INST APD0194 I090317

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

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

PRODUCT OVERVIEWPRODUCT APPLICATIONSL-2000 Series duct smoke detectors provide early detection ofsmoke and products of combustion present in air moving through anHVAC duct supply, return, or both in commercial, industrial, andresidential applications. These devices are designed to prevent therecirculation of smoke in areas by the air handling system’s fans andblowers. Complete systems may be shut down in the event ofsmoke detection.

* NOTE: For the correct installation of a duct smoke unit, pleaserefer to the NFPA 72 (National Fire Alarm Code), NFPA 90A(Standard for Installation of Air Conditioning and VentilationSystems),NFPA 92A (Recommended Practice for Smoke ControlSystems.), NFPA 5000 (Building Construction and Safety Code),IMC (International Mechanical Code), and IFC (International FireCode).

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

PRODUCT DESCRIPTIONThe SL-2000 Series smoke detector is fitted with a mounting basethat 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. Thetrouble contact supervises the presence of the input power, removalof the detector cover and the removal of the smoke detector head.

* This detector is equipped with a cover removal switchthat instantly provides a trouble condition upon removal ofthe clear cover. For all testing and inspection with the coverremoved, the cover removal switch (designated as SW1 onPCB) 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 inputvoltage sources; namely 24VAC, 24VDC, 115VAC and 230VAC.

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

The duct smoke detector units are designed to operate in duct widthsfrom 6” to 10’ wide with an air velocity between 100 to 4,000 feet per

minute. To verify correct installation, the pressure differentialbetween the sampling (high side) and exhaust (low side) tubesshould be measured using a Magnehelic pressure gauge orequivalent. An acceptable reading is between 0.01 and 1.2 inchesof water.

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

REMOTE ACCESSORIESAudible and visual alarm indicators, remote status indicators, andremote reset/test switches can be accommodated by the SL-2000Series duct units by connecting to DC voltage output terminals asdescribed on Page 4. These terminals are not supervised and thevoltage/current will only be present when the detector unit is inalarm. The remote pilot (green) LED will be permanentlyilluminated when connected to the output terminals as long as inputpower and detector head are present.

SL-2000 AT-A-GLANCEMODEL NUMBER:SL-2000-N 4-Wire Ionization Duct Smoke Detector SL-2000-P 4-Wire Photoelectric Duct Smoke Detector

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

RELAY CONTACT RATINGS:Alarm contacts: 2 Sets form “C” rated at 10A @ 115VAC resistive

1 form “A” rated at 2ATrouble 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-FreezingMaterial: Gray plastic back box with clear plastic cover

(Makrolon 94V-0)Dimensions: 13½” L X 4½” W X 2¼” DMax. 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

POWER STANDBY CURRENT ALARM CURRENTWITHACCESSORIES

WITHACCESSORIES

24VAC 55.0mA 95.0mA 190.0mA 280.0mA24VDC 14.0mA 32.0mA 68.0mA 165.0mA115VAC 22.0mA 25.0mA 32.0mA 50mA230VAC 14.0mA 14.0mA 18.0mA 30.0mA

INST APD0194 I090317

LOCATION PREREQUISITESThis guideline contains general information on duct smokedetector installation, but does not preclude the NFPA and/or ICCdocuments listed. Air Products and Controls assumes noresponsibility for improperly installed duct detectors. To determinethe correct installation position for an SL-2000 Series duct smokedetector, 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 determineduct velocities, examine the engineering specifications thatdefine the expected velocities or use an Alnor model 6000APvelocity meter (or equivalent).

2) To minimize the impact of air turbulence and stratificationon performance, a duct smoke detector should be located asfar as possible downstream from any obstruction (i.e. deflectorplates, elbows, dampers, etc.). In all situations, confirmation ofvelocity and pressure differential within specifications isrequired.

The pressure differential between the input sampling (highpressure) tube and exhaust (low pressure) tube for the SL-2000 Series smoke duct detector should be greater than0.01 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 tothe 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 filtersbecome blocked, insufficient air flow through the duct unit willprevent the correct operation of the duct detector. Duct unitsinstalled in the supply air side may monitor upstreamequipment and/or filters.

6) Where possible, install duct detectors upstream of airhumidifiers and downstream of dehumidifiers.

7) To prevent false alarms, the duct detector should not bemounted in areas of extreme high or low temperatures, inareas where high humidity exists, or in areas where the ductmay contain gases or excessive dust.

SAMPLING TUBE ASSEMBLYThe SL-2000 Series duct smoke detectors employ a speciallynotched sampling tube, which must be ordered separately in oneof four standard lengths.

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’

Standard sampling tubes are steel tubes with air intake holesdrilled the entire length of the tube. These tubes can be cut tolength and must span at least 80% the width of the duct. Samplingtubes over 3.0’ must be supported on the opposite side of the duct.To ensure the correct operation of the sensing tube, the red endcap (red stopper in installation kit) must be inserted in the end of the air intake sampling tube. For custom duct widths, always use the next longest standard size and cut down to theexact requirement.

MECHANICAL INSTALLATION“NO-TOOLS” TUBE INSTALLATIONThe SL-2000 Series duct smoke detector provides a unique,patented mechanism for installation and/or removal of thesampling and exhaust tubes from either the front or rear of thedetector housing.

Once the airflow direction has been determined, insert the inletand exhaust tubes into the duct smoke detector. If the cover isin place, the tubes may be inserted into the back of the detectorvia the key-slots provided. Simply push the tube into placeagainst the spring loaded retainer, and turn into the correctposition, allowing the key to “lock” the tube in the desiredorientation. For front side installation, simply rotate the tuberetainer until the tube may be inserted and oriented properly.Once the tube is installed, rotate the retainer back into place tolock down the tube. Ensure air intake sampling tube is positionedso that the inlet holes are directly facing the airflow.

DUCT PREPARATIONRemove mounting template from the installation kit. Removepaper backing from the mounting template and affix it to the ductat the desired location. Using the template as a guide, drill (2)mounting holes, 3/32” (2.5mm) for the #12 X ½ ” sheet metalscrews packaged in the installation kit. Drill or punch (2) 1¼”(32mm) holes for inlet sampling and exhaust tubes, using thetemplate as a guide. Clean all holes.

MOUNTINGAfter securing the sampling and exhaust tubes to the duct smokeunit, (or initially placing the tubes through the 1¼” holes drilled orpunched in the HVAC duct to accept the inlet sampling andexhaust tubes and then attaching them to the duct unit), hold theduct unit assembly in position and use (2) # 12 X ½” sheet metalscrews (packaged in the installation kit) to secure the duct smokedetector to the HVAC duct sheet metal.

AIR SAMPLING VERIFICATIONTo ensure correct operation of the duct unit use a Magnehelicdifferential pressure gauge, Dwyer 2000 or 4000 Series (orequivalent) to determine the differential pressure between theinlet (high side) and exhaust (low side) tubes. The differentialpressure between the two tubes should be greater than 0.01inches of water and less than 1.2 inches of water.

2

INST APD0194 I090317

WIRING

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

With detector head removed, connect one of the appropriate dedicated power sources to the applicable terminals (see above). Replacedetector head and depress the cover removal switch (SW1) and the unit will be energized. The green pilot LED will be illuminated, and whenpressing the test/reset button (SW2), the red alarm LED will be illuminated. This test confirms the correct basic operation of the duct smokeunit, 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 thefan supply source to that particular piece of equipment when wired as indicated on Page 4.

ELECTRICAL INSTALLATION

TERMINAL AND POWER CONNECTIONSPrior to connecting input power to the duct unit, determine the correct input voltage/ current availability and ensure it is connected to thecorrect terminals.

3

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

SL-2000-PUL Listed with insert installed (100-4,000 ft/min)

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

UL Listed with insert installed (100-2,000 ft/min)UL Listed without insert installed (300-4,000 ft/min)

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 intothe slots provided inside the detector housing so that the adapter fits snugly over the smoke detector head. Unless your system is consistentlyoperating 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 forguidance on when the velocity adapter should be used. For reference, the speeds indicated are intended to represent the velocity of air withinthe duct under normal operational conditions.

(+) P

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CONTACT

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RES

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24VACOPERATION

9 10

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G 220 115 H

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H2

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230VACOPERATION

* *

**

* NOTE: Choose only one source of operating voltage

AL (+)

INST APD0194 I090317

FIRE ALARM CONTROL PANEL WIRING

4

SL-2000Detector #1

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

5 15

13

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SL-2000Detector #X

UL ListedConventional

Fire AlarmControl Panel

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

5

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SL-2000Detector #X

SL-2000Detector #1

13

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INTERCONNECTION WIRING FOR COMMON FUNCTIONS

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

FAN SUPPLY SOURCE

7 8

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9 10

G

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AC/+ /H

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TROUBLE CONTACTS CANNOT BE

CONNECTED TOFIRE PANEL

WHEN USING THIS OPTION WITHOUT THE

USE OF A SLAVE RELAY

Common Test/Reset

30 detectors max. (Use normally open test/reset switch)

Common Alarm Shutdown

Adding Common Alarm Horn/StrobesAdding Individual Horn/Strobes

13 13 13

14 14 14

CONNECTIONS SHOWN FOR ALLPOSSIBLE TERMINAL STYLE

CONFIGURATIONS.

CONNECT ONLY THOSETERMINALS AVAILABLE ON

THE MSR REMOTE ACCESSORYCONTROL ASSEMBLY.

BUZZER

5 INST APD0194 I090317

OPERATIONAL TESTINGTo determine the correct operation of the SL-2000 Series duct smokedetector, ensure input power is connected and the green pilot LED isilluminated.

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

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

The trouble contacts (4,15,5) on the SL-2000 detector will not changestate in the event of a fire alarm, operational, or functional testing.The trouble contacts can be tested by either releasing the coverremoval switch, or depressing the cover removal switch after rotatingthe smoke detector head counter-clockwise and removing thedetector head. This action will extinguish the green pilot LED andcause the trouble contacts to change state, (4-15) will be closed(continuity) and (5-15) will be open circuit. Replacing the detectorhead and rotating it clockwise until it locks, will cause the green pilotLED 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 TESTINGOnce operational testing is concluded the unit requires functional testingto determine the correct operation of the detector head.

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

TESTING AND MAINTENANCE PROCEDURES

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 canagainst cover to release gas into the chamber.

* CAUTION: DO NOT SPRAY GAS FOR MORE THAN ½SECOND. OVERUSE OF TEST GAS FACILITY MAY RESULT INDETECTOR CONTAMINATION.

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

If no test gas is available to conduct functional testing, remove coverand, while holding down the cover removal switch, blow smoke from acotton wick or punk directly at the head to cause an alarm. The alarmindicator 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 particulardetector head (photoelectric or ionization) selected and installed.Consult the smoke bomb data for proper use and compatibility withdetector type.

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

The S65A photoelectric detector head (55000-328APO) operates onthe principle of light scatter and will detect smoke particles of between1 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 analarm condition for an extended period of time, the magnet test or smoketest methods should be used to ensure the detector is locked into alarm.

MAINTENANCEEach installation location must be assessed on its own merits. Ifthe protected area is of a very dirty nature then the SL-2000 Ductunit(s) will have to be checked and cleaned on a quarterly basis orwhen cleaning is required.

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

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

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

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

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

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X7,

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9

CSF

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240-

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• M

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3-92

-E V

OL

27