Start-Up; Shut-Down; Abnormal Operation - Johnson Pump TG GS2-25 Instruction Manual

3.19.5 Start-up

When the pump is to be put into service the following checklist and procedure must be observed:
c Pump is filled with liquid.
c Pump is sufficiently preheated.
c Quench media is present. Can it circulate freely?
c Suction and discharge valves are fully open.
c Start the pump for a short while and check the direction of rotation of the motor.
c Start the pump and check suction of liquid (suction pressure).
c RPM of the pump is checked.
c Discharge pipe and seal are checked for leaks.
c Proper operation of the pump is verified.

3.19.6 Shut-down

When the pump is to be put out of service the following procedure must be observed:
c Turn the motor off.
c Close all auxiliary service lines (heating/cooling circuit, circuit for flush/quench medium).
c If solidifying of the liquid must be avoided, clean the pump while the product is still fluid.
Also see section 3.21 Maintenance instructions
Note! When the liquid flows back from the discharge pipe to the pump, the pump may rotate in the
opposite direction. Closing the discharge line valve during the last rotation cycles can prevent this.

3.19.7 Abnormal operation

Note! In case of abnormal operation or when troubles occur the pump must be taken out of service
immediately. Inform all responsible personnel.
c Prior to restarting the pump, determine the reason for the problem and solve the problem.
A.0500.501 – IM-TGGS/05.01 EN (03/2013) 39