All piping, valving, etc, cleaned with P-D-680 drycleaning solvent must be thoroughly rinsed with water to
remove any solvent residue from these parts. Flush all the piping valving, etc by operating the unit and
allowing the effluent filtered water to go to waste for approximately 10 minutes whenever unit is returned
from maintenance. This will remove residual solvent in the system that may result in the production of a
non-palatable or non-potable water.
SECTION II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
To ensure that the water purification unit is ready for operation at all times, it must be inspected systematically, so that
defects may be discovered and corrected before they result in serious damage or failure. The necessary preventive
maintenance services to be performed are listed and described in paragraph 3-4. The item numbers indicate sequence
of minimum inspection requirements. Defects discovered luring operation of the unit will be noted for future correction,
to be made as soon as operation has ceased. Stop operation immediately IL a deficiency is noted during operation which
would damage the 'equipment if operation were continued. All deficiencies and shortnings will be recorded, together with
corrective action taken, on I,A Form 2404 (Equipment Inspection and Maintenance Worksheet) at the earliest possible
Before Operating. Always keep in mind CAUTIONS and WARNINGS. Perform (B) PMCS before operation.
While Operating. Always keep in mind CAUTIONS and WARNINGS. Perform (D) PMCS during operation.
After Operating. Be sure to perform (A) PMCS after operation.
If Equipment Fails to Operate. Troubleshoot with proper equipment. Report any deficiencies using the proper
forms. (See paragraph 1-2).
PREVENTIVE MAINTENAN CE CHECKS AND SERVICES.
Table 3-1 lists the checks and services to be performed by the operator. They are performed within the
interval shown and in numerical sequence within each interval as indicated by item number. Figure 3-2
shows a routing diagram of certain items to be checked.