Bms Hs Pump - Grundfos BMS hs Assembly, Installation And Operating Instructions

4.2 BMS hs pump

4.2.1 Before startup
Follow these instructions to ensure correct startup of the BMS hs
pump.
WARNING
Description of hazard
Death or serious personal injury
- Make sure that the pump and the system are fully
vented before startup.
For type, amount and interval of greasing, see the
nameplate on the motor.
Check that the power supply is according to the nameplate.
4
6
5
3
2
1
Fig. 21 Example of BMS hs pump
Pos. Description
1 Raw-water feed pump
2 Pressure gauge (raw water)
3 Filter
4 Low-pressure switch
5 Flowmeter
6 BMS hs pump with built-in non-return valve
7 High-pressure switch
8 Pressure gauge (BMS hs outlet pressure)
9 Vent
10 Pressure-relief valve
11 Pressure gauge (fresh-water pump)
12 Fresh-water flush pump*
* A fresh-water flush pump must be installed in systems for
seawater desalination or similar systems.
12
Built-in non-return valve
8
7
9
11
12
4.2.2 Startup
If an outlet valve is installed, we recommend that you open the
valve 1/4 of a turn when starting the pump or system.
Do not operate pumps against a closed valve.
To start up a BMS hs pump, proceed as follows:
1. Start the feed pump (1), and check that the inlet pressure (2)
of the BMS hs pump (6) is higher than 1.0 bar and lower than
35.0 bar.
2. Vent the BMS hs pump (6).
3. Start the BMS hs pump (6). Ramp up the BMS hs pump (6)
according to factory settings. See fig.
Ramp up from 0 to 1700 rpm within three seconds.
rpm
2
1700
1
4
3 seconds
Fig. 22 Ramping up
Default ramp-up time:
• 0 to 1700 rpm in maximum three seconds (1). This setting
must not be changed.
• Ramp up from 1700 rpm is set to 1500 rpm/min (1000 rpm/40
seconds) (2). It can be changed according to application
requirement.
4. Set the outlet pressure of the pump (8) to the desired value.
See fig. 21.
5. Check that the inlet pressure (2) of the pump is higher than
1.0 bar and lower than 35.0 bar.
Make sure that the BMS hs pump is dry-run
protected.
Do not touch electrical connections if the pump has
reverse flow.
22 (1 and 2).
3
t [seconds]