COSMOGAS AGUADENS Series, Installation, Operating And Maintenance Manual

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23
AGUADENS
COSMOGAS
5 - INSTALLATION
5.13 - Connection water
heater to Storage tank
If the storage tank is charged with internal pump (figure
4-7), must consider the residual head of figure 5-13 to size
the system.
When the water heater is envisioned with storage tank, as
shown in figure 4-7, before connect must be inserted into
the appliance the by-pass valve “C” as shown in figure
5-12. Otherwise, if the storage tank is charged with external
pump (see figure 4-6, 4-8 and 5-14), it is not necessary to
insert the valve “C”.
Proceed as follows for the electric connection (refer to the
figure 5-11):
1.- disconnect the electric power supply from the appliance;
2.- disconnect the wire from the sensor detail “46” of figures
3-1 or 3-3;
3.- lay a bi-polar electric cable with minimum section of 1,5
mm2, which goes from the appliance tothe storage tank
temperature sensor and connect it to the appliance at
terminals “8” and “9” (SB);
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 5-14 detail “8”).
6.- connect the electric power of the storage tank pump to
“EP” terminals of the water heater.
7.- set the parameters
3012
=
1
and
3041
=
15
.
the water temperature stored inside the storage tank can be
chosen by the user in a range between 40 and 60°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.
5.13.1 - 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.
Figure 5-12 - bypass valve “C” to be included in case of installation with storage tank (respect the
direction of the valve).
020003.01.048
5 B
4
C
1
3
A
2
5 B
4
C
1
3
A
2
020008.01.017
020008.01.021