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P/N 315-049708FA-4

8

LOOP

WIRES.

SEE

COMP

A

TIBLE

CONTROL

EQUIPMENT

T

ABLE.

NO

COM

NC

LOOP

WIRES.

SEE

COMP

A

T

IBLE

CONTROL

EQUIPMENT

T

ABLE.

T

O

NEXT

DETECT

OR

OR

EOL

DEVICE

(1A)

T

O

REMOTE

DEVICE

(6)

CNTL

+

-

(5)

-+

+

-

ALARM

CONT

ACTS

125

V

AC,

24

VDC,

2.5A

SEE

NOTE

2

DEVICE

REMOTE

DEVICE LOOP

-

DEVICE LOOP

+

LOOP/REM

-

DEVICE

CONTROL

NOT USED

LOOP/REM

+

MODEL

8741

T

O

NEXT

DETECT

OR

OR

EOL

DEVICE

+

-

T

O

SECOND

REMOTE

DEVICE

(SEE

MUL

TIPLE

REMOTE

DEVICES)

REM+

-

+

REM-

CONTL

REMOTE

ALARM

RELA

Y

COM

NC

NO

+

-

CNTL

-

+

+

DEVICE

LOOP

MODEL

8742

NOTE:

EOL

DEVICE

MUST

BE

COMP

A

TIBLE

WITH

SYSTEM

INITIA

TING

CIRCUIT

.

OBSER

VE

PROPER

POLARITY

WHERE

APPLICABLE.

(6)

(5)

(1A)

TB1

TB1

8854

8854

N

O

TES:

1.

Up to 30 air duct housings can be

installed on one initiating cir

cuit,

ex

cept as noted in Note 2.

2.

When an 87

42 is used to contr

ol a fir

e

saf

et

y function,

 the 87

42 must be the

ONL

Y de

vice on the initiating cir

cuit.

3.

Do not use looped wir

e under

 base

terminal.

4.

Br

eak wire r

un to pr

ovide supervision

of connection.

5.

The gr

een gr

ounding scr

ew

 in the

wiring compar

tment of the air

 duct

housing is not used.

Figur

e 5

Typical Connections f

or

 the 87

41 / 87

42 Using 8854 Detector

s

If

remote

devices

are

supported

by

the

initiating

circuit,

each

detector/base

may

have

up

to

2

remote

devices

with

the

following

configurations

and

restrictions

only:

MUL

TIPLE

REMOTE

DEVICES

Remote Device

1

8741

8741

Remote Device

2

8845,

8849

8844,

8848

Restrictions

See

Note

2

See

Note

2

SEE

REMOTE

DEVICE

INSTRUCTIONS

FOR

WIRING

DET

AILS:

DEVICE

8845,

8849

8844,

8848

INST

ALLA

TION

INSTRUCTIONS

P/N

315-094925F

A

P/N

315-094926F

A

If the r

ela

y cont

acts are

being used to contr

ol 1

20

VA

C operated eq

uipment,

ensur

e that the conduit is

pr

operly at

ta

ched to the

internal metal gr

ound str

ap,

using the pr

oper

 conduit

loc

king nuts.

  

Failure t

o

p

ro

vide pr

oper

 grounding

m

ay r

esult in f

atal

electrical shoc

k and

violation of national and

local codes.

Summary of Contents for 8742

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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