Carrier 42NS15 Manual De Instalación Y De Uso página 27

Controls "A" - "B" - "C" - "D"
"Night" and "Darkening" mode
If the buttons and the knob are not pressed or used for 10
seconds, the light is dimmed by the LEDs to reduce the
disturbing light. This function is called "Night" mode. By
a special selection, the LEDs light can be fully darkened
("Darkening" mode).
The "Darkening" mode can be selected by setting the fan speed
to its maximum value and keeping the selection button of fan
speed pressed for 5 seconds. 4 lashes of the red LED indicate
the fan maximum speed.
With the same operation it is possible to return to "Night" mode.
In this case, the same LED is lashing 3 times.
Booster heating (B and D controls)
This function allows the water soilenoid valve and the electric
heaters to work simultaneously. This function can be activated
by means of dip-switch (no. 5) – see dip-switch coniguration
section. To avoid over heating due to simultaneous operation of
water and heating elements, the temperature of the incoming
water of the coil is adjusted by a special sensor (optional) that
must be positioned on the inlet pipe. If the function is active
but the sensor is not connected, the control enters the alarm
mode, the red led lashes and all the user devices are switched
of.
Sensor installation
Open the control by loosening the screw 27 (see ig. 34).
Connect the sensor on the connector side of the electronic
board to connector (see ig. 34b - rif. A). Place the sensor on
the incoming water pipe using the clips and the nylon strips
supplied (see ig. 34 c). Complete by insulating the pipe with
the insulating tape supplied.
Use
Button operation:
POWER this button is used to turn the control on and of.
When it is OFF, all functions are disconnected but the
control is still powered at 230V.
If the frost protection function is selected by the
special microswitch, this function is activated even if
the control is off.
MODE this button is used to manually switch from cooling to
heating mode and vice versa. The automatic operating
mode is also available: the heating or cooling mode
are automatically selected by the microprocessor
depending on the external temperature (only for B and
D control).
FAN this button is used to select the fan speed manually
(low, medium and high speed).
Keep on pressing this button to select the automatic
fan speed selection, which is controlled by the
microprocessor. If this operating mode is selected, the
yellow LED is on. Moreover, by using the same button
it is possible to select the Energy Saving function
where the room temperature required is raised by 4°C
in cooling mode and reduced by 4°C in heating mode.
The green LED turns on when the Energy Saving mode
is active.
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).
"Dip-switch" function (JUMPER)
A - B - C - D Controls
Dip-switch 1
In open contact position, it allows to activate the frost protection
function ( ).
Dip-switch 2
In open contact position, it permits the fan operation at the
selected speed even if the set point temperature is satisied.
Dip-switch 3
In open contact position, it restricts the range of the
temperature selection knob according to the following limits:
Cooling: minimum selectable temperature: 23°C.
Heating:
maximum selectable temperature: 21°C.
Dip-switch 4
In open contact position, it permits to activate the fan
periodically even if the set point temperature is satisied (air
sampling).
Dip-switch 5 (B and D Controls)
In open contact position, it permits to activate the Booster
Heating function (additional heating).
Dip-switches 6, 7 and 8 (C and D Controls)
The position of these dip-switches regulates the motor pilot
voltage; a higher voltage indicates a higher fan speed. The
selection is made according to the table below.
"Dip-switch" coniguration (JUMPER)
A - B - C - D Controls
Dip-switch 1
Closed Frost protection ( ) disabled.
Open Frost protection ( ) enabled.
Dip-switch 2
Closed Ventilation controlled by thermostat.
Open Continuous ventilation.
Dip-switch 3
Closed Temperature block disabled.
Open Temperature block enabled.
Dip-switch 4
Closed "Air sampling" disabled.
Open "Air sampling" enabled.
B and D Controls
Dip-switch 4
Closed Booster Heating disabled.
Open Booster Heating enabled.
C and D Controls
Dip-switch
6 7
Closed Closed Closed
Closed Closed Open
Closed Open Closed
Closed Open Open
Open Closed Closed
Open Closed Open
Open Open Closed
Open Open Open
NOTE: Factory setting is with all dip-switches in close position.
Motor speed
8 LOW MID
2V 6V
2V 4V
6V 8V
2V 3V
8V 9V
5V 6V
4V 6V
3V 6V
42N_S 42N_E
HIGH
10V
6V
10V
4V
10V
7V
8V
9V
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