VACUUBRAND MZ 2C NT +AK+M+D User Manual

Page 13

page 13 of 74

Due to the high compression ratio, the pump may gen-

erate overpressure at the outlet. Check pressure com-

patibility with system components (e.g., exhaust pipe-

line or exhaust valve) at the outlet.

Do not permit any

uncontrolled pressurizing.

Check the overpressure safety relief device at the ex-

haust waste vapor condenser at appropriate intervals.

Keep the electrical power cord away from heated sur-

faces.

• Provide a firm, level platform for the equipment. Check

that the system which you are going to evacuate is

mechanically stable. Check that all fittings are secure.

Ensure a stable position of the pump without any me-

chanical contact other than the pump feet.

• Comply with

maximum permissible pressures at in-

let and outlet and with

maximum permissible pres-

sure differences between inlet and outlet. See section

with overpressure at the inlet.

• Avoid overpressure of more than 17.5 psi absolute (1.2

bar absolute) in the event that gas or inert gas is con-

nected to the pump, to the gas ballast or to a venting

valve.

•

Note: Flexible elements will shrink when evacuated.

• Connect hoses gas tight at inlet and outlet of the pump.

• Ensure that no foreign objects can be drawn into the

pump.

• Check the power source and the pump’s rating plate

to be sure that the power source and the equipment

match in voltage, phase, and frequency.

• On pumps with a dual-voltage motor, check that the

voltage selection switch is set correctly. Do not change

the setting of the voltage selection switch while the

pump is connected to AC power. Unplug the pump be-

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