description the system sensor 1151 low profile ionization type smoke detectors are specifically designed to meet the performance requirements of fire detection/alarm systems. the 1151 ion - ization detector uses a state-of-the-art, dual unipolar sensing chamber. the detector is designed to provide open area de - tection and, when installed in a two-wire base, is compatible with fci fire alarm control panels. the detector?s operation and sensitivity can be tested in place. the 1151 detector is of plug-in construction and plugs into the same base as the system sensor 2151photoelectronic smoke detector, making both models interchangeable. bases are available for two-wire, four-wire, 120 vac four-wire op - eration and also with an audible sounder. two visible leds on each detector flash every ten seconds indicating that power is being applied to the detector. the leds light steadily when the detector is in alarm. a remote led annunciator is available as an optional accessory. the 1151 detector is listed for use inside ducts up to a ve- locity of 500 fpm. functional testing is performed by placing a test magnet against the cover. the led on the detector should light within 30 seconds. field metering of detector sensitivity may be performed with the aid of a voltmeter and test kit, mod 400r. approvals specifications sensitivity 1.9 %/ft. (nominal) operating voltage 15 - 32 vdc peak standby current 200 ua max. avg. operating temperature 32 to 120 o f(0to49 o c) relative humidity 10 to 93 % (non-condensing) air velocity 500 feet per minute maximum construction off-white flame retardant plastic diameter 4 inches (10.2 cm) height 1.7 inches (4.2 cm) weight 3.6 oz. (104 g) 1151 system sensor low profile, ionization plug-in smoke detector 9020-0582/ver. 1.1 16 southwest park, westwood, ma 02090 usa tel: (781) 471-3000 fax: (781) 471-3099 specifications are provided for information only, are not intended to be used for installation purposes, and are believed to be accurate. however, no responsibility is assumed by fire control instruments, inc. for their use. specifications subject to change without notice. ? 2003 all rights reserved features unique dual unipolar sensor provides exceptional stability low profile construction easy plug-in of the head to base tamper-resistant feature test switch 360 o view angle of alarm leds compatible with fci control panels audible sounder base (optional) field metering of detector sensitivity removable insect screen and cover for field cleaning insect-resistant screening (.020"/.508 mm openings) an iso 9001 certified company
mounting on a 4-inch square box with or without plaster ring. minimum depth 1.5 inches. on a 3.5-inch octagonal box. minimum depth 1.5 inches. installation place the detector into the detector base. turn the de - tector clockwise until the detector locks into place. to use the tamper-proof feature, break the smaller tab on the scribed line in the tamper proof tab located on the detector mounting bracket. install the detector. to re - move the detector from the base when using the tam - per-proof feature, insert the blade of a small screwdriver into the hole on the side of the base and push the plastic lever away from the detector head. this will allow the detector to be rotated counterclockwise for removal. note : the decorative ring must be re - moved in order to remove the head when using the tam - per-proof feature. the tamper-proof feature may be defeated perma - nently by breaking the plastic lever off the base. note : the number of two-wire smoke detectors which can be accommodated per zone varies with dif- ferent control panels. consult the control panel in- struction manual to determine the capacity. refer to nfpa 72, chapter 5-3, ?smoke sensing fire detectors? for spacing, location of detectors and other guidelines. testing detectors may be tested in the following ways: place a test magnet against the detector as directed in the installation instructions. the detector should go into alarm within 30 seconds. field metering of detector sensitivity may be performed with the aid of a voltmeter and test kit, mod 400r. for the complete procedure, refer to the installation and maintenance instructions furnished with each detector. maintenance cleaning programs should be adapted to the individ- ual environment. we recommend at least an annual cleaning of the unit. the detector screen and cover as - sembly can be removed, revealing the sensing cham - ber. a vacuum cleaner can be used to remove dust from the screen, cover and sensing chamber. for the com - plete procedure, refer to the installation and mainte - nance instructions furnished with each detector. 2of2 9020-0582 ordering and technical information model contacts description 1151 ionization detector b110lp base, two-wire b112lp form a & c base, four-wire, 24 vdc operation b114lp form a , c & supv. base, four-wire, 120 vac operation b401bh base, four-wire, with audible sounder RA-400Z remote alarm indicator pam-1 form b end of line relay, 24 vdc mod 400r test kit
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