Starting Up The Product; Resetting The Product; Handling And Storing The Product; Handling The Product - Grundfos SQF Manual Del Usuario

Explanation of the equation
Symbol Unit
L [m]
MAX
U [V]
ΔU [%]
I [A]
2
ρ
[Ω mm /m]
2
ϥ
[mm ]
Maximum motor current
The maximum motor current depends on the motor properties and electrical installation. According to IEC 60364-5-52:2009 the installation and
cable must be dimensioned for a current that is higher than the maximum motor current.
Maximum recommended voltage drop
• According to IEC 60364-5-52:2009 for installation in domestic applications, the maximum recommended voltage drop is 5 % for cable
lengths up to 100 m.
• For installation in industrial applications and in regions where the IEC standard is not applicable, local regulations may require that a
different maximum value for voltage drop must be used for the calculation of the maximum cable length.
Specific resistance of the drop cables
The specific resistance of the drop cables supplied by Grundfos for SQ, SQE and SQF pumps is 0.02 Ω mm
Maximum cable lengths for Grundfos MSF 3 motors
Calculation of maximum cable length for the different motor sizes is based on a voltage drop of 5 % and a supply voltage of 240 V.
If the calculation above cannot be used, go to Grundfos Product Center for sizing.
Grundfos can supply submersible drop cables for any type of installation. Please contact Grundfos for more information.

4. Starting up the product

1. Make sure that the well can yield a quantity of water at least corresponding to the pump performance.
2. Submerge the pump completely in the water.
3. Switch on the power supply.
4. Check that the pump delivers water.
a. If the pump does not deliver water, see information on fault finding.
Related information
9. Fault finding the product

4.1 Resetting the product

1. Switch off the power supply for 1 minute. The pump is now reset.
2. Switch on the power and start the pump.

5. Handling and storing the product

5.1 Handling the product

See information on lifting the product.
Related information
3.2.1 Lifting the product
8. Taking the product out of operation

5.2 Storing the product

CAUTION
Crushing of feet
Minor or moderate personal injury
‐
Wear safety shoes when moving the product.
Storing a new product
Make sure that the storage temperature is within the permissible limits.
Storing a used product
If the product is not going to be used for a period of time, proceed as follows:
Description
Maximum cable length
Supply voltage
Maximum recommended voltage drop in percentage
Maximum motor current
Specific resistance of the cable
Cross-sectional area of the individual wires in the submersible drop cable
2
/m.
13