Hydro Multi-E In System Without Inlet Pressure; User Interfaces - Grundfos Hydro Multi-E Series Installation And Operating Instructions Manual

9.3 Hydro Multi-E in system without 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.
Ensure that the dry-run protection device is
appropriate for no or low inlet pressure.
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 there is no
pressure on water side of tank.
3. Connect water and power supplies to the system.
4. Open all pump inlet valves.
5. Close all pump outlet valves, and prime all pumps and the
inlet pipe.
Vent screw
Fig. 21 Position of vent screw and filling screw
6. Installation, proceed as
Filling screw
6. Switch on the power supply with the main switch.
7. Start pump 1 by pressing the start/stop button on the pump
control panel.
8. Vent pump 1 using the vent screw.
9. Slowly open the outlet valve approximately 50 %.
10. Repeat steps 9 and 11 for the other pumps in the system.
11. Slowly fully open all pump outlet valves.
12. Wait for a few minutes.
13. Set the desired outlet pressure.
If you change the outlet pressure, change the
diaphragm tank precharge pressure accordingly.
14. 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

10. User interfaces

WARNING
Hot surface
Death or serious personal injury
- Only touch the buttons on the display as the
product may be very hot.
You can configure pump settings using the following user
interfaces:
• HMI200
See section 10.1 HMI200.
• HMI300 (graphical display)
See section 10.2 HMI300 (graphical
• Grundfos GO Remote
See section 11. Multimaster
If the power supply is switched off, the settings will be stored.
or HMI300.
display).
function.
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