EN1C-0015SZ20 R0602
14
CAUTION
Open the master switch to disconnect power
before removing or installing the detector or its
cover. More than one disconnect can be involved.
Periodic Maintenance
A Clean the viewing window (or focusing lens) when
necessary. Remove the detector (see Troubleshooting
section) and use a clean cloth over the eraser end of a
pencil. Do not remove the window (or lens) to clean it. If it
is broken or damaged or it is coated with a substance
that cannot be cleaned off, replace it (see Fig. 14).
B Keep the flame detection system adjusted for the
smoothest, most reliable operation as recommended by
the burner manufacturer.
C Replace the sensing tube, coil and shutter assembly, or
viewing window only when necessary to obtain proper
operation.
Removing the Detector Cover
Open the Master Switch
C7061A: Unscrew the four captive cover screws (Fig. 8 and
9) and carefully slide off the cover.
NOTE: These bolts are removable. Put them in a
safe place to avoid losing them.
C7061F Carefully unscrew the cover from the detector cap.
Replacing the Ultraviolet Sensing Tube
A Open the master switch and remove the cover from the
detector (see instructions above).
B Locate the UV sensing tube.
IMPORTANT
Be very careful not to kink or otherwise damage
the flexible shutter.
C Gently bend the alignment guid just enough to free the tip
of the tube.
D Insert a screwdriver between the tube base and socket,
and gently pry the tube out of its socket.
E Pull the tube out of its socket.
F Insert the new tube through the openings in the shutter
assembly.
G Align the three pins on the new tube with the holes in the
socket.
H Carefully push the new tube firmly into the socket; the
alignment guide will snap into place around the tip of the
tube.
I
Make sure the new UV sensor tube is seated securely.
J Replace the detector cover.
Replacing the Coil and Shutter Assembly
NOTE: Use only a 190971 B coil and shutter assembly.
A Open the master switch and remove the detector cover
(see Removing the Detector Cover section).
B Remove the ultraviolet sensing tube (steps A through E of
Replacing the Ultraviolet Sensing Tube section).
C Cut the white wires as close as possible to the crimped
connectors, and remove the crimped connectors.
D Remove the three mounting screws from the base of the
coil and shutter assembly. Put the screws in a safe place.
E Remove the coil and shutter assembly.
F Put the new coil and shutter assembly into place.
IMPORTANT
Be very careful not to kink or otherwise damage
the flexible shutter.
G Insert the three mounting screws into the base of the coil
and shutter assembly and tighten securely.
H Remove sufficient insulation from each of the two white
lead wires remaining on the detector, and also from each
of the two white leadwires on the new coil.
I
Using solderless connectors, connect one of the coil wires
to one of the remaining white leadwires. Connect the other
coil wire to the other remaining white leadwire.
J Reinstall the sensing tube (steps F through I of Replacing
the Ultraviolet Sensing Tube section).
K Replace the detector cover.
SERVICE
Fig. 12. Replacing ultraviolet radiation sensing tube.
Содержание C7061A
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