COSMOGAS ECOTWIN, Инструкция по установке, эксплуатации и обслуживанию, Страница: 17 / 88

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ecotwin
COSMOGAS
5 - OPERATION
Figure 5-5 - 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 Ecotwin 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 ( detail “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
“17” for cooling or “18” for heating;
7.- Exit the “WORKING MODE” menù and press to the “WATER PUMPS”
icon;
8.- To configure the pump outputs so that the circuits work according to the
status of inputs “17” and “18”, 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 ECOTWIN work, it must in any case be enabled);
9.- Exit from “WATER PUMPS” and select “DHW”;
10.- Set the DHW setpoint temperature in “Setpoint DHW” parameter;
11.- Exit this menù and enter to “ZONE 1” menù:
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 resistance “9” 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 resistance “9” and then to
resistance “35” 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 “18”;
- Be called in cooling by closing contact “17”;
- Call the integrative resistance “9” (Figure 5-4) or the internal resistance
“35” (Figure 6-22) whenever the appliance fails to reach the domestic hot
water and / or heating set point within a certain period of time.