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KELE • www.kele.com • FAX 800-284-5353

USA 888-397-5353 • International 901-382-6084

Red Stopper

Air Flow

Intake
Tube
(order 
separately)

Exhaust
Tube
(provided)

Top of Detector

Entire Width

of Duct

(+) PILOT OUT

10A

ALARM

CONTACT

1

2

3

4

5

6

7

8

9

10

G

220

115

H

11

12

13

14

15

16

17

18

19

20

GROUND

(-) COMM

10A

*TROUBLE

CONTACTS

NO

POWER

INPUT

24

VAC/VDC

10A

ALARM

CONTACT

NC

NC

NO

( - )

( + )

C

C

POWER

INPUT

220/240

VAC

120

VAC

NC

NO

C

C

NO

CONNECTION

INTERCONNECT

ALARM LINK

(-)     (+)

AUX

POWER

OUT

2A

ALARM

CONTACT

NO

RESET INPUT

* Trouble contacts are shown in non-energized condition. Under normal operation 
  contacts will be reversed.

-

BLK

1

20

1

20

1

20

12

20

12

20

12

20

14

19

13

13

14

19

20

13

14

19

20

All alarm relays operate with single alarm

Individual horn/strobe operate on alarmed
detector only

30 detectors max

All alarm relays operate with single alarm

30 detectors max

Common test/reset

30 detectors max

All alarm relays operate with single alarm

All horns/strobes operate with single alarm

10 detectors max

Normally
open reset
switch

Detector #1

12

12

12

12

12

12

+ RED

-

BLK

+ RED

-

BLK

+ RED

-

BLK

13

14

19

20

13

14

19

20

13

14

19

20

+ RED

-

BLK

+ RED

-

BLK

+ RED

Detector #2

Detector #30

Detector #1

Detector #2

Detector #10

Detector #1

Detector #2

Detector #30

Detector #1

Detector #2

Detector #30

20

H

H

H

H

H

H

MOUNTING

MODEL

DESCRIPTION

SL-2000-N

Ionization Duct Smoke Detector for 24 VAC, 24 VDC, 115 VAC, 230 VAC

SL-2000-P

Photoelectric Duct Smoke Detector for 24 VAC, 24 VDC, 115 VAC,  230 VAC

STN-2.5

Sampling Tube for 1.0' to 2.5' (0.3 to 0.7m) Duct Widths

STN-5.0

Sampling Tube for 2.5' to 5.0' (0.7 to 1.5m) Duct Widths 

STN-10.0

Sampling Tube for 5.0' to 10.0' (1.5 to 3m) Duct Widths 

WP-2000

NEMA Type 3R Enclosure 11.06" x 18.13" x 4.38" (28.1 x 46.0 x 11.2 cm)

55000-250APO

Replacement Ionization Smoke Detector Head Only

55000-350APO

Replacement Photoelectric Smoke Detector Head Only

ORDERING INFORMATION

WIRING

INTERCONNECTING WIRING

Mount the detector in an air duct using the provided template and
sheet metal screws. Detector should be mounted at least six
duct widths from the fan or other sources of turbulence with air-
flow from 100-4000 fpm (0.5-20.3 mps). The intake sampling
tube has holes drilled the entire length of the tube and should
extend the entire width of the duct, with the end opposite the
detector capped. The holes must be facing into the air flow (see
Figure 1 to the right). The exhaust tube is a piece of steel piping
approximately 7"Long (17.8 cm).

Intake Sampling Tube Lengths
Model

Duct Width

STN-2.5

1.0' to 2.5' (0.3 to 0.7m)

STN-5.0

2.5' to 5.0' (0.7 to 1.5m)

STN-10.0

5.0' to 10.0' (1.5 to 3m)

Important
For the correct installation, testing and maintenance of a duct
smoke detector, follow the instructions provided with the detec-
tor and refer to your locally enforced fire, mechanical, and/or
building codes. Please also review NFPA 72 (National Fire
Alarm Code) and NFPA 90A (Standard for Installation of Air
Condition and Ventilation Systems). Your local Authority Having
Jurisdiction (AHJ) should also be consulted.

Note: Sampling tubes over 3' (0.9m) must be supported on the

opposite side of the duct from the detector.

FIGURE 1. TYPICAL DUCT INSTALLATION

CAUTION: For terminals (7, 8, 18), (6, 16, 17), (13, 14) do not
use looped wire under terminals. Break wire run to provide
supervision of connections.

NOTE: When using detector interconnection functions, wire all
detectors to a common power source. Use of multiple power sources
for interconnected detectors may cause damage to the detectors
and/or may prevent the detectors from functioning properly.

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