P/N 315-094198FA-7
Photoelectric Detector Models 8854/8843
Installation/Wiring Instructions
Siemens Building Technologies, Inc.
8 Fernwood Road • Florham Park, NJ 07932
Tel: (973) 593-2600 • Fax: (973) 593-6670
Web: www.faradayfirealarms.com
These instructions are written in accordance with the installa-
tion guidelines of NFPA No. 72, National Fire Alarm Code,
and CAN/ULC-S524, The Installation of Fire Alarm Systems.
DETECTOR PLACEMENT
For a clear air, 0 to 4000 ft/min velocity application, use 30
foot center spacing (900 sq ft) from NFPA Standard 72 Chap-
ter 5 and CAN/ULC-S524 as a starting point for a detector
installation layout. This spacing, however, is based on ideal
conditions – smooth ceiling, no air movement, and no physi-
cal obstructions. In some applications, considerably less area
is protected adequately by each smoke detector. In all in-
stallations, place the detector on the ceiling, a minimum of
6 inches from a side wall, or on a wall, 6 inches from the
ceiling.
Follow the drawings provided or approved by Faraday or by
its authorized distributors. See NFPA 72, NATIONAL FIRE
ALARM CODE, Chapter 5 for additional guidance on special
issues such as beamed construction and high stockpiling.
TO AVOID NUISANCE ALARMS:
DO NOT
locate the 8854/8843 detector where excessive smoke
concentrations exist under normal conditions, or in areas of pro-
longed high relative humidity where condensation occurs.
DO NOT
locate the 8854/8843 detector next to an oil burner,
kitchen, or garage where exhaust fumes can trigger an alarm.
Other causes of false alarms are dust accumulation, heavy
concentrations of steam, heavy pipe or cigar smoke, and
certain aerosol sprays.
AIR CURRENTS
Before a detector can sense a fire, the products of combustion
or smoke must travel from the fire to the detector. Since their
travel is especially influenced by air currents, consider the
movement of air in the design of the system.
While combustion products tend to rise, drafts from hallways,
air diffusers, fans, etc., may help or hinder the travel of com-
bustion products to the detector. When positioning a detector
at a particular location, give consideration to windows and
doors, both open and closed, and to influencing air movement.
Never install a detector in the air stream of a room air supply
diffuser. It is better to position a detector closer to an air return.
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.
Thermal Alarm Temp.: 135
0
F (57
0
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 8854/8843 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 in-
side face of each control panel cover. See 8853 instruction,
P/N 315-094193FA, for base mounting. Duplicate wiring in-
formation is also in the Installation, Operation, and Mainte-
nance 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 cir-
cuit.
INSTALLATION / REMOVAL OF DETECTOR
TO INSTALL:
• Align LED in detector with LED symbol on base and in-
sert 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).
END OF
LINE
DEVICE
(NOTE
POLARITY
WHEN
APPLICABLE)
1a
1b
1b
1b
5
5
6
6
5
+
-
8853
[WITH REMOTE DEVICE(S)]
+
-
TO INITIATING
CIRCUIT OF
SIEMENS
BUILDING TECH-
NOLOGIES, INC.
CONTROL PANEL
(SEE CAUTION 1)
MULTIPLE REMOTE DEVICES
SEE REMOTE DEVICE INSTRUCTIONS
FOR WIRING DETAILS:
each detector/base may have up to 2 remote devices
with the following configurations and restrictions only:
If remote devices are supported by the initiating circuit,
DEVICE
8852
8845, 8849
8844, 8848
Device 1
Remote
8852
8845, 8849
8852
8845, 8849
Device 2
Remote
8844, 8848
8845, 8849
8844, 8848
8845, 8849
Restrictions
See Caution 2
See Caution 2
Wire from base to
to
8844 / 8848
8852
INSTRUCTIONS
INSTALLATION
P/N 315-095519FA
P/N 315-094925FA
P/N 315-094926FA
8853
[NO REMOTE DEVICE]
Figure 1
Installation and Wiring Diagram for
8854/8843 Conventional Detector
CAUTION:
1. Do not use looped wire under base terminal 5.
Break wire run to provide supervision of con-
nection.
2. When a remote relay is used to control a critical
system function, the relay and its associated
detector and optional module(s) must be the
ONLY devices on the initiating circuit.
All manuals and user guides at all-guides.com
all-guides.com
