TapFlo CTV 25-10 Instruction Manual - page 10
Instruction manual CTV vertical pumps
10
2. OPERATION
2.1
Start-up
- The motor shall be connected by qualified personnel only.
- Check manually that the motor is free to turn, moving the motor cooling fan.
- Make sure that the piping is not clogged and is free from residues or foreign objects.
- Bump start the motor to determine the direction of rotation (indicated with an arrow on the
motor). If change is necessary, follow instruction in chapter 1.7.
- The shutoff/regulation valve on the discharge side must be almost completely closed at start
-
up.
- Any auxiliary connections must all be connected.
2.1.1
Starting the pump
- When ever starting the pump, the pump casing must be filled with liquid, see MIN start level in
chapter 1.5.
- Start the electric motor and open the discharge adjustment/shutoff valve gradually until the
desired output has been reached. The pump must not turn more than two or three minutes with
discharge closed. A longer operation in these conditions can damage the pump.
- If the pressure shown on the pressure gauge on the discharge piping does not increase, turn
off the pump immediately and release pressure carefully. Repeat the connection procedure.
- If there are changes of flow-rate, head, density, temperature or viscosity of the liquid, stop the
pump and get in touch with our technical service.
- During operation, make sure the liquid level is within the limits, see levels H min and MIN in
chapter 1.5.
2.1.2
Re-starting after power shutoff
In case of accidental stopping, make sure that the non-return valve has prevented backflow and
check that the motor cooling fan has stopped. Start the pump again following the instructions of
chapter 2.1.1 ”Starting the pump”.
2.2
Stopping the Pump
It is advisable to close the discharge adjustment/shutoff valve gradually and stop the motor imme
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diately after. The reverse sequence is not recommendable, especially with larger pumps or longer
delivery piping. That is to avoid any problems due to water hammering.
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