Frost Protection; Energy Saving; Light Indicators - Carrier Type A Electronic Control Manuel D'installation

Type A Electronic Control
Control
means of a sensor if water temperature is below 40°C, and during
cooling if water temperature is above 18°C.
These two functions allow improved comfort levels during winter by
avoiding undesired fan operation and during summer by turning the
fan coils On and OFF automatically in relation to the water tempe-
rature.
Frost - protection
This function keeps the temperature from dropping below 7°C in
rooms not used for long periods of time.
When this temperature is reached, the control activates the valve
and puts the fan on high speed.
The frost protection function can be activated through the associ-
ated micro-switch (see dip switch configuration); if enabled, this
function activates even when the control is in the OFF position.

Energy saving

This function is especially useful when air conditioning at night or
in rooms where the user is likely to be absent for a longer period of
time.
In this case, pushing button
by 4°C and lowers it during heating by 4°C.
Enabling this function (yellow LED On) cuts out other displays.
During energy saving, even the brightness of the yellow LED is
dimmed.
Seasonal changeover
Manual
Selection of heating/cooling is done manually by pushing the button
on the control.
Centralised
Centralised seasonal changeover can be done in two ways:
- by a switch located on the central control panel that allows hea-
ting/cooling mode changeover;
- by a temperature sensor (Accessory) located in contact with the
entering water pipe.
In this last mode, fan coil operation is driven by the control, in coo-
ling or heating, depending on the temperature read by the sensor.
Switch and sensor operate on 230V power supply, so both must be
adequately insulated.
If the seasonal manual changeover button is pushed while the cen-
tralised changeover mode is activated, the corresponding LED will
briefly flash while maintaining the activated mode.
In any case, centralised changeover takes priority over local chan-
geover.
External contact
The control has an input that can be used as window contact or
presence detection.
When such a signal is activated (presence of line voltage on the
terminal block contact) the control is set to OFF mode.
As a consequence, all outputs (fan, valves etc.) are disconnected,
and only the frost protection is active, if switched On by the ap-
propriate dip-switch.
raises the temperature during cooling
Use:
ON/OFF/fan speed selector
OFF
In this position the control is OFF and all functions are disa-
bled.
If the frost protection function is selected by the dip-switch,
this is activated even if the control is in OFF position.
With selector in this position, the fan operates at low speed.
With selector in this position, the fan operates at medium
speed.
With selector in this position, the fan operates at high
speed.
AUTO The control maintains the selected temperature, acting
automatically on the fan speed.
Temperature selector
Its purpose is to maintain the temperature at the desired level.The
reference value at the centre of the range is 20°C .
By turning the knob towards the symbol ( – ) the temperature is
reduced from the original setting (minimum value is 10°C).
By turning the knob towards the symbol ( + ), the temperature is
raised from the original setting (maximum value is 30°C).
Seasonal changeover button
This button allows selecting the operating mode, cooling, heating.
If the sensor for centralised changeover is connected, this button is
disconnected.
Energy saving button
This button activates the energy saving function which modifies
room temperature as follows: in heating, the selected temperature
is reduced by 4°C; in cooling, the selected temperature is raised by
4°C.

Light indicators

Blue LED
ON Indicates that the control is in cooling mode
( ).
Flashing Indicates that the control is in frost protection
mode ( ).
Red LED
ON Indicates that the control is in heating mode
( ).
Indicates the presence of a fault (sensor failed
Flashing
or not connected).
Yellow LED ( )
ON Indicates that the control is in energy saving
mode .
Indicates (if connected) that the external contact
Flashing
is open.
Red / Blue LED
Flashing Indicates that the control is in "Autotest" mode.
E N G L I S H
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