Siemens ILI-1, ILI-1A, ILI-1H, ILI-1AH Installation Instructions Manual

Installation Instructions

Smoke and Fire Detector Models
ILI-1, ILI-1H, ILI-1A, and ILI-1AH

Fire Safety

These instructions are written in accordance with the
installation guidelines of NFPA No. 72, National Fire
Alarm Code, and CAN/ULC-S524, The Installation of
Fire Alarm Systems.

CAUTION

Detector Storage

DO NOT install the detector until all construction
is completed.

DO NOT store this detection device where it can
be contaminated by dirt, dust, or humidity.

DETECTOR PLACEMENT

Although no specific spacings are set for the detectors
used for the 0 to 300 ft/min clean air velocity applica­tion, use 30 foot center spacing (900 sq ft) from NFPA
72, National Fire Alarm Code, Chapter 5, if practical,
as a guide or starting point for a detector installation
layout. This spacing, however, is based on ideal
conditions—smooth ceiling, no air movement, and no
physical obstructions. In some applications, therefore,
considerably less area is protected adequately by each
smoke detector. This is why it is mandatory to closely
follow the installation drawings. In all installations
(except in special circumstances, such as in computer
room underfloors where the velocity may be up to 1200
ft/min) place the detector on the ceiling, a minimum of
12 inches from a side wall, or on a wall, 6 inches from
the ceiling.

If you have questions regarding detector placement,
follow the drawings provided or approved by Siemens
Building Technologies, Inc. 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 that is protected.
Factors such as air currents, temperature, humidity,
pressure, and the nature of the fire load were carefully
considered. Especially noted were the room or area
configuration and the type of ceiling (sloped or flat,
smooth or beamed). Siemens Building Technologies,
Inc.'s extensive experience in the design of the system
assures the best detector placement by following these
drawings. Sound engineering judgment by qualified
personnel must be followed.

TO AVOID NUISANCE ALARMS WITH THESE
DETECTORS:

DO NOT LOCATE the detectors next to an oil burner,
kitchen, or garage where exhaust fumes can trigger
an alarm. Other causes of nuisance alarms are dust
accumulation, heavy concentrations of steam, heavy
pipe or cigar smoke, aerosol sprays, high air velocity,
or in an area of prolonged high relative humidity where
condensation occurs.

NOTE: Except in the case of the ILI-1A and ILI-1AH

where the detector can be used for high air
velocity applications of up to 1200 feet per
minute.

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 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 combustion products to the
detector. When positioning a detector at a particular
location, consider the position of windows and doors,
both open and closed, and 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.

The distance that products of combustion or smoke travel
from a fire to the detector is not usually the shortest linear
route. Combustion products or smoke usually rise to
the ceiling, then spread out. With an average ceiling
height (8 to 10 feet), this is not an abnormal factor.
However, with high ceilings such as in churches, ware­houses, auditoriums, etc., consider the height.

SPECIAL CEILING CONSTRUCTION FACTORS

Ceiling obstructions can change the natural movement
of air and combustion products. Depending on the
direction of smoke travel, joists and beams can slow
the movement of heated air and smoke, while pockets
between them can contain a reduced level of
smoke.Take obstructions created by girders, joists,
beams, air conditioning ducts, or architectural design
into consideration when determining area protection.

Siemens Building Technologies, Inc.
8 Fernwood Road
Florham Park, New Jersey 07932

P/N 315-095387-5

Siemens Building Technologies, Ltd.
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 CN

Figure 1

ILI-1, ILI-1H, ILI-1A, and ILI-1AH Installation and Wiring Diagram

Refer to the Initiating Devices chapter of NFPA
Standard 72 for Location and Spacing requirements
for specific types of construction; e.g. beam,
suspended, level, sloped and peaked ceilings.

TEMPERATURE AND HUMIDITY

The temperature range for the ILI-1 Series is 32°F
(0°C) to 100°F (38°C). The four models can each be
used in environments where the humidity does not ex­ceed 93% (non-condensing).

PRESSURE

Normal changes of atmospheric pressure have a
negligible effect on detector sensitivity. However, the
lower air pressure at higher altitudes does have some
effect on the sensitivity of ionization type detectors.
Refer to the following table.

APPLICATIONS

Velocity

Range

Model

ILI-1 0-300 0-4000 Open area

ILI-1H 0-300 3000-8000 Open area

ILI-1A 0-1200 0-4000

ILI-1AH 0-1200 3000-8000

(ft/min)

Altitude

Range

(feet)

Application

Open area/Computer facilities/
Air duct spots

Open area/Computer facilities/
Air duct spots

SPECIAL NOTE - HIGH STOCKPILING

In general, detector placement for high stockpiling re­quires closer spacing, depending on the nature of the
stock, its stored height, and the height of the building.
Newer technologies recommend additional detector
locations at tiered, lower levels. Detector placement
for this type hazard requires a judgment factor that
can only be provided by experienced, qualified
personnel.

DETECTOR WIRING

Siemens Building Technologies, Inc. detectors should
be interconnected as shown in Figure 1 and wired to
the control panel by following the Wiring Diagram
installed on the inside face of the control panel or in
the Control Panel Manual provided. Note any
limitations on the number of detectors permitted on
each circuit.

DETECTOR MOUNTING

The detector has a separate base which attaches to a
standard 4 inch square, 4-11/16 inch square, 4 inch
octagonal, or single gang outlet electrical box. The depth
of the box is determined by the NEC for the number and
size of the conductors used. A finishing trim ring (Model
RA-ADB) is available for bases using a 4 inch square box.

TO MOUNT:

• Route all wires outward from outlet box.

• Place the detector so that the ALARM LED is
normally visible by positioning the LED mark in the
base in the necessary direction. (See Figure 2.)

• Mount base to outlet box and
route wires through the hole
in the center of the base.
Make connections directly
to the base terminals. Refer
to Figure 1 for details.

• When mounting the
detector base and routing
wires through the cutouts in
the air shield, make sure
the shield is sealed against
air leaks. Open the cutouts
only as much as required.

• Remove factory installed
jumper in base between
terminals 1a and 1b.

Figure 2

Detector Installation

2