Ariston Nuos Split Flex 200L, Manual

Page: 47 / 152

Heat pump water heater – TECHNICAL INFORMATION FOR INSTALLERS
45
WARNING:
BEFORE YOU GET ACCESS TO TERMINALS, ALL SUPPLY CIRCUITS MUST BE DISCONNECTED
It is advisable to carry out a check on the electrical system to verify conformity to the regulations in force. Verify that the
electrical system can suitably withstand the water heater’s maximum power consumption values (refer to the data plate),
in terms of the size of the cables and their conformity to the regulations in force. It is forbidden to use multiple outlet
sockets, extension cables or adaptors.
The earth connection of the appliance is required. It is forbidden to use piping
from the water, heating and gas systems for earthing the appliance.
Prior to operating the machine, make sure that the electricity mains voltage conforms to the value indicated on the
appliance’s data plate. The manufacturer of the appliance shall not be held liable for any damage caused by failure to
earth the system or due to anomalies in the electric power supply. To disconnect the appliance from the mains, use a
bipolar switch complying with all applicable IEC-EN regulations in force (minimum distance between contacts 3 mm,
switch preferably equipped with fuses).
The appliance must comply with the European and national standards, and must be protected by a 30 mA RCD.
WARNING connecting cables between the two units should not go near electrical boxes, data transmission
systems and wireless (wi-fi router) or in close proximity to other cables.
To perform electrical connections refer to fig. 4
PERMANENT ELECTRICAL CONNECTION (24h/24h)
Fig. 13
Use this configuration whenever users do not have a two-tier electricity rate.
The water heater will always be connected to the power supply network to ensure 24 h operation.
ELECTRICAL CONNECTION WITH TWO-TIER ELECTRICITY RATE (8h/24h)
Fig. 14
If user has a dual electrical power supply and a suitable meter, during the hours when the product is
not powered protection from corrosion via impressed current anode is ensured by rechargeable
batteries that must be inserted as they are not supplied with the product (3 AA-type rechargeable
batteries, minimum 2100 mAh).
ELECTRIC CONNECTION WITH TWO-TIER RATE AND HC-HP SIGNAL (24h/24h)
Fig. 15
Offers the same cost advantages compared to the two-tier rate configuration but, additionally, it
allows for obtaining rapid heating thanks to the BOOST mode that
activates heating even with the
HP rate.
1) Connect a bipolar cable to the appropriate signal contacts on the meter.
2) Connect the signal bipolar cable to the indicated terminal which is located inside the product, close
to the supply terminal.
WARNING: the signal cable must be inserted in the hole beneath the power supply cable then
anchored with suitable cable clips located inside the product, along the same route of the power
supply cable, and tightened in the cable glands near the appropriate terminal; make a suitably-sized
hole in the rubber rings for the passage of the cable.
3) Activate the HC-HP function through the installer menu (see Paragraph 7.6).
5. INITIAL START-UP
Once the appliance is connected to the hydraulic and electric systems, the water heater must be filled with water from
the domestic water supply network. In order to fill the water heater, it is necessary to open the central tap of the domestic
network supply and the nearest hot water tap, while making sure that all the air in the tank is gradually expelled.
Visually inspect for possible water leaks from the flange and pipe fittings and gently tighten them, if necessary.
The product is not supplied with batteries.
In the event of installation with batteries, use 3 type AA, 1.2V, 2100 mAh minimum, rechargeable batteries.
These should be inserted carefully observing the correct polarity, in the special seat located beneath the
frames. These will ensure correct operation of the impressed current anode also during any electrical power
cuts. The appliance will automatically recharge them.