Dwyer Instruments SL-2000-P, SL-2000-N User manual

AIR PRODUCTS

AND

CONTROLS

AIR PRODUCTS AND CONTROLS INC.
INSTALLATION AND MAINTENANCE INSTRUCTIONS
FOR SL-2000 SERIES DUCT SMOKE DETECTORS

You in Control

SL-2000-N 4-Wire, Ionization Type
SL-2000-P 4-Wire, Photoelectric Type

PRODUCT OVERVIEW

PRODUCT APPLICATION

SL-2000 Series duct smoke detectors provide early detection of smoke
and products of combustion present in air moving through an HVAC
duct supply, return, or both in commercial, industrial, and residential
applications. These devices are designed to prevent the recirculation of
smoke in areas by the air handling system’s fans and blowers. Complete
systems may be shut down in the event of smoke detection.

NOTE: For the correct installation of a duct smoke unit, please refer to

!

Ì

the NFPA 72 (National Fire Alarm Code), NFPA 90A (Standard for Installation of
Air Conditioning and Ventilation Systems), NFPA 92A (Recommended Practice for
Smoke Control Systems.), NFPA 5000 (Building Construction and Safety Code),
IMC (International Mechanical Code), and IFC (International Fire Code).

This detector is not intended for open area protection nor should it be used for
early warning detection or replace a regular fire detection system.

PRODUCT DESCRIPTION

The SL-2000 Series smoke detector is fitted with a mounting base that
will accept an ionization smoke detector head model 55000-225APO or
photoelectric smoke detector head model 55000-328APO. The duct
unit supports two sets of form “C” alarm contacts, one form “A” alarm
contact and one form “C” trouble contact. The trouble contact supervises
the presence of the input power, removal of the detector cover and the
removal of the smoke detector head.

To minimize the impact of air turbulence and stratification on performance,
a duct smoke detector should be located as far as possible downstream
from any obstruction (i.e. deflector plates, elbows, dampers, etc.). In
all situations, confirmation of velocity and pressure differential within
specifications is required.

REMOTE ACCESSORIES

Audible and visual alarm indicators, remote status indicators, and remote
reset/test switches can be accommodated by the SL-2000 Series duct
units by connecting to DC voltage output terminals as described on
Page 4. These terminals are not supervised and the voltage/current will
only be present when the detector unit is in alarm. The remote pilot
(green) LED will be permanently illuminated when connected to the
output terminals as long as input power and detector head are present.

SL-2000 AT-A-GLANCE

MODEL NUMBER:

SL-2000-N 4-Wire Ionization Duct Smoke Detector
SL-2000-P 4-Wire Photoelectric Duct Smoke Detector

This detector is equipped with a cover removal switch

!

Ì

that instantly provides a trouble condition upon removal of
the clear cover. For all testing and inspection with the cover
removed, the cover removal switch (designated as SW1 on
PCB) must be manually depressed to simulate standard “pilot”
operation. THE TROUBLE CONTACTS (TERMINALS 4, 15,

5) ARE SHOWN IN THE NON-ENERGIZED CONDITION.

The trouble contacts will not operate in the event of a smoke alarm.
The SL-2000 Series duct detector will operate from various input
voltage sources; namely 24VAC, 24VDC, 115VAC and 230VAC.

SAMPLING TUBES

The operating principle of a duct detector is based on the Venturi effect.
Two tubes extend into the HVAC duct. Air flowing through the duct is
forced into the air intake (inlet) tube via the air intake holes, (facing the
airflow) and passes over the detector head. The air will be drawn out via
the exhaust tube back into the HVAC duct. (A 7” exhaust tube is provided
in the installation kit.) When the concentration of smoke particles
suspended in the air stream reach the alarm threshold of the detector
head, the unit will go into alarm.

The duct smoke detector units are designed to operate in duct widths
from 6” to 10’ wide with an air velocity between 100 to 4,000 feet per
minute. To verify correct installation, the pressure differential between the
sampling (high side) and exhaust (low side) tubes should be measured using a
Magnehelic pressure gauge or equivalent. An acceptable reading is between

0.01 and 1.2 inches of water.

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DETECTOR HEAD MODEL NUMBER:
Ionization Detector Head: 55000-225APO
Photoelectric Detector Head: 55000-328APO

POWER STANDBY CURRENT ALARM CURRENT

WITH
ACCESSORIES

24VAC 55.0mA 95.0mA 190.0mA 280.0mA
24VDC 14.0mA 32.0mA 68.0mA 165.0mA
115VAC 22.0mA 25.0mA 32.0mA 50mA
230VAC 14.0mA 14.0mA 18.0mA 30.0mA

RELAY CONTACT RATINGS:

Alarm contacts: 2 Sets form “C” rated at 10A @ 115VAC resistive
1 form “A” rated at 2A
Trouble contacts: 1 Set form “C” rated at 10A @ 115VAC resistive
Air velocity: 100 to 4,000ft/min.
Ambient temperature: SL-2000-N: 32°F to 158°F (0°C to 70°C)
SL-2000-P: 32°F to 140°F (0°C to 60°C)
Humidity: 10% to 85% RH Non-Condensing/Non-Freezing
Material: Gray plastic back box with clear plastic cover
(Makrolon 94V-0)
Dimensions: 13½” L X 4½” W X 2¼” D
Max. net wt.: 3½ lbs.
Radioactive element: SL-2000-N (Ionization) - Americium 241,

0.9 micro curie.

Do not expose to corrosive atmospheres.

U.S. Patents 6,741,181; 7,204,522; 6.124.795

1

INST APD0194 K140417

WITH
ACCESSORIES

MECHANICAL INSTALLATION

LOCATION PREREQUISITES

This guideline contains general information on duct smoke detector
installation, but does not preclude the NFPA and/or ICC documents
listed. Air Products and Controls assumes no responsibility for
improperly installed duct detectors. To determine the correct
installation position for an SL-2000 Series duct smoke detector, the
following factors must be considered.

1. A uniform non-turbulent (laminar) airflow between 100 ft/min. to
4,000 ft/min. must be present in the HVAC duct. To determine duct
velocities, examine the engineering specifications that define the
expected velocities or use an Alnor model 6000AP velocity meter
(or equivalent).

2. To minimize the impact of air turbulence and stratification on
performance, a duct smoke detector should be located as far
as possible downstream from any obstruction (i.e. deflector plates,
elbows, dampers, etc.). In all situations, confirmation of velocity and
pressure differential within specifications is required.

“NO-TOOLS” TUBE INSTALLATION

The SL-2000 Series duct smoke detector provides a unique, patented
mechanism for installation and/or removal of the sampling and exhaust
tubes from either the front or rear of the detector housing.

Once the airflow direction has been determined, insert the inlet and
exhaust tubes into the duct smoke detector. If the cover is in place, the
tubes may be inserted into the back of the detector via the key-slots
provided. Simply push the tube into place against the spring loaded
retainer, and turn into the correct position, allowing the key to “lock”
the tube in the desired orientation. For front side installation, simply
rotate the tube retainer until the tube may be inserted and oriented
properly. Once the tube is installed, rotate the retainer back into place
to lock down the tube. Ensure air intake sampling tube is positioned so
that the inlet holes (or FAST Tube slot) are directly facing the airflow.

The pressure differential between the input sampling (high pressure)
tube and exhaust (low pressure) tube for the SL-2000 Series smoke
duct detector should be greater than 0.01 inches of water and less
than 1.2 inches of water.

3. Identify a code compliant location (supply or return side,
or both) for the installation of the duct unit that will permit
easy access for viewing and serviceability.

4. When installing on the return side, install duct units prior
to the air being exhausted from the building or diluted with
outside “fresh” air.

5. When installing duct smoke units downstream of filters, fires
occurring in the filters will be detected, but if the filters become
blocked, insufficient air flow through the duct unit will prevent the
correct operation of the duct detector. Duct units installed in the
supply air side may monitor upstream equipment and/or filters.

6. Where possible, install duct detectors upstream of air humidifiers
and downstream of dehumidifiers.

7. To prevent false alarms, the duct detector should not be mounted
in areas of extreme high or low temperatures, in areas where high
humidity exists, or in areas where the duct may contain gases or
excessive dust.

SAMPLING TUBE ASSEMBLY

The SL-2000 Series duct smoke detectors employ a specially
notched sampling tube, which must be ordered separately in one
of four standard lengths or packaged as FAST Tubes.

STN-1.0 For duct widths of 6” TO 1.0’
STN-2.5 For duct widths of 1.0’ TO 3.0’
STN-5.0 For duct widths of 3.0’ TO 5.0’
STN-10.0 For duct widths of 5.0’ TO 10.0’
FAST TUBE Sectional tube for duct widths up to 8.0’

Standard sampling tubes are steel tubes with air intake holes drilled
the entire length of the tube. FAST Tubes are a recognized plastic with
an open slot along the length. These tubes can be cut to length and
must span at least 80% of the duct width (spanning the entire width is
suggested). Sampling tubes over 3ft must be supported on the opposite
side of the duct. To ensure correct operation of the sampling tube, the
red end cap (red stopper in installation kit) must be inserted in the end
of the air intake. For custom duct widths, always use the next longest
standard size and cut down to the exact requirement.

Tube Support Hole only for Ducts Greater than 3 Feet Wide

DUCT WIDTH

INSERT RED STOPPER
THIS END OF INLET TUBE

INLET TUBE
HOLES FACE
AIR FLOW

NOTE: Mountings shown
are typical. Detectors can
be installed side, bottom
or top of duct as long as
proper tube operation and
flow/pressure performance
is maintained

AIR FLOW DIRECTION

EXHAUST TUBE INSTALLED
DOWNSTREAM OF AIRFLOW
DO NOT INSERT RED STOPPER

DUCT PREPARATION

Remove mounting template from the installation kit. Remove paper
backing from the mounting template and affix it to the duct at the
desired location. Using the template as a guide, drill (2) mounting holes,
3/32” (2.5mm) for the #12 X ” sheet metal screws packaged in the
installation kit. Drill or punch (2) 1 ” (32mm) holes for inlet sampling
and exhaust tubes, using the template as a guide. Clean all holes.

MOUNTING

After securing the sampling and exhaust tubes to the duct smoke unit,
(or initially placing the tubes through the 1 ” holes drilled or punched
in the HVAC duct to accept the inlet sampling and exhaust tubes and
then attaching them to the duct unit), hold the duct unit assembly in
position and use (2) # 12 X ” sheet metal screws (packaged in the
installation kit) to secure the duct smoke detector to the HVAC duct
sheet metal.

AIR SAMPLING VERIFICATION

To ensure correct operation of the duct unit use a Magnehelic
differential pressure gauge, Dwyer 2000 or 4000 Series (or equivalent)
to determine the differential pressure between the inlet (high side)
and exhaust (low side) tubes. The differential pressure between the
two tubes should be greater than 0.01 inches of water and less than

1.2 inches of water.

2

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INST APD0194 K140417

AIR SAMPLING VERIFICATION (CONT’D)

This duct smoke detector is shipped with a velocity adapter insert, either factory installed (SL-2000-P), or found in the installation kit (SL-2000-N).
When installed, this adapter will allow the duct detector to operate at extremely low air velocities. To install the adapter, simply insert it into the slots
provided inside the detector housing so that the adapter fits snugly over the smoke detector head. Unless your system is consistently operating in the
slower velocity range (where the adapter is specifically required, SL-2000-N), we recommend that the adapter not be inserted. If you experience false
alarms at higher velocities with the adapter in place, the adapter should be removed. Please use the following chart for guidance on when the velocity
adapter should be used. For reference, the speeds indicated are intended to represent the velocity of air within the duct under normal operational
conditions.

100 ft/min 300 ft/min 500 ft/min 1,000 ft/min 2,000 ft/min 3,000 ft/min 4,000 ft/min

SL-2000-N

UL Listed with insert installed (100-2,000 ft/min)

SL-2000-P

UL Listed without insert installed (300-4,000 ft/min)

UL Listed without insert installed (1,000-4,000 ft/min)

UL Listed with insert installed (100-4,000 ft/min)

ELECTRICAL INSTALLATION

TERMINAL AND POWER CONNECTIONS

Prior to connecting input power to the duct unit, determine the correct input voltage/ current availability and ensure it is connected to the correct
terminals.

115VAC

10A
*TROUBLE
CONTACT

NC

RESET INPUT

(+) PILOT OUT

24 VDC COM (-)

1

234 567 8

NO

C

10A

ALARM

CONTACT

NO

NC

C

*TROUBLE CONTACTS

ARE SHOWN IN
NON-ENERGIZED
CONDITION. UNDER
NORMAL OPERATION
CONTACTS WILL BE
HELD REVERSED.

24VAC

*

50/60Hz

0.2A MAX.

10

9

24VAC

OPERATION

*

50/60Hz

0.1A MAX.

GND

220

G

115VAC

OPERATION

N

115

H

H

230VAC

*

50/60Hz

11

AL (+)

12 13 14 15 16 17 18 19

L

(+)

ALARM

LINK

C

NO

2A

FACP

ALARM

CONTACT

C

NC

NO

10A

ALARM

CONTACT

20

(-) (+)

AUX

POWER

OUT

24VDC

*

0.1A MAX.

(+)

(-)

10

9

24VDC

OPERATION

NOTE: Choose only one source of operating voltage

WIRING

CAUTION: Do not use looped wire under terminals. Break wire run to provide for proper supervision of connections.

!

Ì

MISE EN GARDE: Ne pas enrouler le fil sous les bornes. Pour assurer la supervision electrique des raccordements, il faut couper les fils.

With detector head removed, connect one of the appropriate dedicated power sources to the applicable terminals (see above). Replace detector head
and depress the cover removal switch (SW1) and the unit will be energized. The green pilot LED will be illuminated, and when pressing the test/reset
button (SW2), the red alarm LED will be illuminated. This test confirms the correct basic operation of the duct smoke unit, excluding the detector head
(see functional testing).

In the event of a fire alarm, certain equipment may be required to be shut down. For example, shut down may be achieved by interrupting the fan supply
source to that particular piece of equipment when wired as indicated on Page 4.

*

0.1A MAX.

GND

H1

220

G

230VAC

OPERATION

115

H2

H

3

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INST APD0194 K140417

AC/+ /H
AC/- /N

DEDICATED INPUT VOLTAGE

FAN SUPPLY SOURCE

WIRING EXAMPLE

9 10

G

or

115

H

24VAC/VDC

115VAC

7

18

NC C NO

ALARM RELAY

8

FIRE ALARM CONTROL PANEL WIRING

SAMPLE CONTROL PANEL WIRING - STYLE “D” / CLASS “A” IDC (Supervised - A fault condition will not inhibit an alarm response)

SL-2000

Detector #X

15

14

15

14

5

UL Listed

Conventional

Fire Alarm

Control Panel

SAMPLE CONTROL PANEL WIRING - STYLE “B” / CLASS “B” IDC (Supervised - A fault condition will not inhibit an alarm response)

UL Listed

Conventional

Fire Alarm

Control Panel

13

SL-2000 Detector

5

13

SL-2000 Detector

15

14

#1

15

14

#1

13

5

13

SL-2000

Detector #X

5

In alarm 7 and 18 will
open, interrupting
voltage supply to fan

EOL

End

of

Line

MSR REMOTE ACCESSORY WIRING

C+

T/R

P+

AL+

C-

20

1

2

11

19

CONNECTIONS SHOWN FOR

ALL POSSIBLE TERMINAL

STYLE CONFIGURATIONS.

CONNECT ONLY THOSE

TERMINALS AVAILABLE ON

THE MSR REMOTE ACCESSORY

CONTROL ASSEMBLY.

MS REMOTE ACCESSORY WIRING

BUZZER

TROUBLE

CONTACTS

CANNOT BE

CONNECTED TO

FIRE PANEL
WHEN USING
THIS OPTION

WITHOUT THE

USE OF A

SLAVE RELAY

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INTERCONNECTION WIRING FOR COMMON FUNCTIONS

NOTE: A common power supply must be used for all interconnected detectors.

*

Common Test/Reset

(Use normally open test/reset switch)

30 detectors max.

Adding Individual Horn/Strobes

13

14

13

14

13

14

4

Common Alarm Shutdown

Adding Common Alarm Horn/Strobes

INST APD0194 K140417

TESTING AND MAINTENANCE PROCEDURES

OPERATIONAL TESTING

To determine the correct operation of the SL-2000 Series duct smoke
detector, ensure input power is connected and the green pilot LED is
illuminated.

The LED on the detector head of both the ionization and photoelectric
models will flash while the unit is in standby mode. The LED on the smoke
detector head will be permanently illuminated when smoke is detected and
the head is in alarm.

Above: The LED will be permanently illuminated when the unit is in alarm.

!

CAUTION: DO NOT SPRAY GAS FOR MORE THAN ½

Ì

SECOND. TEST GAS FACILITY MAY RESULT IN DETECTOR
CONTAMINATION.

MISE EN GARDE: NE VAPORISEZ PAS DE GAZ POUR

!

Ì

PLUS DE ½ SECONDE. SURUTILISATION DES GAZ DE TEST
INSTALLATION PEUT ENTRAÎNER LA CONTAMINATION
DU DÉTECTEUR.

After 15 to 20 seconds the detector head will go into alarm, illuminating the
detector head LED and causing the duct unit functions to operate, alarm
relays will change state, and the alarm related remote accessories, if attached,
will function.

If no test gas is available to conduct functional testing, remove cover and,
while holding down the cover removal switch, blow smoke from a cotton
wick or punk directly at the head to cause an alarm. The alarm indicator
should illuminate within one minute.

Should additional testing also be required for simulated fire conditions, smoke
bombs placed in the duct may not be suited for the particular detector head
(photoelectric or ionization) selected and installed. Consult the smoke bomb
data for proper use and compatibility with detector type.

The S65A ionization detector head (55000-225APO) utilizes a radioactive
source as its means of detection and will detect smoke particles of between
.1 and 1 micron in size.

With the air handling unit shut down (not connected), and the clear cover
removed, press and hold the test/reset button and the cover removal switch
on the SL-2000. The red alarm LED on the circuit board will be illuminated
and the alarm relay outputs will change state. Using a multimeter set to
OHMS (or continuity buzzer function on the meter) place the meter probes
on the following terminals, and ensure the contacts are closed (continuity)
(8-18) and (6-17). When releasing the test/reset button these contacts will
open.

The trouble contacts (4,15,5) on the SL-2000 detector will not change state
in the event of a fire alarm, operational, or functional testing. The trouble
contacts can be tested by either releasing the cover removal switch, or
depressing the cover removal switch after rotating the smoke detector
head counter-clockwise and removing the detector head. This action will
extinguish the green pilot LED and cause the trouble contacts to change state,
(4-15) will be closed (continuity) and (5-15) will be open circuit. Replacing
the detector head and rotating it clockwise until it locks, will cause the green
pilot LED to be illuminated and the unit will be operational, terminals (4-15)
will be an open circuit and (5-15) will be closed (continuity).

FUNCTIONAL TESTING

Once operational testing is concluded the unit requires functional testing to
determine the correct operation of the detector head.

MAGNET TESTING: Place the magnet provided with the installation kit
on top of the housing between the raised sections above the detector head
(as indicated by the arrows on the unit cover). Allow at least five seconds for
alarm initiation. Remove magnet and reset detector.

The S65A photoelectric detector head (55000-328APO) operates on the
principle of light scatter and will detect smoke particles of between 1 and 10
microns in size.

When purchasing smoke bombs for additional required functional testing,
ensure smoke particle sizes comply with the criteria as described above.

NOTE: In situations that require a duct smoke detector to be held in an
alarm condition for an extended period of time, the magnet test or smoke test
methods should be used to ensure the detector is locked into alarm.

MAINTENANCE

Each installation location must be assessed on its own merits. If the
protected area is of a very dirty nature then the SL-2000 Duct unit(s) will
have to be checked and cleaned on a quarterly basis or when cleaning is
required.

As a guideline the smoke detector head should be cleaned every six
months or as required. The best methods of cleaning are to vacuum the
detector head thoroughly or to blow the detector head out using clean,
dry compressed air.

Do not use chemicals or non-conforming air to clean the detector head
housing as this could contaminate the detector head and damage the casing.

Sensing tubes must be inspected and cleaned in accordance with the
schedule as determined above, to allow the free flow of air through both
inlet and exhaust tubes.

SMOKE TESTING: Using smoke test canister with testing nozzle (available
from Air Products and Controls Inc. part number TG-2000), insert the test gas
nozzle into the test port on the unit cover. Press can against cover to release
gas into the chamber.

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Consult your local code and AHJ requirements for required maintenance
schedules.

5

INST APD0194 K140417

SL-2000 SERIES

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You in Control

AIR PRODUCTS

AND

CONTROLS

INSTRUCTIONS

ANSI APPROVED / UL LISTED to the 268A Standard

for Smoke Detectors for Duct Application:

UROX, UROX7, File No S2829

SL-2000-N Ionization Type, 4-Wire Duct Smoke Detector

SL-2000-P Photoelectric Type, 4-Wire Duct Smoke Detector

INSTALLATION AND MAINTENANCE

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NOTICE: The information contained in this document is the most current available at the time of shipment of accompanying product, and is subject to

change without notice. Future references should always be made to the most current revision of this document. The information contained in all this

document should be considered before installing or using the product. Any example applications shown are subject to the most current enforced local/

national codes, standards, approvals, certifications, and/or the authority having jurisdiction. All of these resources, as well as the specific manufacturer

of any shown or mentioned related equipment, should be consulted prior to any implementation. For further information or assistance concerning this

product, contact Air Products and Controls Inc. Air Products and Controls Inc. reserves the right to change any and all documentation without notice.

© Air Products and Controls Inc. 2009

UNTIL INSTALLATION BY ALL TRADES IS FULLY COMPLETE.

FOR TECHNICAL SUPPORT CALL 888-332-2241 OR 248-332-3900

A COPY OF THESE INSTRUCTIONS SHOULD BE LEFT WITH THE EQUIPMENT

FOLLOWING FINAL INSPECTION, A COPY SHOULD BE LEFT WITH THE OWNER/USER.

You in Control

AIR PRODUCTS

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SL-2000 SERIES DUCT SMOKE DETECTORS

AVAILABLE ACCESSORIES FOR USE WITH

MS-RA Remote Alarm

MS-RA/R Alarm, push button Test/Reset Switch

MSR- SERIES REMOTE ACCESSORIES

MSR-100R Series Features Visual Indicators: $ODUP3LORW7URXEOH%X]]HU3URJUDPPDEOH

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2SHUDWHG/('%X]]HU7HVW3XVK%XWWRQ2SHUDWHG

MSR-50RM Series Features Magnet Test, Pushbutton Reset, Visual Pilot, Trouble, Alarm LED

MSR-50RK Series )HDWXUH.H\7HVW5HVHWZLWK9LVXDO3LORW7URXEOH$ODUP/('

MSR-AV Series Features plug-in combination Strobe (Visual) and Sounder (AMSR-50SA Series

Features plug-in combination Strobe (Visual) and Sounder (Audible)

MS-SERIES REMOTE ACCESSORIES

MS-RA/P/R Remote Alarm, Pilot, push-button Test/Reset Switch

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MS-RA/P Remote Alarm, Pilot

MS-RH Remote Alarm Horn

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MS-RH/P/A Remote Alarm, Pilot, Horn

6

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MS-RA/P/T Remote Pilot, Trouble

MS-RA/FT/P Remote Pilot, Trouble, push-button Test/Reset Switch

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MS-RD Remote Alarm

MS-F/T Remote Trouble

TG-2000 Solo Aerosol Test Gas with Nozzle for Test Port

SMOKE TEST GAS

STN-1.0 For duct widths of 6” to 1.0’

SAMPLING TUBES

STN-2.5 For duct widths of 1.0’ to 3.0’

STN-5.0 For duct widths of 3.0’ to 5.0’

STN-10.0 For duct widths of 5.0’ to 10.0’

FAST Tube Sectional Tube for Duct Widths up to 8ft

55000-225APO S65A Ionization Detector Replacement Head

55000-328APO S65A Photoelectric Detector Replacement Head

POWER SUPPLIES

REPLACEMENT SMOKE DETECTOR HEADS

INST APD0194 K140417

T-PB 202-1 24VAC @ 4.0A Class I Power Supply

T-PB 202-0 24VAC @ 4.0A Class I Power Supply

T-PB 303-1 24VAC @ 3.0A Class II Power Supply

T-PB 303-0 24VAC @ 3.0A Class II Power Supply