Grundfos BMS Series - Low-Pressure Flow Control; Motor Bearings; 8 Servicing the Product

1
2
4
15
14
13
11
8
7
9
17
18
19
12
20
21
23
22
16
5
6
24
25
26
10
A
3
TM059618
System in operation
See the description of the position numbers in the section on before
startup.
The BMSX system pressure will increase. The sound pressure level
from the pressure exchanger (22) will increase. Small variations in
the sound pressure level and rotor speed are normal.
Related information
7.2.2 Startup
7.3.2 Startup
7.4.2 Before startup
7.5 Low-pressure flow control
The concentrate valve (23) on the outlet side of the system must be
adjusted to control the flow rate of the low-pressure seawater inlet
(16) and low-pressure concentrate outlet (21) with a minimum back
pressure of 1 bar. This valve (23) also adds back pressure on the
pressure exchanger (22) required to prevent destructive cavitation.
The low-pressure seawater inlet flow rate (16) equals the high-
pressure concentrate inlet flow rate (14).
8. Servicing the product
DANGER
Magnetic field
Death or serious personal injury
‐ Dismantling of the PM motors used for the BMS HS-E-
C-P-A pumps must not be carried out by people with
pacemakers or any other implanted medical devices.
The rotor contains a very powerful magnetic field,
which can affect pacemakers or disturb digital devices.
Check the following at suitable intervals, preferably daily:
• flow rate and pressure
• noise level.
We recommend that you write the operating data in a log book as
they may be useful in connection with maintenance to see any
variation in the pump performance and be able to react to this.
Temperature variations can cause condensation inside the
motor. We recommend that you remove the motor drain
plug to let condensation water escape.
During prolonged storage or downtime, the interval
between two greasing operations must never exceed 6
months.
8.1 Motor bearings
The pumps are factory-fitted with a manual motor-bearing greasing
system. See the motor nameplate or the installation and operating
instructions supplied with the motor for information such as
greasing intervals.
8.1.1
Type of grease
See the motor nameplate.
Avoid mixing greases.
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English (GB)