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ADD FURNACE CO.,LTD.
44 ซอยบรมราชชนนี 70 ถนนบรมราชชนนี แขวงศาลาธรรมสพน์ เขตทวีวัฒนา กรุงเทพฯ 10170
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Fig. 13. Replacing coil and shutter assembly.
Replacing the Quartz Viewing Window (or
Focusing Lens) C7061A Only
IMPORTANT
A quartz window or lens must be used. Ordinary
Fig. 14. Replacing quartz viewing window or focusing lens
I Clean the viewing window (or focusing lens) on both
sides using a clean cloth placed over the eraser end of a
pencil.
glass absorbs or filters out ultraviolet radiation.
J
Reinstall the sensing tube (steps F through I of
Replacing the Ultraviolet Sensing Tube section).
A
Open the master switch; remove the detector from the
sight pipe and remove the detector cover. (see
appropriate sections.)
B
Remove the ultraviolet sensing tube (steps A through E
of Replacing the Ultraviolet Sensing Tube section).
K Replace the detector cover and reinstall the detector on
the sight pipe.
Replacing Focusing Lens C7061F Only
C Loosen the three screws holding the back section of the
mounting flange to the faceplate. Carefully remove and
keep together the three screws, the gray fiber-
neoprene gasket, the red rubber washer, and the back
section of the mounting flange.
NOTE: if the viewing window (with its rubber mounting
gaskets) is stuck to the mounting flange skip step D.
IMPORTANT
A quartz window or lens must be used. Ordinary
glass absorbs or filters out ultraviolet radiation.
A
Remove the detector from the sight pipe (see Fig. 15).
B
Remove the 3 screws from the threaded flange (pipe
connection) which houses the 124204 Focusing Lens.
IMPORTANT
Be very careful not to kink or otherwise damage
the flexible shutter.
D Using the eraser end of a pencil, push out the viewing
window (with its rubber mounting gaskets) from the inside
of the faceplate.
C Replace the lens and tighten the 3 screws.
E
Insert one rubber mounting gasket into the window
aperture in the faceplate.
F
Insert the new quartz viewing window (or focusing lens).
G Insert two rubber mounting gaskets (only one gasket
when replacing a focusing lens) into the aperture.
H Put the back section of the mounting flange, rubber
washer, and fiber-neoprene gasket in place on the
faceplate, and securely tighten the three mounting
screws.
Fig. 15. Replacing focusing lens on C7061F1003
NOTE: Make sure the red rubber washer between the gray
fiber-neoprene gasket and the back section of the
mounting flange does not protrude over the window
aperture or otherwise obscure the detector line-of-
sight.
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