Det-tronics R7495D UV/IR Flame Detection System Manual do Utilizador

Instructions 95-8331-02UVIR Flame Detection SystemR7495 Dual Channel ControllerC7052J DetectorDetector Electronics Corporation6901 West 110th Street •

Potential radiation sources in the environment must alsobe carefully considered. A UV sensor will respond tosources of UV besides fire, such as elect

INSTALLATIONDETECTOR POSITIONINGWhen determining the proper number and positioning ofdetectors needed for adequately protecting any giveninstallation,

WIRING REQUIREMENTSThe system should be wired using four conductorshielded cable, at least 18 gauge (1.024 mm diameter).The length of cable should be

2. Remove the junction box cover assembly from thebase by loosening the six screws on the cover (seeFigure 12).3. Mount the detector junction box ba

14Figure 13—Detector Terminal BlockD0947+24 VDC (A)OUTPUT SIGNAL (B)CIRCUIT GND (C)oi SIGNAL (D)EARTH GNDFigure 12—C7052J Detector Part Identification

a. Connect the B-lead shields to the chassisground connection (terminal 5) of the con-troller.b. Be certain that the shield is NOT connectedto the

10. If the IR sensors are the DE3895 type that electrical-ly connects directly onto the terminal block, installthem by lining up the connection pins u

17. If the detector is so equipped, install the air shieldson each sensor housing, then connect the air sup-ply line to the air shields.NOTEBe sure th

Terminal 4 — Do not use.Terminal 5 — Chassis GroundTerminals 6 to 11 — Relay contacts - Fire Relay No.1.Terminals 12 to 17 — Relay contacts - Fir

STAR Logic Programming (System Sensitivity andTime Delay) - Rocker Switches 2-1 to 2-8 (GateLength), Rocker Switches 3-1 to 3-4 (Count SelectionPer Ga

APPLICATION ...1FEATURES ...

If changes in the sensitivity and/or time delay settingsare required, read the detailed discussions of each ofthe three STAR Logic variables that foll

When a gate length of 0.5 second or greater is used, theprogrammed counts per gate value is multiplied by a fac-tor that is determined by the gate len

Figure 24 shows power connected to a load circuitthrough the normally closed contacts of the Alarm relay.When a “fire” signal is received by the contr

INITIAL AND PERIODIC CHECKOUTPROCEDUREThe entire system should be periodically checked with aUV/IR test lamp to be sure that the detectors are notobst

Remove the oi rings by squeezing the tabs togetherand pulling away from the detector. Clean the viewingwindows thoroughly, all the way to the edge.

DEVICE REPAIR AND RETURNPrior to returning devices or components, contact thenearest local Detector Electronics office so that an RMI(Return Material

The following options can be substituted for the item inbold:1or: “in a 316 stainless steel enclosure.”2or: “25 mm” 3or: “flame-proof for EEx d IIB

NOTENot compliant to FM 3260 (2000).APPLICATIONThe R7495D/C7052J UV/IR Flame Detection System isdesigned to provide continuous and automated fire pro-

FEATURES• Controller continuously monitors up to two UV/IRdetectors.• Ignores false alarm sources such as arc welding, x-rays, gamma radiation and rad

optical shield prevents the test beam from reaching thesensor directly. The test beam travels out through theviewing window, where it encounters the

2. The FIRE ZONE LEDs signal actuation of the corre-sponding fire (timed) relay outputs. 3. Illumination of the ALARM LED indicates actuationof an

various faults that could prevent the system fromresponding in the event of a fire. If a fault is detected:1. The normally energized fault relay is

sealed inside the relays to eliminate arcing and corro-sion, thereby increasing reliability.CONTROLLER TEMPERATURE RANGE—Operating: +32°F to +140°F

vidual application, taking into account all possible vari-ables (see the Application Guidelines” section for a dis-cussion of of these factors). Typic