VACUUBRAND MZ 1C - Manual (Page 46)

page 46 of 102
Replacing diaphragms and valves
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Please read section ”Replacing diaphragms and valves” com-
pletely before starting maintenance.
The pictures may show other versions of pumps. This does not change
the method of replacing diaphragms and valves.
➨
Never operate the pump if covers or other parts of
the pump are disassembled.
➨
Before starting maintenance, disconnect the electri-
cal power cord. Wait five seconds after isolating the
equipment from AC power to allow the capacitors to
discharge.
➨
Ensure that the pump cannot be operated accidentally.
➨
Note: The pump might be contaminated with the pro-
cess chemicals that have been pumped during opera-
tion. Ensure that the pump is decontaminated before
maintenance.
➨
Avoid the release of pollutants.
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Never operate a defective or damaged pump.
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Check every motor capacitor regularly by measuring
its capacity and estimating its service life. Replace old
capacitors early enough to prevent a failure. The ca-
pacitors must be replaced by a trained electrician.
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Take adequate precautions to protect people
from the effects of dangerous substances
that may have contaminated the pump and
may be released upon disassembly. Ensure
that the maintenance technician is famil-
iar with the safety procedures which relate
to the products processed by the pumping
system.
Use appropriate protective clothing, safety
goggles and protective gloves.