UGSI Encore 700, Operation And Maintenance Manual

Page: 48 / 125

CF.440.400.001.IM.0417
ENCORE
®
700 METERING PUMP
32
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY OR
EQUIPMENT DAMAGE FROM BEING SPRAYED WITH LIQUID
UNDER PRESSURE, PRIOR TO DISASSEMBLY OF PIPE
CONNECTIONS, REFER TO DETAILED INSTRUCTIONS ON
RELIEVING PRESSURE AND DRAINING.
4.1 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 intervals) 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.
4.2 Periodic Cleaning
4.2.1 Cleaning Pumping Head Parts
If diffi culty 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 eff ects 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.
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 fi ve minutes as a
periodic preventive maintenance procedure.
WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY, USE
EXTREME CARE TO AVOID CONTACT WITH THE MATERIAL.
CONSULT YOUR CHEMICAL SUPPLIER FOR INSTRUCTIONS IN
THE PREPARATION OF SOLUTIONS AND THE HANDLING OF
CHEMICALS.
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