Unical CONTROLLER INTERFACE User manual

Controller interface
60 - 90 - 120 - 150

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INDEX
1USER - CONTROLLER INTERFACE ......................................................................................................................................... 4
1.1 MENU STRUCTURE DIAGRAM ................................................................................................................................................ 4
1.1.1 ANALOG INPUT MENU ................................................................................................................................................... 4
1.2 PARAMETERS CATEGORIES .................................................................................................................................................... 5
1.3 SETPOINT ADJUSTABLE BY THE USER ..................................................................................................................................... 5
1.4 DISPLAY .................................................................................................................................................................................. 5
1.5 LED ......................................................................................................................................................................................... 5
1.6 DYNAMIC SET-POINT ADJUSTMENT ....................................................................................................................................... 5
1.7 SET-POINT ADJUSTMENT FROM 0-10V INPUT........................................................................................................................ 6
1.8 HYDRAULIC PUMP OPERATION .............................................................................................................................................. 7
1.8.1 OPERATION BY MEAN OF THERMOREGULATOR (Default)............................................................................................. 7
1.8.2 OPERATION BY THERMOREGULATOR WITH PERIODIC ACTIVATION.............................................................................. 8
1.8.3 CONTINUOUS OPERATION ............................................................................................................................................. 8
1.8.4 PROPORTIONAL ADJUSTMENT OF THE PUMP ............................................................................................................... 8
1.9 REMOTE ON/OFF AND SUMMER-WINTER MODE SELECTION ................................................................................................ 9
1.10 REMOTABLE WATER TEMPERATURE SENSOR ........................................................................................................................ 9
1.11 ACTIVATION OF SANITARY HOT WATER PRODUCTION........................................................................................................... 9
1.11.1 MEMORY OF THE SENSOR IN HEATING MODE............................................................................................................. 10
1.11.2 CALL OF DOMESTIC HOT WATER PRODUCTION FROM DIGITAL INPUT ....................................................................... 11
1.12 HEATING MODE ON SANITARY ACCUMULATION ................................................................................................................. 13
1.13 AUXILIARY ELECTRIC HEATER OF THE PLANT ........................................................................................................................ 13
1.13.1 AUXILIARY ELECTRIC HEATER OF THE PLANT IN DEFROST CYCLE................................................................................. 14
1.14 ELECTRIC HEATER OF SANITARY WATER PRODUCTION........................................................................................................ 14
1.15 A SINGLE INTEGRATION HEATER FOR PLANT /DHW PRODUCTION...................................................................................... 14
1.16 SELECTION MODE OF AUXILIRY ELECTRIC HEATERS ............................................................................................................. 14
1.17 ACTIVATION OF AUXILIARY ELECTRIC HEATER AND BOILER DURING THE JOINT/IN SUBSTITUTION OPERATION TO THE
COMPRESSOR................................................................................................................................................................................... 14
1.17.1 BOILER MANAGEMENT ................................................................................................................................................ 19
1.18 INDICATION ON SUMMER/WINTER OPERATION.................................................................................................................. 20
1.19 DEFROSTING CYCLE .............................................................................................................................................................. 20
1.20 COMPRESSOR CRANCKASE HEATER ..................................................................................................................................... 20
1.21 WATER SIDE DIVERTING VALVE (PRESENT ONLY ON V2+ SERIES)......................................................................................... 20
1.22 PLANT SECONDARY PUMP.................................................................................................................................................... 20
1.23 DOUBLE SET-POINT (WITHOUT REMOTE CONTROL TOUCH SCREEN) ................................................................................................ 20
1.23.1 HEAT PUMP SETTING ................................................................................................................................................... 20
1.23.2 NOTES FOR INSTALLATION ........................................................................................................................................... 21
1.23.3 ADJUASTABLE SET-POINT ............................................................................................................................................. 21
1.23.4 COMMUTATION ........................................................................................................................................................... 21
1.23.5 WIRING DIAGRAMS ...................................................................................................................................................... 21

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1.24 AVAILABLE FUNCTIONS WITH HI-T ACCESSORY.................................................................................................................... 23
1.24.1 SCREED COAT FUNCTION.............................................................................................................................................. 23
1.24.2 DISINFECTION FUNCTION(ANTI-LEGIONELLA).............................................................................................................. 23
1.24.3 DOUBLE SETPOINT FUNCTION AND DEHUMIDIFICATIONE WITH TOUCH SCREEN ...................................................... 23
1.24.4 PLANT SECONDARY PUMP............................................................................................................................................ 25
1.25 TABLES OF CONFIGURATIONS ALLOWED TO USER AND INSTALLER ..................................................................................... 25
1.29 ALARMS................................................................................................................................................................................ 29
1.26.1 WATER FLOW SWITCH E06........................................................................................................................................... 29
1.26.2 HIGH TEMPERATURE E18 ............................................................................................................................................. 29
1.26.3 ANTI-FREEZING E05...................................................................................................................................................... 29
1.26.4 SENSORS ALARM E61÷E69............................................................................................................................................ 29
1.26.5 TIMEOUT INVERTER E801............................................................................................................................................. 29
1.26.6 INVERTER E851÷E891................................................................................................................................................... 29
1.26.7 REMOTE ON/OFF E00................................................................................................................................................... 30
1.26.8 HIGH PRESSURE E01 ..................................................................................................................................................... 30
1.26.9 HIGH PRESSURE FLOW SWITCH (IN SERIES WITH THE COMPRESSOR OUTLET PROBE) E64......................................... 30
1.26.10 LOW PRESSURE E02.................................................................................................................................................. 30
1.26.11 LOW TEMPERATURE DHW PREPARER E07............................................................................................................... 30
1.27 POWER FAILURE ................................................................................................................................................................... 30
1.27.1 USER BLOCK ALLARMS TABLE....................................................................................................................................... 30

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1USER - CONTROLLER INTERFACE
It is used to select the operating mode, and to reset the manual resetting alarms. The operating mode changes as
per the sequence below each time you press the Mode button:
off cool heat off
If the sanitary mode is enabled, the sequence is as follows:
off cool cool+sanheat heat+sanoff
During the parameters’ setting, this button can be used to revert BACK to the previous level.
It allows you to enter into the setting menu parameters and to select the cool/summer, heat/winter and sanitary
water set point value.
UP button: In the setting mode, this button allows you to move up to a higher menu or to increase the value of a
parameter when you are in the “edit” mode.
DOWN button: In the setting mode, this button allows you to shift to a lower menu or to decrease the value of a
parameter when you are in the “edit” mode.
1.1 MENU STRUCTURE DIAGRAM
Level 0 (U) = always appearing
Level 1 (M) = it appears if you enter the maintainer (H80) or manufacturer password
Level 2 (C) = it appears if you enter the manufacturer password
Level 3 (A) = it appears only via Modbus
1.1.1 ANALOG INPUT MENU
By entering the maintainer password in the menu of analog inputs "tP", at the level 1 of the menu structure diagram of the unit
control board, you can read the values of the current probes:
t01: water inlet temperature (°C);
t02: water outlet temperature (°C);
t03: compressor inlet temperature (°C);
t04: compressor discharge temperature (°C);
t05: high pressure (bar);

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t06: low pressure (bar);
t07: outdoor air temperature (°C);
t09: sanitary hot water temperature (°C) (if the hot water production is enabled).
1.2 PARAMETERS CATEGORIES
DESCRIPTION
IDENTIFICATION CODE OF THE GROUP
PARAMETER INDEX
Configuration
CnF
H-
Compressor
CP
C-
Fan motor
FAn
F-
alarms
ALL
A-
Regulation (setting)
Re
b-
Pump
PUP
P-
Electric heaters
Fro
r-
Defrost
dFr
d-
Electronic valve
EEu
U-
Offset
OFF
o-
Mixing valve
rAd
i-
Solar
SUn
S-
Preparer DHW
AcS
Ac-
Max. Hz
LbH
L-
1.3 SETPOINT ADJUSTABLE BY THE USER
Setpoint type
Setpoint (summer/winter)
Summer default (range)
Winter default (range)
First setpoint (°C)
Coo/Hea
7 (5÷18)
45 (35÷55)
Second setpoint (°C)
Co2/He2
18 (7÷23)
35 (25÷45)
Sanitary Setpoint (°C)
San
48 (25÷55)
The functionality of the second setpoint can be used only when you purchase the proper optional kit.
1.4 DISPLAY
In Normal view displays the outlet water temperature reported to tenths of degrees, or the alarm code if at least an alarm is
active. In case of multiple alarms activation, it will display the first alarm, while the second appears when the first is reset. Into the
menu mode, the display depends on the current position where you are.
1.5 LED
Compressor LED
ON if the compressor is running
OFF if the compressor is off
FLASHING if timings are in progress waiting for compressor’s start up
Sanitary water LED
ON if sanitary mode is active
OFF if the sanitary mode is not active
FLASHING if sanitary production in progress (sanitary valve is active)
Defrosting LED
ON in defrost operating mode
OFF if defrosting mode is disabled or completed
FLASHING if defrosting cycle interval’s time is in progress.
Antfreeze electric heater LED
The LED is ON if the antifreeze electric heater is active.
Water pump LED
The LED is ON if the water pump is running.
Alarm LED
The LED is ON if an alarm is activated.
Heat LED
The LED is ON if the unit is in the heating mode operation.
Cool LED
LED is ON if the unit is in the cooling mode operation.
1.6 DYNAMIC SET-POINT ADJUSTMENT
The controller can change the set-point by adding a value depending on the outdoor air temperature sensor. In this case, you need
to change the values of the parameters from b08 to b14 following the indications below (the settings should be done by the
installer):
Prameters of the controller PAr->rE->
• b08 = dynamic set-point, enabled = 1/ unabled = 0 (must be disabled in the case of the use of climatic compensation from the
optional remote keyboard CRH).

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•b09 = offset max in cooling mode operation.
• b10 = offset max in heating mode operation.
• b11 = Outdoor temperature setting in cooling mode.
• b12 = Outdoor temperature setting in heating mode.
• b13 = Temperature difference in cooling mode operation.
• b14 = Temperature difference in heating mode operation.
Curve of the set-point variation as a function of the outside temperature:
1.7 SET-POINT ADJUSTMENT FROM 0-10V INPUT
Another type of setting that allows to change the set-point by adding (or subtracting) a value in function of the 0-10V analogue
input (if enabled). To enable the function, you must set the H21 parameter to be 40, and change the values of the parameter
b15 (range 0-10), taking into account that if b20=0 input of 0-10V, if b20=1 ratiometric input type:
-b20=0 if this input is at 0 volts you will have the actual set point: set point (Coo/Hea) - b15/2.
-b20=0 if the input is at 5 volts the set point will be the set of (Coo/Hea) mode.
-b20=0 if the input is 10 volts you will have the actual set point: set point (Coo/Hea) + b15/2.
Cooling
Heating

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-b20=1 con ingresso a 0% si avrà come set-point attuale: set impostato (Coo/Hea) –b15/2
-b20=1 con ingresso a 50% il set-point sarà quello impostato (Coo/Hea)
-b20=1 con ingresso a 100% si avrà come set-point attuale: set impostato (Coo/Hea) + b15/2
The signal must be applied to the terminals 0-10V+ and 0-10V- (see the wiring diagrams).
Note: In "cooling" mode, considering that the set-point by default is set to be 7°C, the parameter (b15) should not assume any
value greater than or equal to 6 in order to prevent that the new set-point set from 0-10V input to take values below the threshold
of the antifreeze operation which is 4°C.
1.8 HYDRAULIC PUMP OPERATION
The hydraulic pump can be set according to one of the three following types of operation:
-Operation by thermoregulator (default)
-Operation by thermoregulator with periodic activation
-Continuous operation
The pump will switch off immediately:
- with the activation of the flow switch locking alarm such as flow switch alarm with manual reset
- in the case of stand-by mode or when turning off the unit using digital input, the pump (if is running) will always go off with a
delay of P02.
The pump is always running if the antifreeze heaters are on.
The pump can be configured with P03 to operate independently of the compressor or under call.
Contrarily, the pump keeps always running if the antifreeze heaters are on or when the hydraulic pump operates in antifreeze
mode. The operation in antifreeze mode will start if the water setting temperature decreases below P04 °C (default value 5°C),
and it will be disabled if the water setting temperature increases above P04+P05 °C (the default value of P05 is 2,0°C).
The pump speed adjustment is proportional to the variation of the difference of water temperatures [°C] (see Paragraph 1.8.4).
1.8.1 OPERATION BY MEAN OF THERMOREGULATOR (Default)
During this operating mode (P03=1, default), the thermoregulator actuates the pump; after a time delay of P01 seconds from
startup of the pump, the compressor also will turn on. However, during the power off status, the pump turns off with a delay time
of P02 seconds after turning off status with thermoregulator call (the turning off status is corresponding to the off status of the
compressor).
In the case of activation of the flow switch alarms with automatic reset, the pump remais still in operation even if the compressor
is stopped.
If you enable the operation of the unit from "on-off" digital input (see Paragraph 1.9) the circulating pump will be activated
immediately for a duration of 2 minutes regardless of the direct on-board thermoregulation of the unit (the activation of water
recirculation in the plant leads to a correct activation of the thermoregulation).

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1.8.2 OPERATION BY THERMOREGULATOR WITH PERIODIC ACTIVATION
The function is disabled if P17= 0 (default). If the pump is set to operate by thermoregulator call (P03 = 1, default), it will be
activated periodically for a time period defined by the parameter P17 (in seconds) after a counting time set by the parameter P16
(in minutes), activated when the pump is turned off for satisfied thermoregulation.
In the case of the activation of the flow switch alarm with automatic reset the pump is still operating even if the compressor is off.
The periodic function is also interrupted in the case of the intervention of the antifreeze thermoregulator constraining the
operation of the pump.
1.8.3 CONTINUOUS OPERATION
In this operating mode (enabled if P03=0), the pump is always runing. It turns off only when the unit is in OFF status and when you
switch between cool/heat and heat / cool modes.
1.8.4 PROPORTIONAL ADJUSTMENT OF THE PUMP
The pump speed can change as a function of the temperature difference between the water inlet and the water outlet of the heat
exchanger, according to the diagram shown below, where:
P07: maximum speed of the modulating pump (%)
P08: minimum speed of the modulating pump (%)
P09: set Delta T inlet/outlet water of the modulating pump (°C)
P10: Delta modulating pump (°C)

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In sanitary hot water production mode, the pump will operate at the maximum speed.
1.9 REMOTE ON/OFF AND SUMMER-WINTER MODE SELECTION
The terminal block has two digital inputs to control the unit via an external consent.
SW-SW: Summer/winter switching mode input via remote control. To enable this feature, set the parameter H76=1.
The parameter is protected by maintainer password (could be changed by the installer).
At Open Contact, the unit will be set in heating mode and at Closed Contact, it will be set in cooling mode.
onoff-onoff: Remote on-off input. The feature is already enabled by default. Remove the bridge connection in the terminal block
to put the unit in stand-by mode (in such a state the code ''E00'' will appear on the display of the unit).
When the contact is closed, the unit quits the standby mode and the circulator will turn on for 2 minutes.
If the sanitary operating mode is activated and the parameter H10 = 1,, the on-off remote function will switch off the
machine provided the sanitary set had not yet been reached (in such a state the word ''SAN'' will appear on the
display of the appliance).
If the domestic hot water operating mode is enabled and the parameter H10 is set to be 2, the remote on-off
function stops the DHW production and the heating / cooling operation for the plant side.
1.10 REMOTABLE WATER TEMPERATURE SENSOR
In some plant solutions (eg: heat pump in parallel to the boiler in the same hydronic circuit and diverter valve of exclusion) may be
necessary to remote the temperature sensor of the plant in order that the on board controller can process correctly the
management of the plant.
To adjust the remote-sensor, please set the parameters as H19=41, H44=0 and H11=8 and then connect the remote-sensor to SE-
SE terminals, otherwise you should set H20=41, H45=0 and H11=9 if you want to use SAN-SAN terminals).
WARNING: if you do not use the remote sensor, please keep H11 = 2 (otherwise the operation of the machine will compromise).
1.11 ACTIVATION OF SANITARY HOT WATER PRODUCTION
To activate the hot sanitary water function, be sure to install a temperature sensor inside the tank and to connect it to the SAN-
SAN terminals (enabled as analog input). Once the temperature sensor is installed and connected, it is necessary to set the
parameter H10 = 1 or 2, and to set the parameter H20 = 6 to enable the analog input for the sensor.To set these parameters,
please enter the maintainer password and then enter the PRG->PSS->PAr->Cnf->H10/H20 parameters (the configuration could be
done by the installer).
If the hot sanitary water temperature is below the set point value (set at 48°C by default and adjustable by entering the PRG-> Set-
>SAN menu), the unit activates the sanitary valve and the compressor is set at the maximum frequency starting the modulation at
one degree before the set value and it stops at one degree after the set value. Once reached the set point value, the valve
switches to the stand-by mode and the compressor works normally.
When using a 3-way valve to switch-over with 3 contacts for power supply, it must be connected to the terminals NO1,N,NC1.
Otherwise, in the case of using a 3-way valve for switching-over with 2 contacts for power supply (with spring return), it must be
connected to the terminals NO1 and N.
Closed contact NO1 means that the valve is energized and diverts the water flow to the sanitary water tank.
Open contact NO1 means that the valve is de-energized and diverts the water flow to users.
While shifting from domestic water to sanitary water, the operating sensor changes from “outlet water sensor” to “sanitary tank
sensor”. While shifting from the winter operating mode to the sanitary operating mode, the compressor does not switch off, and
reaches the maximum established frequency that to be controlled; on the other hand, while shifting from the summer operating
mode to the sanitary operating mode, the compressor is switched off to wait for the safety timing.

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1.11.1MEMORY OF THE SENSOR IN HEATING MODE
In the case of commutation from water users to the sanitary water, the temperature sensor changes from a "water outlet
temperature sensor" to a "water tank temperature sensor". For such reason, in heating mode, the last value read by the sensor
will be memorised before changing to sanitary mode.
When the sanitary thermoregulation is reached, the reference temperature on the plant side will take the value which is
previously memorised.

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The memory function will be interrupted:
-When the temperature detected by the sensor becomes lower than the memorised value;
-Or after a duration equal to b06 seconds (default 45 seconds).
1.11.2CALL OF DOMESTIC HOT WATER PRODUCTION FROM DIGITAL INPUT
Differently to the use of the temperature probe, the activation of the sanitary hot water function may be by closing the digital
input (SAN-SAN terminals enabled as digital input) of the minichiller. This function is recommended in the case of use of two or
more minichillers in cascade linked trougth a hydronic connection to the same accumulation tank of sanitary hot water; in this way
the activation of sanitary hot water function will be selected through the probe of the accumulation tank connected to the first
minichiller, while the other minichillers will be automatically enabled by digital consent. Only for the units with the calling of
sanitary hot water production by digital input, as well as enabling the sanitary function with H10=1, it must therefore enable the
digital input by setting the parameters H20=0, H45=28, H54=128. For each minichiller (except the last one of the cascade), you
must use a relay (not supplied), controlled by the output 230VAC NO1 and Nsituated on the terminal block, that can enable
through its free contacts COM and NO the SAN-SAN digital input of the next chiller in the cascade. Please refer to the wiring
diagram below for such configuration.

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NOTE: turning off the unit remotely (onoff-onoff terminals), or by the on board keyboard, or by a remote keyboard does not affect
the sanitary operating mode. Once the H10 parameter is set to be 1, the unit switches to sanitary priority as soon as powered. The
on board display shows the temperature measured by the sensor placed inside the sanitary water tank. Once the sanitary cycle is
completed, the display returns to show the outlet water sensor temperature.
If the remote ON-OFF digital input (onoff onoff terminals) is opened, with the enabling of sanitary hot water production (H10=1
and H20=6), the display on the unit shows the the word "SAN". Once the sanitary cycle is concluded, the display returns to show
the code "E00" indicanting that the remote ON-OFF contact is opened.
The defrost during winter operation mode is always performed on the user side, never on the sanitary water tank.

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1.12 HEATING MODE ON SANITARY ACCUMULATION
If the parameter H83=1, the appliance exploits the accumulation tank for sanitary hot water also to heat the plant side. In these
conditions, the relay which controls the sanitary valve will be also energized during heating operation and not only in sanitary
mode. During the defrost periode and in cooling mode the valve will be de-energized. When H83=1, the sanitary auxiliary electric
heater can be enabled also to act as a plant auxiliary electric heater: to this purpose you should set r10=1 and r15=2 (for further
settings of the parameter r15 please see Paragraph 1.14); also no digital output has to be set for the auxiliary electric heater for
the plant.
1.13 AUXILIARY ELECTRIC HEATER OF THE PLANT
The output of the auxiliary electric heater of the plant is active only when the parameter H58 is set to 22 (AEH-AEHN 230V output,
already set as default) or H61=22 (NO1-N 230V output, not set as default) (for other outputs that can be used in the terminal block
and for their configurations please see the Paragraph 1.25). The heaters operates when the parameter r10 is set to be 1. The
parameter r24 must also set to 1 or 3 (please refer to the explanation of the r24 parameter settings in the Paragraph 1.17). When
the minichiller unit is operating normally, if the regulation temperature remains below the water setpoint minus r11 (°C) and the
unit lockouts because of an alarm intervention, the heater will thus be turned on. It will turn off after the unit gets out from the
alarm condition. The auxiliary electric heater can also be turned on when the heat pump is not in alarm condition: according to the
type of the unit’s operation, if the unit is in joint or in substitution areas (as seeing in the Paragraph 1.17), if the hot water
production persists beyond the time of intervention set by the parameter r12 (minutes) and if the detected water temperature
remains always below the setpoint minus r11 (°C). In these conditions the auxiliary electric heater turns on. It turns off when the
unit reaches the set point (taking into account also of any offset set by the parameters r29 or r30, see the paragraph 1.17).

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1.13.1 AUXILIARY ELECTRIC HEATER OF THE PLANT IN DEFROST CYCLE
During the defrost cycle (see Paragraph 1.19), by setting r21=1 (in addition to r10=1 and r24=1 or 3) the electric heater of the
plant side will be activated if required (detected (regulating) temperature lower than the water setpoint minus r11 (°C)), without
waiting for the time defined by r12.
1.14 ELECTRIC HEATER OF SANITARY WATER PRODUCTION
It is an additional energy resource for the sanitary water tank heating when the compressor is not able to meet the set
temperature within a reasonable time. The output of the auxiliary electric heater of sanitary water is active only if the parameter
H58 is set to 26 (230V AEH AEHN output, it is not set as default) or H61=26 (230V NO1-N output, it is not set as default)
(Please refer to Paragraph 1.25 for other available outputs in the terminal block as well as for their corresponding configurations).
The heater is activated when the parameter r15 is set to 1 (with r15=0 the electric heater is deactivated). The parameter r24 must
be set to 2or 3(please refer to the explanation on r24 parameter settings at the Paragraph 1.17).
If the production of sanitary hot water lasts for a period of time greater than r16 (minutes) and the unit gets blocked due to an
alarm intervention, the electric heater will be enabled. It turns off when the unit concludes the sanitary water production (taking
into account also of any offset set by the parameters r31 as described in the Paragraph 1.17.)
1.15 A SINGLE INTEGRATION HEATER FOR PLANT / DHW PRODUCTION
By configuring the integration electric heater for DHW, see paragraph 1.14, you can use such declared electric heater, also as
an integration electric heater for the plant by using the following setting r15=2.
When the integration electric heater of the plant is activated, the declared DHW electric heater will be activated allowing you
to get a single integration electric heater for DHW production, plant and defrosting operation.
1.16 SELECTION MODE OF AUXILIRY ELECTRIC HEATERS
It is possible to set the order priority of the activation of auxiliary electric heaters of the plant side and of sanitary side as in the
following configurations:
1. r14=0 (default), the heaters are activated simultaneously if they are present;
2. r14=1, the heaters are activated exluding each other:
2.1. r20=0, the priority is for the plant (the sanitary heater will operate only if the thermoregulation for the heater
of plant side is accomplished);
2.2. r20=1, the priority is for the sanitary (the heater of the plant side will operate only if the thermoregulation of
the sanitary heater is accomplished).
1.17 ACTIVATION OF AUXILIARY ELECTRIC HEATER AND BOILER DURING THE JOINT/IN SUBSTITUTION
OPERATION TO THE COMPRESSOR
The compressor is inhibited at low outdoor air temperature.
Considering this mode, there are 4 operation areas of the minichiller:
1) heat pump operation (normal operation, with compressor enabled) in which the auxiliaries electric heaters and the boiler
operate only when the heat pump gets blocked due to an alarm intervention;
2) joint operation (area I), in which the use of the compressor in synergy with axiliaries heaters is enabled (during winter or
sanitary mode, if the outdoor air temperature decreases under r22(°C) (default 7°C) but it remains above r28 (default is -
7°C). The operation becomes normal if the temperature increases above the value of r22 + 1,0°C. Particularly, in this
operation area, the auxiliary heaters and the boiler will operate after a periode of time defined by the parameters r12 (in
minutes) for the plant side and r16 (in minutes) for the sanitary mode, counting from the heat pump startup, according to
the priorities set by the parameters r14, r20 (see Paragraph 1.16) and r23, r24 (see the explanation below). For using the
auxiliary electric heaters, you should enable them by setting the parameter r10 (case of the plant auxiliary heater, see
Paragraph 1.13) and the paramter r15 (case of auxiliary electric heater of sanitary, see Paragraph 1.14).
3) joint operation (area II), in which the compressor and the auxiliary electric heaters are both enabled (during winter or
sanitary mode, if the outdoor temperature decreases under r28 (°C) (default -7°C) but remains above r08 °C, default -
16°C). The unit turns to operate normally when the temperature increases above the value r28+1,0(°C). In particular, in
this operating area, the boiler turns on first, then the heat pump and the auxiliary electric heaters will turn on after a time
defined by r12 ( minutes) for plant side and r16 (minutes) for sanitary side, according to the priorities fixed by the
parameters r14, r20 (see Paragraph 1.16) and r23, r24. When using the auxiliary electric heaters, you should enable them
by setting the parameter r10 (in the case of the auxiliary electric heater of the plant, see Paragraph 1.13) and the
parameter r15 (in the case of the auxiliary electric heater of the sanitary operation, see Paragraph 1.14).
If you want to set that the auxiliary electric heater (of the sanitary or plant side) operates after the heat pump startup, it
is necessary to enable the boiler by setting the parameter r23 to be 4, 5 or 6, whereas if you want that the auxiliary
electric heater turns on before the heat pump startup, you must set the parameter r23 to 0, 1, 2 or 3 (therefore also
including the case when the boiler is not in utilization).
4) Substitution operation, in this kind of operation the use of the compressor will be inhibited and the auxiliary equipments
operate in substitution of it,depending on the period of time defined by the parameter r12 (minutes) for plant side and
r16 (minutes) for sanitary side, (in winter or sanitary mode, if the outdoor temperature drops below r08 (°C), default -
16°C. The compressor will be again activated when the temperature rises above r08 +r09(°C) (r09=1,0°C by default).

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Heat pump
Tout .[°C]
r22=7
r28=-7
r08=-16
0Heat pump + [Boiler and/or electricheater]
[Boiler and/or electricheater]
Boiler + [Heat pump and/or electricheater]
IN JOINT OPERATION I
IN JOINT OPERATION II
IN SUBSTITUTION OPERATION
When modifying the values of the parameters r22, r28, r08, you have to respect the following condition: r22 ≥ r28 ≥ r08.
You can remove the zone corresponding to the joint operation area I just by putting r22=r28; you can also remove the zone
corresponding to the joint operation area II by putting r28=r08; and hence you can remove both joint operation areas I and II just
by setting the three parameters as the following configuration r22=r28=r08.
The auxiliary equipments available for the joint operation or for the in substitution operation are:
- boiler (or external heaters with independent thermoregulation), present if H58=29 (AEH AEHN 230V output not set by
default) or H61=29 (NO1-N 230V output not set by default); (Please refer to Paragraph 1.25 for other available outputs
that can be used in the terminal block as well as for their corresponding configurations).
-Plant auxiliary electric heater (see Paragraph 1.13);
-Sanitary auxiliary electric heater (see Paragraph 1.14).
For the allowed configurations and the available digital outputs of the terminal block, please refer to the paragraph 1.25 and
wiring diagrams.
To define how to use the auxiliary equipments, you must set the two parameters r23 and r24 in order to control respectively the
use of the boiler and the use of the auxiliary electric heater OF the plant:
-r23=0 (default) boiler not used (priority of intervention is for electric heaters);
-r23=1 boiler used just on plant side (priority of intervention is for electric heaters);
-r23=2 boiler used just for sanitary hot water (priority of intervention is for electric heaters);
-r23=3 (default) boiler used for both sanitary hot water and plant (priority of intervention is for electric heaters);
-r23=4 boiler used only for plant side with priority (no intervention priority for electric heaters);
-r23=5 boiler used only for sanitary hot water with priority (no intervention priority for electric heaters);
-r23=6 boiler used on both sanitary and plant sides with priority (no intervention priority for auxiliary electric heaters);
-r24=0 the auxiliary electric heaters are not used;
-r24=1 Utilization only of the auxiliary electric heater of the plant side;
-r24=2 Utilization only of the auxiliary electric heater of sanitary hot water production;
-r24=3 Utilization of both auxiliary electric heaters of plant side and of sanitary hot water production.
Note: On the first three operating areas (heat pump operation, joint operation area I and joint operartion area II), the parameter
r10 must be set to 1 in order to enable the auxiliary electric heater of the plant, while the parameter r15 must be set to 1in order
to enable the auxiliary electric heater of the sanitary hot water production. During the substitution operation, instead it is not
necessary to enable the auxiliary electric heaters with the parameter r10 or r15, because the auxiliary electric heaters operate in
substitution (and not as auxiliary heating systems) to the heat pump (therefore it is enough to select the type of utilization of the
auxiliary electric heaters by setting only the parameter r24).
Then, It is possible to set an analog input in the minichiller for a remote temperature sensor, in order to detect the temperature of
the water plant (setting H19=41, H44=0 and H11=8 then connect the remote temperature sensor to SE-SE terminals, otherwise
setting H20=41,H45=0 and H11=9 for connecting the remote temperature sensor to SAN-SAN terminals) (See paragraph 1.10).
The possible configurations of the parameters related to auxiliary heaters are listed below in the tables 1, 2, 3 and 4, that are
divided by areas of operation (the columns of "MODE" and "rxx" parameters indicate the operation mode and the possible values
of the parameters for allowing the auxiliary heaters to intervene according to a predefined order of intervention, when the unit is
running in a certain type of operation; several modes and values of the parameters can be alternatively selected and they are
reported in the same cell separated by the symbol "/").
TABLE 1. NORMAL OPERATION IN HEAT PUMP MODE
N°
ORDER OF INTERVENTION OF
HEATING SYSTEMS (when the set-
point is not achieved and the unit
is in alarm condition)
MODE
OPERATION
r10
r15
r12
r16
r23
r24
1
1) Auxiliary electric heater of plant
HEAT /
HEAT+SAN
HEAT
1
0/1/2
/
/
0/2/5
1/3
2
1) Boiler
HEAT /
HEAT
0/1
0/1/2
/
/
1/3/4/6
0/2

Controller for HP_OWER
16
HEAT+SAN
3
1) Auxiliary electric heater of plant
2) After r12 minutes, Boiler
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
1/3
1/3
4
1) Boiler
2) After r12 minutes, auxiliary
electric heater of plant
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
4/6
1/3
5
1) Auxiliary electric heater of
sanitary
HEAT+SAN
SANITARY
0/1
1
/
/
0/1/4
2/3
6
1) Boiler
HEAT+SAN/
COOL+SAN
SANITARY
0/1
0/1/2
/
/
2/3/5/6
0/1
7
1) Auxiliary electric heater of
sanitary
2) After r15 minutes, boiler
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
2/3
2/3
8
1) Boiler
2) After r15 minutes, auxiliary
electric heater of sanitary
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
5/6
2/3
9
1) Auxiliary electric heater of
Plant/sanitary
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
/
/
0
3
10
1) Boiler
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
0/1
0/1/2
/
/
3/6
0
11
1) Auxiliary electric heater of
plant/sanitary
2) After r12 minutes, Boiler
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
3
3
12
1) Boiler
2) After r12 minutes, auxiliary
electric heater of plant/sanitary
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
6
3
TABLE 2. JOINT OPERATION, AREA 1
N°
ORDER OF INTERVENTION OF
HEATING SYSTEMS (when the set-
point is not achieved)
MODE
OPERATION
r10
r15
r12
r16
r23
r24
1
1) Heat pump
2) After r12 minutes, auxiliary
electric heater of plant
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
0/2/5
1/3
2
1) Heat pump
2) After r12 minutes, boiler
HEAT /
HEAT+SAN
HEAT
0/1
0/1/2
Set up of
minutes
/
1/3/4/6
0/2
3
1) Heat pump
2) After r12 minutes, auxiliary
electric heater of plant
3) After r12 minutes later, boiler
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
1/3
1/3
4
1) Heat pump
2) After r12 minutes, boiler
3)After r12 minutes later, auxiliary
electric heater of plant
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
4/6
1/3
5
1) Heat pump
2) After r15 minutes, axiliary
electric heater of sanitary
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
0/1/4
2/3
6
1) Heat pump
2) After r15 minutes, boiler
HEAT+SAN
SANITARY
0/1
0/1/2
/
Set up of
minutes
2/3/5/6
0/1
7
1) Heat pump
2) After r15 minutes, auxiliary
electric heater of sanitary
3) After r15 minutes later, boiler
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
2/3
2/3
8
1) Heat pump
2) After r15 minutes, boiler
3) After r15 minutes later, auxiliary
electric heater of sanitary
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
5/6
2/3
9
1) Heat pump
2) After r12 minutes, auxiliary
electric heater of palnt/sanitary
HEAT /
HEAT+SAN
HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
0
3

Controller for HP_OWER
17
10
1) Heat pump
2) After r12 minutes, boiler
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
0/1
0/1/2
Set up of
minutes
Set up of
minutes
3/6
0
11
1) Heat pump
2) After r12 minutes, auxiliary
electric heater of plant/sanitary
3) After r12 minutes later, boiler
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
3
3
12
1) Heat pump
2) After r12 minutes, boiler
3) After r12 minutes later, auxiliary
electric heater of plant/sanitary
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
6
3
TABLE 3. JOINT OPERATION, AREA 2
N°
ORDER OF INTERVENTION OF
HEATING EQUIPMENTS (when the
set-point is not achieved)
MODE
OPERATION
r10
r15
r12
r16
r23
r24
1
1) Boiler
2) After r12 minutes, heat pump
HEAT /
HEAT+SAN
HEAT
0/1
0/1/2
Set up of
minutes
/
1/3/4/6
0/2
2
1) Boiler
2) After r12 minutes, auxiliary
electric heater of plant
3) After r12 minutes later, heat
pump
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
1/3
1/3
3
1) Boiler
2) After r12 minutes, heat pump
3) After r12 minutes later, auxiliary
electric heater of plant
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
4/6
1/3
4
1) Auxiliary electric heater of plant
2) After r12 minutes, heat pump
HEAT /
HEAT+SAN
HEAT
1
0/1/2
Set up of
minutes
/
0/2/5
1/3
5
1) Boiler
2) After r15 minutes, heat pump
HEAT+SAN
SANITARY
0/1
0/1/2
/
Set up of
minutes
2/3/5/6
0/1
6
1) Boiler
2) After r15 minutes, auxiliary
electric heater of sanitary
3) After r15 minutes later, heat
pump
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
2/3
2/3
7
1) Boiler
2) After r15 minutes, heat pump
3) After r15 minutes later, auxiliary
electric heater of sanitary
HEAT+SAN
SANITARY
0/1
1
/
Set up of
minutes
5/6
2/3
8
1) Auxiliary electric heater of
sanitary
2) After r15 minutes, heat pump
HEAT+SAN/
SANITARY
0/1
1
/
Set up of
minutes
0/1/4
2/3
9
1) Boiler
2) After r12 minutes, heat pump
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
3/6
0
10
1) Boiler
2) After r12 minutes, auxiliary
electric heater of plant/sanitary
3) After r12 minutes later, heat
pump
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
3
3
11
1) Boiler
2) After r12 minutes, heat pump
3) After r12 minutes later, auxiliary
electric heater of plant/sanitary
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARy
1
1
Set up of
minutes
Set up of
minutes
6
3
12
1) Auxiliary electric heater of
plant/sanitary
2) After r12 minutes, heat pump
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
1
1
Set up of
minutes
Set up of
minutes
0
3
TABLE 4. SUBSTITUTION OPERATION
N°
ORDER OF INTERVENTION OF
HEATING SYSTEMS (when the set-
point is not achieved)
MODE
OPERATION
r10
r15
r12
r16
r23
r24

Controller for HP_OWER
18
1
1) Boiler
2) After r12 minutes, auxiliary
electric heater of plant
HEAT /
HEAT+SAN
HEAT
0/1
0/1/2
Set up of
minutes
/
4/6
1/3
2
1) Auxiliary electric heater of plant
2) After r12 minutes, boiler
HEAT /
HEAT+SAN
HEAT
0/1
0/1/2
Set up of
minutes
/
1/3
1/3
3
1) Boiler
2) After r12 minutes, Auxiliary
electric heater of sanitary
HEAT+SAN
SANITARY
0/1
0/1/2
/
Set up of
minutes
5/6
2/3
4
1) Auxiliary electric heater of
sanitary
2) After r12 minutes, boiler
HEAT+SAN
SANITARY
0/1
0/1/2
/
Set up of
minutes
2/3
2/3
5
1) Boiler
2) After r12 minutes, auxiliary
electric heater of plant/sanitary
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
0/1
0/1/2
Set up of
minutes
Set up of
minutes
6
3
6
1) Auxiliary electric heater of
plant/sanitary
2) After r12 minutes, boiler
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
0/1
0/1/2
Set up of
minutes
Set up of
minutes
3
3
7
1) Boiler
HEAT /
HEAT+SAN
HEAT
0/1
0/1/2
Set up of
minutes
/
1/3/4/6
0/2
8
1) Auxiliary electric heater of plant
HEAT /
HEAT+SAN
HEAT
0/1
0/1/2
Set up of
minutes
/
0/2/5
1/3
9
1) Boiler
HEAT+SAN
SANITARY
0/1
0/1/2
/
Set up of
minutes
2/3/5/6
0/1
10
1) Auxiliary electric heater of
sanitary
HEAT+SAN
SANITARY
0/1
0/1/2
/
Set up of
minutes
0/1/4
2/3
11
1) Boiler
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
0/1
0/1/2
Set up of
minutes
Set up of
minutes
3/6
0
12
1) Auxiliary electric heater of
plant/sanitary
HEAT /
HEAT+SAN
IN HEAT OR IN
SANITARY
0/1
0/1/2
Set up of
minutes
Set up of
minutes
0
3
The below Table (5) shows the parameter to be set in order to enable the auxiliary electric heaters in "Summer and sanitary"
mode (in this case, the only available auxiliary electric heater is the one of sanitary side and the subdivision between
normal/joint/substitution operation is not valid ).
TABLE 5. OPERATION IN COOL+SAN MODE (SANITARY MODE IS OPERATING)
N°
ORDER OF INTERVENTION OF AUXILIARY
ELECTRIC HEATERS
- when the set point is not achieved
after r16 minutes from the compressor
startup or
- when the set-point is not achieved and
the unit is in alarm condition.
MODE
OPERATION
r10
r15
r12
r16
r23
r24
1
1) Auxiliary electric heater of sanitary
COOL+SAN
SANITARY
0/1
1
/
Set up of
minutes
0/1/2/3/4/5/6
2/3
The below Table (6) shows the behavior of the auxiliary electric heaters of both sanitary and plant in all cases where the unit is
operating.
TABLE 6. OPERATION OF AUXILIARY ELECTRIC HEATERS
N°
MODE
OPERATION
AUXILIARY ELECTRIC HEATER OF PLANT
AUXILIARY ELECTRIC HEATER OF SANITARY
1
HEAT+SAN
HEAT
It works as indicated in the TABLES 1,2,3 and 4.
During "HEAT+SAN" operation, the sanitary
thermoregulation by default will have priority
over that of the plant side, so if the
thermoregulation is required, the unit will start
the "SANITARY" mode operation and the the
auxiliary electric heater of sanitary side behaves
as described in the TABLES 1 , 2, 3 and 4.

Controller for HP_OWER
19
2
HEAT+SAN
SANITARY
Only if the following 3 conditions are fulfilled:
- Output for auxiliary electric heater of plant
side is configurated;
- r24=1/3;
- the remote sensor of water plant
temperature is installed and configured (see
paragraph 9.11);
the auxiliary electric heater of the plant is
available:
- after r12 minutes from the beginning of its
counting when activated previously in
“HEAT” operation mode (see line N°1);
- if not already activated its counting in the
previous "HEAT" operation mode, after r12
minutes from the thermoregulation
requirement.
In SANITARY mode, if the remote sensor is not
set, the auxiliary electric heater of the plant
will be disabled or its eventual counting will be
stopped.
If the "on-off remote contact" turns to the
open state, the auxiliary electric heater of the
plant will turned off.
It works as indicated in the TABLE 1,2,3 and 4.
3
COOL+SAN
SANITARY
Not available.
It works as indicated in the TABLE 5.
4
COOL+SAN
COOL
Not available.
Not available.
During the joint operation or in substitution operation, for boiler and/or auxiliary electric heaters (depending on your resources
and on the selected priorities) it is possible to determine a set-point in heating or sanitary greater than the one of the heat pump.
This is achieved by setting a temperature offset for the set point:
-r29: Temperature offset for boiler and electric heaters of the plant for the first set point (G02);
-r30: Temperature offset for boiler and electric heaters of the plant for second set point (G05);
-r31: Temperature offset for boiler and sanitary electric heaters (G03).
In this way, the heat pump will stop when achieving the set-point (G02, G03, G05) and the temperature difference can be
supplemented by the boiler and/or electric heaters according to the selected temperature offset.
1.17.1 BOILER MANAGEMENT
You can determine if the boiler has its own circulating pump and if the adjustment is done by thermoregulation sensor of the
Heat pump or by mean of the integrated sensors in the boiler, the combinations are in fact defined by the parameter r32:
r32 = 0: boiler without a circulating pump with thermoregulation done by the minichiler unit.
r32 = 1: boiler equipped with an independent circulating pump with thermoregulation done by the minichiler unit
r32 = 2: boiler without circulating pump with independent thermoregulation
r32 = 3: boiler equipped with a circulating pump with independent thermoregulation
1.17.1.1 BOILER EQUIPPED WITH A CIRCULATING PUMP
When the boiler is equipped with a circulating pump and operates in substitution mode, please turn off the utilization pump
(which is an integrated circulator in the heat pump) by setting r32 = 1 or 3.
When the activation of the boiler is required to substite the minichiller unit, the utilization pump is constrained to stop, the boiler
will be activated after P01 seconds.
When the boiler shut off is required, the utilization pump is inhibited to startup for P01 second, (also the compressors that are
enabled during the startup only after P01 seconds from the startup of the utilization pump).
Note: During the operation of integration, the actual functionalities of the system are kept. When the defrosting protection occurs
on the water side, the utilization pump will be activated (or remains on).
1.17.1.2 BOILER EQUIPPED WITH INDEPENDENT THERMOREGULATION
When the boiler is equipped with an independent thermoregulation and works substiting the minichiller unit.

Controller for HP_OWER
20
By setting r32 = 2 or 3, the boiler control is activated (using the thermoregulator inside the boiler is used) regardless of the
minichiller (HP) thermoregulation.
If the boiler is not equipped with independent circulator, it is necessary to keep utilization pump active.
In the presence of the plant call function (with boiler working on plant side) and the plant is fullfilled (or with minichiller (HP) is not
ON) the boiler thermoregulation is not enabled.
1.18 INDICATION ON SUMMER/WINTER OPERATION
You can set a digital output to indicate the operating mode of the unit, plant side (the digital outputs are at 230V AC, therefore
they must control a relay, not included, with free contacts). The digital outputs are set when the value 31 is attributed to the
parameters H58 (AEH-AEHN 230V output) or H61 (NO1-N 230V output) (Please refer to Paragraph 1.25 for other outputs that can
be used in the terminal block as well as for their corresponding configurations). The output is active during summer operation
while is disabled in OFF mode or winter mode. During sanitary hot water production and defrosting mode, the output keeps the
setting of the last operating mode.
1.19 DEFROSTING CYCLE
The defrost cycle function is available only in heat pump mode and is used to prevent the frost formation on the surface of the
air/air coil. The frost formation on the evaporator, which occurs more frequently at very low ambient temperatures, in addition to
greatly decreasing the thermal efficiency of the unit, it can lead to the risk of damaging the unit itself. The adjustable parameter
from the maintenance menu are: d02, for the pressure of intial defrosting proccess (bar) and d08, for setting of the minimum time
interval between two consecutive defrosting processes (minutes), it is not recommended to change the default values.
1.20 COMPRESSOR CRANCKASE HEATER
The crankcase heater operates when the compressor remains off for at least 30 minutes and if the discharge temperature is below
20°C (with hysteresis of 2.0°C). When the compressor restarts, the crankcase heater will stop.
1.21 WATER SIDE DIVERTING VALVE
The HP_OWER models which only requires a diverting valve for water side with 3 contacts and limit switch. The valve switches
operation between heating (or sanitary) mode and cooling mode. When the unit is OFF, the last position of the valve will be kept.
Associated with the adjustment of the valve there is also an activation time delay of the pump and of the circulator, which is
necessary for allowing the complete commutation of the valve itself. The diverting valve gets on when you set the operating mode
of the unit, and when the unit changes operation from sanitary or heat mode to cold mode and vice versa. The commutation is not
expected, however, if the unit restarts with the last configuration or if it is in sanitary or heat mode and should enter in defrost
cycle.
1.22 PLANT SECONDARY PUMP
To allow the start up of the plant secondary pump (PSP), you must configure for example H58 = 26 (for other serviceable outputs
of the terminal block and their configurations please check the Paragraph 1.25.
With a call plant, the secondary pump starts to operate and after the end of the call plant, the secondary pump of the plant
switched off with a delay of post-pumping equal to P02 seconds.
If the system is equipped with a configured room thermostat (RT) and connected to the On/Off terminals of the minichiller
terminal block, see WIRING DIAGRAMS Paragraph of the user’s-installer’s manual, the secondary pump system will be activated
when there is a call from RT independently of the thermoregulation fulfillment of minichiller unit.
At the end of the RT call, the minichiller will turn off and the plant secondary pump will stop after the post-pumping.
When the minichiller unit is off, the secondary pump of the plant is off regardless of plant call.
1.23 DOUBLE SET-POINT (without remote control touch-screen cod. 00264040)
The double set-point function introduces a second working set-point of the plant side (in both cooling and heating modes).
You can configure in the user terminal block a digital input which provide a consent for the transition from the first to the second
set-point and vice versa or which connect the humidistat (just in case you do not have the touch-screen remote control ).
1.23.1 HEAT PUMP SETTING
H82 is the parameter used for adjusting the mode of dual set-point (from maintainer menu):
H82
OPERATION
0
N.D.
1
Classic mode
2
Dual set-point active in the summer
3
Dual set-point active in the winter
4
Dual set-point active in both summer and winter
Input settings: H44=26 for the setting of DI7 digital input (terminals SE-SE);
It is also available in the user terminal block a digital output terminal voltage (230V, 50Hz, 5A resistive, 1 A inductive) that switches
according to the transition from the first to the second set-point and vice versa. This can be used for example to switch a hydronic
valve for flow deviation between a radiant system and a ventilating system. Use a relay if necessary for the power supply line of
the valve hydronic.