Installing The Pump; Installation Depth; Generator Operation; Starting The Pump For The First Time - Grundfos SQ Serie Instrucciones De Instalación Y Funcionamiento

9. Installing the pump

9.1 Installation depth

The dynamic water level should always be above
the pump, see fig. 9.
A = Dynamic water level
B = Static water level
C = Minimum 3 inch well diameter
D = Drawdown
E = Installation depth below static water level.
Maximum 500 feet.
B
A
Fig. 9 Installation depth
Procedure
To install the pump, proceed as follows:
1. Attach the enclosed data plate sticker at the well
head.
2. Check the well for proper clearance. The well
must be at least 3 inches in diameter.
It is a good idea to check the well for clearance
using a plumb ring (2.95 ø x 10 in.).
3. Attach the first section of riser pipe to the pump.
4. Lower the pump into the well. Make sure the
motor cable is not damaged when the pump is
lifted or lowered into the well, especially in 3 inch
wells.
Note: Do not lower or lift the pump using the
motor cable.
5. When the pump has been installed to the
required depth, the installation should be finished
by means of a well seal.
Note that the dynamic water level should always
be above the pump.
8
D
E
C
6. Loosen the safety wire so that it becomes
unloaded and lock it to the well seal using a cable
clamp.
7. Complete the electrical connections.
Note: The pump must never be connected to a
capacitor or to another type of control box than
CU 300 or CU 301.
Installation depths
Maximum installation depth:
500 feet below the static water level.
Minimum installation depth:
1.75 feet below the dynamic water level.
Vertical installation
During start-up and operation, the pump must always
be completely submerged in water.
Horizontal installation
The pump must be installed at least 1.75 feet below
the dynamic water level.
If there is a risk that the pump might be covered by
mud, the pump must always be placed in a flow
sleeve.
Note: Do not lower or lift the pump using the motor
cable.

10. Generator operation

It is safe to operate the SQ/SQE with a generator.
The generator must be sized 50% above the P
(input power) values of the pump. See the following
table.
Motor Min.
generator size
[hp]
0.5 1200
0.75 1900
1.0 2600
1.5 2800

11. Starting the pump for the first time

When the pump has been connected correctly, the
pump should be started with the discharge valve
closed approximately one third.
Due to the soft start feature, the pump takes approxi-
mately 2 seconds to develop full pressure.
11.1 Motor cooling and
other considerations
• Make sure the well is capable of yielding a mini-
mum quantity of water corresponding to the pump
capacity.
• Do not start the pump until it is completely sub-
merged in the liquid.
• As the valve is being opened, the drawdown
should be checked to ensure that the pump
always remains submerged.
Recommended
generator
[W] output [W]
1500
2500
3200
3500
1