AERMEC WMT21 Manual De Instrucciones página 52

level, so it is always possible to change the on/off status with the " "
button (if enabled).
"Motor alarm" function
The input lights the " " icon on the display. When the alarm is active,
the electric heater output will be cut off.
"Electric heater alarm" function
When the alarm is activated " " + " " symbols flash on the display and
the electric heater output will be cut off.
The electric heater safety thermostat can be connected to this input.
"Motor rpm control" function
The function is used to monitor the fan rotation by measuring the
motor's rpm. The function can be configured only on input 16. The motor
rpm sensor must be connected to terminal 16. When the fan is on, the
thermostat ensures the motor runs and does not get stuck. It ensures the
signal frequency is between 1 and 255 commutations per second. In the
event of an error, the " " icon appears on the display and the electric
heater output will be disabled, if there is one.
OUTPUT 8
The thermostat can control output 8 to perform a special function. The
special function is configured on parameter C23 and table 6 shows the
functions that can be configured.
Output 8 is not available when the three relays for three speeds motor are
used and when the integration electric heater system is chosen.
Functions that can be configured are:
Fan logic
The output is active when the proportional fan is on, regardless of the
speed.
CONTROL OF 0..10V PROPORTIONAL OUTPUTS
It is possible to connect several actuators to the same 0..10V output,
however it is necessary to make sure the output is not overloaded. Ensure
that the impedance of the group of actuators does not drop below the
minimum impedance the thermostat can control (see "Technical features"
section).
The thermostat constantly controls the 0..10V outputs and if it detects an
overload, it reports the anomaly on the display by turning on the "
in the event of an issue on the heating or cooling 0..10V valve output and
the " " icon in the event of an issue on the 0..10V fan output. If there
is a problem affecting the fan output, the electric heater output is disabled
in the electric heater and integrating electric heater systems.
TEMPERATURE ACQUISITION
This controller acquires both the room temperature and the delivery water
temperature in the fan-coil exchanger with NTC type sensors.
The controller features an internal temperature sensor and also an input
for a remote sensor is available.
The selection between internal or remore sensor is done through parameter
P11 of the "installer configuration".
The supply water temperature in the fan-coil is acquired through a remote
NTC sensor.
The delivery water sensor does not have to be installed in case the system
does not require it. To enable delivery water sensor related functions, see
the "Cut-off temperature function" section.
In case the room or water temperature falls outside the operating range,
the display shows "Or" (out of range). In case the sensor is faulty as an
open or a short circuit, the display shows "EEE" (error): in this situation,
functions which need the temperature are not performed.
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" icons