10
Instruction manual CTM mag drive pumps
IOM manual Tapflo PE & PTFE series pumps
11
2. OPERATION
2.1
Start-up
- 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. Make sure that
the liquid flows regularly into the pump.
- The pump and piping connected to it, at least the suction pipe, must be full of liquid. Any air or gas
must be carefully released. In case of suction with negative head, fill the suction piping and check how
the bottom valve works. It must guarantee that the liquid must not flow back, emptying therefore
the suction pipe with consequent disconnection of the pump.
- The suction shutoff valve (if any) must be completely open.
- The shutoff/regulation valve on the discharge side must be almost completely closed.
- The motor must turn in the same direction as the arrow shown on the pump. The direction of rotation
is always clockwise looking at the pump from the motor side; check by starting briefly, then looking at
the direction of rotation of the motor fan through the fan lid. If it is wrong, the motor must be stopped
immediately. Change the connection to the terminals of the electric motor (chapter 1.7) and repeat
the procedure described above.
- Any auxiliary connections must all be connected.
2.1.1
Starting the pump
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 seriously.
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.
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”.
If the pump intakes from a lower level, it can unprime during the standstill and therefore you must check
again before starting that the pump and the suction piping are full of liquid.
2.2
Stopping the Pump
It is advisable to close the discharge adjustment/shutoff valve gradually and stop the motor immediately
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. If a suction shutoff valve has been installed, it
is advisable to close it completely.
!
STOP
!
!
!
!
3. MAINTENANCE
Maintenance work on electrical installations must be performed by qualified personnel
and only when the power supply has been shutoff. Follow the local and national safety
regulations.
3.1
Maintenance schedule
The CTM range pumps have been designed and tested to run for 5000 hours in ideal working conditions.
Please note that is a conservative figure since the actual duty point of your pump can substantially modify
such value. Additional factors such as intermittent operation, type of pumped liquid and installation in
the plant may affect the life of components subject to wear.
In any case, Tapflo advises to service pumps every year of service, even when used in ideal operating
conditions.
3.2
Trouble shooting
The following tables help to identify the causes of any problems during operation or failures of the pump.
By consulting table ”A” identify on the left column (symptoms) the problem encountered on the right
column (causes) the number relevant to the possible causes of malfunctioning. Table ”B”, by excluding
the causes not applicable to the case being examined, allows to identify the causes of the problem.