Instructions 95-8331-02 UVIR Flame Detection System R7495 Dual Channel Controller C7052J Detector Detector Electronics Corporation 6901 West 110th Street • Minneapolis, Minnesota 55438 USA Tel: 952.941.5665 or 800.765.3473 • Fax: 952.829.
Table of Contents APPLICATION ................................................................1 FEATURES .....................................................................2 SYSTEM DESCRIPTION................................................2 Detector....................................................................2 Controller..................................................................3 SPECIFICATIONS ..........................................................5 OPTIONS .............................
DET-TRONICS INSTRUCTIONS ® UV/IR Flame Detection System R7495D Dual Channel Controller C7052J Detector NOTE Not compliant to FM 3260 (2000). APPLICATION The R7495D/C7052J UV/IR Flame Detection System is designed to provide continuous and automated fire protection in applications where the use of ultraviolet (UV) or infrared (IR) detectors alone can result in unwanted (false) alarms.
The IR sensor is sensitive to IR radiation over the range of 4.2 to 4.7 microns. See Figure 1. It is not sensitive to radiation from the sun, lightning, x-rays, gamma rays, or arc welding. However, it will respond to fire and flickering blackbody (heat) radiation sources. IR radiation is generated by a hydrocarbon flame, which reaches the detector in pulsations or “flicker.” These pulsations are present in all flames and are created by turbulent mixing of fuel with air.
between 18 and 32 volts. The unit will tolerate transients such as those that can occur when fully discharged batteries are placed on charge. When power is present at the R7495D Controller, it is indicated by a continuously energized green LED. All other lights and displays on the R7495D front panel are normally off, but may be periodically checked for operation by pressing the RESET/LAMP TEST button located directly below the POWER light as illustrated in Figure 3.
2. The FIRE ZONE LEDs signal actuation of the corresponding fire (timed) relay outputs. “Alarm” and two as “Fire.” Alarm relays 1 and 2 are directly controlled by detectors 1 and 2, respectively. When either detector generates a fire signal that lasts for two consecutive gates (regardless of the number of gates that the controller has been programmed for): 3. Illumination of the ALARM LED indicates actuation of an alarm (instant) relay output. 4.
various faults that could prevent the system from responding in the event of a fire. If a fault is detected: 100% REPRESENTS THE MAXIMUM DETECTION DISTANCE FOR A GIVEN FIRE. THE SENSITIVITY INCREASES AS THE ANGLE OF INCIDENCE DECREASES. 0° 15° 1. The normally energized fault relay is de-energized. This relay can be used to activate an external fault annunciation device or to remove power from a hazardous process. 30° 100 15° 90 30° 80 45° 45° 70 60 2.
sealed inside the relays to eliminate arcing and corrosion, thereby increasing reliability. C7052J Detector Aluminum: 6.0 pounds (2.7 kilograms). Stainless Steel: 14.0 pounds (6.4 kilograms). CONTROLLER TEMPERATURE RANGE— Operating: +32°F to +140°F (0°C to +60°C). Storage: –40°F to +140°F (–40°C to +60°C). OPTIONS Power supplies are available for operating the R7495D and C7052J from line (mains) voltage. DETECTOR TEMPERATURE RANGE— Operating: –40°F to +167°F (–40°C to +75°C).
2 INCHES (50 MM) 10.0 INCHES (254 MM) 7 INCHES (177 MM) A1020 Figure 6—Controller Dimensions in Inches (Millimeters) JUNCTION BOX MOUNTING vidual application, taking into account all possible variBRACKET (ATTACHES WITH TWO ENCLOSED ables (see the Application Guidelines” section for a disFLATHEAD SCREWS) cussion of of these factors).
tion must be avoided. For example, if IR radiation with an intensity that exceeds the fire threshold of the IR sensor should reach the detector as a flickering signal, and if at the same time an electric arc welding signal also reaches the sensors, an alarm output will be generated. The C7052J ignores arc welding beyond 15 feet from the detector.
its central axis. Refer to Figure 4. Careful observation of this graph reveals that at 50 percent of the maximum detection distance, the cone of vision is still 80 degrees. As the detection distance increases beyond 50 percent, the cone of vision gradually decreases. For example, the C7052J will detect a 1 foot by 1 foot gasoline fire at 50 feet. Therefore, we can assume that at 25 feet (50% maximum distance) the cone of vision will be 80 degrees.
Moisture in the air can be trapped within sections of conduit and can condense and accumulate at the base of vertical conduit runs. To eliminate this condition, explosion-proof drains and breathers should be installed to automatically bleed off accumulated water. WIRING REQUIREMENTS The system should be wired using four conductor shielded cable, at least 18 gauge (1.024 mm diameter).
*oi TEST LAMP (2) UV SENSOR HOUSING oi TEST LAMP IR SENSOR HOUSING CONDUIT SEAL REQUIRED WITHIN 18 INCHES OF DETECTOR. DETECTOR MUST BE ORIENTED WITH CONDUIT ENTRY AT BOTTOM OR SIDE TO ELIMINATE DRAINAGE INTO JUNCTION BOX. A1462 oi RING OPENING DOWN *oi TEST LAMPS AT TOP OR SIDE Figure 10—Front View of the C7052 Detector 2. Remove the junction box cover assembly from the base by loosening the six screws on the cover (see Figure 12). 3.
JUNCTION BOX JUNCTION BOX COVER MOUNTING PIN IR SENSOR MODULE IR TEST LAMPS (2) UV TERMINAL BLOCK INDEX PIN O-RING UV SENSOR MODULE IR SENSOR HOUSING UV TEST LAMP OPENING IR oi RING O-RING UV SENSOR HOUSING UV oi RING F0946 Figure 12—C7052J Detector Part Identification +24 VDC (A) OUTPUT SIGNAL (B) D0947 CIRCUIT GND (C) oi SIGNAL (D) EARTH GND Figure 13—Detector Terminal Block 14
DETECTOR NO. 1 J1 A 1 + 2 – B 8. Determine the proper orientation for the UV module by lining up the long index pin on the terminal block with the hole in the printed circuit board of the module. See Figure 12. Firmly press the module into place on the terminal block, taking care not to touch the glass envelope of the sensor module, since fingerprints can absorb UV radiation and reduce the sensitivity of the sensor. 24 VDC POWER SUPPLY C7052J C D 0.
NOTE The two oi lamps on the DE5500 IR sensor should be at the top or side of the detector (when viewed from the front) and the opening on the o i ring should be at the bottom. See Figure 10. This will ensure proper operation of the oi system and also minimize the accumulation of moisture and contaminants between the oi ring and the viewing window. (The oi lamps on the IR sensor are identified as oblong in shape and clear in color.) 10.
. If the detector is so equipped, install the air shields on each sensor housing, then connect the air supply line to the air shields. ELECTRICAL CONNECTIONS All electrical connections are made to the field wiring connector that is furnished with the controller. Figure 19 shows the terminal configuration for the controller. Power to the R7495D Controller and C7052J Detectors may be furnished by external 24 volt batteries, a regulated dc power supply, or optional Det-Tronics voltage converters.
+24 VDC INPUT FIRE RELAY NO. 1 FIRE RELAY NO. 2 ALARM RELAY NO. 1 ALARM RELAY NO.
SWITCH ASSEMBLY 1 DETECTOR SELECTION SWITCH PLACE ROCKER IN OPEN POSITION FOR EACH CHANNEL WITH A DETECTOR CONNECTED NOTE 1: ROCKER SWITCH NUMBERS ARE DESIGNATED 1-1, 1-2, 1-3, ETC. THE NUMBER PRECEDING THE DASH INDICATES THE SWITCH ASSEMBLY. THE NUMBER FOLLOWING THE DASH INDICATES THE ROCKER NUMBER. NOTE 2: DEPRESS ROCKER TOWARD "OPEN" ON SWITCH ASSEMBLY TO SET IN THE OPEN POSITION. DEPRESS ROCKER TOWARD NUMBER DESIGNATIONS TO SET IN CLOSED POSITION.
R7495 STAR Logic Program R7495 Switch Settings Rockers Closed Rockers Open 4 Counts per Gate 3-3 3-1, 3-2, 3-4 0.25 Second Gate Length 2-4 2-1, 2-2, 2-3, 2-5, 2-6, 2-7, 2-8 4 Consecutive Gates 3-7 3-5, 3-6, 3-8 STAR LOGIC (TYPICAL SETTINGS SHOWN) C7052J 4 CONSECUTIVE GATES 0.25 SECOND GATE LENGTH COUNT (SIGNAL) 4 COUNTS PER GATE FLAME CONTROLLER ALARM CONDITION SIGNAL A1708 Figure 21—Graphic Representation of STAR Logic (Typical Settings Shown) Rocker 2-1 - 31.
When a gate length of 0.5 second or greater is used, the programmed counts per gate value is multiplied by a factor that is determined by the gate length that has been programmed using rocker switches 2-5 to 2-8. Refer to Figure 22 to determine the proper multiplication factor. Note that the multiplication factor is determined by the highest numbered rocker switch in the closed position. ers closed are added together.
SWITCH 2 GATE LENGTH (SECONDS) ROCKER OPEN CLOSED 1 – 0.031 2 – 0.062 SWITCH 1 DETECTOR SELECT ROCKER OPEN CLOSED OPEN 3 3 – 0.125 2 4 – 0.25 3 1 2 1 4 5 6 4 5 – 0.5 6 – 1.0 7 – 2.0 8 – 4.
(+)H LOAD (–)N FAULT ALARM PROCESS CONTROL 17 18 19 20 21 22 23 24 25 26 ALARM RELAY NO. 1 5. After all detectors have been checked, reset the system by placing the Mode switch in the NORMAL position. All LEDs except the POWER LED are off. FAULT RELAY 6. Restore power to the output loads and remove any mechanical blocking devices.
Remove the oi rings by squeezing the tabs together and pulling away from the detector. Clean the viewing windows thoroughly, all the way to the edge. Also clean the reflective surface of the oi rings (the surface of the ring that faces the detector viewing window). When reinstalling an oi ring, hold it by its tabs to avoid leaving fingerprints on the reflective surface. Re-install the ring so that the opening is pointed down to prevent a buildup of contaminants.
Table 3—Troubleshooting Guide Indication Status FAULT LED on Mode switch in Test position, external reset activated, or fault in controller circuitry. FAULT LED and a DETECTOR LED on oi fault - the oi ring and/or the window of the detector indicated by the DETECTOR LED is dirty, the detector tube module has lost sensitivity or is missing, or there is an open or shorted wire between that detector and the controller.
The following options can be substituted for the item in bold: 1 2 3 RECOMMENDED SPARE PARTS or: “in a 316 stainless steel enclosure.” or: “25 mm” or: “flame-proof for EEx d IIB. The device shall be rated IP66 (dust-tight/water-tight). The detector shall be BASEEFA/CENELEC certified.” or: “explosion-proof for Class I, Division 1, Groups C and D; Class II, Division 1, Groups E, F and G. The device shall be rated NEMA 4 (dust-tight, watertight). The detector shall be CSA certified.
