VACUUBRAND MZ 2C NT +AK+M+D - Manual (Page 39)

page 39 of 74
Make sure ventilation is adequate to maintain recommend-
ed operating temperature. Keep a minimum distance of
2 in (5 cm) between the cooling fan and surrounding items
(e.g., housing, walls, etc.), or else install an external auto-
matic ventilation system.
Use connecting hoses with large diameter and keep them
as short as possible to avoid flow losses. Locate the pump
as closely as possible to the application.
Always install outlet tubing descending from the pump or
provide other measures to avoid backflow of condensate
towards the pump.
Use a suitable valve to isolate the pump from the vacuum
application. This is to allow the pump to warm up before
pumping condensable vapors and to clean the pump after
use before it is switched off.
NOTICE
Voltage selection switch:
1. Disconnect the electrical power cord.
2. Use a screw driver to adjust the voltage selection
switch at the terminal box of the pump to the supply
voltage:
”115/120” corresponds to 90-126 V and
”230/240” corresponds to 180-253 V.
voltage selection
switch
to be sure that the power source and the equipment
match in voltage, phase, and frequency.
• Pump with dual-voltage motor: Check that the volt-
age selection switch at the terminal box is positioned
correctly. Check every time before starting the pump.
Note: If the pump is switched on with wrong voltage
selection, the motor may be damaged!
Change the selection at the voltage selection
switch only, if the pump is unplugged from the
power source.