31
Actually it could happen that in some installations, due to the sensor
location (either internal or external) the temperature readout is not
accurate.
By changing the value of this parameter the display readout can be
corrected of the equivalent amount (in the -5.0 .. +5.0°C range), being
this a value which is actually added to the acquired temperature value.
P13 and P14: These two parameters set the temperature limits for the
set-point knob range when in heating mode.
In details P13 is the lower limit, it can be configured in the range
5.0 .. 35.0°C while P14 is the upper limit, whose value can be configured
starting from the actual P13 value until 35.0°C.
The maximum range is then 5 .. 35°C and it can be easily modified
according to the installation needs.
P15 and P16: These two parameters set the temperature limits for the
set-point knob range when in cooling mode according to the same logic as
those in the former step.
In case the heating/cooling settings are modified, the temperature limits for
the set-point knob are automatically modified in turn.
When the ‘neutral zone’ operation is selected, these two parameters will
not be used and only the P13 and P14 values will be taken into account.
P17: This parameter defines an anti-freeze temperature (in °C), that is
a minimum temperature which is maintained in the room even when the
regulator is turned off (with the on-off button).
Regulation according to this temperature will only take place when the
regulator is set in heating mode; the fan speed will be limited to the lowest
one. Setting the value to 0.0 disables the anti-freeze function.
P18: This value defines the entity of a temperature reduction step (in °C)
used to perform the ‘Economy’ function.
The actual set-point is therefore reduced (when in heating mode) or
raised (when in cooling mode) by this step, once the ‘Economy’ function
is made active. When this is set at 0.0 the ‘Economy’ function is actually
disabled.
P19: This parameter defines the hysteresis in °C with which the ON/OFF
outputs are controlled according to the ambient temperature variations.
P20: In case the controller is configured for a neutral zone operation this
parameter determines the relevant amplitude in the range 1.0 .. 11.0°C.
This value has to be intended centered across the temperature set with
the knob.
In case the controller is configured for a different operation this parameter
is not used.
P21: This parameter allows to set a delay time (in seconds) from the
valve opening to the fan turn-on, in order to allow some time for the heat
exchanger to heat-up or cool-down.
P22: This parameter allows to set a delay time (in seconds) from the
valve closing to the fan turn-off, in order to allow some time for the heat
exchanger to dissipate the residual heat.
P23 and P24: These parameters set the thresholds for the automatic
changeover operation: in case this function is not performed these two
parameters are not used.
Parameter P23 is the lower threshold and can be modified in the range
0 .. 24°C, meanwhile P24 is the upper threshold in the range 26 .. 48°C.
P25: This parameter sets the threshold for the cut-off temperature
function: this function is active in heating mode when a supply water
sensor is wired at the proper terminals. In case this function is not desired
the parameter should be set to ‘0’.
P26 and P27: These parameters respectively represent the proportional
band of the adjustment when the thermostat is set either in heating mode
or cooling mode. Fig. 7 graphically shows the effect of the proportional
band on the output.
P28 and P29: these parameters are used to set the integrative time
respectively for regulation in heating mode and in cooling mode. When set
to zero no integral action is performed.
ENGLISHESPAÑOL DEUTSCH ITALIANOFRANÇAIS
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