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.
Building Technologies 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.

Siemens DI-3 Specifications

General

Brand	Siemens
Model	DI-3
Category	Smoke Alarm
Language	English

Summary

Detector Placement

Detector Spacing Guidelines

Use 30-foot spacing as a guide, considering ideal conditions and specific applications.

Nuisance Alarm Prevention

Avoid locations with high humidity, dust, steam, or exhaust fumes to prevent false alarms.

Air Currents

Airflow Impact on Smoke Travel

Consider air currents from diffusers, windows, and doors affecting smoke detection.

Ceiling Height Considerations

Account for ceiling height, especially in large spaces, for smoke travel distance.

Special Ceiling Construction Factors

Obstruction Impact on Airflow

Account for beams, joists, and ducts that may alter smoke and air movement.

Temperature and Humidity

Operating Environment Limits

Detectors operate between 0-37.8°C and up to 93% humidity (non-condensing).

Pressure

Altitude Effects on Sensitivity

Lower air pressure at higher altitudes may affect ionization detector sensitivity.

Applications

Model Specific Applications

Details on model suitability for open areas, computer facilities, and air ducts based on velocity and altitude.

Special Note - High Stockpiling

Spacing for High Stockpiling

Requires closer spacing and tiered locations based on stock, height, and judgment.

DI-3IS Only

Hazardous Atmosphere Use

DI-3IS is for Class I, Division 1 areas; requires specific barriers or isolators.

Detector Wiring

Interconnection and Control Panels

Detectors connect per diagrams; follow panel wiring instructions and check detector limits.

Detector Mounting

Base Installation and Wiring

Route wires, position LED mark, mount base, and make terminal connections.

Loop Continuity Check

Ensure loop continuity after base installation, using a jumper for testing.

Detector Head Installation

Aligning and Securing Head

Align notch, push head into base, and twist clockwise to engage connections.

Removing Detector Head

Push head up and rotate counterclockwise to disengage from the base.

Detector Sensitivity

Sensitivity Adjustment

Field adjustable for DI-3/DI-3H/DI-3IS; adjust towards '+' for increased sensitivity.

Factory Set Sensitivity

DI-A3 and DI-A3H detectors have factory-set sensitivity and are not field adjustable.

Testing

Sensitivity Test Procedure

Use Model TM-13 tester via sensitivity jack for testing within factory limits.

Go/No Go Test Gas

Use SIEMENS Test Gas P/N 315-282747 for GO/NO GO operation testing.

Maintenance

Cleaning Detectors

Gently brush or vacuum slots; disconnect power before cleaning if using suction.

Sensitivity Adjustment and Replacement

Adjust sensitivity; replace head if outside limits. Do not disassemble detectors.

Compatible Control Equipment

Non-Intrinsically Safe Models

Lists compatible control equipment for DI-3, DI-3H, DI-A3, and DI-A3H models.

Intrinsically Safe Model DI-3IS

Lists compatible control equipment for DI-3IS FM Approved model.