Checking The Direction Of Rotation; Maintenance; Frost Protection; Cleaning - Grundfos CM 1 Manual De Instrucciones

8.3 Checking the direction of rotation

The description below applies to
Note
three-phase motors only.
The motor fan cover has an installation indicator.
See fig. 10. Based on the motor cooling air, it
indicates the direction of rotation of the motor.
Before the motor is started for the first time or if the
position of the indicator has been changed, the
indicator function should be checked, for instance by
moving the indicator field with a finger.
To determine whether the direction of rotation is
correct or wrong, compare the indication with the
table below.
Indicator field
Black
White/reflecting
* To reverse the direction of rotation, switch off the
power supply and interchange any two of the
incoming supply wires.
Indicator field
Fig. 10 Installation indicator
The indicator can be placed in various positions on
the motor, but it must not be placed between the
cooling fins close to the screws holding the fan
cover.
The correct direction of rotation is also shown by
arrows on the motor fan cover.
Direction of rotation
Correct
Wrong*

9. Maintenance

Warning
Before starting work on the pump,
switch off the power supply. Make sure
that the power supply cannot be
accidentally switched on.
Warning
Make sure that the escaping water does
not cause injury to persons or damage
to the equipment.
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, it must be cleaned
and checked regularly. Take the enclosure class of
the motor into account when cleaning.
The motor has maintenance-free, greased-for-life
bearings.

9.1 Frost protection

Pumps which are not being used during periods of
frost should be drained to avoid damage.
Remove the filling and drain plugs from the pump.
See fig. 8.
Do not refit the plugs until the pump is taken into
operation again.
Before start-up after a period of
inactivity, the pump and the suction
Caution
pipe should be completely filled with
liquid. See section 8. Startup.

9.2 Cleaning

Prior to a long period of inactivity, the pump must be
flushed with clean water to prevent corrosion and
deposits in the pump.
Use acetic acid to remove possible lime deposits
from the pump.
10. Service
If used for a liquid which is injurious to
Caution
health or toxic, the pump will be
classified as contaminated.
Before the pump is returned to Grundfos for service,
the safety declaration at the end of these instructions
must be filled in by authorised personnel and
attached to the pump in a visible position.
If Grundfos is requested to service the pump, it must
be cleaned before it is returned.
If proper cleaning is not possible, all relevant
information about the pumped liquid must be
provided.
If the above is not fulfilled, Grundfos can refuse to
accept the pump for service.
Possible costs of returning the pump are to be paid
by the customer.
The safety declaration can be found at the end of these
instructions (only in English).
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