Johnson Controls DSDN Bedienungsanleitung

Application Note DSDN

Issue Date May 21, 2003

Code No. LIT-1201602 www.johnsoncontrols.com

DSDN No Flow Duct Smoke Detector

Description

The DSDN No Flow Duct Smoke Detector is designed

for use with Johnson Controls® UL555S classified

smoke dampers. The device detects the presence of

smoke in the airstream of ductwork in Heating,

Ventilating, and Air Conditioning (HVAC) systems

without a minimum operating velocity.

Model: System Sensor® 2151

Type: Photoelectronic

Velocity: 0 to 3,000 fpm.

Dimensions (Dia.): 6.1 in.(155 mm)

Weight: 3.6 oz. (104 g).

Operating Temperature Range: 32° F to 120° F

(0° C to 49° C).

Operating Humidity Range: 10% to 93% Relative

Humidity.

Operating Voltages: 120 VAC operation.

Contact Ratings:

Form A: 2.0A @ 30 VAC/VDC,

Form C: 0.6A @ 110 VDC, 2.0A @ 30 VDC,

1.0A @ 125 VAC, 2.0A @ 20 VAC

Underwriter's Laboratories®, Inc. (UL) does not have a

separate Product Category for factory mounted smoke

detectors. The smoke detector and the damper have

been individually evaluated by their applicable UL

standards. The local authority having jurisdiction

should be consulted prior to installation of the damper

and smoke detector.

•UL Listed: file S911

•standard cubic feet/minute (scfm) Listing:

7272-1209:159

•New York: MEA-205-94-E

•Factory Mutual Approved: OX5A4.AY

Application

National and local safety standards and codes

recognize the ability of air duct systems to transfer

smoke, toxic gases, and flame from area to area.

Smoke can be a serious hazard to life safety unless

blowers are shut down and dampers are actuated.

The primary purpose of duct smoke detection is to

prevent injury, panic, and property damage by

reducing the spread of smoke. Duct smoke detection

can also serve to protect the air conditioning system

itself from fire and smoke damage, and can be used to

assist in equipment protection applications. When the

presence of smoke in the duct is sensed, or when loss

of power occurs, the damper will fail close.

Consult NFPA90A, NFPA72 documents and local

codes to determine where smoke detectors are

required. DSDN No Flow Duct Smoke Detectors are

factory mounted for single point field wiring

connection.

Maintenance and Service of Duct

Detectors

Dust, dirt, and other foreign matter can accumulate

inside a detector and change its sensitivity. Detectors

should be tested and maintained periodically. Routine

maintenance should be performed at least once a year

and more frequently in dirtier environments. Refer to

NFPA90A, NFPA72, and detector manufacturer's

instructions packaged with each detector for specific

maintenance and testing information.

2DSDN No Flow Duct Smoke Detector Application Note

DSDN

Airflow

0 to 3,000 fpm

Either Direction

Figure 1: DSDN

Factory Mounting Details

The minimum size for use with a DSDN detector is

8 in. wide x 8 in. high (203 mm x 203 mm).

Multiple detectors are required for dampers larger than

36 in. x 36 in. (914 mm x 914 mm).

Width

Height

Actuator and

Control Options

DSDN

Centered

Figure 2: Typical Location

Height

5 inches

(127 mm)

Airflow

0 to 3,000 fpm

Either Direction

Sleeve Length

Junction Box,

external mount actuator

Junction Box,

internal mount

actuator

Figure 3: Installation

Note: Refer to the Air Duct Smoke Detector

Installation and Maintenance Instructions for additional

information (shipped with each detector).

DSDN No Flow Duct Smoke Detector Application Note 3

Wiring Diagrams

Green

Black

White

Conduit from Motor

Factory connected

to junction box

Conduit from DSDN

Factory connected

to junction box

Black (factory wired)

White (factory wired)

Figure 4: DSDN Factory Wired with Smoke Dampers

Field wiring connections are to be made to the white, black, and green (ground) wires.

Green

Black

Brown

Black

White

EFL Located

Inside Box

Conduit from Motor

Factory connected

to junction box

Conduit from DSDN

Factory connected

to junction box

Black (factory wired)

White (factory wired)

Figure 5: DSDN Factory Wired with Electric Fuse Link (EFL) on Fire/Smoke Dampers

Field wiring connections are to be made to the white, black, and green (ground) wires.

4DSDN No Flow Duct Smoke Detector Application Note

Green

Black

Brown

Black

White

EFL Located

Inside Box

Conduit from Motor

Factory connected

to junction box

Conduit from DSDN

Factory connected

to junction box

Black (factory wired)

White (factory wired)

Blue Wires

To Switch 1 Ye ll ow W ir es

To Switch 2

Figure 6: DSDN Factory Wired with EFL/SP100 on Fire/Smoke Dampers

Field wiring connections are to be made to the white, black, and green (ground) wires.

Make switch connections to blue (S1) and yellow (S2)wires.

For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable

for damages resulting from misapplication or misuse of its products.

Controls Group

507 E. Michigan Street

P.O. Box 423 Published in U.S.A.

Milwaukee, WI 53201 www.johnsoncontrols.com

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