400 Series™
4-Wire Duct
Smoke Detector
A Division of Pittway
3825 Ohio Avenue, St. Charles, IL 60174
1-800-SENSOR2 (736-7672), Fax 630-377-6495
http://www.systemsensor.com
Models Available
DH400ACDCI Ionization Duct Smoke Detector
DH400ACDCA Ionization Detector, ULC Listed
DH400ACDCP Photoelectronic Duct Smoke Detector
Features
•
•
•
•
•
•
•
•
•
•
•
24 VAC/DC or 120/220 VAC operation
Simple change-out of photo or ion detector heads
Air velocity rating from 500 to 4000 FPM
Powered outputs for remote LED and sounder
Remote test station option
Remote sounder option
Equipped with a DPDT auxiliary relay (two Form C
contacts)
Easy and quick mounting to round or rectangular ducts
from 1′ – 12′ wide
Clear cover for convenient visual inspection
UL 268A listed
3-year warranty
System Sensor DH400ACDC 4-wire duct housing will
accommodate either the 1451DH ionization sensor or the
2451 photoelectronic sensor. The twist-in, twist-out
detector heads allow easy removal for quick cleaning and
maintenance, or a change in application without removing
the duct housing. The DH400ACDC samples air currents
passing through a duct and gives dependable performance
for management of fans, blowers, and air conditioning
systems.
WARNING: Duct smoke detectors have specific limitations.
DUCT DETECTORS ARE:
NOT a substitute for an open area smoke detector,
NOT a substitute for early warning detection, and
NOT a replacement for a building’s regular fire
detection system.
Refer to NFPA 72 and 90A for additional duct detector
application information.
Specifications
Length:
Width:
Depth:
Weight:
Operating
Temperature Range:
14.5 inches (37 cm.)
5 inches (12.7 cm.)
4 inches (10.2 cm.)
4.5 lbs. (2.0 kg.)
Operating
Humidity Range:
Air Duct Velocity:
10% to 93% relative humidity
500 to 4000 ft./min.
32° to 120°F (0° to 49°C)
APPROVED
© System Sensor 8/96
This document is not intended to be used for installation purposes.
A05-201-02
Architectural/Engineering Specifications
The air duct smoke detector shall be a System Sensor
Model DH400ACDC Series Duct Smoke Detector. The
detector housing shall be UL listed per UL 268A
specifically for use in air handling systems. The detector
shall operate at air velocities of 500 feet per minute to
4000 feet per minute. The detector housing shall be
equipped with an integral mounting base capable of
accommodating either photoelectronic or ionization
detector heads. It shall be capable of local testing via
magnetic switch or remote testing using the RTS451KEY
Remote Test Station. The duct detector housing shall
incorporate an airtight smoke chamber in compliance with
UL 268A, Standard for Smoke Detectors for Duct
Applications. The housing shall be capable of mounting to
either rectangular or round ducts without adapter
brackets. An integral filter system shall be included to
reduce dust and residue effects on detector and housing,
thereby reducing maintenance and servicing. Sampling
tubes shall be installed after the housing is mounted to the
duct by passing through the duct housing. Terminal
connections shall be of the strip and clamp method
suitable for 14–18 AWG wiring.
DUCT DETECTOR
HOUSING
CONDUIT HOLES
INLET SAMPLING TUBE
(SUPPLIED SEPARATELY)
FOAM
GASKETS
TUBE
END
PLUG
PC BOARD
INSULATOR
DUCT DETECTOR
COVER
SAMPLING TUBE
MOUNTING
SCREWS
O-RINGS
DETECTOR BASE
HOUSING
MOUNTING SCREWS
EXHAUST
FILTER ADAPTER
DETECTOR HEAD
Exploded View of
DH400ACDC Duct
Detector Components
TEST MAGNET
SAMPLING TUBE
FILTERS
Electrical Ratings – DH400ACDC
Power Supply Voltage
20 - 29 VDC
24 VAC 50 - 60 Hz
120 VAC 50 - 60 Hz
220/240 VAC 50 - 60 Hz
CURRENT REQUIREMENTS (USING NO ACCESSORIES)
Max. standby current
25 mA
35 mA RMS
20 mA RMS
20 mA RMS
Max. alarm current
95 mA
55 mA RMS
55 mA RMS
30 mA RMS
CONTACT RATINGS
Alarm initiation contacts (SPST)
2.0A @ 30 VAC/DC (0.6 power factor)
Alarm auxiliary contacts (DPDT)
10A @ 30 VDC
10A @ 277 VAC (0.75 power factor)
240 VA @ 240 VAC (0.4 power factor)
1/8 HP @ 120 VAC
1/4 HP @ 240 VAC
ACCESSORY CURRENT LOADS AT 24 VDC
ALARM
STANDBY
DEVICE
APA451
12mA MAX
30mA MAX
PA400
0mA
15mA MAX
RA400Z
0mA
7mA MAX
RTS451KEY
0mA*
7mA MAX*
ANY COMBINATION OF ACCESSORIES MAY BE
USED SUCH THAT THE GIVEN CURRENT LOADS TOTAL:
100mA OR LESS IN THE STANDBY STATE,
150mA OR LESS IN THE ALARM STATE.
Trouble contacts (SPST)
Page 2
0.3A @ 32 VDC (resistive)
*NOTE: WHEN INITIATING AN ALARM, THE RTS451
REQUIRES 71mA MAXIMUM IN PRE-ALARM
AND 78mA MAXIMUM IN ALARM. NOMINAL
STANDBY CURRENT IS 0mA. ALARM CURRENT
IS 7mA MAXIMUM WHEN TEST MAGNET IS
REMOVED.
A05-201-02
DH400ACDC Wiring Guide
AVAILABLE POWER INPUTS
AVAILABLE POWER INPUTS
1
2
12
13
1
14
120
VAC
24V
2
12
13
120
VAC
24V
220/240
VAC
220/240
VAC
15
N.C.
ALARM AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC.
18
19
16
17
C.
N.O.
N.O.
ALARM AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC.
15
20
C.
N.C.
N.C.
16
C.
10
N.O.
19
20
C.
FOR WIRING OF AUXILIARY
DEVICES, REFER TO
MANUFACTURER'S
INSTALLATION INSTRUCTIONS
OR CONTACT MANUFACTURER.
N.C.
10
TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY.
CONTACTS OPEN WHILE DETECTOR HEAD OR POWER IS
REMOVED, AND DURING RESET. OPEN CONTACTS
SIGNAL TROUBLE CONDITION TO PANEL.
8
8
ALARM
INITIATION
CONTACTS
CONTACTS SHOWN
OPEN IN STANDBY.
CONTACTS CLOSE
IN ALARM.
CONTACTS SHOWN
OPEN IN STANDBY.
CONTACTS CLOSE
IN ALARM.
9
9
UL LISTED FIRE ALARM
CONTROL PANEL
N.O.
11
TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY.
CONTACTS OPEN WHILE DETECTOR HEAD OR POWER IS
REMOVED, AND DURING RESET. OPEN CONTACTS
SIGNAL TROUBLE CONDITION TO PANEL.
ALARM
INITIATION
CONTACTS
18
TROUBLE CONTACTS
TROUBLE CONTACTS
ALARM
INITIATION
LOOP
17
ALARM AUXILIARY CONTACTS SHOWN IN
STANDBY. CONTACTS TRANSFER DURING
ALARM AS INDICATED BY THE ARROWS.
ALARM AUXILIARY CONTACTS SHOWN IN
STANDBY. CONTACTS TRANSFER DURING
ALARM AS INDICATED BY THE ARROWS.
11
CONNECT POWER SOURCE
TO APPROPRIATE TERMINALS
OF EACH DETECTOR. SEE
SPECIFICATIONS FOR
ADDITIONAL POWER SUPPLY
INFORMATION.
14
EOL RESISTOR
SPECIFIED BY
PANEL MANUFACTURER
LAST DETECTOR IN THE LOOP
DH400ACDC
FIRST DETECTOR IN THE LOOP
DH400ACDC
System Wiring Diagram
for DH400ACDC 4-Wire
Duct Smoke Detectors
Using a UL Listed Control
Panel
CAUTION: Do not loop wire under terminals.
Break wire run to provide supervision of connections.
AVAILABLE POWER INPUTS
1
2
SEE SPECIFICATIONS FOR
ADDITIONAL POWER
SUPPLY INFORMATION.
12
13
14
120
VAC
24V
220/240
VAC
ALARM AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC.
15
FOR WIRING OF AUXILIARY
DEVICES, REFER TO
MANUFACTURER’S
INSTALLATION INSTRUCTIONS
OR CONTACT MANUFACTURER.
16
N.C.
C.
17
18
N.O.
19
N.O.
20
C.
N.C.
ALARM AUXILIARY CONTACTS SHOWN IN
STANDBY. CONTACTS TRANSFER DURING
ALARM AS INDICATED BY THE ARROWS.
ALARM INITIATION CONTACTS
8
9
N.O.
TROUBLE CONTACTS CLOSED IN ALARM AND STANDBY.
CONTACTS OPEN WHILE DETECTOR HEAD OR POWER IS
REMOVED, AND DURING RESET. OPEN CONTACTS
SIGNAL TROUBLE CONDITION TO PANEL.
2
1
ALARM
5
COMMON
6
(+) ALARM SIGNAL
(–) AUX POWER
A78-2353-00
3
Wiring Diagram for
DH400ACDC 4-Wire Duct
Detector System Equipped
Without a Control Panel
5
(+)
ALARM SIGNAL (+)
AUX POWER (–)
1
ALARM (+)
SIGNAL
5
1
6
2
AUX POWER (–) 6
2
4
RESET (–)
3
3
RESET
TEST (–)
4
5
TEST
AUX POWER (–)
6
DUCT DETECTOR
DH400ACDC
(–)
4
RA400Z (OPTIONAL)
REMOTE (LED)
ANNUNCIATOR
3
RESET (–)
5
(+)
AUX POWER (–)
6
DUCT DETECTOR
DH400ACDC
Page 3
4
TEST (–)
ALARM SIGNAL (+)
(–)
PA400 (OPTIONAL)
AUDIBLE ALERT
DUCT DETECTOR
DH400ACDC
FIELD
INSTALLED
JUMPER
3
RESET
5 TEST
RTS451
(OPTIONAL)
REMOTE TEST
STATION
FIELD
INSTALLED
JUMPER
10
POWER
11
APA451
AUDIBLE PIEZO ALERT WITH ALARM AND
POWER (TROUBLE) LEDS. FOR STAND ALONE
APPLICATIONS ONLY. APA451 RECOMMENDED
FOR COMPLIANCE TO NFPA 90A. LOCATE IN
NORMALLY OCCUPIED AREA OF PREMISES.
5
ALARM SIGNAL (+)
7
(+) AUX POWER
TROUBLE
CONTACTS
DH400ACDC
DUCT DETECTOR
SUPERVISORY 11
CONTACTS
10
{
AUX POWER (+) 7
DH400ACDC
Duct Smoke Detector
6
RTS451KEY
Remote Test Station
Wiring Diagrams for
Optional Accessories
A05-201-02
Ordering Information
Part No.
DH400ACDCI
DH400ACDCA
DH400ACDCP
1451DH
2451
Accessories
ST-1.5
ST-3
ST-5
ST-10
APA451
RTS451
Description
4-wire ionization duct detector
Same as above, Canadian model
4-wire photoelectronic duct detector
Replacement ionization sensor head
Replacement photoelectronic sensor head
Metal sampling tube duct widths 1′–2′
Metal sampling tube duct widths 2′–4′
Metal sampling tube duct widths 4′–8′
Metal sampling tube duct widths 8′–12′
Annunciator with piezo alarm and power LEDs
(see below)
Remote test station
RTS451KEY
MOD400R
PA400
RA400Z
CRT400
F36-05-00
M02-04-00
P48-21-00
RS14
RS24
R59-18-00
A2650-01
Remote test station with key (see below)
Sensitivity test module
Piezo sounder
Remote annunciator alarm LED
Ion cover removal tool
Replacement air filters (two per package)
Test magnet
End cap for metal sampling tubes
Ion replacement screen
Photo replacement screen
Calibrated test card (for photo units only)
Replacement installation kit (mounting
hardware)
APA451 Annunciator with
Piezo Alarm and Power LEDs
RTS451 Remote Test Station
System Sensor Worldwide Distribution
In Canada:
System Sensor Canada
6581 Kitimat Road, Unit #7
Mississauga, Ontario
Canada L5N 3T5
Telephone: 905-812-0767
Fax: 905-812-0771
Page 4
In the United Kingdom:
System Sensor Europe, Ltd.
Horsham Gates III, North St.
Horsham, West Sussex
RH13 5PJ, United Kingdom
Telephone: 44-1403-276500
Fax: 44-1403-276501
In India:
System Sensor India
A-204 Maheshwari Nagar
Orkay Mills Lane
Andheri East, Mumbai 400093
Telefax: 91-022-8202564
In the Far East:
System Sensor
Pittway Far East, Ltd.
Suite 706, New T&T Centre
7 Canton Road
Tsimshatsui, Kowloon, Hong Kong
Telephone: 852-2730-9090
Fax: 852-2736-6580
A05-201-02