MONTHLY MAINTENANCE (continued)
Filter Screening Servicing (continued)
Flush filter screens with clean water, using fine-spray hose or immersion. (Soap and water may be
Dry filter screens. Heat or compressed air may be used to facilitate drying.
Install screens and louvered front panels on cabinet.
SPECIAL MAINTENANCE PROBLEMS
PAINTING. When painting the detector housing or vicinity, cover or other-wise protect the flame
arrestor cover of the sensor element from paint overspray.
DETECTOR IMMERSION. If the detector is accidently immersed in clean water, operate in gas-free
air for 5 or 6 hours until detector is completely dry; then calibrate and adjust in accordance with
procedures in Section 3, CALIBRATION AND ADJUSTMENTS. Discard and replace sensor element if
response is marginal or inadequate. If detector is immersed in water contaminated with dirt, solvent, or
other combustible materials, discard and replace sensor element. Do not attempt to restore or use the
Highest quality components assure that CD800/830 andCD802/832 systems will be as troublefree as
the state of the art permits. If difficulties beyond routine maintenance and adjustment occur,
troubleshoot in accordance with the following paragraphs.
GENERAL PREPARATIONS FOR TROUBLESHOOTING:
Check for loose or broken wires.
Turn power off and observe position of indicating meter pointer. Turn mechanical screw
adjustment under meter to adjust pointer to zero reading if necessary.
Make certain that detector is in pure, gas-free air (using J-W combustible gas indicator and J-
W gas calibration kit with 100% nitrogen or zero-gas, dry-air cylinder if necessary, in
accordance with paragraph 3-2.1, step 3, instruction).