FDD Heat Detector CR 135 Combination Rate-of-rise & Fixed Temp 57C/135F

Description

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Heat Detector CR 135 Combination Rate-of-rise & Fixed Temp 57C/135F
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The
Model CR 135
is a combination Rate-of-Rise and Fixed Temperature detector. A set of normally open contacts will close when the ceiling temperature increases at a (minimum) rate of 8.4 Celsius degrees (15 F. degrees) per minute. Closing the contacts initiates the fire alarm sequence. Independent of the rate-of-rise operation, the fixed temperature portion consists of a spring-loaded plunger retained by a fusible alloy that releases when the ceiling temperature reaches 57º C, (135º F). When  released, the plunger strikes the contacts and holds them closed. Spacing
on an uninterrupted ceiling is 70’ (22 m) for the rate-of-rise; 40’ (12.5 m) for Fixed Temperature portion.
Single Circuit Normally Open Contacts CR Aluminum Series
Features
low profile
Cast aluminum housing
Mounting flexibility with screw terminals
Single circuit with normally open contact configuration
Dimensions: Diameter 4.25 in (133 mm)
Height 2 in (51 mm)
Application
This heat detector is connected to a fire alarm system's input circuit as an initiating device. The internal contacts are normally open, and will close when the detector operates either on a rate of temperature increase, or if the releasing temperature is reached. It is often installed with an addressing module if it is to be annunciated as a specific room or space, e.g. electrical room, garbage compactor, etc. With its non-metallic diaphragm, the detector can operate normally at low temperatures, making it suitable for nonheated or chilled environments including garages and carports. Because it responds to a rate of temperature increase, it is recommended that it be used in conjunction with sprinkler devices as the detector will initiate and alarm before the waterflow switch. Low profile Cast aluminum housing Mounting flexibility with screw terminals Single circuit with normally open contact configuration
Weight: 0.41 lbs(0.19kg)
Shipping Weight: 0.6 lb (0.3 kg)