Bms Hp Pump; Bmst System - Grundfos BMS hs Assembly, Installation And Operating Instructions

9.2 BMS hp pump

This procedure describes how to shut down the BMS hp pump.
6
4
5
3
2
1
Fig. 5 Example of BMS hp system
Procedure
1. Ramp down the BMS hp pump (6) according to the factory
settings. See fig. 6 (3 and 4).
rpm
2
1700
1
4
3 seconds
Fig. 6 Ramp down
Ramp down from 1700 to 0 rpm in three seconds.
2. Stop the feed pump (1).
3. Start the fresh-water flush pump (12), and flush the system
with fresh water (11) (minimum 2 bar for flushing).
4. Flush the system until the salinity is lower than 1000 ppm
TDS.
5. Stop the fresh-water pump (15).
6. Close all valves to keep the fresh water in the system during
the shutdown.
To flush the thrust bearing of the BMS hp pump, start
the pump for 30 seconds to allow the fresh water to
enter into the thrust bearing.
If the flushing takes more than 10 minutes, reduce
the flow to maximum 10 % of the rated flow rate.
During periods of inactivity, fill the pump with clean
fresh water.
20
8
7
9
11
12
3
t [seconds]

9.3 BMST system

This procedure describes how to shut down the BMST system.
9 10
8
7
4
6
5 6.1
3
2
1
16
Fig. 7 Example of BMST system
Procedure
1. Ramp down the BMS hs pump (6.1) according to the factory
settings.
2. Stop the seawater feed pump (1).
3. Start the fresh-water flush pump (16), and flush the system
with fresh water (15) (minimum 2 bar for flushing).
4. Flush the system for 5 to 10 minutes or until the salinity is
lower than 1000 ppm TDS.
5. Stop the fresh-water pump (16).
6. Close all valves to keep the fresh water in the system during
shutdown.
To flush the thrust bearing of the BMS hs pump, start
the pump for 30 seconds to allow the fresh water to
enter into the thrust bearing.
If the flushing takes more than 10 minutes, reduce
the flow to maximum 10 % of the rated flow rate.
During periods of inactivity, fill the pump with clean
fresh water.
13
12
14
15