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20 Installation CR/EN (1004) 4.0
3.4 Mounting
3.4.1 Installation of a pump unit
Pump and motor shafts of complete pump units are adjusted perfectly in line in the
works.
1 Horizontal alignment of the base plate is done with levelling screws. Use a spirit level
for correct horizontal alignment of the base plate.
2 Grout the base plate, see paragraph 3.4.5 "Grouting base plate".
3 Check the alignment of pump and motor shafts and if necessary realign, see
paragraph 3.4.3 "Alignment of the coupling".
3.4.2 Assembling a pump unit
If the pump and the electric motor still have to be assembled, do the following:
1 Fit both halves of the coupling to the pump shaft and the motor shaft respectively. The
front of the hub must be flush with the shaft end.
2 Place the pump on the base plate. Fix the pump to the base plate.
3 Place the electric motor on the base plate. Always place shims of 5 mm thickness
under the electric motor feet. Move the motor to obtain a gap of 140 mm between
both coupling halves.
4 Place copper shims under the feet of the electric motor. Fix the electric motor to the
base plate.
5 Align the coupling in accordance with the following instructions.
3.4.3 Alignment of the coupling
Alignment is achieved by adding or removing shims under the motor feet and also moving
the motor horizontally as required.
! Carry out alignment of the motor only as piping strain will occur if the pump is
shifted.
For couplings use a dial indicator as figure 3 shown. The alignment values are maximums
for continuous service, see paragraph 3.4.4 "Tolerances for aligning the coupling".
Figure 3: Aligning the coupling, A= Parallel, B= Angular.
A
B