Minimum Space; Installation Depths - Grundfos SQF Manual Del Usuario

3.1.1 Minimum space

Fig. Product and borehole diameters
Pos. Description
Minimum borehole diameter (recommended):
- Ø78 (3") for SQF 0.6, SQF 1, SQF 1.2, SQF 2.5.
A
- Ø105 (4") for SQF 3A, SQF 5A, SQF 7, SQF 9, SQF 14.
Borehole diameter should include: product diameter, well casing tolerance and borehole tolerance.
Product diameter:
B - Ø74 (3") for SQF 0.6, SQF 1, SQF 1.2, SQF 2.5.
- Ø101 (4") for SQF 3A, SQF 5A, SQF 7, SQF 9, SQF 14.

3.1.2 Installation depths

• Maximum installation depth:
• 150 m below the static water level, which is the level of water when the product is not in operation.
• Minimum installation depths:
• Vertical installation: During startup and operation, the product, including the level sensor, must be completely submerged in water.
• Horizontal installation: The level sensor must be installed at least 0.3 m below the dynamic water level, which is the level of water when
the pump is in operation. Note that the level sensor must be completely submerged in water and lifted above the product.
Fig. Horizontal installation
A
B
1
2
7