zone—the area directly beneath the unit being protected or other areas such as the perimeter of a room. Note: For a downflow unit, the leak detection cable must be located six feet in front of the unit. The LT460 requires a 24 VAC power supply either from the environ- mental unit or an external source. There are two sets of Form-C dry contacts for connection to a Liebert environmental unit and an exter- nal monitoring panel. For more information: •See Installation of Leak Detection System Cable on page8 for instructions on installing the cable and proper placement of the hold-down clips. •See Leak Detection Kit Installation Scenarios on page10 for cable placement, distance from the unit, and part numbers. *Output connections to external alarm monitoring panels such as the Liebert contact closure alarm panels Leak detection zone (directly beneath unit) Leak detection cable To a Liebert environmental unit and an optional* monitoring panel To external power supply or directly from unit (see Power Wiring on page3) LT4603 Power Wiring The LT460 is rated for 24 VAC, 50/60 Hz and 0.12 amp. Figure124V from Liebert environmental units to LT460 Figure224V from transformer to LT460 4V transformer of here are no ated terminal tions) From 24V transformer* TB1-2 TB1-1 TB1 Liebert Mini-Mate2 (1 to 5 ton)LT460 *Requires a 24V external transformer (there are no designated terminal connections on the unit) 4V transformer of here are no ated terminal tions) T5 (24V) TB1-2 TB1-1 G5 (Ground) TB1TB1 Liebert DS, Deluxe System/3, Challenger, Himod or Mini-Mate2 (8 ton)LT460 Location of T5 (24V) connection on Liebert unit From 24V transformer TB1-2 TB1-1 TB1 TransformerLT4604 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. Figure3LT460 to Liebert environmental units Figure4LT460 to Liebert contact monitor panel TB1-2 TB2-3 (N.C.) TB2 Liebert DSLT460 TB2-2 (C) TB2-1 (N.O.) Environmental unit 24 (24V) 50, 51, 55 or 56 TB2-3 (N.C.) TB2 Liebert Deluxe System/3, Challenger, Himod or Mini-Mate2 (8 ton) LT460 TB2 Liebert Mini-Mate2 (1 to 5 ton) LT460 TB2-2 (C) TB2-1 (N.O.) TB2-3 (N.C.) TB2-2 (C) TB2-1 (N.O.) Environmental unit Environmental unit 24 (24V) 51, 55 or 56 TB1-1 (24V) TB1-2 or TB1-3 TB2-3 (N.C.) TB2-2 (C) TB2-1 (N.O.) TB2 LT460 Alarm panel Liebert contact monitor panel Input contact (N.O.)5 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. Leak Detect Filter Delay(SS1) SS1 selects the leak detect filter delay, the interval for which a leak condition must be continuously detected before an alarm is triggered: OFF=10 seconds (default) ON=2 minutes This feature is useful for eliminat- ing nuisance alarms. SS1 works independently of the settings of SS2 and SS3. While the alarm delay is selectable (factory default is OFF=10 seconds), the cable fault delay is preset at approximately 2seconds. Latching or Non-Latching Alarms (SS2) SS2 selects latching or non-latching alarms, the setting in which an alarm will latch ON until manually reset: OFF=Non-latching (default) ON=Latching The factory default is OFF=Non-latching. If the sensor is in latching mode (ON=Latching) and the leak condition clears itself in the interim, a manual reset is required. While the alarm is latched, the sensor goes into a “sleep” mode and power to the leak detection cable is discontinued. De-powering the cable prevents damage to the cable should it be in contact with the conductive liquid for an extended duration. After a manual reset, the sensor resumes its normal opera- tion, continuously checking for leaks. If the leak condition has not yet cleared but the sensor is manually reset, the sensor will re-alarm after the appropriate leak detect filter delay. SS2 in the ON position will disable the operation of SS3. Switch Settings OFFON S1 1.Leak Detect Filter 10sec2min 2.Alarm Latch NoYes 3.Alarm Retest Delay No1hr 4.Not Used —— Contacts Rating: 24V,3A CONNECT ENCLOSURE TO EARTH GROUND TB3-3 TB3-2 TB3-1 TB2-3 TB2-2 TB2-1 TB1-2 TB1-1 Contacts Rating: 24V,3A 24V 50/60Hz 0.12A 2 1 N.C. C N.O. N.C. C N.O. ALL CIRCUITS: CLASS 2 Contacts shown in POWERED, NON-ALARM stateNext >