63
Ecotower
COSMOGAS
8 - USE
8.2.10.1 - Integrative electrical heater
(6kW)
The unit is equipped with a 6 kW internal electrical heater
(item “33” in Figure 5-3), divided into two of 3 kW:
- HBH (KM3), dedicated only to heating;
- AH (KM1), dedicated to both heating and DHW.
The intervention priority can be set in the “Priority alternative
sources for heating” parameter (section 8.2.10):
- if “Lower than AH” option is selected, priority is given to
heater AH (KM1);
- if “
Higher than AH” option is selected, priority is given to
heater
HBH (KM3).
The two electrical heaters are started if:
a.- the power of the heat pump, in heating, is not sufficient,
one of the two heaters is started in accordance with what
has been set in the relative parameters;
b.- and the heating water temperature is lower than the value
set in the digital thermostat (item “4” in Figure 3-1).
In this way the digital thermostat works as a limit thermostat,
to prevent the heat pump from starting the heating elements
when not desired.
The intervention speed of the electrical heaters can be set
in the parameter “Backup source start accumulating value
(HBH)“(section 8.2.10): the lower the value, the sooner the
heater is called.
8.2.10.2 - Electrical heater for DHW (1,5kW)
The appliance is equipped with a 1.5 kW internal electrical
heater, called HWTBH (KM2), (item “20” in Figure 5-3) placed
in the buffer. The intervention priority of this electrical heater
can be set in the parameter “Priority for backup heating
sources (HWTBH)” (section 8.2.10):
- if “Lower than AH” option is selected, priority is given to
heater AH (KM1) (section 8.2.10.1);
- if “
Higher than AH” option is selected, priority is given to
heater for
DHW (KM2) (1,5kW).
This electrical heater is started if:
a.- the DHW setpoint is over 55 ° C or if the heat pump
was unable to heat the water in the time determined by
the parameter “
Water temperature rise reading interval
(HWTBH)” (section 8.2.10);
b.- and the value of the domestic water temperature is lower
than the value set in the mechanical thermostat (item “11”
in Figure 4-1).
