Siemens DI-3 User manual

These instructions are written in accordance with the
installation guidelines of NFPA 72, National Fire Alarm
Code, and CAN/ULC-S524, The Installation of Fire Alarm
Systems.
DETECTOR PLACEMENT
Although no specific spacings have been allocated 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
Standard 72 Chapter 5 and CAN/ULC-S524, 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
between 300 and 1200 ft/min) the detector should be located
on the ceiling, a minimum of 6 inches from a side wall, or on
a wall, 6 inches from the ceiling.
Should questions arise regarding detector placement,
drawings provided or approved by Siemens Industry, Inc., or
by its authorized distributors should be followed. This is
extremely important! The detector placements shown on
these drawings have been chosen after a careful evaluation
To initiating circuit of
compatible control
unit (See †NOTE and
Compatibility Chart)
P/N 315-081882, Rev. 2
Connection for listed remote lamp
RL-30 or equivalent, audible base
ADB-3, or relay RR-3, 40mA max, at
24V (one per detector.) CAUTION: Only
one critical function remote should be
used in each circuit, since only one alarm
per circuit is guaranteed.
†NOTE: The Models DI-3, DI-3H, DI-3IS*, DI-A3, and
DI-A3H are rated at 16-25.7 VDC—3 volt peak to
peak maximum ripple. Supervisory current 110μA
max steady state. 350μA peak surge upon
application of power, and 135mA max in alarm.
Figure 1 SIEMENS Models DI-3, DI-3H, DI-3IS, DI-A3, AND DI-A3H
Installation And Wiring Diagram
*NOTE: The DI-3IS is FM listed only. Do not use remote function with the DI-3IS.
Installation/Wiring Instructions
Smoke and Fire Detector Models DI-3, DI-3H, DI-3IS*, DI-A3, and DI-A3H
End-of-line
device
observe
polarity
if applicable
Siemens Industry, Inc.
BuildingTechnologies Division
P/N 315-081943-19
of all facets of the area being protected. Such factors as air
currents, temperature, humidity, pressure, and the nature of
the load have been carefully considered. Especially noted have
been the room or area configuration and the type of ceiling
(sloped or flat, smooth or beamed). Siemens Industry, Inc.'s
extensive experience in the design of the system assures the
optimum detector placement and is reflected in these drawings.
Sound engineering judgment by qualified personnel must
prevail.
TO AVOID NUISANCE ALARMS:
DO NOT locate the DI-3, DI-3H, or DI-3IS detectors where
excessive smoke concentrations exist under normal conditions
or in areas of prolonged high relative humidity where
condensation will occur.
DO NOT locate the DI-3, DI-3H, or DI-3IS detectors adjacent
to an oil burner, kitchen, or garage where exhaust fumes could
trigger an alarm. Other causes of false alarms are dust
accumulation, high wind velocity, heavy concentrations of
steam, heavy pipe or cigar smoke, and certain aerosol sprays.
DO NOT locate the DI-A3 or DI-A3H detectors in an area of
prolonged high relative humidity when condensation will occur
or adjacent to oil burners or in garages, where exhaust fumes
could trigger an alarm.

2
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, the movement
of air must be considered in the design of the system. While
combustion products tend to rise, drafts from hallways, air
diffusers, fans, etc., may aid or hinder the travel of combustion
products to the detector. When positioning a detector at a
particular location, consideration must be given to windows
and doors, both open and closed, and to influencing air
movement. A detector should never be installed in the air
stream of a room air supply diffuser. It may be advantageous
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 average ceiling height (8 to
10 feet), this will not be an abnormal factor. Height should be
taken into account, however, for high ceilings such as in
churches, warehouses, auditoriums, etc.
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. 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 Models DI-3, DI-3H, DI-3IS, DI-
A3, and DI-A3H is 32oF (0oC) to 100oF (37.8oC). The four
models can each be used in environments where the humidity
does not exceed 93% (non-condensating).
PRESSURE
Normal changes of atmospheric pressure due to changes in
weather 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
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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.
DI-3IS ONLY—Use in hazardous atmospheres. The DI-3IS
is approved by Factory Mutual to protect areas identified as
Class I, Division 1, Groups A, B, C, and D. The intrinsically
safe operation requires the use of a diode shunt barrier for
System 3 applications or a DC Isolator for MXL CZM-1/-1B6
applications. For System 3 applications refer to the Model
515-180238 Installation Instructions, P/N 315-091465. For
MXL CZM-1/-1B6 applications, refer to the CZM-1 Installation
Instructions, P/N 315-090725 or the CZM-1B6 Installation
Instructions, P/N 315-095355, as applicable.
DETECTOR WIRING
Siemens Industry, Inc., detectors should be interconnected
as shown in Figure 1 and wired to the control panel by
following the Wiring Connection drawing installed on the
inside face of each control panel cover. Duplicate wiring
information is also contained in the Installation, Operation,
and Maintenance manual provided with every control panel.
Note should be made of any limitations on the number of
detectors permitted on each circuit. Quantities may vary,
based on the specific type of response designed into the
system (fan shutdown, door closing, external relay tie-in,
extinguishing system discharge, etc.).
DETECTOR MOUNTING
The detector is provided with a separate base which attaches
to a standard 4 inch square, 4 inch octagonal, or single
gang outlet electrical box. The depth of the box is determined
by the National Electrical Code for the number and size of
the conductors used.
TO MOUNT:
• Route all wires outward
from outlet box.
• When the alarm LED
viewing is critical,
position the LED mark in
the base in the intended
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.
• After all bases are installed, including the end-of-line
device, check loop continuity. (Refer to system operation
manual for procedure.) To make the continuity check, a
jumper is furnished in every base (between terminals 1a
and 1b) to complete the loop (See Figure 2). An open cir-
cuit condition exists until the jumper or detector is installed
in the base.
Figure 2

3
• If loop continuity is acceptable, remove jumper at each
detector location and proceed with detector head
installation.
NOTE: To insure proper installation of the detector head into
the base, be sure wires are properly dressed at installation.
a. Position all wires flat against the base.
b. Take up all slack in the outlet box.
c. Route wires away from connector terminals.
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.
INSTALLATION OF DETECTOR HEAD
1. Align notch in detector cover to raised surface on outer
ring of base (See Figure 3).
Figure 3
2.Push detector head into base and rotate clockwise to
engage electrical connections. The detector will
automatically stop and lock into place.
3. To remove, push detector head up into the base while
rotating the detector head counterclockwise. Continue
to rotate counterclockwise until stop is reached. Then
pull downward to disengage from base.
DETECTOR SENSITIVITY
The normal sensitivity range of each Siemens Industry, Inc.,
detector can be found on the back of the detector. In general,
any condition which causes the detector sensitivity to
decrease to a value outside its normal sensitivity range is
approaching alarm and indicates that (a) a detector requires
cleaning, (b) a change in ambient or environmental conditions
has occurred, or (c) the detector is faulty.
The DI-3, DI-3H, and DI-3IS sensitivities are field adjustable.
Access to the sensitivity adjustment potentiometer is through
a hole located on the detector head face. The DI-3, DI-3H,
and DI-3IS sensitivity is adjustable ± 0.50 VDC of the nominal
factory setting. Adjustment towards “ + ” increases detector
sensitivity. Adjustment towards “ – ” decreases detector
sensitivity. Refer to Figure 4. The sensitivity of the DI-A3 and
DI-A3H detectors is factory set and is not field adjustable.
Figure 4
TESTING
Testing should be performed by qualified personnel. To
ensure that the DI-3, DI-3H, DI-3IS, DI-A3, and DI-A3H are
within factory-specified sensitivity limits, a sensitivity jack test
is provided to directly measure the sensitivity of the detector
in its mounted position while powered by the system. Access
to the sensitivity test jack is obtained through five holes
located on the front face of the detector (See Figure 4). Use
sensitivity tester Model TM-I3 to test. Refer to the sensitivity
test OPERATION MANUAL for Model TM-I3, P/N 315-
086641. Test frequency should be in accordance with
installation and test guidelines of NFPA Standard 72.
NOTE: To test for GO/NO GO operation, use SIEMENS
Test Gas, P/N 315-282747, following the
instructions on the label.
MAINTENANCE
Dust accumulations may cause a shift in detector sensitivity.
For this reason, it is important that each unit be given a
periodic check and a light cleaning if necessary. The minimum
test schedule may be found in the current edition of NFPA
72, Chapter 7 for installations in the U.S., and CAN/ULC-
S537, The Verification of Fire Alarm Systems, for installations
in Canada. Cleaning program intervals should be geared to
the individual detector environment.
Clean a detector by lightly brushing all open slots. You can
also clean a detector with the suction of a vacuum cleaner,
but the suction may cause the detector to alarm; therefore, it
is recommended that power be disconnected during cleaning.
The detectors are not designed for thorough cleaning in the
field. When the detector sensitivity falls outside the acceptable
limits for that detector, and cannot be brought back with
sensitivity adjustment (where applicable), replace the detector
head with an acceptable head. Send the removed head to
the nearest Siemens Industry, Inc. Authorized Service Center
for servicing.
CAUTION: UNDER NO CIRCUMSTANCES IS THE
DETECTOR HEAD TO BE DISASSEMBLED. NO FIELD
REPAIRS SHOULD BE ATTEMPTED. THE DETECTORS
ARE FACTORY REPAIRABLE ONLY.

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Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
P/N 315-081943-19Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario L6T 5E46 Canada