17
Ecotower
COSMOGAS
5 - OPERATION
Figure 5-5 - ECOTOWER Wiring diagram with one heating/cooling circuit and DHW
5.3.1- Configuration for one heating/
cooling circuit and DHW
After creating the hydraulic system as shown in Figure 5-4 and
the electrical system as shown in Figure 5-5, configure the
appliance as follows:
WARNING !!! The unit can operate without a tank on
the heating/cooling side if the amount of water circulating in
the circuit is at least equal to 10 l / kW of unit power.
For example, in the case of the Ecotower 09 unit (heat output
10 kW), the amount of water circulating in the system must be
at least 10 l / kW = 100 liters.
1.- In the home page of the display, press the “Setting” icon (“H”
of Figure 8-1);
2.- Enter the
“USER”
menù (section 8.2.8) and select “Permission
level”;
3.- Enter the password “87654321” for the Installer level and
press OK;
4.- Go back and enter the “WORKING MODE” menù (section
8.2.9);
5.- Using the green tick, enable the unit to produce domestic hot
water, heating and/or cooling;
6.- Go to second page of the menù and set “Heating / Cooling
switch” to “External signal control”. Switching takes place
only via remote command “12” for cooling or “13” for heating;
7.- Exit the “WORKING MODE”
menù and press to the “WATER
PUMPS” icon (section 8.2.11);
8.- To configure the pump outputs so that the circuits work
according to the status of inputs “12” and “13”, it is necessary:
a.- Select “Working mode of circulation pump P0” and set it
to “ON Costantly”;
b.- Go to the next page and remove the check mark from
“Buffer tank”, disabling;
c.- Put the check mark in “P1 for heating operation” and, if
previously enabled, also enable “P1 for cooling operation”
(pump P1 is not present, but for ECOTOWER work, it must
in any case be enabled);
9.- Exit from “WATER PUMPS” and select “DHW” (section 8.2.3);
10.- Set the DHW setpoint temperature in “Setpoint DHW”
parameter;
11.- Exit this menù and enter to “ZONE 1” menù (section 8.2.1):
a.- If the cooling function is enabled, select “Set temp. for
cooling (fix flow water temperature” and set the setpoint
temperature;
b.- If you want to adjust the heating temperature via outdoor
reset, tick “Heating curve (HC1)” and complete the following
parameters as described in section 8.2.1;
c.- If the “Heating curve (HC1)” has not been selected, set
the appropriate set point temperature on the “Set temp. for
heating (fix flow water temperature)”;
12.- Exit this menù and select “BACK-UP”;
13.- Tick on “Backup heating sources for sanitary hot water” so
that the heat pump can call electrical heater “20” if it is unable to
bring the domestic hot water tank to the required temperature
within a certain number of minutes;
14.- Select “Priority for backup heating sources (HWTBH)” and
set it to “Lower than AH” (in this way priority is given to electrical
heater “20” and then to electrical heater “33” which is inside
the heat pump);
15.- In the same way and with the same criterion, you can
choose the integration of alternative heating sources, setting
the related parameters.
After this configuration, the unit is able to:
- Domestic hot water production in priority over heating / cooling;
- Be called in heating by closing contact “13”;
- Be called in cooling by closing contact “12”;
- Call the integrative electrical heater “20” (Figure 5-3) or the
internal electrical heater “33” (Figure 5-3) whenever the
appliance fails to reach the domestic hot water and / or heating
set point within a certain period of time.