7. Startup
DANGER
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 or controller.
‐ Before the system is started up, make sure that the
power supply is disconnected and cannot be
accidentally switched on.
‐ Tighten the wire connections.
DANGER
Electric shock
Death or serious personal injury
‐ Connect the motor to protective earth and protect
against indirect contact according to local regulations.
‐ Before the system is started up, make sure that there
is no short-circuit.
WARNING
Contaminated drinking water
Death or serious personal injury
‐ Flush the system before starting it in compliance with
local legislation.
WARNING
High temperature
Death or serious personal injury
‐ Before you operate, make sure that the system is
capable of driving this load, which is listed on the
nameplate.
CAUTION
Hot or cold surface
Minor or moderate personal injury
‐ Make sure that the escaping hot or cold liquid does not
cause injury to persons or damage to the equipment.
CAUTION
High noise level
Minor or moderate personal injury
‐ Use ear protection.
CAUTION
Sharp element
Minor or moderate personal injury
‐ Wear safety gloves.
7.1 Hygiene
Grundfos systems are functionally tested and may therefore contain
small amounts of residual water. Before using the system, it must
be rinsed or flushed thoroughly. This also applies if the system has
not been used for a longer period.
Rinsing and flushing must always be done in accordance with local
regulations and practices. Contaminated drinking water can
endanger health.
7.2
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 Installation, proceed as follows:
1. Check that Hydro Multi-E corresponds to the order and that no
single parts have been damaged.
2. Check that the precharge pressure in the diaphragm tank is 0.7
times the required outlet pressure (setpoint).
Measure the precharge pressure while the system is
pressureless.
3. Connect water and power supplies to the system.
4. Open all pump inlet and outlet valves.
5. Vent all pumps by means of the vent screws.
TM084843
Position of vent screws in systems with CME-A/-I pumps
TM052009
Position of vent screws in systems with CRI, CRIE pumps
Pos. Description
1 Vent screws
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. Repeat steps 7 and 8 for the other pumps in the system.
10. Set the desired outlet pressure.
If you change the outlet pressure, change the
diaphragm tank precharge pressure accordingly.
11. Check 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, see
sections Multimaster function or Control panels.
16
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