Emerson LT410, LT300 User Manual
LIQUI-TECT® 410
Point Leak Detection Sensor
Description
The Liqui-tect 410
(LT410) provides a
single-point detection
of leaks. The point
detection sensor has
two gold-plated
sensing probes to
prevent corrosion
resistance and to
provide accurate
readings. The LT410
constantly monitors
points for leaks,
internal faults and power failures and warns of any
abnormal conditions. Mounting brackets allow for
sensor height adjustment and leveling.
The LT410 is the ideal solution for sensing leaks under
a raised computer floor or air conditioning drip pans.
Two independent outputs provide added flexibility
with the capacity to signal both a local alarm panel
and a remote building management system or external
equipment, such as motorized water shut-off valves.
The LT410 is also ideally suited for the following:
Applications Locations
• Glycol, Chilled
Water Cooling
• Humidification
Feed Water Piping
• Condensate Pumps
and Drains
• Unit and Ceiling
Auxiliary Drip Pans
• Overhead Piping
Troughs
Placement on Subfloor
Under Cooling Support Equipment
• Large-Scale Network Control
Centers
• Data Centers
• Server Rooms - Closets
• Unattended Remote Shelters
• Mechanical Equipment Rooms
• Sensitive Areas With
Overhead Piping
• Industrial Process Control
Rooms
Specifications
Liqui-tect 410 Sensor
Power requirements 24 VAC 100 mA, 50/60 Hz, 3 VA (max.)
Dimensions
W x D x H
Weight (assembled) 2.0 lbs (0.9 kg)
Metal enclosure NEMA 1, IP 30
Environmental Conditions
Operating temperature 50°F to 104°F (10°C to 40°C)
Operating humidity
Operating altitude 0 to 10,000 ft (0 to 3,048 m)
Output Relays
Contact rating 2 Form-C; 3 A rating at 24 VAC
Agency Listings
UL UL916
C-UL C22.2, No. 205-M1983
CE Yes
FCC Compliance 47 CFR, Part 15
6.35" x 2.25" x 4.46"
(161.2 mm x 57.2 mm x 113.2 mm)
10% to 95% relative humidity
(non-condensing)
Dimensions-Top, Front & Side Views
4.46"
(113.2mm)
TOP VIEW
5.85"
(148.5mm)
FRONT VIEW
6.35"
(161.2mm)
Form-C relay
outputs &
power wiring
connection
Adjustable
probe height
0.0–0.5"
(0.0–12.7mm)
Shipping weight: 2 Ibs (0.9 kg)
Mounting holes: #8 screws
SIDE VIEW
2.25"
(57.2mm)
Wiring Interconnections
Red Wires Orange Wires Yellow Wires
24 V, AC/DC
@0.10A, 50-60 Hz, DC
Class 2 Circuit Only
Alarm Contact Rating
24 VAC @ 3A
Class 2 Circuit Only
Power
Power
1-NO
Alarm Contact Rating
24 VAC @ 3A
Class 2 Circuit Only
1-NC
1-COM
2-NO
2-NC
2-COM
To a Liebert
environmental
unit and
an optional*
monitoring
panel
To e x tern al
power
supply or
directly
from
unit
LT4 10
* Output connections to external alarm monitoring panels
such as the Liebert contact closure alarm panels
Leak detection
zone (directly
beneath unit)
Ordering Information
Product
Number
LT410 Point Leak Detection Sensor
Gold-plated
probes
Quantity Description
Height adjustable
0-0.5" (0-12.7mm)
Product Specification Sheet page 1 11/02 (Rev. 0)
Power Wiring
4
t
t
24V from Transformer to LT460
Wiring to Auxiliary Alarm Panels
The LT410 is rated for 24 VAC, 50/60 Hz and
0.10 amp.
Figure 1 24V from Liebert environmental units to LT410
Liebert Deluxe Sys/3,
Liebert Deluxe System/3,
Challenger, Himod or
Challenger, Himod or
MM2 (8 Ton)
Mini-Mate2 (8 ton) LT410
TB1
T5
(24V)
T5 (24V)
G5
(Ground)
G5 (Ground)
Liebert MM2 (1 to 5 Ton) LT460
V transformer of
ere are no
ted terminal
ions)
V transformer of
ere are no
ted terminal
ions)
Power Wiring
(24V)
(Ground)
24V from Liebert Environmental Unit to LT460
Liebert Deluxe Sys/3,
24V from Transformer to LT460
Challenger, Himod or
MM2 (8 Ton)
Transformer
TB1
T5
(24V)
From 24V
transformer
G5
(Ground)
Liebert Mini-Mate2
Liebert MM2 (1 to 5 Ton) LT460
(1 to 5 ton)
(24V)
From 24V
(Ground)
transformer*
* Requires a 24V external transformer (there are
no designated terminal connections on the unit)
24V from Transformer to LT460
LT460
Red wiresTB1
TB1
TB1
LT460
LT460
TB1
TB1
LT410
Red wires
TB1
TB1-1
Red
TB1-2
Red
TB1-1
TB1-2
Location of
T5 (24V)
connection
on main
controller
board of
Liebert unit
TB1-1
TB1-1
TB1-2
TB1-2
TB1-1
Red
TB1-2
Red
The LT410 has two Form-C dry contact alarm output contacts: orange wires (1) and yellow wires (2).
Each contact is rated for 24 VAC at 3 amp.
Figure 3 LT410 to Liebert environmental units
LT460 to Liebert Environme ntal Unit
LT460
LT410
Orange wires
TB2
TB2-3
(N.C.)
1-NC
TB2-2
(C)
1-COM
TB2-1
(N.O.)
1-NO
LT460
LT410
Orange wires
TB2
TB2-3
(N.C.)
1-NC
TB2-2
(C)
1-COM
TB2-1
(N.O.)
1-NO
Liebert Deluxe System/3,
Liebert Deluxe Sys/3,
Challenger, Himod or
Challenger, Himod or
MM2 (8 Ton)
Mini-Mate2 (8 ton)
Environmental
Env. Unit
unit
24
(24V)
24 (24V)
51
51, 55 or 56
Liebert Mini-Mate2
Liebert MM2 (1 to 5 Ton)
(1 to 5 ton)
Environmental
Env. Unit
unit
TB1-1
(24V)
TB1-1 (24V)
TB1-2
TB1-2 or TB1-3
OR
Figure 4 LT410 to Liebert contact monitor panel
Liebert Contact
Monitor Panel
panel
Alarm panel
Alarm P anel
Input
Input
Contact
contact
(N.O.)
(N.O.)
TB2-3
2-NC
TB2-2
2-COM
TB2-1
2-NO
LT460
LT4 10
Yellow wires
TB2
(N.C.)
(C)
(N.O.)
Liebert contact monitor
LT460
Figure 2 24V from transformer to LT410
Transformer LT410
Transformer
From 24V
From 24V
transformer
transformer
LT460
Red wires
TB1
Red
TB1-1
TB1-2
Red
Product Specification Sheet page 2 11/02 (Rev. 0)
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