Start-Up; Maintenance And Service; Oil; Pump Construction - Grundfos Unilift AP35B Installations- Und Bedienanleitung

5. Start-up

Before start-up, the pump inlet must be submerged
in the pumped liquid.
Open the isolating valve, if fitted, and check the level
switch setting.
Note: The pump may be run briefly to check the di-
rection of rotation without being submerged in the
pumped liquid.

6. Maintenance and service

Before starting work on the pump, make
sure that the electricity supply to the pump
has been switched off and that it cannot be
accidentally switched on.
Before carrying out maintenance and service, it must
be ensured that the pump has been thoroughly
flushed with clean water. Rinse the pump parts in
water after dismantling.
Check the pump and replace the oil once a year.
If the pump is used for pumping liquids containing
abrasive particles or it is operating continuously,
the pump must be checked at shorter intervals.
Out of consideration for the personal
safety and health, this work must be car-
ried out by specially trained persons.
Furthermore, all rules and regulations cov-
ering safety, health and environment must
be observed.
During dismantling, caution should be ex-
ercised as there will be access to sharp
edges, etc. which may cut.
A possible replacement of the cable or the
level switch must be carried out by an au-
thorised Grundfos service workshop.

6.1 Oil

The pump contains approx. 60 ml non-poisonous oil.
Used oil must be disposed of in accordance with lo-
cal regulations.
If the drained oil contains water or other impurities,
the shaft seal should be replaced.

6.2 Pump construction

The construction of the pump will appear from the ta-
ble below and fig. D, page 102.
Pos. Description
50 Pump housing
37a O-ring
49 Impeller
150 Motor with flange
66 Washer
84 Base
67 Lock nut
6 Inlet part
105a Shaft seal
182 Level switch

6.3 Service kits

Service kit
Shaft seal, standard
Shaft seal, FKM
Oil

6.4 Contaminated pumps

Note: If a pump has been used for a liquid which is
injurious to health or toxic, the pump will be classi-
fied as contaminated.
If Grundfos is requested to service the pump,
Grundfos must be contacted 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 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 liq-
uids which are injurious to health or toxic.
Part number
96429307
96429308
96010646
9