Johnson Pump MCHC, Instruction Manual

Page: 22 / 86

MCHZ/EN (0912) 4.2
Commissioning 21
MCHZ
4 Commissioning
4.1 Inspection of the pump
• Construction with stuffing box packing: check whether the gland nuts have not been
over tightened. If necessary, loosen these nuts and tighten them again by hand.
• Check whether the pump shaft turns freely. Do this by turning the shaft end at the
coupling a few times by hand.
4.2 Inspection of the motor
Pump driven by an electric motor:
• Check whether the fuses have been mounted.
4.3 Preparing the pump unit for commissioning
Proceed as follows, both when the unit is put into operation for the first time and after the
pump has been overhauled:
1 Fully open the stop valve in the suction pipe. Close the delivery stop valve.
2 Fill the pump and the suction pipe with the liquid to be pumped.
3 Turn the pump shaft a few times by hand and add more liquid, if necessary.
4.4 Checking the sense of rotation
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Beware of possible non-screened rotating parts, when checking the sense of
rotation!
1 The sense of rotation of the pump is indicated by an arrow. Check whether the sense
of rotation of the motor corresponds with that of the pump.
2 Let the motor run for only a short time and check the sense of rotation.
3 If the sense of rotation is not correct, alter the sense of rotation. See the instructions
in the user manual belonging to the electric motor.
4 Fit the guard.