Honeywell C7961E Product Data

Ultraviolet Flame Detector APPLICATION The C7961E,F are dynamic self-checking flame detectors for sensing the ultraviolet radiation generated by the combustion of gas, oil, or other fuels. FEATURES • Oscillating shutter interrupts ultraviolet radiation reaching the UV sensor at a 3 Hz rate to provide th ...

65-0267-09 2 ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information, or would like to comment on ...

3 65-0267-09 Fig. 1. Dimensions of C7961E in inches. (mm). Fig. 2. Dimensions of C7961F in inches. (mm). Accessories: C7961E: 118367A Swivel Mount. 123539 Antivibration Mount. 122748 Quartz Viewing Window, rated for 50 psi (345 kPa). 124204 Quartz Focusing Lens, rated for 20 psi (138 kPa); increases the ...

65-0267-09 4 Temperature Install the C7961 where the ambient temperature (outside the case) stays within the ambient operating temperature ratings. To keep the C7961 below its maximum rating, it may be necessary to add additional insulation between the wall of the combustion chamber and the detector. A s ...

5 65-0267-09 In most installations, the detector needs to respond to the pilot flame alone, then the pilot and main burner flame together, and finally the main burner flame alone. The detector must meet all sighting requirements that apply: • Pilot flame alone—the smallest pilot flame that can be det ...

65-0267-09 6 Mount Sight Pipe Thread one end of the pipe to fit the mounting flange, union, or required coupling. Cut the pipe to the desired length (as short as practical) and at an angle so it fits flush with the wall of the combustion chamber. Tack weld the pipe to the wall in a trial position. Do not ...

7 65-0267-09 IMPORTANT The notch and arrow on the faceplate must be aligned in a vertical plane with the notch up and the arrow pointing down. The housing must be mounted with the conduit opening approximately 45° below horizontal (see Fig. 6). To mount a C7961E (Fig. 8): 1. The mounting flange is in tw ...

65-0267-09 8 ADJUSTMENTS AND CHECKOUT For initial burner lightoff, consult the burner manufacturer instructions or the flame safeguard control instructions. Adjust Detector Sighting With the flame detector installed and the burner running, adjust the sighting position of the detector for optimum flame si ...

9 65-0267-09 Table 1. Flame Signal. a Shutter operation of the C7961 may cause fluctuations in the voltage reading. Read the average stable voltage, disregarding the peaks. b Shutter operates at 3 Hz rate, the 7800 Series conducts an additional shutter test every 5 seconds.. 2. Start the burner and run t ...

65-0267-09 10 Removing Detector from Sight Pipe (Refer to Fig. 8) Loosen the three screws holding the mounting flange; rotate the detector slightly so the screws clear the slots in the back section of the flange; separate the flange; and pull off the back section (with the UV sensor). NOTE: The detector ...