Maintenance; Frost Protection; Service - Andritz HP55 Serie Betriebsanleitung

Series HP 55

7. Maintenance

Before starting work on the pump, make sure
that all power supplies to the pump have been
switched off and that they cannot be accidentally
switched on.
Pump bearings and shaft seal are maintenance-free.
If the pump is to be drained for a long period of inactivity, remo-
ve 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.
Motor bearings:
Motors which are not fitted with grease nipples are mainte-
nance-free.
Motors fitted with grease nipples should be lubricated with a
high-temperature lithium-based grease, see the instructions on
the fan cover.
In the case of seasonal operation (motor is idle for more than
6 months of the year), it is recommended to grease the motor
when the pump is taken out of operation.

8. Frost protection

Pumps which are not being used during periods of frost should
be drained to avoid damage.
Drain the pump by loosening the vent screw in the pump head
and by removing the drain plug from the base.
Care must be taken to ensure that the escaping
water does not cause injury to persons or dama-
ge to the motor or other components.
In hot-water installations, special attention
should be paid 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.
HP 25-73 and HP 32-73:
Before replacing the drain plug in the base, screw the bypass
valve out against the stop, see fig. 7.
Fit the drain plug by tightening the large union nut followed by
the bypass valve.
20
Entleerungsstopfen
Umlaufventil
Fig. 7

9. Service

If a pump has been used for a liquid which is injurious to health
or toxic, the pump will be classified as contaminated.
If the manufacturer is requested to service the pump, he must
be contacted with details about the pumped liquid, etc. before
the pump is returned for service. Otherwise he can refuse to ac-
cept the pump for service.
Possible costs of returning the pump are 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 the
pump has been used for liquids which are injurious to health or
toxic.