Checking The Direction Of Rotation; Maintenance; Frost Protection; Cleaning - Grundfos AC Series Installation And Operating Instructions Manual

7.2 Checking the direction of rotation

The description below applies to three-
Note
phase motors only.
An arrow on the motor fan cover indicates the correct
direction of rotation.
The pump should rotate clockwise when viewed from
the motor end.
If the direction of rotation is wrong, switch off the
power supply and interchange any two of the
incoming supply wires.

8. Maintenance

Warning
Before starting work on the pump,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
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.

8.1 Frost protection

Pumps which are not being used during periods of
frost should be drained to avoid damage.
Remove the filling and drain plugs. See fig. 4.
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 7.1 Liquid filling.

8.2 Cleaning

Prior to a long period of inactivity, the pump must be
flushed with clean water to prevent corrosion and
deposits in the pump.

9. Service

If a pump has been used for a liquid
which is injurious to health or toxic,
Caution
the pump will be classified as
contaminated.
Before returning the pump 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 ensured that the pump is free from substances
that can be injurious to health or toxic. If the pump
has been used for such substances, the pump must
be cleaned before it is returned.
If proper cleaning is not possible, all relevant
information about the chemical 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 paid by the
customer.
The safety declaration can be found at the end of these
instructions (only in English).

9.1 Service documentation

Service documentation is available on
www.grundfos.com > International website >
WebCAPS > Service.
If you have any questions, please contact the
nearest Grundfos company or service workshop.
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