Vacuubrand MD 1 VARIO-SP User Manual download pdf (Page 47)

page 47 of 68

+ 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 (MD 1 with AC motor), respectively

the control line (MD 1 VARIO-SP). Wait two minutes

after isolating the equipment from AC power or from

supply voltage 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.

+ 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.

+ 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.

Replacing diaphragms and valves

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Vacuubrand MD 1 VARIO-SP User Manual Page 47