Grundfos NB Installation And Operating Instructions Manual page 19

4.2.2 Horizontal installation, NB, NBG
For inspection and repair, allow suitable
clearances for pump or motor removal.
• Pumps fitted with motors up to and including 4 kW
require a 0.3 m clearance behind the motor.
• Pumps fitted with motors of 5.5 kW and up require
a 0.3 m clearance behind the motor and at least a
1 m clearance above the motor to allow the use of
lifting equipment.
• NB pumps with base frame must have the same
clearance as pumps with motors from 5.5 to 200
kW.
Clearance behind the motor
Motor
0.25 - 4 kW
B
Clearance behind and above the motor
Minimum clearance
Motor
5.5 - 200 kW 0.3 m
A
Minimum clearance, A
0.3 m
A
A B
1 m
4.2.3 Minimum clearance of MTB
For inspection and repair, allow suitable
clearances for pump or motor removal.
Motor and pump head removal
Minimum clearance, X [mm]
P2
Pump
[kW]
Motor only
50 Hz
MTB 50-200 3.0 60
5.5
MTB 65-160 80
7.5
11
MTB 65-200 100
15
60 Hz
3.0
60
MTB 50-200 4.0
5.5 80
MTB 65-125 7.5 80
11
MTB 65-160 110
15
X
Motor and pump
head
140
100
100
140
100
100
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