Frost Protection; Service; Service Kits And Manuals - Grundfos CR Serie Instrucciones De Instalación Y Funcionamiento

10. Frost protection

Drain pumps which are not being used during periods of frost to
avoid damage.
Drain the pump by loosening the vent screw in the pump head
and by removing the drain plug from the base.
Warning
Pay attention to the direction of the vent hole and
make sure that the escaping water does not cause
injury to persons or damage to the motor or other
components.
In hot-water installations, pay special attention to the
risk of injury caused by scalding hot water.
Do not tighten the vent screw and replace the drain plug until the
pump is to be used again.
CR, CRI, CRN 1s to 5
Before replacing the drain plug in the base, screw the bypass
valve out against the stop. See fig. 22.
Fig. 22 Location of drain plug and bypass valve
Fit the drain plug by tightening the large union nut followed by the
bypass valve.
Drain plug
Bypass valve

11. Service

We recommend that you repair pumps with motors of 7.5 kW and
up at pump site. Necessary lifting equipment must be available.
If you have used a pump for a liquid which is toxic or
injurious to health, the pump will be classified as
Note
contaminated.
If Grundfos is requested to service the pump, contact Grundfos
with details about the pumped liquid, etc. before the pump is
returned for service. Otherwise, Grundfos can refuse to accept
the pump for service.
Possible costs of returning the pump are to be paid by the
customer.
However, any application for service, no matter to whom it may
be made), must include details about the pumped liquid if you
have used the pump for liquids which are toxic or injurious to
health.

11.1 Service kits and manuals

Service documentation is available in Grundfos Product Center
(http://product-selection.grundfos.com/).
If you have any questions, please contact the nearest Grundfos
company or service workshop.
15