3.2 Getting started
3.2.1
Preparing for work
If a check valve is installed, make sure that it opens during start-up, otherwise, turn off the pump.
Please note: The pump must not be operated without a working fluid. Before starting the
pump, fill it with air via the air inlet or air outlet (see figure 2 in the appendix).
Check the outlet line and water supply line to make sure they are connected correctly. Check the
direction of rotation of the motor and impeller.
The gas inlet and outlet, as well as the direction of rotation of the motor, are indicated by arrows on
the housing.
3.2.2
Turning on
Turn on the pump and check the fluid flow (see section 1.3.5). If necessary, you can use
the control valve (spare part no. 16 in figure 2 in the appendix) to adjust the fluid flow. The flow
meter (15) is used to fine-tune the fluid flow.
3.3 Precautionary measures
3.3.1
Turning on and off
If it is necessary to control the pump automatically, the flow of working fluid should be
controlled by a solenoid valve, which in turn opens and closes synchronously with the engine
switching on and off. (See Figure 2 in the appendix)
When the 2BV is in operation, the valve is open. When
2BV is off - the valve is closed.
If the pump is not equipped with automatic valve control, open the valve (18 in Figure 2)
immediately after the pump has started and close it immediately after it has been switched off.
After the pump is switched off, the control valve (16) closes.
3.3.2
Draining the working fluid
Caution: If the process fluid is hazardous to persons or equipment, flush the pump before
opening it for safety reasons. To do this, pump sufficient clean water through the pump.
Unscrew the screw under the pump cover and allow the working fluid to drain out. Manually
rotate the impeller until all the fluid is drained.
Usually, it is enough to turn the impeller 45° and all the liquid will drain out. The pump can
be stored without fluid for a long time, even in sub-zero temperatures.
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