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MAINTENANCE The 2400 Series has been designed to seal the sensing cham- ber from back-pressure air flow, dust, dirt, and insects. The back of the detector is sealed. The chamber is protected by a fine mesh screen. Testing is accomplished by insertion of a 0.1" (2.54 mm) max. diameter tool. If cleaning is required, it is easy to remove the cover and obtain access to the screen and chamber to perform a thorough cleaning. ENGINEERING SPECIFICATIONS Smoke detector shall be a photoelectronic type (model 2400) or a combination photoelectronic/thermal (model 2400TH) with thermal sensor rated at 1350F (57"C) as manufactured by Sys- tem Sensor. Wiring connections shall be made by means of SEMS screws. The detector will have a visible LED which will blink in standby and latch on in alarm. The detector shall have a nominal sensitivity of 3% per foot as measured in the UL smoke box. The detector screen and cover should be easily remov- able for cleaning. It shall be possible to perform a sensitivity and functional test without the need of generating smoke. De- tector circuitry shall perform a self test on the sensing chamber and internal electronics every 40 seconds. If circuitry fails, the detector LED shall stop blinking. The detector shall have a mounting bracket that allows for mounting to a 3-1/2" (88.9 mm) or 4" (101.6 mm) octagonal or a 4" square electrical box. GENERAL SPECIFICATIONS Model 2400 Control Panel Applications Built-in Thermal Visual LED Local Alarm Remote LED Annunciator Capability Operating Voltage Range Current Limit, Standby (maximum) Current Limit, Alarm (typical) 2-wire No Yes Yes 8.5 to 35 VDC 120 IJA (see NOTE 1) (see NOTE 1) Current Limit, Alarm (maximum) Reversed Voltage (non-alarm) Alarm Signal Shunt on power leads. T Wiring Diagram: 2400, 2400TH, 2400AT 1190d1.wmf (-) EOl Resistor (+) (+) RA40QZ I .." .." (-) (-) OPTIONAL OPTIONAL - -- - - -~- - - - - - - -- - - - - - - - - - - - - - - - - -- - - - - - - - - --- --- - - - - - -- - - - - - - - - -- - - --- - - - - - -- OPTIONAL CLASS 'A" LOOP Page 2 of 2 - DA-44061 . 07/27/00 PRODUCT LINE INFORMATION Model 2400 Description Photoelectric smoke detector, two-wire, surface mount. Photoelectric smoke detector with built-in 1350F (570C) fixed-temperature thermal, two-wire, sur- face mount. Photoelectric smoke detector with integral 1350F (57"C) fixed-temperature thermal, and 85 dBA horn, two-wire, surface mount. Photoelectric smoke detector with isolated 1350F (57"C) fixed-temperature thermal, and 85 dBA horn, two-wire, surface mount. Field-test module for all of the System Sensor 2400 Series smoke detectors. Remote annunciator (LED). Mounts to single- gang box. 2400TH 2400A T 2400AIT MOD400R RA400Z NOTES for GENERAL SPECIFICA TIONS: 1) Control panels must limit current to 100 mA or less. 2) Maximum air velocity for photoelectric sensor operation is 3,000 feet (914.4 m) per minute. 3) Relative humidity range: 10 to 93% (non-condensing). Model 2400TH 2-wire Yes Yes Yes 8.5 to 35 VDC 120 IJA (see NOTE 1) (see NOTE 1) Model 2400AT Model 2400AIT 2-wire 2-wire Yes Yes (Isolated) Yes Yes Yes Yes 10 to 32 VDC 10 to 32 VDC 120 IJA 120 IJA 15mA@10V 15mA@10V 67 mA @ 32 V 67 mA @ 32 V 48 mA @ 24 V 48 mA @ 24 V 5mA@10V 5mA@10V 15 mA @ 24 V 15 mA @ 24 V 19 mA @ 32 V 19 mA @ 32 V Shunt on Shunt on power leads. power leads. 119011.tbl Shunt on power leads. T Wiring Diagram: 2400AIT 1190d2.wmf (-) SMOKE DETECTION LOOP EOL Resistor THERMAL DETECTION LOOP