20
WARNING:
this function is not currently available, so its setting must nec-
essarily be “Without”.
6.5 WATER TANK
For production of domestic hot water, the “TANK DHW” function must be activated.
At the commissioning parameter setting page, by touching “Water tank”, the con-
trol panel will access to the corresponding setting page, where “Water tank” can be
set to “With" or "Without".
Water tank
With
Without
OK
Cancel
After accessing the "Water tank" function, you can specify whether the DHW storage
tank accessory is installed in the system (for more information about the assembly
and use of the DHW storage tank accessory, refer to the installation manual).
Note:
— If the relative function is activated (paragraph "8.1 Activating/deactivating
the memory (On/off memory) p. 32"), the value of these parameters will be
stored in the memory and automatically reset after any possible voltage failure;
— In the case of DHW production, the “ANTI-LEGIONELLA CYCLE” Function must be
activated, see paragraph 4.9 Disinfection p. 12;
— This setting will become valid only when the unit is turned off.
6.6 THERMOSTAT
Thermostat
Air
Air + hot water
Air + hot water
Without
OK
Cancel
After accessing the "Thermostat" function, you can specify which type of manage-
ment to apply to a hypothetical external thermostat (for more information about
the assembly and use of an external thermostat, refer to the installation manual).
At the commissioning parameter setting page, by touching “Thermostat”, the con-
trol panel will access to the corresponding setting page, where it can be set to “Air”,
“Without”, “Air + hot water” and "Air + hot water2".
When it is set to “Air”, “Air + hot water” or "Air + hot water2", the unit will run based
on the mode set by the thermostat; when it is set to “Without” the function will be
deactivated.
Note:
— When “Water tank” is set to “Without”, the “Air + hot water” or "Air + hot water2"
mode is unavailable.
— If the “Floor debug” or “Emergen. mode“ function is active, the external thermo-
stat cannot be used;
— When “Thermostat” is active, “Temp.timer” function will be deactivated au-
tomatically and the unit will run based on the mode set by the thermostat.
Meanwhile, mode setting and On/Off operation by the control panel will be
ineffective;
— When “Thermostat” is set to “Air”, the unit will run based on the setting of the
thermostat;
— If the external thermostat is set for “Cool+hot water”, and the unit is “Off” be-
cause of the thermostat, any requests from the DHW side will be met automat-
ically by the unit, even though the display does not show the “On” status (but
you can still see the values in the parameters menu while the unit is working);
— When “Thermostat” is set to “Air + hot water”, operation priority can be set by
the control panel (see Section "4.3 C hot water p. 10" and "4.4 Heat-
ing + DHW p. 10" for more details.);
— When the “Thermostat” is set to “Air + hot water2”, there are two kinds of re-
sponses for the units. For one, if CN26 receives the “OFF” signal (dry contact,
0Vac), the unit will take the priority to “Hot water”. Once operation conditions
for “Hot water” are ready, the unit will run for “Hot water”. Then, when “Hot wa-
ter” is satisfied, the unit will run on the demands of the thermostat. For the oth-
er, if CN26 has not received the “OFF” signal, the unit will run on the demands
of the thermostat;
A
B
CN 26
— To change the thermostat settings, the unit must be switched Off;
— When it has been activated, “Floor debug”, “Air removal”, and “Emergen.mode”
are not allowed to be activated;
— If the relative function is activated (paragraph "8.1 Activating/deactivating
the memory (On/off memory) p. 32"), the value of these parameters will be
stored in the memory and automatically reset after any possible voltage failure.
Note: when the main unit is under the control of the thermostat, the operation
mode set at the control panel varies with the thermostat, that is, the actual oper-
ation status of the main unit, as shown in the table below. Once the thermostat is
disabled, restart the main unit after check if the operation mode set at the control
panel is expected or not.
