Applications; Features And Benefits; Identification; Operating Conditions - Grundfos SP Series Installation And Operating Instructions Manual

During unpacking and prior to installation, make
sure that the pump is not dropped or
mishandled.
The motor is equipped with an electrical cable.
Under no circumstance should the
electrical cable be used to support
Caution
the weight of the pump.
You will find a loose data plate with an adhesive
backing with the pump. The nameplate should be
completed in pen and attached to the control box.

1.4 Applications

Grundfos Large SP submersible pumps are
suitable for:
• Groundwater supply to waterworks
• irrigation in horticulture and agriculture
• groundwater lowering (dewatering)
• pressure boosting
• industrial applications
• domestic water supply.

1.5 Features and benefits

• State-of-the-art hydraulics provide high
efficiency and low operating costs.
• 100 % stainless steel components inside and
outside for long service life.
• Sand resistant.
• Resistant to aggressive water.
• Motor burnout protection via CU 301.
• Dry-running protection.
• Monitoring, protection and communication via
protection unit MP204, and remote control,
R100.

1.6 Identification

1.6.1 Type key
Example 475
Rated flow rate in gpm
Type range
Stainless steel parts of material
S = AISI 304
N = AISI 316
R = AISI 904L
Hp of motor
Number of impellers
First reduced-diameter impeller (A, B or C)
Second reduced-diameter impeller (A, B or C)

2. Operating conditions

Flow (Q): Max. 1,400 gpm (318 m
Head (H): Max. 2,100 ft (640 m)
Liquid temp: + 32 °F to + 140 °F (0 °C to +60 °C)
Install. depth Max. 1,968 ft (599 m)
4
S 500 - 5 - A B
3
/h)

3. Installation

3.1 Pre-installation checklist

Before beginning installation, the following
checks should be made:
• Condition of the well
• condition of the water
• installation depth
• electrical supply
• wire cable type.
These checks are all critical for the proper
installation of this submersible pump.
3.1.1 Condition of the well
If the pump is to be installed in a new well, the
well should be fully developed and bailed or
blown free of cuttings and sand. The stainless
steel construction of the Grundfos submersible
make it resistant to abrasion; however, no pump,
made of any material, can forever withstand the
destructive wear that occurs when constantly
pumping sandy water.
If this pump is used to replace an oil-filled
submersible or oil-lubricated line-shaft turbine in
an existing well, the well must be blown or
bailed clear of oil.
Determine the maximum depth of the well, and
the draw-down level at the pump's maximum
capacity. Pump selection and setting depth
should be based on this data.
The inside diameter of the well casing should be
checked to ensure that it is not smaller than the
size of the pump and motor.
3.1.2 Pumped liquids
Submersible pumps are designed for pumping
clear and cold water that is free of air and gasses
and clean, thin non-explosive liquids without
solid particles or fibers. Decreased pump
performance and life expectancy can occur if the
water is not cold and clear or contains air and
gasses.
Maximum water temperature should not exceed
+102 °F (+38 °C). Special consideration must be
given to the pump and motor if it is to be used to
pump water above 102 °F (+38 °C).
The Grundfos stainless steel submersible is
highly resistant to the normal corrosive
environment found in some water wells. If water
well tests determine the water has an excessive
or unusual corrosive quality, or exceeds 102 °F
(+38 °C), contact your Grundfos representative
for information concerning specially designed
pumps for these applications.

3.2 Preparation

Warning
Before starting work on the
pump, make sure that the
electricity supply has been
switched off and that it cannot be
accidentally switched on.