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Connecting up unit
Make sure that no tension or vibrations are carried over to the pump or filter
housing when the pipes are connected. Use hoses or expansion joints if
necessary.
Connecting the inlet port (IN)
NOTICE
Contamination too high
The unit will be damaged
►
Do not prime directly at the bottom of the tank
►
Do not prime in the sump
►
Never prime without a built-in suction screen
The greatest contamination is found on the bottom of the tank.
All impurities and other particles are deposited on the bottom of
the tank. All impurities and other particles are deposited on the
bottom of the tank.
The suction pressure at the VMU inlet must be in the range of -0.4 ... 1 bar.
Use a negative pressure-resistant, flexible hose or a pipe for the suction-side
connection.
Make sure that the cross-section of the connected hoses/piping is at least as
large as the cross-section of the inlet/outlet port sizes.
The shape of the tank connection should be set up in such a way that it will
always be lower than the level of the oil in the tank.
Install a shut-off valve on the suction side of the tank.
VMU 1 ATEX II 2G IIC T4
en(us)
Page 32 / 68
BeWa VMU_1_ATEX-II2GIICT4_10000649233 en-us 2017-03-07.doc
2017-03-07