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Catalog No. 11-808-639-01

3 of 8

Specifications subject to change without notice.

Water Leak Detector

Installation and Troubleshooting

#26268

– 02

/28/2020

Specifications

Power

24VAC +/- 10%

5 Amp Relays

4 VA max

Wiring

Flex connector or liquid-tight fitting

Relays

Up to 6 wires

Transmitter

2 wires for Power

Mounting

Lays in the pan or attached with a pan

edge hook with screws

Sensor

Standard

Single SS probe from bottom of BB with

adjustable depth screw from .063” to
.84”

Optional

Remote spot water sensor with depth
screw with adjustable depth from
1/16” to l/2”

Optional

Remote rope water sensor
Detects water over the full length at
depths >0.125”.

NOTE

100 ft.

maximum including non-sensing
extension cable.

Detector Transmitter

Alarm Contacts Two SPDT, 5A relay outputs

SPDT, 30 VAC/DC max

Selectable as normally
Energized or De-energized

Indication

1 Green Power LED, 1 Red Alarm LED

Reset Action

If latching, local push button or power

interrupt

Sensor Reaction Responds to presence of water within 5

seconds

Termination

Terminal strip, 4-10 terminals, 12-24 AWG

Agency

RoHS, UL94V-0, UV-rated in Enclosure

Set Up

BB Sensor

Adjustable depth from .063” to

.84” (≈1/16th” default)

Remote Sensor

Adjustable depth from .063” to

.84” (≈1/16th” default)

Latching

Latching version - Stays

Jumper

energized after water has dried up

Non-latching version (default) -
Alarm follows wet or dry surface

Supervision

Supervised version (default) -

Jumper

De-energized when in alarm.

NOTE

Relay will drop out on loss

of power indicating a water
detection alarm.

Unsupervised version -
Energized when in alarm.

Enclosure Ratings

Transmitter

BB Box, NEMA 4

Remote Spot

Submersible, w/ FEP plenum-

Sensor

rated, waterproof cable

Rope Sensor

Plenum rated

Ambient

Transmitter (BB) -40 to 185ºF (-40 to 85ºC),

0 to 95%RH, Non-condensing

Remote Spot -40 to 185ºF (-40 to 85ºC),
Sensor

0 to 95%RH, Condensing

Rope Sensor

32 to 167ºF (0 to 75ºC),

0 to 95%RH, Non-condensing

Enclosure Materials

Transmitter (BB) Polycarbonate

Remote Sensor Aluminum bracket w/ ABS
plastic shell

Содержание NSB-LDT4-PS-BB

Страница 1: ...nsmitter can be set for latching alarm or non latching alarm with normally energized or de energized operation An optional remote water sensor is available for small inaccessible locations such as AHU pans or under floor water detection Figure 2 Water Leak Detector above with Remote Spot Sensor right and 10 ft FEP cable Part NSB LDT4 RS10 BB Water Leak Detector above with Water Rope Sensor below P...

Страница 2: ...notice Water Leak Detector Installation and Troubleshooting 26268 02 28 2020 Figure 3 Water Leak Detector with Built in Sensor and a 5 Amp Relay in a System Diagram Side View Figure 4 Water Leak Detector with Remote Spot Sensor and a 5 Amp Relay in a System Diagram Side View ...

Страница 3: ...tching local push button or power interrupt Sensor Reaction Responds to presence of water within 5 seconds Termination Terminal strip 4 10 terminals 12 24 AWG Agency RoHS UL94V 0 UV rated in Enclosure Set Up BB Sensor Adjustable depth from 063 to 84 1 16th default Remote Sensor Adjustable depth from 063 to 84 1 16th default Latching Latching version Stays Jumper energized after water has dried up ...

Страница 4: ...sor down firmly Mount the detector enclosure in a visible location within cable length of the remote water sensor Alternatively a remote water sensor can be attached to the floor with screws Figure 8 Mount the detector enclosure in a more visible location within cable length of the remote water sensor Alternatively a rope water sensor can be laid on the floor or under pipes as shown in Figures 10 ...

Страница 5: ... Pipe Sensor Mounting Figure 12 Vertical Pipe Sensor Mounting The following combinations of sensors can be used 1 Two rope sensors with a combined length of no more than 100 2 Two spot sensors with a combined length of no more than 75 3 One spot sensor with a maximum length of 25 and one rope sensor of no more than 50 Note Shielded or twisted pair wire cannot be used to extend the sensor wires Thi...

Страница 6: ...M1 Alarm Contact 1 Common NO1 Alarm Contact 1 Normally Open to C1 when De energized GND NEU Power supply ground neutral V HOT Power supply input 24VAC 10 Not used for low current relay version SPST Form A Sensitivity Adjustment for 10 Remote Rope Sensor The unit s leak detection sensitivity is set at the Sensitivity Adjustment Potentiometer factory However for the remote rope sensors the sensitivi...

Страница 7: ...th for alarm Operation Sequence When power is applied the green LED will illuminate and the unit will start to detect for water at the sensor probe When there is no detection of water normal condition the relays are not in an alarm state and the red LED remains off For units set up in the unsupervised relay mode the relays are de energized For units set up in the supervised relay mode default the ...

Страница 8: ... no dirt or debris collected around the probes Dirt or debris around the probes may cause nuisance alarms in moist situations Change the service intervals depending on environmental conditions In very clean conditions the probe may never need maintenance Rope sensor may be wiped down with isopropyl alcohol warm soapy water on a cotton cloth or placed in a dishwasher Caution This unit is not intend...

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