19
AGUADENS
COSMOGAS
5.11.1 - Power supply cable connection
Proceed as follows to connect the power supply cable (refer
to figure 5.9):
1.- use a three-polar cable with double isolation, with
minimum section of 1.5 mm²
2.- remove the casing from the appliance following the
relevant instructions in paragraph 8.2;
3.- rotate the panel “A” towards the front of the appliance;
4.- operate on the flaps “C” and open the lid “B” as
indicated by the arrow;
5.- lay the power supply cable through the fairlead in
proximity of the contacts “L1”, “N” and earth symbol;
6.- strip the cable, making sure to keep the earth cable
(yellow green) 20 mm longer than the other two;
7.- connect the yellow-green cable to the earth terminals
(see symbol)
8.- connect the brown cable (Phase) to the terminals L1
9.- connect the blue cable (Neutral) to the terminals N
5.12 - D.H.W. buffer tank
hydraulic layout
The hydraulic connection must be made as in figure 5.10.
Proceed as follows for the electric connection (refer to the
figure 5.9):
1.- disconnect the electric power supply from the appliance;
2.- disconnect and remove the temperature sensor (detail
“44” in figure 3.1) from the domestic hot water outlet pipe;
3.- lay a bi-polar electric cable with minimum section of 1.5
mm², which goes from the appliance to the storage tank
temperature sensor and connect it to the appliance at
terminalss “8” and “9” (SB);
5 - INSTALLATION
Figure 5.10 - water connection to the storage tank
KEY
1 AGUADENS water heater
2 Recirculation (if activated) *
3 Domestic hot water outlet
4 Gas inlet
5 Cold water
6 Storage tank
7 Storage tank load pump
8 Storage tank sensor
9 Domestic utilities
10 Hydraulic safety unit (by the installer)
11 Cold water inlet
12 Some state require this safety
pressure-temperature relief valve
* The recirculation line is not mandatory.
4.- connect the other end of the cable to the storage tank
temperature sensor;
5.- introduce the temperature sensor inside the storage tank
sample point (see figure 5.10 detail “8”).
6.- Connect the electric power of the storage tank pump (see
figure 5.10 detail “7”) to “PE” terminals of the water heater.
The AGUADENS appliances can be connected to a
storage tank even following installation. In this case,
the parameter
3012
must be set at the value of
1
.
The temperature of the water stored inside the storage tank
can be selected by the user in a range between 40 and
70°C.
ATTENTION !!! A domestic hot water
temperature level exceeding 51°C can cause permanent
injury/damage to persons, animals and objects.
Children, the elderly and disabled must be protected
against the potential risks of scalding, by introducing
devices that limit the temperature of use of domestic
hot water to utilities.
5.12.1 - Anti- legionella precaution
If the appliance is connected to a storage tank for the
preparation of domestic hot water, a disinfection cycle is
envisioned against the legionella bacterium. This cycle
envisions taking the storage tank to a temperature of 60°C
(temperature at which the legionella bacteria dies) at least
every week. It is for this reason that the water (at certain
times) can reach the utilities at a higher temperature that
than set with the relative command.
ATTENTION !!! A domestic hot water
temperature level exceeding 51°C can cause permanent
injury/damage to persons, animals and objects.
Children, the elderly and disabled must be protected
against the potential risks of scalding, by introducing
devices that limit the temperature of use of domestic
hot water to utilities.
5.12.2 - External secondary return
configuration
If the appliance is envisioned with external recirculation
unit, the recirculation cut-off valve (detail of figure 4.2) must
be turned to the closed position.
