Grundfos BMS hs Assembly, Installation And Operating Instructions page 15

7 Built-in non-return valve
8
6
14
3
12 15
5
16 17
4
2
1
26
Fig. 26 Example of BMSX booster system
Pos. Description
1 Raw-water feed pump
2 Filter
3 Low-pressure switch
4 Flowmeter
5 Pressure gauge (raw water)
6 BMS hs pump with built-in non-return valve
7 Non-return valve
8 Pressure gauge (BMS hs outlet pressure)
9 Vent
10 High-pressure switch
11 Pressure-relief valve
12 Pressure gauge (BMS hp inlet pressure)
13 Pressure gauge (BMS hp outlet pressure)
14 BMS hp pump
15 Flowmeter (high-pressure raw water)
16 Pressure gauge (low-pressure raw water)
17 Flowmeter (low-pressure raw water)
18 Membrane filter
19 Permeate
20 Cleaning flush valve
21 Pressure gauge (high-pressure concentrate)
22 Pressure gauge (low-pressure concentrate)
23 Pressure exchanger of BMSX
24 Concentrate valve
25 Pressure gauge (fresh-water pump)
26 Fresh-water flush pump
27 Flowmeter
27
18
19
13
20
21
22
23
24
25
4.5.3 Startup
To start up a BMSX system, proceed as follows:
1. All valves must be in their normal operating positions.
2. Start the raw-water feed pump (1). When the raw-water feed
pump is started, the system is filled with water. Make sure that
the entire system is vented. The feed flow (17) through the
pressure exchanger (23) may or may not cause the rotor to
begin to rotate. Rotation will be confirmed by a humming
noise.
3. Adjust the flow rate and pressure within the maximum and
minimum values stated on the PX nameplate.
Never operate the main high-pressure pump without
the BMS hp pump. An interlock should be installed,
so the high-pressure pump will automatically shut
down if the booster pump shuts down.
7
Built-in non-return valve
8
6
14
12 15
3
16 17
5
4
2
1
26
Fig. 27 Starting the seawater feed pump
4. Adjust the concentrate valve (24) to the system flow.
5. Vent the system.
6. When you have filled the system with water and vented it, see
the BMS hp startup procedure.
The maximum flow rate of the pressure exchanger
must never be exceeded. See the nameplate of the
pressure exchanger.
WARNING
Pressurised system
Death or serious personal injury
- The BMS hp pump must not run against a closed
outlet valve for more than 5 seconds.
- Ensure a minimum liquid flow through the pump by
connecting a bypass or drain to the outlet side of
the pump. The drain can be connected to a tank.
7. Starting the BMS hp pump (14). See section
27
18
19
13
21
20
22
23
24
25
4.3.2 Startup.
15