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Pelco Manual C397M (4/98) 13
6.0 MAINTENANCE
Perform the following maintenance at six-month (or more often in harsh environ-
ments) intervals to prolong the operational life and appearance of the equipment.
Window and Filters
1. Clean the window with a mild nonabrasive detergent in water and a soft cloth
to maintain picture clarity.
2. If your enclosure has a blower, clean the foam filters as follows:
a. On the bottom front of the enclosure, remove the two screws in the vent grill.
b. Remove the vent grill and take out the filters.
c. Clean the filters with warm water and mild detergent, dry thoroughly, and
replace them in the grill.
d. Reinstall the vent grill.
To order replacement filters, use the part number EH550010045.
Pan Adjustments and Lubrication
3. Tilt the enclosure so that the front points downward.
4. Remove the four screws at the rear, just above the base, of the pan/tilt unit.
5. Lift up the lid slightly and push it forward to free the lip at the front of the lid.
6. Check the tension of the pan drive chain. A movement of 1/32" to 3/32" in the
chain is acceptable. To adjust the chain:
a. Refer to Figure 4. Loosen the four screws (A - two shown) that secure the
motor/gearbox to the mounting frame.
b. Use a screwdriver to pry at B to apply tension to the chain.
c. Tighten the screws.
7. If necessary, tighten the nut at C to remove any endplay in the worm (E).
8. Lubricate the pan gears and chain assembly with a high quality grease ca-
pable of withstanding temperatures from -50° to 170° F (-46° to 77° C):
a. Liberally apply grease to the chain and sprockets (D), worm (E), and
worm gear (behind worm).
b. Pan the unit to spread the grease uniformly on the parts.
c. Apply additional grease if necessary.
9. Replace the lid over the pan housing.