1
5
2
3
4
Fig. 9:
Cooling water connection
1 Cooling water inlet
4
Return line
2 Dirt trap
5
Cooling water outlet
3 Feed line
Procedure
Pfeiffer Vacuum recommends the use of a dirt trap in the supply line.
1. Connect the cooling water supply line to the hose nozzle of the quick fitting coupling at the desig-
nated cooling water inlet.
2. Connect the cooling water return line to the hose nozzle of the quick fitting coupling at the desig-
nated cooling water outlet.
3. Secure the hose lines on the roots pump with hose clamps.
5.7 Connecting switch box
CAUTION
Electric shock and damage to the vacuum pump and electronic drive unit due to improper
connection and disconnection of components
With existing power supply connection to the switch box, there is a risk of electric shock when making
contact with the motor connecting plug. Even after the power supply has been switched off, the vac-
uum pump continues to deliver electrical energy during its run-down period. If the units are discon-
nected prematurely, there is the risk of electric shock, and destruction of electric components.
► Always interrupt the power supply connection at the switch box before connecting the power sup-
ply plug to the motor.
► With existing power supply connection to the switch box or when the pistons are running, never
disconnect the motor connecting plug.
► After switching off, wait at least another 5 minutes until the capacitors have discharged before
separating the cable connection.
Installation
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