April 1, 1998 Detectors Conventional Initiating Devices Fire HD622) (HD621, HD601, HD602) (HD603, HD604) (HD622, HD623) (HD624) HD-600 Heat Detector is attractive, durable, and fea- combination rate-of-rise and fixed-temperature de- Heat detectors are available in 135(cid:176)F (57(cid:176)C) and (94(cid:176)C) temperature ratings. elements detect heat by quickly responding to temperature increase. HD-600 detectors use the reliable pneumatic rate-of-rise element used in former but offer added aesthetic appeal. The pneumatic element responds to a rapid rise in tempera- approximately 15(cid:176)F (8(cid:176)C) per minute, by expansion air within the sealed chamber faster than it can escape a calibrated vent. The resultant increase in pres- depresses the diaphragm, causing the electrical con- to close the circuit. HD-600 rate-of-rise units have a spacing allowance of 50-foot (15.24-meter) centers. Specifications table (page 2) for details. elements react to heat by responding a specific temperature setting. The fixed-temperature uses a fusible alloy. When activated, the external collector drops away to provide quick visual confirma- that the element has operated. units protrude only 1-3/8″ (34.925 mm) from the ceil- surface with a junction box mounting. They have pleas- contours and an all-white finish that conforms to ceiling Rate-of-rise and fixed-temperature. One- or two-circuit, normally open. Easy installation. Low-profile design. Visual indication. Operation testing. detector includes a patented reversible mounting In one position, it easily attaches to a 3-1/4″ (82.55 octagonal box or 4″ (101.60 mm) junction box. reverse, the plate can be used for open wiring without a box. A 1/4″ (6.35 mm) space between detector mounting surface allows for wire connections. All screws are concealed. detector attaches simply to the mounting plate with a and twist motion. No special tools are required. mounting plate is molded of white self-extinguishing rated at 105(cid:176)C. The plate is extremely strong, adapts to uneven mounting surfaces. document is not intended to be used for installation purposes. We try to keep our information up-to-date and accurate. We cannot cover all specific applications or all requirements. All specifications are subject to change without notice. For information, contact Fire(cid:149)Lite. Phone: (203) 484-7161 FAX: (203) 484-7118 Clintonville Road, Northford, Connecticut 06472 and Manufacturing System Certified to Standard ISO-9001 in the U.S.A. (cid:151) Page 1 of 2 SERIES TESTING METHODS Models HD-601/HD-621 and HD-602/HD-622 can be tested by the application of quick heat from any convenient A portable hair dryer is recommended. However, do not apply heat that exceeds the fixed-temperature rating the detector. Models HD-603/HD-623 and HD-604/HD-624 cannot be tested. However, the fusible alloy element is generally con- so reliable that testing is not necessary.