Changing The Control Box Position; Insulation Of Pump Housing; Electrical Installation - Grundfos ALPHA2 L Series Installation And Operating Instructions Manual

Fill the system with the liquid to be pumped or open
the isolating valves when the position of the control
box has been changed.

3.4 Changing the control box position

The control box position can be changed in steps of 90 °.
Possible or permissible positions and the procedure of changing
the position of the control box are illustrated in fig. 3.
Procedure:
1. Slacken and remove the four hexagon-socket head screws
holding the pump head with a tee key (M4).
2. Turn the pump head to the desired position.
3. Insert and cross-tighten the screws.

3.5 Insulation of pump housing

Insulation of pump housing
Fig. 4
Limit the heat loss from the pump housing and pipes.
The heat loss from the pump and pipes can be reduced by
insulating the pump housing and the pipe. See fig. 4.
As an alternative, polystyrene insulating shells can be fitted to the
pump. See section
8. Accessories.
Do not insulate the control box or cover the operating
panel.

4. Electrical installation

DANGER
Electric shock
Death or serious personal injury
- All electrical connections must be carried out by a
qualified electrician in accordance with local
regulations.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before starting any
work on the product. Make sure that the power
supply cannot be accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
- Connect the pump to earth.
DANGER
Electric shock
Death or serious personal injury
- If national legislation requires a Residual-Current
Device (RCD) or equivalent in the electrical
installation, or if the pump is connected to an
electric installation where an RCD is used as an
additional protection, this must be type A or better,
due to the nature of the pulsating DC leakage
current. The RCD must be marked with the symbol
shown below:
The pump is not a safety component and cannot be
used to ensure functional safety in the final
appliance.
The pump requires no external motor protection.
• Check that the supply voltage and frequency correspond to
the values stated on the nameplate. See section
7.1 Nameplate.
• Connect the pump to the power supply with the plug supplied
with the pump as shown in section
Light in the operating panel shows that the power supply has
been switched on.
4.1 Assembling the plug
5