Grundfos AQtap Installation And Operating Instructions Manual page 9

All used and unused cable entries of the cabinet
must be sealed after connection to prevent
Caution
animals 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 and on the nameplate.
The AQtap can be operated with grid and / or solar power. The
internal battery is used as a backup power for approximately 12
hours of operation. If the internal battery is not powerful enough,
it can be substituted by an external battery.
Depending on the solar radiation and degree of
AQtap utilization the internal battery and
charging with solar power can be insufficient.
Note
In cases where tapping is not possible after using
the internal backup battery, an external battery
with MPPT solar charger can be used.
Observe section Power supply requirements.
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.
4.8.4 Grid connection
For grid connection use a cable according to the
following specification:
Note
- wire cross section: 0.75 - 2.5 mm²
- cable diameter: Ø 7 mm - Ø 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 trough one of the bigger (M20) cable glands of the power
supply unit.
3. Strip the cable covering to a length of approx. 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 mm²
- cable diameter: Ø 7 mm - Ø 12 mm
Ensure correct polarity!
Caution Check the polarity using 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 trough one of the bigger (M20) cable glands of the power
supply unit.
3. Strip the cable covering to a length of approx. 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
Caution
as it is connected there is power on the AQtap.
Do not short-circuit the two poles of the
Caution
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 + 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 - pole (left side of the
battery).
4.8.7 External battery
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.
An external battery replaces the internal battery.
• Use a 12 V rechargeable lead acid battery.
• The cables of the internal battery must be
Caution
disconnected both in the power supply unit
and at the battery, and they must be removed
from the AQtap to avoid unintended
connection between parts.
Do not short-circuit the two poles of the
Caution
batteries.
Ensure correct polarity!
Caution
When connecting an external battery it must be
Note
fully charged prior to connection.
Disconnecting the internal battery
1. Open the power supply unit, see section 4.8.3 Opening the
power supply unit.
2. Disconnect the blue cable from the - pole of the battery.
3. Disconnect the red cable from the + pole of the battery.
4. Disconnect the cables from the terminals.
5. Pull the battery cables out of the gable gland.
6. Remove the cables from the AQtap.
Connecting the external battery
1. Pull the disconnected battery cables through one of the
smaller (M16) cable glands of the AQtap cabinet.
2. Lead the cables aside the internal battery without tension and
then trough one of the smaller (M16) cable glands of the
power supply unit.
3. Strip the wires to a length of 7 mm.
4. Connect the wires to the battery 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.
7. Connect the red battery cable to the + pole (right side of the
battery).
8. Connect the blue battery cable to the - pole (left side of the
battery).
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