Installation Instructions

Fire Detection Devices Ltd., is an all-Canadian company that manufactures a complete line of Fire Alarm Heat Detectors for the world market. The THERMOFLEX product group includes standard detectors as well as detectors for hazardous locations and moisture proof applications. Each detector is available in single or multiple circuits with open and/or closed contact configurations. The prefix "CR" in the model number denotes rate-of-rise and fixed temperature operation. The prefix "CF" denotes fixed temperature only. The standard fixed temperature settings are 135 and 200 degrees F. however units set at 165 degrees F., and 285 degrees F., are also available.

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 57 degrees Celsius, (135 degrees F). When released, the plunger strikes the contacts and holds them closed.

The Model CR 200 is a combination Rate-of-Rise and Fixed Temperature detector that operates in the same way as the CR 135, with the exception that the fixed temperature portion releases when the ceiling temperature reaches 93 degrees Celsius, (200 degrees F).. Spacing parameters for the rate-of-rise is 70' (22 meters). Fixed Temperature portion is 25' (7.62 meters). The CR 200 is identified by a white dot on its heat collector fin.

The Model CF 200 is a Fixed Temperature Only detector. The fixed temperature portion releases when the ceiling temperature reaches 93 degrees Celsius, (200 degrees F). Spacing is 25' (7.62 meters). The CF 200 is identified by a black dot and a white dot on the heat collector fin.

Normally Closed Contacts Any Detector in this Series is available in Normally Open (the most common) or Normally Closed contacts. The Model Number does not reflect the Normally Open configuration, however the suffix "C" denotes Normally Closed, for example "CR 135 C" describes a rate-of-rise / fixed temperature detector, fusing at 135 deg. F., with Normally Closed contacts.

Engineering Specification: THERMOFLEX Model CR 135 automatic rate-of-rise heat detectors shall be installed in areas where ambient temperatures do not exceed 100 degrees F. In areas where ambient temperature is above 100 degrees F., but will not exceed 150 degrees F., specify CR 165 units. If ambient temperatures exceed 150 degrees F., specify CR200 or CF285. In areas where sudden increases in ceiling temperature are normal, specify Fixed Temperature Only units, with fusible settings of 135 degrees F., 165 degrees F., 200 degrees F., or 285 degrees F. The rate-of-rise operation responds to temperature increases of 15 degrees F., ( 8.4 degrees C.), per minute. THERMOFLEX detectors shall be installed in areas where environmental conditions including dust, vapours, insects, etc., would cause an ionization or photoelectric type detector to initiate a false alarm.

Dimensions: Diameter - 5.25" (13.4 cm) Height - 2.0" (4.85 cm) Weight: 0.41 lb. (330 grams).

All wiring must be installed in compliance with the local Electrical Code using approved cable, AWG 18 minimum. Begin electrical connections by stripping approximately 1" (2.5 cm.) from the end of each wire. Insert the stripped end into the wire-retaining hole in the terminal bar, wrap clockwise around the terminal screw, and tighten. Circuit wiring must be broken at each terminal to ensure proper supervision.