Startup; Drinking Water Systems; Hydro Multi-E In System With Positive Inlet Pressure - Grundfos Hydro Multi-E Series Installation And Operating Instructions Manual

9. Startup

DANGER
Electric shock
Death or serious personal injury
- Make sure that the wires to be connected to the
connection groups below are separated from each
other by reinforced insulation in their entire
lengths.
DANGER
Contaminated drinking water
Death or serious personal injury
- Flush the system before starting it or after a
standstill period.
WARNING
Electric shock
Death or serious personal injury
- Switch off the power supply and wait at least five
minutes before you make any connections in the
breaker cabinet.
- Tighten the screws.
WARNING
High noise level
Death or serious personal injury
- Use ear protection.

9.1 Drinking water systems

Hygiene
Grundfos pressure pump systems are functionally tested by
running water through the system. During the test, Grundfos
continuously surveys the quality of the test water. Since it is not
possible to completely drain and dry the system after the test, the
system must be rinsed or flushed thoroughly before being used
for drinking water applications, due to risk of bacteria growth.
This also applies if the system has been shut down for a long
period of time. Rinsing and flushing must always be done in
accordance with local regulations.
Contaminated drinking water endangers health.
12
9.2 Hydro Multi-E in system with positive inlet
pressure
Make sure that the power is switched off on the main
switch and the circuit breakers.
Do not start the pumps until they have been filled
with liquid.
When you have carried out the mechanical and electrical
installation described in section
follows:
1. Confirm that Hydro Multi-E corresponds to the order and that
no part has been damaged.
2. Confirm that the precharge pressure in the diaphragm tank is
70 % of the required outlet pressure (setpoint).
Measure the precharge pressure when the water
side of tank does not have system pressure on it.
3. Connect water and power supplies to the system.
4. Open all pump inlet and outlet valves.
Vent all pumps by means of the vent screws.
Vent screws
Fig. 20 Position of vent screws in CRE pump systems
5. Switch on the power supply with the main switch.
6. Start pump 1 by pressing the start/stop button on the pump
control panel.
7. Vent pump 1 using the vent screw.
8. Repeat steps 9 and 10 for the other pumps in the system.
9. Set the desired outlet pressure.
If you change the outlet pressure, change the
diaphragm tank precharge pressure accordingly.
10. Confirm that the pumps are cutting in and out, thus adjusting
the performance to the demand.
Hydro Multi-E is now in automatic mode and ready for operation.
The standard settings can be changed using Grundfos Go
Remote, see 11. Multimaster function
6. Installation, proceed as
or HMI300.