Emerson Comprehensive Guide to Liebert Remote Shutdown and Leak Detection for Environmental Units

Component Operation and Maintenance

Figure 22 Recommended liquid sensor locations

Liebert Unit

Recommended Liebert

Liqui-tect location

Floor drain

The zone leak detection kit provides leak detection for a defined zone. This kit is ideal for perimeter sensing or serpentine coverage of small areas. A simple, two-wire connection signals the alarms at a Liebert environmental unit or at a monitoring panel. Run wires to the Liebert unit and connect them to terminals 24 and 51, 55 or 56. The sensor utilizes Liebert's LT500Y leak detection cable. The kit is offered with five different lengths of cable sized specifically for the type of Liebert Environmental unit (see matrix below). Refer to matrix below for the recommended location of leak detection cable.

Table 4 Zone leak detection kit installation scenarios

Scenarios

Upflow Unit

Detection

around

entire unit

2-ft clearance

in front

Upflow Unit

Detection on sides

and

in front of unit

2-ft clearance

in front

Downflow Unit

Detection

around

entire unit

6-ft clearance

in front

Downflow Unit

Detection on sides

and

in front of unit

6-ft clearance

in front

		Distance From Unit, feet (m)
In back	2 (0.6)	No cable behind	1 (0.3)	No cable behind
On sides	2 (0.6)	2 (0.6)	1 (0.3)	1 (0.3)
In front	2 (0.6)	2 (0.6)	6 (1.8)	6 (1.8)
Unit (footprint-in.)		Part Number
Liebert Challenger 3000
and Liebert Challenger ITR	LT460-Z30	LT460-Z20	LT460-Z30	LT460-Z25
(32.5 x 32.5)

Remote Shutdown

A connection point is provided for customer supplied remote shutdown devices. This terminal strip is located at the top of upflow units, and at the base of downflow units. Terminals 37 and 38 on the ter- minal strip are jumpered when no remote shutdown device is installed.

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