User Manual

ManualsBrandsSiemens ManualsFire - Detectors & PeripheralsDT-135R / DT-135F / DT-200R / DT-200F Thermal Fire Detector, Data Sheet

Conventional Fire Detectors

6130

Building Technologies

Fire Safety & Security Products

CatalogSheet

FireSafety &SecurityProducts

Conventional Fire Detectors

Thermal Fire Detectors

Models DT-135R, DT-135F, DT-200R and DT-200F

Product Overview

The Siemens Building Technologies ─ Fire Safety

Division Thermal Fire Detectors are fixed

temperature or a combination of fixed-

temperature / rate-of-rise type. The combination

detectors consist of two, independently operated

thermal elements. The rate-of-rise element is

self-restoring. However, the fixed temperature

is of the non-restoring type.

Underwriter’s Laboratories, Inc., recommends

the combination-type thermal detector be used to

protect a maximum of 2,500 square feet (50-foot

spacing), and the fixed-temperature type be used

to protect a maximum of 625 square feet (25-foot

spacing). However, job conditions and

engineering judgment often dictate closer

spacing to provide faster detection.

The thermal fire detector shall be Fire Safety

Model ____ (insert number). It shall operate

at a temperature of ____°F (insert

temperature). The detectors shall be listed by

Underwriters’ Laboratories, Inc. and Factory

Mutual for use with Siemens Building

Technologies, ─ Fire Safety Division systems.

Specifications

Rate-of-Rise Principle of Operation

The rate-of-rise element consists of an air

chamber; a flexible, metal diaphragm and a

moisture-proof, trouble-free vent that is carefully

calibrated.

It is well known air expands as it is heated, and

will contract as it is cooled. For normal, day-to-

day fluctuations of temperature, the expansion

and contraction of the air within the chamber is

automatically compensated by the ‘breathing’

action of the vent.

However, when a fire occurs, air temperatures rise

very rapidly and the air in the chamber expands

faster than it can be vented. This creates a

pressure which distends the diaphragm and

closes electrical contacts.

The rate-of-rise action is not related to any fixed

temperature level, but responds with the utmost

promptness when the rate of temperature rise

exceeds 15°F per minute. If the heat is removed,

the air within the chamber contracts and the

switch moves to a normally open circuit position.

• Listed

• FM Approved

Summary of content (2 pages)

PAGE 1
s Catalog Sheet Fire Safety & Security Products Conventional Fire Detectors Thermal Fire Detectors Models DT-135R, DT-135F, DT-200R and DT-200F • • Listed FM Approved Product Overview Specifications The Siemens Building Technologies ─ Fire Safety Division Thermal Fire Detectors are fixed temperature or a combination of fixedtemperature / rate-of-rise type. The combination detectors consist of two, independently operated thermal elements. The rate-of-rise element is self-restoring.
PAGE 2
Specifications ─ (continued) Installation Fixed Temperature Principle of Operation Each detector includes a thermoplastic, reversible mounting plate. In one position, it easily attaches to a 4" octagon junction box, 3" octagon box or plaster ring. In a slow developing fire, the temperature may not increase rapidly enough to operate a rate-of-rise element. Therefore, a fixed-temperature principle of operation is needed.