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Activating the function through PC tool E-products
Settings > Primary controller.
1. Select: Enabled proportional pressure.
2. Set: Influence at zero flow.
3. Set: Filter factor.
4. Select: Hmax / Enter value. Based on pump data.
5. Select: Qnom / Enter value. Based on pump data.
6. Select: Hnom / Enter value. Based on pump data.
Activating the function via the operating panel
This is only applicable when the function is enabled in PC Tool
E-products.
1. Press [RESET] for 4 seconds. Let go of the button when the
text "PPS" appears in the display.
2. Adjust the "PPS" value with the arrow up and arrow down
buttons.
The "PPS" value is defined in psi at zero flow.
9.3 Functions for tank-filling systems
9.3.1 Cascade control
The cascade control function for tank-filling systems is designed
to fill the tank with focus on protecting the piping and preventing
water hammer. The cascade is time-dependent and starts and
stops the pumps in a pre-defined sequence. See fig.
9.3.2 Standby pumps
Systems with more than two pumps will as default set one pump
as standby pump.
The status as standby pump alternates to ensure that all pumps
have equal numbers of operating hours.
9.3.3 Maximum level exceeded
This function protects against the risk of overfilling the tank. The
level is monitored and if the level is higher than 95 % of the height
of the tank, the pumps are stopped; the display indicates high
limit "H.L", and the "PT" indicator light is on.
9.3.4 Optional tank fill application panels
Optional panels include indicator lights controlled by float
switches that indicate if the high or low level is exceeded with
80 dB alarm.
10. Data communication
CU 323 must have a CIM module (Communication Interface
Module) fitted to be able to transfer data to the SCADA system or
to a mobile phone.
Various CIM modules are available, depending on the type of
network. See the Hydro Multi-B data booklet or contact Grundfos
for further information regarding CIM modules.
11. Servicing the product
WARNING
Electric shock
Death or serious personal injury
- Switch off the power supply before you start any
work on the product.
- Lock the main switch with a padlock to ensure that
the power supply cannot be accidentally switched
on.
11.1 Maintaining the product
11.1.1 Pumps
The internal pump parts are maintenance-free. It is important to
keep the motor clean in order to ensure adequate cooling of the
motor. If the pump is installed in dusty environments, clean and
check it regularly. Take the enclosure class of the motor into
account when cleaning.
The motor has maintenance-free, greased-for-life bearings.
11.1.2 CU 323
CU 323 is maintenance-free. It must be kept clean and dry.
Protect it against direct sunlight. Furthermore, CU 323 must not
be outside the ambient temperature range. See section
15. Technical
12. Protecting the product against frost
If pumps are not used during periods of frost, they must be
drained to avoid damage.
Follow these instructions:
1. Close the isolating valves before and after the pump.
2. Remove the filling and drain plugs.
3. Open the isolating valves and refit the plugs before the pump
is put into operation again.
WARNING
Electric shock
Death or serious personal injury
7
on page 8.
- Make sure that the escaping hot or cold liquid does
- In hot-water installations, pay special attention to
Do not fit the filling and drain plugs until the pump is to be used
again.
13. Taking the product out of operation
Switch off the main switch to take the booster system out of
operation.
WARNING
Electric shock
Death or serious personal injury
- Do not touch the conductors in front of the main
- Lock the main switch with a padlock to ensure that
Take individual pumps out of operation by switching off the
corresponding motor-protective circuit breaker, automatic circuit
breaker or fuse.
data.
not cause injury to persons or damage to the
equipment.
the risk of injury caused by scalding hot water.
switch as they are still energized.
the power supply cannot be accidentally switched
on.
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