Precision Control Systems ChamberIR 4069 - Manual (Page 18)

6-1
Section 6 – MAINTENANCE
The repair and maintenance of the Model 4069 includes replacement of the T3-style
lamps, cleaning/replacement of the split quartz liner, and cleaning of the reflectors.
6.1 LAMP
REMOVAL/REPLACEMENT/INSTALLATION: The T3-style lamps
are installed into the Model 4069 when shipped from the factory. The following
procedure details the process to replace the lamps in the Model 4069 (reference Figure 6-
1, 6-2, & 6-3):
Note:
• Remove all power from the heater BEFORE attempting to install/replace the
lamps.
• Allow a minimum of ½-inch (12 mm) of slack in the lamp leads so that the leads
are not taut when inserted into the lamp terminal blocks.
• Always take care to handle all lamps by the ceramic end seals and use clean
cotton or latex gloves to prevent contamination of the quartz lamp envelopes.
1. Remove quartz liner (see Section 6.2). Take this opportunity to clean the liner.
2. Remove end-cover screws (4 per end cover).
3. Remove end covers on both ends of the heater.
4. Remove end-reflector screws (2 per reflector)
5. Remove end reflectors on both ends.
6. Remove the lamp wires from the ceramic terminal blocks.
7. Carefully disengage lamp from clips (both ends).
8. Slide the end of the lamp through the rectangular cutout in the end casting on one
end of the heater through the rectangular cutout in the end casting of the other end
of the heater.
Installing new lamp
9. Position the lamp over the lamp clips so that the lighted portion of the lamp is
equally space in the reflector.
Note: Be sure that the Gas Fill Tip is facing away from the reflector
10. While holding the lamp on both ends by the ceramic end seals, with light pressure
push the lamp into the lamp clips. A slight twisting motion of the lamp, while
pushing the lamp into the clip, helps the lamp to seat properly.