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Faraday 8742 Installation Instructions Manual

Air duct monitoring housings

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Installation Instructions
Models 8741, 8742 and 8743
Air Duct Monitoring Housings
INTRODUCTION
TECHNICAL DATA
P/N 315-049708FA-4
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.
M
o
d
l e
C
o
m
8
7
4
1
8
8
5
4
8
7
4
2
8
8
5
4
8
7
4
3
8
7
1
0
F F F F F or or or or or compat
compat
compat
compatible control equipment,
ible control equipment,
ible control equipment,
ible control equipment, see c
compat
ible control equipment,
1 1 1 1 1 2 of this manual.
2 of this manual.
2 of this manual.
2 of this manual.
2 of this manual.
AIR DUCT CONDITIONS
Temperature Range:
32
F (0
C) - 100
O
O
O
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
are not to be used for open area prot
are not to be used for
are not to be used for
are not to be used for
are not to be used for
DO NOT USE air duct detectors with Alarm Verification.
p
t a
b i
e l
D
e
e t
c
o t
s r
8
7
1
0
8
7
1
3
,
,
8
7
1
3
,
F (38
C) per UL 268/268A
O
open area prot
open area protect
open area prot
open area prot
see c
see char
see c
har
har
harts on the page
ts on the page
ts on the page
ts on the page
see c
har
ts on the page
ect
ection.
ect
ion.
ion.
ion.
ect
ion.
R
e
a l
y
N
o
Y
e
s
Y
e
s
They
They
They
They

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Summary of Contents for Faraday 8742

  • Page 1 Models 8741, 8742 and 8743 Air Duct Monitoring Housings 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.
  • Page 2: Operation

    (designated as SW1 on PCB) must be manually depressed to simulate normal operation. LED Indicator The 8741, 8742 and 8743 contain 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: •...
  • Page 3 NFPA documents listed. Siemens Industry, Inc. assumes no responsibility for improperly installed duct detectors. To determine the correct installation position for an 8741, 8742 or 8743 duct smoke detector, the following factors must be considered.
  • Page 4 The pressure differential between the input sampling (high pressure) tube and outlet (low pressure) tube for the 8741, 8742 or 8743 duct smoke detector should be greater than 0.01 inches of water and less than 1.2 inches of water.
  • Page 5 (2) 1¼” (32mm) holes for input sampling and outlet tubes, using the template as a guide. Clean all holes. Sampling Tube Installation The 8741, 8742 and 8743 duct smoke detectors use a specially notched sampling tube, which may be ordered separately in one of four standard lengths.
  • Page 6 Remove the cover from the housing. 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.
  • Page 7 Wiring The 8741, 8742 and 8743 should be connected as shown in Figures 5 and 6. Note any limitations on the number of detectors and restrictions on the use of remote devices permitted for each circuit. The 8741 is used with the 8713 detector in the MPC-6000/ MPC-7000 System.
  • Page 8 DEVICE LOOP/REM DEVICE LOOP DEVICE LOOP DEVICE LOOP/REM NOT USED REMOTE CONTROL P/N 315-049708FA-4...
  • Page 9 NOT USED TO REMOTE TB1 LINE 1 OR 2 TO REMOTE TB2 TO REMOTE TB3 OTHER LINE P/N 315-049708FA-4...
  • Page 10 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 8854 detector monitors its smoke sensitivity automati- cally and requires no test equipment.
  • Page 11: Maintenance

    Refer to the following Installation Instructions for additional information on testing each of these detectors: The 8710 and 8713 can also be tested individually using the 8720. Refer to the 8720 Manual, P/N 315-033260FA. MAINTENANCE The performance of the air duct detector unit may be adversely affected by dirt or foreign matter on the sampling tubes or detector.
  • Page 12 COMPATIBLE CONTROL EQUIPMENT i l i i f i i l i i f i The detector model number is the compatibility identifier. ELECTRICAL RATINGS FOR 8854 ELECTRICAL RATINGS FOR 8713 AND 8710 Electrical ratings are not provided here for these detectors. Guidance for detector loop loading, along with loop wire electrical specifications are provided in the applicable control unit instructions given in the above Compatible Control...

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87438741