FAN-COIL 2T
Electronic Controller
Fig. 1
Fig 2.
Fig.3
Fig.4
Fig 5
Safety warnings and operating instructions
• This product should be installed preferably by a qualified professional. Subject to observation
of the above terms, the manufacturer shall assume the liability for the equipment as provided
by legal stipulations. All instructions in this
Installation & Operation manual should be observed when working with the controller.
• Failures due to improper installation, improper use or poor maintenance are voiding
manufacturer liability
• Any attempt to repair voids the responsibility and the obligation to guarantee and replacement
from the manufacturer.
Product description:
FAN-COIL CONTROLER 2T (Fig.1): Fan coils electronic controller suitable for models
equipped with single heat exchanger (2-pipes plants), 3-speeds asynchronous electric motor
connected to the fan, ON/OFF type valve, SUMMER/WINTER manual switch, ventilation
consent on the basis of the water temperature (if necessary).
Operating instructions and legend (Fig. 1):
① – Two steps ON/OFF
OFF mode
ON mode with manual ventilation
② – Manual ventilation switch (minimum, middle, maximum speed)
③ – Green led warning.
Led is switched off: fan coil is working neither in cooling nor heating mode. There are no
anomalies.
Led is permanently switched on: fan coil is working in cooling or heating mode.
Led is slowly blinking: water temperature is not compliant
Led is quickly blinking: temperature probe is faulty or disconnected
⑤ – Control knob for temperature setting from 5 to 35 °C
⑥ –Manual switch mode
SUMMER/COOLING
WINTER/HEATING
Wall mounting instructions:
Install the controller in an easily accessible area suitable for functions setting and efficient for
room temperature detection (at least 1.5 m from the floor). Therefore, avoid:
• direct sunlight exposure
• direct exposure to hot or cold air currents
• placing obstacles which impair correct temperature detection (curtains or furniture);
• the constant presence of water vapor (kitchens, etc.)
• covering or recessing the controller into the wall.
Please, respect the following instructions (Fig.2)
• remove the controller temperature setting knob
• remove the controller closing screw
• pass the cables through the slots on the base and fasten the controller with the reserved
holes
• close the controller back up using the closing screw and insert again the temperature setting
knob
Electrical connections:
All of the operations must be carried out by qualified staff, in accordance with regulations in
force. For any electrical related procedure, refer to the electrical diagrams attached to this
documentation. We also suggest making sure that the characteristics of the electrical network
are suitable for the absorption levels reported in the electrical data table. Before carrying out
any operation on electrical parts, make sure the power supply is disconnected. Check that the
net voltage is compatible with the specifications of the unit (voltage, number of phases,
frequency) shown on the unit rating plate. The supply voltage must not fluctuate by more than
±5% in relation to the rated value. The electrical connections must be set up according to the
electrical diagram attached to the specific unit and with the regulations in force.
Operating and adjustment setting
On the electric circuit of the controller there is one jumper allowing the following setting:
• REMOTE jumper used to specify the position of the air probe on the basis of which the
controller makes the adjustment. The two possibilities are on board probe (factory default
setting) or remote wired probe (Fig. 3).
Adjustment logics:
The thermostat operation (either cooling or heating) takes place with a difference of 0,2°C
from the set point of the controller (Fig. 4). The thermostat switches on the fan and opens the
valve (if any). Ventilation is activated (limited to 2 minutes every 8 minutes) and forced without
a real necessity only with the following setting: cooling mode and remote air probe; this is due
to the fact that in this situation a good air temperature detection is possible only if the air is
periodically moved.
The water consent to ventilation (only if the water probe is connected) is driven by the
activation and deactivation logic reported in figure 5.
Technical data:
