These instructions are written in accordance with the
installation guidelines of NFPA No. 72, STANDARD
FOR AUTOMATIC FIRE DETECTORS.
CAUTION
Detection Device Storage
DO NOT install this detection device until all
construction is completed.
DO NOT store this detection device where it can
be contaminated by dirt, dust, or humidity.
DETECTOR PLACEMENT
Locate the 8842 on the ceiling, at least 4 inches from
the side walls. For an ideal, smooth ceiling condition,
place the detectors at a maximum center spacing of
50 feet (2500 square feet), 25 feet from side walls or
room partitions. For FM Approved installaltions this
detector has an RTI rating of QUICK, which allows a
maximum center spacing of 20 feet (400 square feet).
Locate detectors 10 feet from side walls or room
partitions.
Actual job conditions and sound engineering judgment
to determine detector spacing. Consider environmental
factors including ambient temperature fluctuation, and
the nature of the fire hazard. Room or area
configuration and ceiling type (sloped or flat, smooth
or beamed) also dictates placement.
Should questions arise regarding detector placement,
follow the drawings provided and/or approved by
Faraday or by its authorized distributors. This is
extremely important! The detector placements shown
on these drawings were chosen after a careful
evaluation of the area being protected. Faraday's
extensive experience in design of the system assures
the best detector placement by following these
drawings.
Installation/Wiring Instructions
Model 8842 Thermal Detector
SPECIFICATIONS
Environmental
Temperature: 32
O
F (0
O
C) to 100
O
F (38
O
C).
Humidity:
Up to 93% RH, non condensing
Air Pressure: No effect.
Alarm Temp:
135
O
F (57
O
C)
Electrical
Voltage:
16-27 VDC
Ripple:
3V peak-to-peak
Supervisory Current: 110µA max
Alarm Current:
17-24mA
Start-up Time:
50 seconds max
DETECTOR WIRING
The 8842 should be connected as shown in Figure 1
using the separate mounting base, Model 8853. Follow
the control panel wiring connection drawing installed
on the inside face of each control panel cover. See
8853 instruction, P/N 315-094193FA, for base
mounting. Duplicate wiring information is also in the
Installation, Operation, and Maintenance Manual
provided with every control panel. Note any
limitations on the number of detectors and
restrictions on the use of remote devices permitted
for each circuit.
INSTALLATION / REMOVAL OF DETECTOR
TO INSTALL:
•
Align LED in detector with LED symbol on base
and insert detector into base.
•
Rotate detector counterclockwise while gently
pressing on it until the detector drops fully into base.
•
Then rotate the detector clockwise until it stops and
locks in place. Insert optional locking screw (Order
P/N 446371).
TO REMOVE:
Loosen locking screw, if installed. Then rotate the
detector counterclockwise until stop is reached. Pull
detector out of base.
P/N 315-095429FA-3
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
Web: www.faradayfirealarms.com
