Electrical Connection 13 Note - Grundfos AQtap Installation And Operating Instructions Manual

4.8 Electrical connection
4.8.1 Safety instructions
DANGER
ELECTRIC SHOCK
Switch off the power supply, both grid and solar,
before making any connections.
The AQtap cabinet must only be opened by
authorised and qualified staff.
All electrical connections must be carried out by a
qualified electrician in accordance with local
regulations.
Stripped parts of wires must not protrude from
terminals.
DANGER
ELECTRIC SHOCK
AQtap with grid power supply must be connected to
an external mains switch with a minimum contact gap
of 3 mm in all poles.
If an AQtap with grid power supply is connected to an
electric installation where an earth leakage circuit
breaker (ELCB/RCD) is used as an additional
protection, this ELCB/RCD must trip when earth fault
currents with DC content (pulsating DC) occur. The
ELCB/RCD must be marked with both symbols
shown below.
We recommend to use armoured cables or run
Caution
cables in conduits on the outside of the AQtap.
All used and unused cable entries of the cabinet
must be sealed after connection to prevent animals
Caution
from entering the AQtap.
4.8.2 General
Check that the supply voltage and frequency correspond to the
values stated in section
13. Technical data
Observe section
7.1.1 Power supply.
Observe section
Power supply
4.8.3 Opening the power supply unit
1. Unscrew the screws at the front cover with a flat or torx
screwdriver TX10.
2. Remove the front cover from the power supply unit.
and on the nameplate.
requirements.
4.8.4 Grid connection
For grid connection use a cable according to the
following specification:
Note
- wire cross section: 0.75 - 2.5 mm
- cable diameter: ∅7 mm - ∅12 mm.
1. Pull the power supply cable through one of the bigger (M20)
cable glands of the AQtap cabinet.
2. Lead the cable aside the internal battery without tension and
then through one of the bigger (M20) cable glands of the
power supply unit.
3. Strip the cable covering to a length of approximately 3-5 cm
and the wires to a length of 7 mm.
4. Connect the wires to the power plug according to the imprint
on the power board, and tighten the screws.
– Connect phase line (L) to L, neutral line (N) to N and
protective earth (PE) to the middle terminal with earthing
sign.
5. Tighten the cable gland at the power supply unit and at the
cabinet.
6. Proceed with solar power connection, or refit the front cover of
the power supply unit and tighten the screws in the cover with
0.8 Nm.
4.8.5 Solar panel connection
For solar panel connection use a cable according to
the following specification:
Note
- wire cross section: 0.75 - 2.5 mm
- cable diameter: ∅7 mm - ∅12 mm.
Ensure correct polarity!
Caution Check the polarity with a multimeter before
connecting the cables from the solar panels.
1. Pull the solar panel cable through one of the bigger (M20)
cable glands of the AQtap cabinet.
2. Lead the cable aside the internal battery without tension and
then through one of the bigger (M20) cable glands of the
power supply unit.
3. Strip the cable covering to a length of approximately 3-5 cm
and the wires to a length of 7 mm.
4. Connect the wires to the solar panel plug according to the
imprint on the power board and tighten the screws.
5. Tighten the cable gland at the power supply unit and at the
cabinet.
6. Refit the front cover of the power supply unit and tighten the
screws in the cover with 0.8 Nm.
4.8.6 Internal battery
The internal battery is supplied charged. As soon as
Caution
it is connected there is power on the AQtap.
Caution
Do not short-circuit the two poles of the batteries.
Ensure correct polarity!
Caution
• The cables of the internal battery are connected in the power
supply unit and led through a cable gland.
• The red (+) cable is connected to the plus (+) pole of the
battery.
• The blue (-) cable is placed securely, so it cannot touch the
battery poles during transportation.
Connecting the internal battery
1. Connect the blue battery cable to the minus (-) pole (left side
of the battery).
2
2
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