Emerson UVU-140A - Manuals

3 1A @ 30Vdc 0.5A @ 125Vac < Response Time: Response to a saturating (high intensity) UV source is typically 10 milliseconds Alarm response time is programmable < Time Delay Settings: DIP switch selectable 3, 4, 5 or 7 seconds < Sensitivity Settings: DIP switch selectable 8, 16, 24 or 32 co...

4 Figure 2 - Detector cone of vision C H A P T E R 2 IN S T A L L A T IO N What’s in the package Remove all the components from the packing box(s) carefully; check components against the packing list. Inspectall components for obvious damage and broken/loose parts. Notify the carrier and distributor...

5 between the detector and the sources of potential fires. Small concentrations of these types of gases may notabsorb enough UV radiation to cause a problem, but when higher concentrations of these gases are present thedetectors may become blind as not enough ultra-violet radiation can reach them to...

6 Figure 3 - Detector with Swivel Mount metre) below the ceiling where they may respond before being obscured by smoke. Considershortening time delay settings when smoke is expected to accumulate during a fire. If dense smoke islikely to accumulate prior to flame (as in an electrical fire), suppleme...

7 F i g u r e 7 - J B 4 - U V - T J u n c t i o n B o x T o p V i e w Figure 5 - Swivel Mount Dimensions F i g u r e 4 - D e t e c t o r D i m e n s i o n s F i g u r e 6 - J B 4 - U V - T J u n c t i o n B o x S i d e V i e w

8 General Wiring Requirements NOTE: The wiring procedures in this manual are intended to ensure proper functioning of the device undernormal conditions. However, due to the many variations in wiring codes and regulations, totalcompliance to these ordinances cannot be guaranteed. Be certain that all ...

10 F i g u r e 9 - W i r i n g f o r U V U - 1 4 0 - A R Wiring Diagram for UVU-140-AR NOTE: If the 4-20 mA signal is not used connect it to (- ) - 24Vdc “system common”

11 F i g u r e 1 0 - D I P s w i t c h o p e r a t i o n a n d l o c a t i o n Detector Settings System Sensitivity The UV tube count rate generated by different fires at the same distance is unpredictable. Generally if a firedoubles in size, the tube response is increased by about 60 percent. The U...

12 Table 3 - Coil and Relay Status C O IL A N D R E L A Y S E T T IN G S T A B L E S w itc h 1 S w itc h 2 D e -e n e r g iz e d a n dn o n -la tc h in g O N O N E n e r g iz e d a n d n o n -la tc h in g O N O F F D e -e n e r g iz e d a n dla tc h in g O F F O N E n e r g iz e d a n dla tc h in g ...

13 Manual vi Test Procedure The detector has a manual vi input. The manual vi test is performed by connecting this input to the system powerfor the duration of the test. This can be done by connecting a momentary contact pushbutton between systempower and the manual vi input, and then holding the pu...

14 The UVU-140-A or UVU-140-AR current output will change with the amount of ultraviolet light beingdetected (see Table 4 ). 2. Turn off the UV test lamp. 3. Repeat steps 1 & 2 for all detectors in the system. 4. After all detectors have been checked, return the system to the normal operating mo...

15 C H A P T ER 5 M A IN T E N A N C E Routine Maintenance The UVU-140-A & UVU-140-AR fire detectors require no periodic calibration. To maintain maximum sensitivity,the viewing window and reflector should be cleaned on a routine basis depending on the type and amount ofcontaminants in the area....

16 Device Repair and Return The UVU-140-A and UVU-140-AR fire detectors are not designed to be repaired by the customer in the field. If aproblem should develop, first carefully check for proper wiring and programming. If it is determined that theproblem is caused by an electrical malfunction, the u...

18 A p p e n d ix B C o m m o n U ltra -V io le t A b so rb in g G a se s Since the UVU -140-A & UVU-140-AR fire detectors are designed to detect fires by responding to the ultra-violet(UV) radiation they emit, it is very important to be aware of UV absorbing gases that may be present between th...

19 A p p e n d ix C W ire R e sista n c e In O h m s D ista n ce (F e e t) A W G # 2 0 A W G # 1 8 A W G # 1 6 A W G # 1 4 A W G # 1 2 A W G # 1 0 A W G # 8 1 0 0 1 .0 2 0 .6 4 0 .4 0 0 .2 5 0 .1 6 0 .1 0 0 .0 6 2 0 0 2 .0 3 1 .2 8 0 .0 8 0 .5 1 0 .3 2 0 .2 0 0 .1 3 3 0 0 3 .0 5 1 .9 2 1 .2 0 0 .7 6...