Terminal Box Positions; Changing The Terminal Box Position; Electrical Connection - Grundfos CM-L Montage- Und Betriebsanleitung

3.5 Terminal box positions

At the bottom close to the pump housing, the stator
housing has two drain holes, 5 x 10 mm, to enable
condensed water to escape. The drain holes must
point downwards. See the arrows in fig. 5. Do not
consider the vent holes in the stator housing as drain
holes.
The possible terminal box positions are shown in fig.
5. The positions apply to mounting in both vertical
and horizontal pipes.
Fig. 5 Terminal box positions
Only turn the terminal box to the positions
in fig. 5.
Fig. 6 Standard position

3.5.1 Changing the terminal box position

WARNING
Pressurised system
Death or serious personal injury
- Before dismantling the pump, drain the
system or close the isolating valve on
either side of the pump. The pumped
liquid may be scalding hot and under
high pressure.
Change the terminal box position as follows:
1. Remove the four screws holding the pump head.
2. Turn the pump head to the desired position.
3. Refit the four screws.
Do not start the pump until the system has been filled
with liquid and vented. Furthermore, the required
minimum inlet pressure must be available at the
pump inlet. See section 10.4 Minimum inlet
pressure.
When the terminal box position has been
changed, turn the nameplate on the end of
the motor so that the cutout points
downwards. This allows water from a
possible venting to escape.
To change the nameplate position, ease the outer
edge of the nameplate at the cutout with a
screwdriver, turn the nameplate to the new position,
and push it into place.

3.6 Electrical connection

The electrical connection must be carried out
according to local regulations.
DANGER
Electric shock
Death or serious personal injury
- Do not make any connections in the
terminal box unless you have switched
off the power supply.
- Connect the pump to earth.
- Connect the pump to an external main
switch with a minimum contact gap of 3
mm in all poles.
DANGER
Electric shock
Death or serious personal injury
- It must be possible to lock the main
switch in the off position. Type and
requirements as specified in EN
60204-1, 5.3.2.
Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
You can use earthing or neutralisation for protection
against indirect contact. You can use a current- or
voltage-operated earth-leakage circuit breaker as
extra protection.
3.6.1 Connections in the standard module
Connect the pump to the power supply via an
external contactor.
Carry out the electrical connection as shown in the
diagram inside the terminal box cover.
3.6.2 Frequency converter operation
CM-L pumps cannot be used with an external
frequency converter.
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