Boekel Scientific 177001 Aspirator Pump - Manual (Page 5)

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3.2 Installation
Place the reservoir on a stable surface. Assure that the Drain Tube is
secured in the clip to keep the Drain Tube upright. Attach the
Overflow Hose to the overflow port on the reservoir. Fill the reservoir
with water. The water level should be at the bottom of the overflow
port. Place the pump/motor on the reservoir and use the Lid to
cover the remaining opening on the reservoir.
4. Operation
4.1 Identification of Controls (See Figure 1)
The Power Switch controls power to the unit. Push toggle up to turn
unit on and down to turn unit off.
The Drain Tube allows the water to be drained from the reservoir.
The Overflow Port is used to maintain the proper water level in the
reservoir and is used as the water supply hose when a continuous
flow of water is required.
4.2 Connecting to the Suction Ports
Connect one end of the vacuum hose to either suction port and
the other end to your apparatus. The Y fitting can be used to
connect both vacuum ports to a single port on your apparatus.
4.3 Operating the Unit
Position the power switch to the on position. The unit should begin
producing a vacuum at each suction port. When the operation is
finished, release the vacuum hose from the suction port and turn off
the power switch to prevent reversing flow. If the optional Vacuum
Regulator Gauge is used, this gauge should be turned off
completely. If the unit is being used without a continuous flow of
water, cool the internally circulating water by inserting ice or an
immersion cooler through the opening at the top of the reservoir.
Cooling the water will prevent the loss of suction force caused by a
rise in the water temperature. When strong acids or organic
solvents are used, a continuous flow of water must be used. A
water supply of approximately 1 liter per minute should maintain the
proper water level in the reservoir. Clean and empty the water in
the tank regularly, since solvents build up on the sides of the tank
and will interfere with the vacuum. The more corrosive the material
being aspirated, the more frequent the need for changing the
water.