Datasheet Content
[{"filename":"133-721-Flame_Scanner_55UV5_Model_1010_English_2013-06-05.pdf","text":"\n\n\n 133-721\n MAY 6, 2013\n\n\n\n\n 3G-OTH-02850 SCANNER\n MODEL 1010\n\n\n\n\nNEMA 4X, IP66\nCLASS I, DIV 2, GROUPS A, B, C, D APPROVED\nCLASS II, CLASS III, DIV 2, GROUPS F and G\n\n This bulletin is directed to the licensed boiler service technicians and professional combustion\n engineers who are experienced in the installation and operation of Fireye flame safeguard\n controls. Persons not experienced with Fireye flame safety products should contact the nearest\n Fireye representative, or a qualified service group for assistance. IMPROPER INSTALLA-\n TION OF THESE PRODUCTS MAY BE HAZARDOUS TO LIFE AND PROPERTY.\n\n\nDESCRIPTION\n Fireye Type 3G-OTH-02850 scanners are self-checking, flame sensing devices. When powered by a compat-\n ible, self-checking Fireye control, the scanners detect the presence or absence of flames which emit\n ultraviolet radiation (UV). Typical fossil fuels which emit UV include natural gas, propane, meth-\n ane, butane, kerosene, light petroleum distillates and diesel fuels. For burners firing steam-atomized\n oil or pulverized coal, Fireye recommends the use of infrared (IR) scanners. Fireye offers a complete\n line of infrared scanners best suited for these applications.\n\n\nAPPLICATION\n When used with a Fireye amplifier, the 3G-OTH-02850 scanner provides flame failure protection on single\n and multi-burner industrial applications such as electric utility boilers, power boilers and large fur-\n naces or incinerators. The 3G-OTH-02850 scanner monitors the flame(s) of only one burner. The pilot and\n main flames may be monitored individually (2 scanners) or in combination (1 scanner). When prop-\n erly sighted, the scanner should discriminate between the burner being monitored and all other burn-\n ers and any background flames.\n\n Note: Scanner response is dependent on burner configuration as well as the turbulence and spectral\n characteristics of the flames. Application assistance is available on request.\n\n\n\n\n 1\n\f \n\n\n\n\nPRINCIPLES OF OPERATION\n The 3G-OTH-02850 scanner employs a detector which is a sealed, gas filled, ultraviolet-transmitting special\n glass envelope containing two electrodes connected to an AC voltage source. The detector responds\n only to a portion of the ultraviolet spectrum from common flames.\n When ultraviolet radiation of sufficient energy (at wavelengths shorter than those in sunlight at the\n earth’s surface) falls upon the electrodes, electrons are released and the inter-electrode gas becomes\n conductive. This results in an electric current flow from one electrode to the other.\n The current flow in the detector starts and ends abruptly and is known as an “avalanche.” A very\n intense source of UV radiation will produce several thousand avalanches or pulses per second. Less\n radiation will produce fewer pulses per second. Upon total loss of flame, the detector output ceases\n except for very infrequent single pulses caused by cosmic rays. The circuitry does not respond to\n these infrequent pulses. Thus, the presence or absence of pulses is an indication of the presence or\n absence of flame; the frequency of the pulses is a measure of flame intensity. Pulses generated by the\n scanner are transmitted to a compatible Fireye control via scanner wiring.\n\n\nFEATURES\n The UV tube, quartz lens, power transformer and related electronic components are contained in an\n aluminum enclosure which is sealed with an oil-resistant gasket. The quartz lens is a planoconvex\n design, resulting in increased sensitivity. The scanner has a 1\" fitting for mounting to a threaded sight\n pipe and a 3/4\" threaded connection for purge air.\n Also included in the Type 3G-OTH-02850 scanner is an electromagnetic shutter that permits a self-checking\n circuit within an associated Fireye control to verify that the scanner and signal circuits are producing\n valid flame presence or absence information. During the shutter closed period the detector’s optical\n path is blocked from flame radiation. While the shutter is open, flame presence or absence is\n detected. The resultant scanner output, while flame is detected, is a continuous, periodically inter-\n rupted pulsed flame signal. This is a prerequisite for energizing the associated Fireye control’s flame\n relay.\n The 3G-OTH-02850 scanner is equipped with a fitting to accept ½\" liquid-tight flexible conduit, and 20 feet\n (6 meters) of captive cable to connect to its associated 25SU3 or 25SU5 control.\n NOTE: The installation of liquid-tight flexible conduit is mandatory in all installations, and is\n furnished by the installer.\n\n\n\n\n2\n\f \n\n\n\nFIGURE 1. 3G-OTH-02850-1010 SCANNER DIMENSIONS\n\n 4.87\" (123.67mm) 7.39\" (187.58mm)\n\n\n\n 0.2\" (6mm)\n 2.07\" (52.45mm)\n 3.93\" (99.82mm)\n\n\n\n\n 1.18\" (29.85mm)\n\n\n\n 3G-OTH-02850-1000\n FLAME SCANNER 4.74\"\n (120.4mm)\n ®\n 1\" BSP THREAD\n NEMA 4X\n\n\n F IRE Y E\n D ER\n RY, NE WD E R\n RY\n M A ED IN US A\n\n\n\n\n 3/4\" BSP THREAD\n\n\n SPRING FASTENERS (2) FITTING FOR 1/2\" LIQUID-TIGHT\n FLEXIBLE CONDUIT (REQUIRED)\n TYPE 3G-OTH-02850\n 20 ft (6m) CAPTIVE CABLE\n\n\n\n CAUTION: Spring fasteners should be clipped and tightened to ensure a good bond to housing\n and maintain the integrity of the NEMA 4X rating.\n\n\n\nSPECIFICATIONS\n MOUNTING:\n Models are provided with 1\" female thread mounting, British Whitworth (BSP).\n\n HOUSING:\n Material Cast Aluminum with grey epoxy coat finish\n Environmental: NEMA 4X, IP66\n Weight:\n Temperature Rating:\n\n CONDITION MIN. MAX.\n Non-hazardous -40°F (-40°C) +199°F (93°C)\n Class I, Div 2, Groups A, B, C, D -40°F (-40°C) +140°F (60°C)\n Class II, Class III, Div 2, Groups F and G T6 Rating\n Using Anaconda 1/2\" Type H.V.T.A. liquid tight\n Class I, Div 2, Groups A, B, C, D -40°F (-40°C) +199°F (93°C)\n Class II, Class III, Div 2, Groups F and G T4A Rating\n Using customer supplied conduit or liquid tight connection\n Optical Range: 190 to 250 nanometers. No response to infrared radiation or visible\n light.\n\n ELECTRICAL:\n Power Requirement: 4 VA AC from associated Fireye control (see note below).\n Frequency: 60 HZ\n Electrical Connection: Flexible -conduit fitting and 20 ft (6m) of five conductor cable\n\n NOTE: Cable must be installed in 1/2\" liquid-tight flexible conduit.\n\n\n 3\n\f \n\n\n\n INTEGRAL CABLE SPECIFICATION:\n\n Individual Conductors\n Four (4) Conductors: #18 AWG (16x30) strand tinned copper\n Diameter: 0.110\" Nominal O.D.\n Colors: Green, White, Black and Red (Red not used)\n Two (2) Conductors: #22 AWG (7x30) strand tinned copper\n Diameter: 0.093\" Nominal O.D.\n Colors: Blue and Yellow\n Insulation Material: EXAR 150A .074\" nominal O.D.\n Cable:\n Jacket Material: EXAR 150A .074\" pressure extruded\n Wall Thickness: .045\" NOM.\n Finished Diameter: .418\" NOM.\n Temperature: -40°F (-40°C) to 257°F (125°C)\n\n\nTable 1:\n MODEL FREQUENCY MOUNTING FM\n 3G-OTH-02850 HZ THREADS\n\n 1010 60 BSP YES\n\n Specifications subject to change without notice.\n IMPORTANT NOTE: The AC power source must be sinusoidal for proper scanner operation.\n The application of any waveform other than a sine wave (e.g. square wave) will damage the\n 3G-OTH-02850 scanner.\n PURGE AIR\n Source: Clean ambient\n Volume: 4 SCFM (113 L/min. @ 4\" water column above furnace pressure minimum) at\n…
