Starting; Product Introduction; Product Description; Applications - Grundfos Unilift AP35B Installation And Operating Instructions Manual

6. Starting

Before starting the pump, check that the following
requirements are fulfilled:
• The pump is submerged in the liquid. During
normal operation, the pump must be below the
surface of the liquid. See fig. 5.
• The pump is placed on a base so that the pump
inlet is not blocked by silt, mud or similar
materials.
• The pipe or hose connection is tight.
• The outlet pipe or hose is open, that is the hose
is not bent, etc.
• The pump is connected to the power supply in
accordance with the instructions.
• For pumps with a float switch, check that the float
switch can move freely. See section
4.5 Adjustment of cable length for a float
Startup procedure
1. Switch on the pump and check:
– that the pump is operating properly
– that water is being pumped.
2. For pumps with a float switch, check that the float
switch will allow the pump to pump down to the
chosen level according to fig. 5.
3. If you want to pump below this level, hold the
float switch in the vertical position.

7. Product introduction

7.1 Product description

The Grundfos Unilift AP35B and AP50B pumps are
single-stage, submersible pumps designed for the
pumping of wastewater.
The pump is designed for automatic operation with a
float switch or for manual operation.
The pump can be installed in a permanent
installation, on auto-coupling or as a free-standing
pump, or used as a portable pump.
The pumps are capable of pumping water containing
a limited quantity of solids without being blocked or
damaged.
8

7.2 Applications

switch.
Incorrect use of the pump, for example resulting in
blockage or wear of the pump will void the pump's
warranty. Note that the pump is not suitable for these
liquids:
• liquids containing long fibers
• flammable liquids (oil, gasoline, etc.)
• aggressive liquids.
• liquids containing solids exceeding the pump's
recommended maximum particle size.
The pump is capable of pumping water containing a
limited quantity of spherical particles. See
section Maximum particle size
Pumping of spherical particles exceeding the
maximum particle size for the pump may block or
damage the pump.
DANGER
Electric shock
Death or serious personal injury
- Do not use the pump in or at
swimming pools, garden ponds,
etc. when there are persons in the
water.
If the pump has been used for very
dirty or chlorinated water, flush the
pump thoroughly with clean water
after use.
Wear gloves and other suitable
personal protective equipment in
accordance with local regulations.
Observe local regulations on any
exposure to wastewater.
The product is not designed for
pumping stones and similar materials.
on page 15.