Receiving The Product; Lifting The Product; Installation Requirements; Location - Grundfos GT-H Instructions D'installation Et D'utilisation

Pos. Description
13 Production code (year and week)
14 Marks of approval
15 Notified body
16 Production company

3. Receiving the product

3.1 Lifting the product

If the GT tank has lifting eyes, use all lifting eyes.
Lifting the tank

4. Installation requirements

Installation and operation must comply
with local regulations and accepted codes
of good practice.
Before installation, check the following:
• Do the GT tank specifications correspond to your
order?
• Are all visible parts intact?
• Is the maximum system pressure lower or equal
to the maximum operating pressure for the GT
tank? See tank nameplate.

4.1 Location

• The GT tank must be installed in the outlet pipe as
close to the pump as possible.
• The GT tank must be installed in a frost-free
room. It must be possible to inspect the GT tank
from all sides.
• The gas-filling valve, water shut-off, and outlet
must be accessible, and the nameplate must be
visible.
• The GT tank must be installed so that it is not
stressed by the pipes. If vibrations are likely to
occur, we recommend that the GT tank is installed
so that vibrations are absorbed.

4.2 Precharge pressure

The GT tanks are supplied from factory with a
precharge pressure. See tank nameplate.
The precharge pressure must be adjusted according
to the actual application and the installed pump.
The precharge pressure must be slightly below the
pump cut-in setting.
Recommended precharge pressures:
• 0.9 x setpoint for fixed-speed pumps
• 0.7 x setpoint for variable-speed pumps.
Precharge pressure
4.2.1 Adjusting the precharge pressure
If there is no precharge pressure in the
tank, you must fill the tank with nitrogen.
If the precharge pressure is not suitable for the
application, it should be adjusted according to the
following steps:
1. Use a suitable pressure gauge to check the
precharge pressure.
2. We recommend using nitrogen to achieve the
recommended precharge pressure.

4.3 Maximum operating pressure

The maximum operating pressure of the pump (P2)
and the actual inlet pressure (P1) must not exceed
the maximum operating pressure of the GT tank (P3).
See fig. Maximum operating pressure.
See pump and tank nameplates.
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