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Air Duct Monitoring Housings

Installation Instructions
Models 8741, 8742 and 8743

P/N 315-049708FA-4

INTRODUCTION

Models 8741, 8742 and 8743 are air duct monitoring hous-
ings containing sampling tubes. When used with a compat-
ible 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. See the following chart for usage.

l

e

d

o

M

s

r

o

t

c

e

t

e

D

e

l

b

i

t

a

p

m

o

C

y

a

l

e

R

1

4

7

8

4

5

8

8

,

0

1

7

8

,

3

1

7

8

o

N

2

4

7

8

4

5

8

8

s

e

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3

4

7

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1

7

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7

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FFFFFor

or

or

or

or compat

 compat

 compat

 compat

 compatible control equipment,

ible control equipment,

ible control equipment,

ible control equipment,

ible control equipment, see c

 see c

 see c

 see c

 see char

har

har

har

harts on the page

ts on the page

ts on the page

ts on the page

ts on the page

111112 of this manual.

2 of this manual.

2 of this manual.

2 of this manual.

2 of this manual.

TECHNICAL DATA

AIR DUCT CONDITIONS

Temperature Range:

32

O

F (0

O

C) - 100

O

F (38

O

C) per UL 268/268A

Altitude Range:

8741, 8742 and 8743 — No altitude limitations

Relative Humidity Range:

10-85% (non-condensing/non-freezing)

Air Duct Velocity Range:

100-4000 ft/min – 8741, 8742 and 8743

Sampling Tube Pressure Range of Differences:

Greater than 0.01 and less than 1.2 inches of water column

These air duct detectors are designed for detection and

control of products of combustion in a duct system. They

They

They

They

They

are not to be used for

are not to be used for

are not to be used for

are not to be used for

are not to be used for open area prot

 open area prot

 open area prot

 open area prot

 open area protect

ect

ect

ect

ection.

ion.

ion.

ion.

ion.

DO NOT USE air duct detectors with Alarm Verification.

Содержание 8742

Страница 1: ...c see char har har har harts on the page ts on the page ts on the page ts on the page ts on the page 1 1 1 1 12 of this manual 2 of this manual 2 of this manual 2 of this manual 2 of this manual TECHN...

Страница 2: ...detector 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...

Страница 3: ...R 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 MOUNTINGTHE AIR DUCT HOUSING Location on Duct System This guideli...

Страница 4: ...m 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...

Страница 5: ...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 i...

Страница 6: ...d 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 Air Duct Sampling Tube Pressu...

Страница 7: ...e loop Note any limitations on the number of detectors and restrictions on the use of remote devices permitted for each circuit When replacing a detector with a different model be aware that existing...

Страница 8: ...the initiating circuit 3 Do not use looped wire under base terminal 4 Break wire run to provide supervision of connection 5 The green grounding screw in the wiring compartment of the air duct housing...

Страница 9: ...6 or 5 TB3 5 or 6 TB1 1A TB1 TB1 TB1 MODEL 8741 MODEL 8743 MODEL 8743 8710 8713 OPTIONAL REMOTE ALARM INDICATOR MODEL 8727C OR 8727W SEE NOTE 2 LOOP WIRES SEE COMPATIBLE CONTROL EQUIPMENT TABLE 8710 8...

Страница 10: ...zle model AD TGN purchased separately available from Siemens Industry Inc insert the test gas nozzle into the hole in the red test plug in the unit cover Press can against cover for about 1 2 second t...

Страница 11: ...F ed Farada arada arada arada araday S y S y S y S y Service R ervice R ervice R ervice R ervice Represent epresent epresent epresent epresentat at at at ati i i i ive ve ve ve ve If the fire alarm sy...

Страница 12: ...P M 0 0 0 6 C P M 5 A F 0 5 8 4 3 0 5 1 3 N P 1 0 4 W L 3 A F 7 9 9 5 9 0 5 1 3 N P 1 0 4 W L A 4 E Z W L 4 A F 8 1 0 6 9 0 5 1 3 N P 1 0 4 W L A 8 E Z W L 3 A F 2 2 0 6 9 0 5 1 3 N P R O T C E T E D...

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