9
BÜCHI Vacuum Controller B-720 4 Putting into operation
4.4 Installation with a combination water jet pump
B-767
The water jet pump B-767 has a built-in cooling water valve.
• Attach the water jet pump B-767
onto the water fau-
cet
.
• Insert the valve plug in the socket V.
• Connect the cooling water hoses.
• Connect the B-720 to the power supply.
• Switch on the B-720.
• Turn the water faucet
on and use the needle valve
to
adjust the flow through the condenser.
Water faucet
Woulff bottle trap
Needle valve
B-767 Water jet pump
Figure 10: The B-720 with a B-767 Water jet pump
• Connect the B-745
to a socket-outlet.
• Plug the vacuum pump
into the B-745 with the power
cable.
• Place the non-return valve
in the vacuum line leading to
the woulff bottle trap
.
• Plug the connecting cable
from the B-745 into the socket
V of the controller.
• Attach the cooling water valve
onto the water faucet
.
• Insert the valve plug in the socket CW.
• Connect the cooling water hoses.
• Connect the B-720 to the power supply.
• Switch on the B-720.
• Turn the water faucet on
and use the needle valve
to
adjust the flow through the condenser.
Water faucet
Woulff bottle trap
Needle valve
Cooling water valve
Vacuum pump
Büchi Switch-box B-745
Non-return valve
Connecting cable
4.4 Installation with a vacuum pump, a B-745
Switch-box and a cooling water valve
Figure 11: The B-720 with a vacuum pump, a B-745 Switch-box and a
cooling water valve
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