Digital Input; Data Communication; Maintenance; Pumps - Grundfos Hydro Multi-E Series Installation And Operating Instructions Manual

19. Digital input

Hydro Multi-E has a digital input for external faults. The input has
been factory-set to external fault and will be active in closed
condition.
Functional diagram: input for digital function
Digital function
(terminals 1 and 9)
H
H
10 s
If the digital input is active for more than 10 seconds (s), Hydro
Multi-E will stop because of an external fault.
The digital input is used for the dry-running protection.

20. Data communication

It is possible to connect the system to an external network. The
connection can be made via a GENIbus-based network or a
network based on another fieldbus protocol.
The system can communicate via CIM modules. This enables the
system to communicate with different types of network solutions.
A CIM module is an add-on communication interface module. The
CIM module enables data transmission between the pump and an
external system, for example a BMS or SCADA system.
For further information on CIM modules, see Grundfos Product
Center at www.grundfos.com or contact Grundfos.

21. Maintenance

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 start any work on the product.
Make sure that the power supply cannot be
accidentally switched on.
WARNING
Crushing of feet
Death or serious personal injury
- Use appropriate tools and lifting equipment for
maintenance.
WARNING
Harm of body
Death or serious personal injury
- Use hard hat.

21.1 Pumps

Pump bearings and shaft seals are maintenance-free.
If CRE or CRIE pumps are to be drained for a long period of
inactivity, remove one of the coupling guards to inject a few drops
of silicone oil on the shaft between the pump head and the
coupling. This will prevent the shaft seal faces from sticking.
38
Normal duty
Q
External fault
Q

21.2 Motors

Keep motor cooling fins and fan blades clean to ensure sufficient
cooling of the motor and electronics.
Motors above 7.5 kW must be lubricated according to the
recommended intervals and type of bearing grease stated on the
motor.

21.3 Breaker cabinet

The breaker cabinet is maintenance-free. Keep it clean and dry.

21.4 Service kits

See Grundfos Product Center at www.grundfos.com for service
manuals.

22. Taking the product out of operation

DANGER
Contaminated drinking water
- Death or serious personal injury
- Flush the system before starting it or after a
standstill period.
WARNING
Crushing of feet
Death or serious personal injury
- Use appropriate tools and lifting equipment when
dismantling the product.
DANGER
Electric shock
Death or serious personal injury
- Do not touch the conductors in front of the main
switch as they are still energised.
If the system is taken out of operation for at period of time, follow
the steps:
1. Shut down the system with the main switch in the breaker
cabinet.
2. To shut down a pump, switch off the circuit breaker of the
pump.

22.1 Frost protection

If pumps are not used during periods of frost, they must be
drained to avoid damage.
Drain the pump by loosening the vent screw in the pump head
and removing the drain plug from the base.
Do not tighten the vent screw or refit the drain plug until the
system is to be used again.

23. Startup the product after standstill

DANGER
Contaminated drinking water
- Death or serious personal injury
- Flush the system before starting it or after a
standstill period.
See section 9. Startup for further instructions.