Action Clima CR13 Manual Del Usuario página 21

INTRODUCTION
This digital controller is intended for temperature regulation in environments
equipped with fan-coil heat-cool exchangers. It controls in continuous
proportional fashion the fan speed with P or P + I algorithm in order to
adjust the room temperature in the most suitable way.
OPERATION
The commands available for the user are three pushbuttons and the set-
point knob.
- ' ' On/Off Key
This button is used to turn on and off the controller: when the controller is
turned off the display does not show the temperature, yet some symbols
could still be turned on to show the active outputs.
- ' ' Fan Speed key
This button, when depressed once, makes the display show the current fan
speed: this ! gure will be shown for a few seconds. After that the current
room temperature will be displayed again.
When this button is depressed several times the fan speed is changed
according to the following cycle:
FI 1 FI2
where FI1, FI2 and FI3 mean the three 'FI'xed fan speeds meanwhile AUT
mean the 'AUT'omatic fan speed.
More precisely FI1 means the lowest speed, FI2 the medium speed and
FI3 the fastest. Therefore when the controller is set on one of the three
mentioned speeds, the fan will be activated when necessary at that (! xed)
speed; in this situation the regulation is plain ON/OFF with hysteresis.
Whenever the automatic speed is set instead, the controller performs the
motor speed control in proportional way. (P or P+I), i.e. it will activate the
fan at a speed as much high as the difference between the desired room
temperature against the current one.
Through parameters P30 P31 P32 the user can set the value of the three
! xed speeds.
- '
This button is used to change the display readout mode: when depressed
once it makes the display show the set-point temperature. In case the
controller is con! gured to show the supply pipe water temperature, this
value will be displayed with a further button depression. In case the
controller is con! gured to perform the 'Economy' function, this will be
activated with a further action on this button. If 'Economy' was already
active instead, depressing the button will result in changing the mode
into 'Normal'.
When changing the readout, the controller informs the user about the
parameter shown according to the following table:
tA
Set
TP
ECO
When the button is depressed several times the display readout cycles
across the above mentioned temperatures. After a few inactivity seconds
FI3 AUt
the display readout returns to the room temperature. In case the 'Economy'
mode is activated, the controller always returns showing the 'ECO'
message and the temperature is not visible.
- Knob
The regulation knob allows the user to adjust the desired room temperature
(set-point). The knob has no range printed: whenever it is moved the
display readout jumps to the set-point temperature, thus showing the
value currently setting. Even in this case after a few inactivity seconds the
display readout returns to the room temperature.
DISPLAY
The regulator features a 3-digits LCD display to show temperatures and
settings. All temperatures shown must be intended in Celsius degrees
20
' Menù key
Room (ambient) temperature
Set-point temperature
Supply pipe water temperature
Economy function Active