vacuubrand MD 4C NT + 2 AK, Instructions For Use Manual

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page 52 of 75
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 . 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.
Never operate a defective or damaged pump .
Take adequate precautions to protect people from the
effects of dangerous substances that may have con-
taminated the pump and may be released upon dis-
assembly. Ensure that the maintenance technician is
familiar with the safety procedures which relate to the
products processed by the pumping system.
Use appropriate protective clothing, safety goggles
and protective gloves.
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.
maintenance. Drain condensate, if applicable.
Vent the pump and isolate it from the vacuum sys-
tem before you start maintenance.
Replacing diaphragms and valves