Brahma FC 7/R cell

PHOTOCELLS FLAME SENSORS FOR FUEL OIL BURNERS FC7 Introduction Flame detection in fuel oil burners occurs by means of sensors detecting the presence of flame through an electrical FC8 signal, which can be used by ignition and control devices. Generally, to detect the presence of flame in these appliances a photocell is used, which exploits the light generated by the flame itself. Description These are the most used flame sensors for fuel oil burners. Photocells vary their ohmic resistance according to the light FC9 incidence; this property is exploited to detect the occurred flame generation in burners. Various types of photocells are available, differing from each other in their application and casing. Fig.1 shows the FC7, FC8 and FC9 photocells; the difference between FC7 and FC8 models consists in the detecting element, which lights up laterally in the FC7 and frontally in the FC8. The FC9 photocell is suitable to be light up laterally; an inbuilt diode FC11 enables this photocell to be used with particular devices (for example Brahma 32CN ). Fig.2 shows the FC11, FC13 and FC14 photocells, differing from each other only in the fixing system, as both of them light up laterally and frontally. Fig.3 shows FC14 and FC14L photocells, differing from each other in the case length, even if both of them are able to be light up laterally and frontally. They are provided with a connection plug which facilitates assembly and maintenance operations. The standard length of the photocell connecting cable is FC13 600mm; the operating temperature range ensuring the longest life of flame sensors (approximately 50,000 hours) is comprised between 0°C and +60°C. FC14 FC14L Sensitivity The sensitivity of photocells can be identified through the colour of their casing, according to the following directions: /N Black /R Red /A Blue /V Green The colour red indicates photocells with standard sensitivity, the colour blue corresponds to the most sensitive photocells, whereas the colour green marks the least sensitive photocells. For the right coupling between photocell and control device please refer to our technical literature regarding control devices making use of these flame sensors. 4073_r01 1/2 Followings are the sensitivity ranges of the available flame - FC13 ∅17.5 sensors: FC7/R 1,5..5,5 lux Lateral side FC7/A 1,5..3,0 lux ∅8.5 FC7/V 3,0..5,5 lux 43 66.7 FC8/R 1,5..5,5 lux Fig.2 Frontal side FC8/A 1,5..3,0 lux - FC14 FC8/V 3,0..5,5 lux ∅ 17.5 FC9/N 1,5..5,5 lux 43,5 ∅8.5 Lateral side FC9/A 1,5..3,0 lux 61 FC9/V 3,0..5,5 lux - FC14L ∅17.5 Frontal and lateral side FC11/N 1,5..6,5 lux FC11/A 1,5..3,0 lux ∅8.5 100 Frontal and lateral side FC13/R 1,5..6,5 lux 117.5 FC13/A 1,5..3,0 lux Fig.3 Frontal and lateral side FC14/R 1,5..6,5 lux Drilling plane FC11 FC14/A 1,5..3,0 lux ∅8.5 Frontal and lateral side FC14L/R 1,5..6,5 lux FC14L/A 1,5..3,0 lux 17 17 34 FC7, FC8 e FC9 models - FC7 e FC9 FC13 and FC14 drilling plane (fastening system for the 5 4,4 6.9 19 mechanical interference with the photocell case) 2 46 34 ∅17 ∅14.2 17 15.6 24,5 34,7 46 - FC8 Ø4mm screws are recommended to fasten FC7, FC8, FC9 5 4,4 6.9 18,5 and FC11 flame sensors. 46 34 ∅17 Accessories 17 The cable for FC14 and FC14/L photocells is an accessory. 24,5 46.5 The standard cable length is 620mm (cables having different Fig.1 length are available upon request). Drilling plane FC7, FC8 e FC9 ∅17.5 17 17 The photocells can be provided upon request with a protection cap for the detecting element to protect it against 34 damage in case of impact FC11, FC13 e FC14 Models - FC11 5 4,4 29.8 12 ∅8.5 46 29.5 14.75 19 24.2…