Issue 2 Page 1 of 2
CONVENTIONAL DEVICES
Fire Detection DevicesCR/CF-EWT SeriesExplosion Proof Heat Detectors
SECUTRON INC.Canada 25 Interchange Way, Vaughan (Toronto), Ontario L4K 5W3 Telephone: (905) 695-3545 Fax: (905) 660-4113 • Web Page: www.secutron.com
U.S.A. 4575 Witmer Industrial Estates, Niagara Falls, NY 14305 Telephone: (888) 695-3545 Fax: (888) 660-4113 • E-mail: [emailprotected] Catalog Number 2022 • Not to be used for installation purposes.
Description
The CR/CF-EWT series of fire alarm Heat Detectors provide reliable fire detection in areas which are classified as hazardous. They are ULC listed for hazardous location Class I, Groups C and D; Class II, Groups E, F and G; Class III Weatherproof, Watertight and Dust-tight applications covered by Special Purpose Enclosures III, IV and V.
All heat detectors in the CR/CF-EWT series are single pole with normally open contacts. The body with its explosion proof cover is made from cast aluminium and houses a thermostat with colour-coded wire leads and sealed terminals. The finish is natural aluminium. Threaded outlets for ½” rigid conduit connections are provided.
Two combination rate-of-rise and fixed temperature models are available. Model CR-135-EWT is rated for 135°F (57°C). Model CR-200-EWT is rated for 200°F (93°). Maximum spacing for both models is 50 feet (15.2m).
Two fixed temperature only models are available. Model CF-135-EWT is rated for 135°F (57°C). Model CF-200-EWT is rated for 200°F (93°C). Maximum spacing for these models is 30 feet (9.1m).
Features
Class I Groups C & D•
Class II Groups E, F & G•
Class III•
Weatherproof, Water-Tight & Dust-Tight•
Special Purpose Enclosure - III, IV, V•
Wire Leads/Sealed Connection•
Rate-Of-Rise and/or Fixed Temperature•
Single Pole - Normally Open Contact•
Low Profile•
Operation
CR-135-EWT and CR-200-EWT Rate-of-Rise Models: A temperature increase at the detector of 15°F (9°C) or more per minute activates the rate-of-rise feature. This closes the contacts in the detector to transmits the alarm condition to the fire alarm control panel. When the rate-of- rise element alone has been activated, the detector is self-restoring.
CF-135-EWT and CF-200-EWT Fixed Temperature Models: If the temperature of the centre disk rises to the detector’s rated temperature, the fixed temperature element activates. This closes contacts in the detector and transmit the alarm condition to the fire alarm control panel. The fixed temperature element is non-restorable and when activated, the detector must be replaced. The need for replacement is indicated when the centre disk has fallen free from the detector
Page 2 of 2 Issue 2SECUTRON INC.Catalog Number 2022 • Not to be used for installation purposes.
Secutron reserves the right to make changes at any time without notice in prices, colors, materials, components, equipment, specifications and models and also to discontinue models.Modul-R® is a trademark of Secutron Inc.
Ordering Information
SpecificationsCatalogue Number CR135EWT CR200EWT CF135EWT CF200EWT CF285EWT
ULC Temperature Rating 135 °F (57 °C) 200 °F (93 °C) 135 °F (57 °C) 200 °F (93 °C) 285 °F (140 °C)
ULC Maximum AmbientTemperature at Ceiling
100 °F (38 °C) 150 °F (66 °C) 100 °F (38 °C) 150 °F (66 °C) 224 °F (107 °C)
Detector Operation Fixed Temperature and Rate-of-Rise Fixed Temperature Only
ULC RecommendedCoverage - see note A
2500 ft2 (232m2) 900ft2 (83m2)
ULC Recommended Spacing 50 ft (15.2m) 30ft (9.1m)
ULC Maximum Distance fromWall - see note B
25 ft (7.6m) 15 ft (4.6m)
ULC Approvals Listed for Hazardous Location Class I, Groups C and D; Class II, Groups E, F and G; Class IllWeatherproof, Water-tight and Dust-tight Applications covered by Special Purpose EnclosuresIll, IV and V
Other Approvals C.S.A.; UL
Contacts Single Pole Normally Open - Rated at: 3.0 amps at 6 to 125V ac; 1.0 amps at 6 to 28V dc; 0.3amps at 125V do; 0.1 amp at 250V dc
Note A - Maximum detector coverage has been determined by ULC to provide detection time equal to sprinkler devices spaced at 10 ft.(3m) intervals on a smooth ceiling 15 ft 9 in. (4.8m) high. Higher ceilings can adversely affect detection time. In some Instances.earlier detection time may be obtained by reducing the spacing between the detectors. Refer to the latest edition of CAN/ULC-S524. Standard for the Installation of Fire Alarm Systems, section on Heat Detectors.
Note B - Maximum distance shown is from any wall partition or ceiling projection extending down more than 12 inches (305mm).
Typical Wiring
Model DescriptionCR-135-EWT Rate of Rise & Fixed Temperature 135°F Explosion Proof Heat Detector
CR-200-EWT Rate of Rise & Fixed Temperature 135°F Explosion Proof Heat Detector
CF-135-EWT Fixed Temperature 135°F Explosion Proof Heat Detector
CF-200-EWT Fixed Temperature 135°F Explosion Proof Heat Detector
