Applications - Grundfos AQtap Installation And Operating Instructions Manual

7.1.1 Power supply
The AQtap can be operated with grid and / or solar power. It uses
the power supply in the following hierarchy:
1. solar power
2. grid power
3. battery.
Using solar power requires a connected battery. The internal
battery is loaded when grid or solar power is available, and is
used as backup power for approximately 12 hours of operation,
assuming 250 tappings of 20 l at a flow rate of 25 l/min and idle
time between the tappings.
After discharging the backup battery, tapping water will not be
possible right away when power (solar radiation) is on again, until
the battery is recharged. A discharged battery takes 12-14 hours
of constant grid supply to be recharged. If water is tapped while
recharging, it may take longer. If the internal battery is not
powerful enough, it can be substituted by an external battery with
MPPT charger.
The internal battery is a wear part. If the external
power supply is insufficient or instable, the battery is
often completely discharged and used in a low state
Note
of charge. As a consequence the battery can be worn
out within a few weeks.
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
backup battery, an external battery with MPPT solar
charger can be used.
See section
Power supply requirements.
7.1.2 Water supply
The water supply must provide clean drinking water. See
section
Water supply requirements.
18

7.2 Applications

7.2.1 Intended use
• The AQtap is intended for dispensing drinking water and
handling the smart cards for various actions. The quality of the
dispensed water must comply with the drinking water
standards of the WHO.
• The aqTOP is intended for handling the smart cards for
various actions, it does not include the hydraulic part.
• The AQtap / aqTOP interface is intended to be operated with
fingers and smart cards only.
• The smart cards are intended for handling water credits and
accessing the AQtap functions according to the different rights
of the smart card holders.
Observe the technical data specified in section
data.
7.2.2 Improper use
DANGER
POISONING
Improper use can lead to personal injury!
The AQtap dispenser must be used with water
complying with WHO drinking water standards.
All parts and materials used in the hydraulic system
must be suitable for drinking water appliances.
Improper use can lead to damage to the equipment!
The AQtap dispenser must be used with water
complying with WHO drinking water standards and
Caution
the technical data.
The AQtap interface must only be operated with
smart cards and with fingers.
The operational safety of the product is only guaranteed, if it is
used in accordance with section
• The AQtap must not be used for other media than drinking
water.
• The AQtap interface must not be operated or treated with any
kind of tools or items.
• The AQtap must not be used if it is damaged, after improper
repair or after unauthorized modification.
Other applications or the operation of the AQtap in
ambient and operating conditions, which are not
approved, are considered improper and are not
Caution
permitted. Grundfos accepts no liability for any
personal injury or damage resulting from incorrect
use.
13. Technical
7.2.1 Intended use.