ENCORE
®
700 METERING PUMP
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY OR EQUIP-
MENTDAMAGEFROMBEINGSPRAYEDWITHLIQUIDUNDERPRESSURE,
PRIOR TO DISASSEMBLY OF PIPE CONNECTIONS, REFER TO DETAILED
INSTRUCTIONS ON RELIEVING PRESSURE AND DRAINING.
General
Routine maintenance of the metering pump consists of two operations:
•
Periodic cleaning: To remove contaminants and deposits formed on
parts in contact with the solution.
•
Periodic preventive maintenance: To disassemble, inspect, clean, and
replace recommended parts.
Corrective maintenance is performed (as required, at unscheduled in-
tervals) to correct a discrepant operating or non-operating condition. A
troubleshooting table (refer to Table 4.3) lists possible fault conditions
and corrective actions as a guide for service personnel.
Periodic Cleaning
Cleaning Pumping Head Parts
If difficulty is encountered in pumping the solution where hard water is
known to have been used in the preparation of the solution, remove the
pumping head parts for cleaning (refer to paragraph 4.3.4). The effects
of hard water are indicated by a white coating on all parts in contact
with the solution. This coating is most easily removed by soaking the
parts in 5% hydrochloric acid, commonly obtainable in drug stores. The
commercial grade of hydrochloric acid-known as muriatic acid-is also
suitable for this purpose. Where the above condition is known to exist,
pump the acid solution through the pump head for approximately five
minutes as a periodic preventive maintenance procedure.
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY, USE EX-
TREME CARE TO AVOID CONTACT WITH THE MATERIAL. CONSULT
YOUR CHEMICAL SUPPLIER FOR INSTRUCTIONS IN THE PREPARATION
OF SOLUTIONS AND THE HANDLING OF CHEMICALS.
WT.440.400.001.UA.IM.1012
32
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