Siemens FDBZ492-PR Installation Instructions Manual

Global Air Duct Monitoring Housing

Installat ion Instructions Model FDBZ492-PR

INTRODUCTION Model FDBZ492-PR from Siemens Industry, Inc., is a RoHS

compliant air duct monitoring housing containing sampling tubes. When used with a Siemens conventional smoke detector, smoke and combustion products are detected for shutdown of the duct system and/or operation of supplementary equipment as provided by the system control panel. 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.

TECHNICAL DATA AIR DUCT CONDITIONS

Temperature Range:

With PE-11, 8854, PE-11C: 0

O

C (32OF) - 38OC (100OF)

With OP121: 0

O

C (32OF) - 49OC (120OF)

Altitude Range:

No altitude limitations

Relative Humidity:

Up to 95% RH (non-condensing/non-freezing)

Air Duct Velocity Range:

100-4000 ft/min

Sampling and Exhaust Tube Pressure Differential Range:

Greater than 0.01 and less than 1.2 inches of water column

These airThese air

These air

duct det duct det

duct det

ectors are designed forectors are designed for

ectors are designed for

det det

det

ectect

ect

ion andion and

ion and

control of products of combustcontrol of products of combust

control of products of combust

ion in a duct syion in a duct sy

ion in a duct sy

stst

st

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it

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duct det

ectors with ectors with

ectors with

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Alarm

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ASSEMBLY This detector has a cover tamper (removal) switch. Care should

be taken when installing the cover. Squarely place the cover on the unit to aviod possible damage to the switch.

DO NODO NO

DO NO

T SLIDE COT SLIDE CO

T SLIDE CO

VER INVER IN

VER IN

TT

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O POSITION.O POSITION.

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Siemens Industry, Inc. Building Technologies Division

2

APPLICATION The FDBZ492-PR duct smoke detectors provide early detection

of smoke and products of combustion present in air moving through an HVAC duct supply, return, or both. These devices are designed to prevent the recirculation of smoke in areas by the air handling system’s fans and blowers and may be used with fire alarm systems that shut down complete air handling system in the event of smoke detection.

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oror

or

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ion of a duct smokion of a duct smok

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e unit please refer

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to NFP

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A 72 (Nat

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Alarm Code),

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ice for

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

OPERATION When the Model FDBZ492-PR is operating, a sample of air is

drawn from the duct and passed through the sampling chamber by means of the input sampling tube. The air sample passes through the smoke detector mounted in the duct housing and is exhausted back into the duct through the outlet tube.

• The FDBZ492-PR 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.

• The FDBZ492-PR contains a green power on LED, red alarm LED and yellow trouble LED which are visible through the housing cover.

• The trouble LED is activated when either the housing cover or smoke detector is removed from the unit.

• When the trouble LED is activated, the power LED turns off.

• A reset/test switch is located on the housing cover and is used to reset the unit after an alarm and the smoke condition is cleared. When not in alarm, the reset/test switch can be used to test that the unit will operate properly when an alarm condition exists.

The trouble contacts will not operate in the event of a smoke alarm. The FDBZ492-PR duct detector will operate from various input voltage sources; namely 24VAC, 24VDC, 115VAC and 230VAC.

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Detector LED The FDBZ492-PR contains an LED indicator (located on the

smoke detector) capable of flashing either one of three distinct colors: green, yellow, or red. During each flash interval, the microprocessor based detector checks the following:

• for smoke in its sensing chamber

• that its critical smoke sensing electronics are operating.

Based on the results of these checks, the LED indicator flashes as follows:

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MOUNTING THE AIR DUCT HOUSING

Location on Duct System

This guideline contains general information on duct smoke detector installation, but does not preclude the NFPA documents listed. Siemens Industry, Inc. assumes no responsibility for improperly installed duct detectors. To determine the correct installation position for an FDBZ492-PR duct smoke detector, the following factors must be considered.

1) A uniform non-turbulent (laminar) airflow between 100 ft/ min. to 5,000 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,

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confirmation of velocity and pressure differential within specifications is required.

The pressure differential between the input sampling (high pressure) tube and outlet (low pressure) tube for the FDBZ492-PR 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.

Figure 2 Recommended Locations in Duct Systems

RETURN

AIR

SUPPLY

AIR

AIR DUCT HOUSING

DAMPER

BLOWER

FILTER

PLENUM

FRESH AIR INTAKE

DAMPER

TYPE A: CLOSED SYSTEM - NO EXHAUST

D D

TYPE B: PROVISION FOR EXHAUSTING

SOME PERCENTAGE OF RETURN AIR

RETURN

AIR

SUPPLY

AIR

AIR DUCT HOUSING

DAMPER

BLOWER

FILTER

PLENUM

FRESH AIR INTAKE

DAMPER

D D

EXHAUST AIR

OUTPUT

DAMPER

TYPE C: RETURN AIR UNDER POSITIVE PRESSURE

FROM SEPARATE BLOWER

EXHAUST AIR

OUTPUT

DAMPER

RETURN

AIR

SUPPLY

AIR

AIR DUCT HOUSING

RETURN AIR

BLOWER

AIR DUCT

HOUSING

DAMPER

BLOWER

FILTER

PLENUM

FRESH AIR INTAKE

DAMPER

D D

Figure 1 Typical Mounting of Duct Housing

OUTLET

TUBE

INPUT

SAMPLING

TUBE

CENTER

LINE

OF DUCT

C

L

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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.

Duct Preparation The FDBZ492-PR Housings come with an installation kit that

contains the following items:

• Short return (outlet) tube

• Input sampling tube stopper

• Two #12 x

3

/4” sheet metal screws

• Mounting template (packaged separately)

Remove mounting template. 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

3

/4” sheet metal screws packaged in the installation kit. Drill or punch (2) 1¼” (32mm) holes for input sampling and outlet tubes, using the template as a guide. Clean all holes.

Sampling Tube Installation

The FDBZ492-PR duct smoke detectors use a specially notched sampling tube, which may be ordered separately in one of four standard lengths. ST-10 For duct widths of 6" to 1.0’ ST-25 For duct widths of 1.0’ to 3.0’ ST-50 For duct widths of 3.0’ to 5.0 (requires support) ST-100* For duct widths of 5.0’ to 10.0’ (requires support)

*

This model is supplied as two 5 ft. sections with a coupling. Assembly is required for installation.

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e of sampling holes.e of sampling holes.

e of sampling holes.

Only the specific t Only the specific t

Only the specific t

ube must be usedube must be used

ube must be used

for the specified duct width.for the specified duct width.

for the specified duct width.

Standard sampling tubes are steel tubes with air intake holes drilled the entire length of the tube. These tubes can be cut to length and must span at least 80% the width of the duct. Sampling tubes over 3.0’ must be supported on the opposite side of the duct. To ensure the correct operation, the red stopper (stopper in installation kit) must be inserted in the end of the air input sampling tube. If the input tube protrudes through the opposite side of the duct, the opening around the tube must be

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sealed. For custom duct widths, always use the next longest standard size and cut down to the exact requirement.

Once the airflow direction has been determined (refer to Figure

3), insert the input and outlet tubes into the duct housing.

1. Remove the cover from the housing.

2. Loosen the screw and rotate the tube retainer until the

input tube is inserted and oriented properly. Ensure that the notched end of the tube is inside the housing and that the air input sampling tube is positioned so that the input holes are directly facing the airflow.

3. Once the tube is installed, rotate the retainer back into

place and tighten screw.

4. Install the outlet tube in the remaining position. Once the

tube is installed, rotate the retainer back into place and tighten screw.

Mounting After securing the input and outlet tubes to the duct smoke unit,

(or initially placing the tubes through the 1¼” holes drilled or punched in the HVAC duct to accept the input and outlet tubes and then attaching them to the duct unit), hold the duct unit assembly in position and use (2) # 12 X

3

/4” sheet metal screws (packaged in the installation kit) to secure the duct smoke detector to the HVAC duct sheet metal.

INPUT

TUBE HOLES

FACE AIR FLOW

INSERT RED STOPPER

THIS END OF INPUT

TUBE

OUTLET

TUBE INSTALLED DOWNSTREAM OF AIRFLOW DO NOT INSERT RED STOPPER

AIR FLOW DIRECTION

DUCT WIDTH

TUBE SUPPORT ONLY FOR DUCTS GREATER THAN 3 FEET WIDE

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.

Figure 3 Sampling Tube Orientation

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Air Duct Sampling Tube Pressure Measurement

The Model PDM-3 Pressure Differential Measuring device should be used to ensure that the sampling tube pressure differential is within the specified limits. The differential pressure between the two tubes should be greater than 0.01 inches of water and less than 1.2 inches of water. Qualified personnel should take measurements in accordance with the PDM-3 instructions, P/N 315-085535.

WIRING Conduit Knockouts

To remove plastic knockout, first cut the plastic tab on the specific knockout. Refer to Figure 4 to locate the tab. Then, using a screw driver placed at the tab location, tap with a hammer until the knockout breaks out. Clean the hole before installing conduit.

3/4” KNOCKOUTS

1/2” KNOCKOUT

PLASTIC

TAB

Figure 4 Removing the Knockouts

Wiring FDBZ492-PR terminal wiring connections are shown in Figure 5.

Note any limitations on the number of detectors and restrictions on the use of remote devices permitted for each circuit.

Do not use looped wire underDo not use looped wire under

Do not use looped wire under

t t

t

erminals.erminals.

erminals.

Break wire run to Break wire run to

Break wire run to

propro

pro

vide forvide for

vide for

proper proper

proper

supervision of connect supervision of connect

supervision of connect

ions.ions.

ions.

With detector head removed, connect one of the appropriate dedicated power sources to the applicable terminals (Refer to Figure 5). Replace detector head and depress the cover removal switch (SW1) on the PCB assembly and the unit will be energized. The green power LED will be illuminated, and when pressing the test/reset button (SW2) on the PCB assembly, 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).

Wire the FDBZ492-PR as a stand alone unit as shown in Figure 6. Wire the FDBZ492-PR as part of a FACP as shown in Figure 7. Wire the FDBZ492-PR accessories as shown in Figures 7 and 8.

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FAN SUPPLY SOURCE

NC*

NO*

COM*

ALARM RELAY

*See Figure 5 for

terminal block connections

Figure 5 Wiring the FDBZ492-PR

TB7

TB8

25

24

23

21 22

TB10

TB9

987321654

19

20

18

17

16

15

14

13

12

1110

Figure 6 Stand Alone Wiring the FDBZ492-PR

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Figure 7 Wiring the FDBZ492-PR to a Fire Alarm Control Panel

Figure 8 FDBZ492-PR Remote Accessory Wiring

FDBZ492-PR

UL Listed

Conventional

Fire Alarm

Control Panel

FDBZ492-PR

N.C. TROUBLE

CONTACT

N.C. TROUBLE CONTACT

N.O. ALARM

CONTACT

N.O. ALARM CONTACT

SAMPLE CONTROL PANEL WIRING - STYLE D / CLASS A IDC )*

(Supervised - A fault condition will not inhibit an alarm response

*See Figure 5 for terminal block connections

FDBZ492-PR

UL Listed

Conventional

Fire Alarm

Control Panel

FDBZ492-PR

N.C. TROUBLE

CONTACT

N.C. TROUBLE CONTACT

N.O. ALARM

CONTACT

N.O. ALARM CONTACT

SAMPLE CONTROL PANEL WIRING - STYLE B / CLASS B IDC

(Supervised - A fault condition will not inhibit an alarm response)*

*See Figure 5 for terminal block connections

EOL End of Line for Specific FACP

FDBZ492-PR*

FDBZ492-RTL

C-/RTL-

GREEN/ RED LED

RTL-CNT

C+/RTL+

KEY

SWITCH

(NORMAL/TEST)

5

6

1b

*

See Figure 5 for terminal block connections

AL1

FACP

NO

FACP NO

C

-

C-

C+

FACP

COM

FACP COM

+

-

+

-

FDBZ492-PR

#1

FDBZ492-PR

#X

All alarm relays operate with single alarm.

Individual horn/strobe units operate on

alarmed detector only. 30 detectors max.

FDBZ492-PR#1FDBZ492-PR

#X

T/R+

C+

Common test/reset. 30 detectors max.

(Use normally open test/reset switch.)

TEST/RESET

SWITCH

FDBZ492-PR

#1

FDBZ492-PR

#X

AL1

C

+

C

+

All alarm relays operate with

single alarm. 30 detectors max.

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

INTERCONNECTION WIRING FOR COMMON FUNCTIONS*

*See Figure 5 for terminal block connections

AL1

C

-

C

-

C

+

C

+

-

+

-

FDBZ492-PR

#1

FDBZ492-PR

#X

All alarm relays operate with single alarm. All horn/strobe units operate

as well. 10 detectors max.

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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 in Figure 6.

Installation Of Smoke Detectors

To Install:

• Remove cover by loosening the four screws. Take off the cover and set it aside.

• Align detector with base and insert detector.

• Rotate detector

clockwise while gently pressing on it until

the detector drops fully into base.

• Then rotate the detector clockwise until it stops and snaps in place.

• Replace cover and tighten the four screws.

To Remove:

• Rotate the detector counterclockwise until stop is reached.

• Pull detector out of base.

TESTING Only qualified service personnel should test these units. To

assure proper operation of the detector and control panel, both the Sensitivity and the Functional tests should be conducted. The minimum test schedule may be found in the current edition of NFPA 72 for installations in the U.S

Sensitivity Test The detectors monitor their smoke sensitivity automatically and

require no test equipment. A green flash of the detector LED or in the FDBZ492-RTL Remote Accessory indicates that the smoke sensitivity is within its listed limits.

Functional Test Smoke Testing

Using TG-11 smoke test canister with testing nozzle model AD-TGN (purchased separately) available from Siemens Industry, Inc., insert the test gas nozzle into the hole in the red plug in the unit cover. Press can against cover for about

1

/2 second to

release gas into the chamber.

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Do not spra

y gy g

y g

as foras for

as for

more than ½ second. more than ½ second.

more than ½ second.

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est

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

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

Refer to the PE-11 Installation Instructions, P/N 315-094198, the PE-11C Installation Instructions, P/N 315-095626, the 8854 Installation Instructions, P/N 315-094198FA, or the OP121 Installation Instructions, P/N A6V10281367, as applicable, for additional information on testing these detectors.

MAINTENANCE This unit is equipped with cover removal switch (SW1) 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 normal operation.

The performance of the air duct detector unit may be adversely affected by dirt or foreign matter on the sampling tubes or detector. If the air holes in the input sampling tube become restricted, the unit cannot receive a proper air sample, and performance is impaired. It is recommended that the sampling tubes be checked and cleaned periodically. The detector maintenance program should consist of periodic cleaning of dust from the detector head by using a vacuum cleaner. For cleaning, refer to the PE-11 Installation Instructions, P/N 315-094198, the PE-11C Installation Instructions, P/N 315-095626, or the 8854 Installation Instructions, P/N 315-094198FA.

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ances is the OP1

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ector

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head to be

disassembled.disassembled.

disassembled.

No repairs or No repairs or

No repairs or

cleaning should be at cleaning should be at

cleaning should be at

tt

t

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The cleaning and test program is recommended for 6 month intervals, or more frequently, if needed, depending on the individual detector environment. Consult your local code and AHJ requirements for required maintenance schedules.

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REMOTE ACCESSORIES

The accessories available for use with FDBZ492-PR are:

SEIROSSECCAETOMER

TOLIP

DEL

)neerG(

MRALA

DEL

)deR(

ELBUORT

DEL

)wolleY(

NROH

SGNITARLACIRTCELE

LEDOM/REBMUNTRAPNOITPIRCSED

YBDNATSMRALAELBUORT

-72S-91345S LTR-294ZBDF/1A

detarepo-yek,toliP,mralAetomeR

hctiwSteseR/tseT

••

Am2.0Am2.0Am0

SAGTSETEKOMS

057946-005saGtseTrotceteD11-GT 717946-005tiKelzzoNsaGtseTNGT-DA

DAEHROTCETEDEKOMS

0

51490-005rotceteDekomScirtceleotohP11-EP

036590-005rotceteDekomScirtceleotohPC11-EP

AF051490-005rotceteDekomScirtceleotohP4588 1A-1F-27345SrotceteDekomScirtceleotohP121PO

GNISUOHTHGITRETAW

1A-62B-345STW-294ZBDF

COMPATIBLE CONTROL EQUIPMENT

ROTCETED121PO/4588/C11-/11-EPGNISURP-294ZBDF

tnempiuqEeludoM

reifitnedIytilibitapmoC

/noitallatsnIeludoM

snoitcurtsnIgniriW

)SLX-redniFeriF(4-CDC 8-001430-513N/P

)3METSYS(53-PC 22-209480-513N/P

)QI-LXM,LXM(6B1-

MZC* 9-553590-513N/P

)QI-LXM,LXM(4-MZC 01-628090-513N/P

MZH )109CF,429CF,229CF,5002CF,5202CF,0502CF,052-S

F,SLX-redniFeriF( 6-058430-513N/P

XE-LXS 8-799590-513N/P

)XE-LXS(X4-EZS 8-810690-513N/P

)XE-LXS(XA8-EZS 8

-220690-513N/P

)C052-SF(MZS* 4-C058430-513N/P

)3METSYS(53-UZ 81-222380-513N/P

)0007-CPM/0006-CPM(5078 8-90

3744-513N/P

ELECTRICAL RATINGS

4588DNAC11-EP,11-EP

egatloVCDV72-61

elppiRkaep-ot-kaepV3

tnerruCyrosivrepuS.xamAu011

emiTpu-tratS.xamsdnoces0

5

tnerruCmralAAm05-33

121PO

egatloVCDV72-61

elppiRkaep-ot-kaepV3

tnerruCyrosivrepuS.xamAu011

emiTpu-tratS.xamsdnoces03

tnerruCmralAAm

05-03

Siemens Industry, Inc. Building Technologies Division Florham Park, NJ

P/N A6V10330327_a_enSiemens Canada Limited Building Technologies Division 2 Kenview Boulevard Brampton, Ontario L6T 5E4 Canada

RP-294ZBDF

TUPNI

TNERRUC

TNERRUCYBDNATS

)lacipyT(

TNERRUCMRALA

)lacipyT(

TNERRUCELBUORT

)lacipyT(

CDV42Am92Am321A

m02

zH06@CAV42Am08Am372Am56

zH06@CAV511Am62Am75Am53

zH06@CAV032Am03Am83Am02