Functions; Pump Construction; Servicing The Product - Grundfos Unilift AP35B Installation And Operating Instructions Manual

7.4 Functions

Pump with float switch
The float switch enables automatic start and stop of
the pump according to the level of the pumped liquid.
Pump without float switch
A pump without a float switch requires manual
external start and stop.

7.5 Pump construction

The main components of the pump appear from the
table below and fig. B in the appendix. See page 17.
Pos. Description
6 Inlet part
26 Spring clamps
37, 37a O-ring
49 Impeller
50 Pump housing
66 Washer
67 Lock nut
84 Ring stand
105a Shaft seal
150 Motor
182 Cable entry
189, 190 Pump handle
193, 194 Screws

8. Servicing the product

DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before
starting any work on the product.
Make sure that the power supply
cannot be accidentally switched
on.
CAUTION
Biological hazard
Minor or moderate personal injury
- Before carrying out maintenance
and service, flush the pump
thoroughly with clean water.
- After dismantling the pump, rinse
the pump parts in clean water.
CAUTION
Sharp element
Minor or moderate personal injury
- Wear protective gloves.
Service must be carried out by
specially trained persons.
Furthermore, all rules and regulations
covering safety, health and
environment must be observed.
Clean the pump before service. See section
8.1 Cleaning the pump.
Check the function of the pump, inspect it for
damage and replace the oil once a year. If the pump
is used for pumping liquids containing abrasive
particles or it is operating continuously, replace the
oil at shorter intervals. See the table below.
In the case of long operating time or continuous
operation, replace the oil as follows:
Liquid
temperature
[°F (°C)]
68 (20)
104 (40)
131 (55)
The pump contains approximately 60 ml non-
poisonous oil.
Used oil must be disposed of in accordance with
local regulations.
If the drained oil contains water or other impurities,
the shaft seal must be replaced.
The oil must be
replaced after
4500 operating hours
3000 operating hours
1500 operating hours
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