IT EN FR DE ES
16 IFCZ-ACTALJ 1807- 4696520_04
The FCZ-ACT fan coils are supplied ready to operate in the standard
configuration but they allow the installer to adapt them to the specific needs
of the system with dedicated accessories and to customise the functions by
adjusting the internal Dip-Switches (see DIP-SWITCH SETTINGS).
Response to the commands is immediate except under special
circumstances.
System types
The FCZ-ACT fan coils have been designed for systems with 2 pipes, in the
following versions:
- without valve;
- with two-way valve (water probe downstream of the valve);
- with three-way valve (water probe upstream of the valve);
Ventilation
The three-speed ventilation can be controlled either manually with the
selector in V1, V2 and V3 positions (the fan is used with cycles of coming on
and off at the selected speed), or automatically with the selector in AUTO
position (the fan speed is controlled by the thermostat according to the
room temperature).
For systems with valve and Water Probe installation upstream of the valve
there may be a delay (delayed ventilation up to 2’40” max) between the valve
start-up and the fan activation (exchanger pre-heating).
Season change
The thermostat changes season automatically.
The season change takes place depending on the temperature of the water
in the system.
According to how the Dip switches are set, there may be two season change
modes on the water side:
- only with minimum/maximum temperature check;
- with minimum/maximum temperature check and battery pre-heating
(delayed ventilation up to 2’40” max).
Only for special systems with downstream water probe or a two-way valve, this
season change takes place on the air side, by operating the temperature selector;
with this setting the fan coil in existing systems can be used with a two-way valve,
but it is not recommended as it reduces the electronic thermostat simplicity
of use (viewing the Heat/Cool functioning status through the LED is altered,
depending on the selected temperature and on the air temperature in the room).
Water temperature checks
The thermostat enables the ventilation only if the temperature of the water is
suitable with the Heat or Cool mode.
The enabling thresholds (35°C or 39°C for heating and 17°C or 22°C for
cooling) can be set through the Dip-Switches.
The control panel indicates when the water temperature is not adequate for
the functioning mode set, through the alternate flashing of the fuchsia LED C
with red or blue depending on the active mode.
If the three-way valve has been installed, the SW water probe (standard) must be
replaced with the SW3 accessory, whose bulb must be positioned on the delivery
pipe upstream of the valve.
Valve control
The valve can be controlled in two modes:
- optimised: uses the fan coil for Heat capacity to radiate heat even when
the ventilation is off and the fan coil for Cool capacity to have continuous
ventilation keeping the control of the room temperature through the valve;
- normal: the valve is opened or closed when the fan is turned on or off.
Emergency Mode
If there is a functioning fault in the SA ambient probe, the thermostat enters
the Emergency mode, which is indicated when the yellow LED (D) flashes. In
this condition the thermostat operates as follows:
- with selector (A) in OFF position, the water valve is closed and the fan turns
off.
- with selector (A) in position AUTO, V1, V2 and V3 the water valve is always
open and the fan goes through the cycles of coming on and off; in this
condition the power coming from the terminal is manually controlled
through the selector (B): turning it to the right increases the duration of the
On cycle; turning it to the left decreases the duration.
FUNCTIONING CHARACTERISTICS
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