JUMPER SET-UP
This digital controller is intended for temperature regulation in environments equipped with fan-coil heat-cool exchangers.
The device automatically controls the fan speed on 3 levels as well as the possible valves in order to regulate the room temperature in the most suitable way. Temperature acquisition can be performed either with the internal sensor or with an external one (optional).
The user has five buttons available to control the thermostat.
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.
If the thermostat is configured in the “Economy“ function (P17), the “
“
This button changes the set fan speed. When the “
where 1, 2 and 3 mean the three fixed fan speeds meanwhile AUT mean the automatic fan speed.
More precisely 1 means the lowest speed, 2 the medium speed and 3 the fastest. Therefore when the controller is set on one of the three mentioned speeds, the fan will be activated when necessary at that (fixed) speed. Whenever the automatic speed is set instead, the controller will activate the fan at a speed as much high as the difference between the desired room temperature against the current one.
Key “
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 configured to show the delivery water temperature, this value will be displayed with a further button depression. When changing the readout, the controller informs the user about the temperature shown according to the following table:
Repeatedly press the button to cyclically display the various temperatures. When inactive for a few seconds the display returns to room temperature.
These buttons set the desired room temperature (set-point) and the configuration parameters. If
Even in this case, after a few seconds of inactivity the display readout returns to the room temperature.
DISPLAY VIEW
The thermostat is equipped with an LCD display that shows temperature and settings.
Symbols displayed:
The symbols that can be shown on the display are described in the following table:
The “fan speed“ symbols show fan status: all off when fan is off; all lit when fan is on, according to the following indications:
Symbols “
Two pipes system:
Four pipes system:
Electric heater system:
Integrating electric heater system:
Heat pump system:
Symbols can also be flashing, to explain that the relevant output should be turned on, yet it is temporarily disabled by another function.
As an example, outputs are disabled in the following situations:
WARNING
Carry out the operations below to install the device, while following the images in page 3 to page 7:
This controller can be powered either with 230V~ or with 24V~. The thermostat is factory set at 230V~, with jumper in position JP1, with frequency at 50Hz, with jumper in position JP4. To select 24V~ supply move jumper JP1 (Fig. 6) to position JP2 (Fig. 6). To select 60Hz frequency move jumper to JP4 (Fig. 6) to position JP3 (Fig. 6). As can be seen in Fig. 7 supply terminals are L and N. If you have a 230V power supply, the live and neutral must be respected An input is available on terminal 3 for centralised heating/cooling selection. An input is available on terminal 4 to activate “Economy” mode. A window contact can be connected to terminals 14 and 16.
Note: there are limitations for window contact use. Carefully read the paragraph “ATTENTION”.
The function of the input terminals 3, 4 and 16 can be changed, through parameters C14, C15 and C16. Signals to terminals 3 and 4 can be connected terminals 3 and 4 of other thermostats in the same building (centralised Heating/Cooling function). RS connector, or alternatively terminals 14 and 15, can be used to connect an external room temperature sensor. Change configuration to select external or internal sensor use. Terminals 13 and 14 is an input to connect different types of sensors for special functions: connect a delivery temperature sensor for the “changeover“ and/or “cut-off thermostat” function, or connect a bimetal thermostat with “cut-off thermostat” function. Change configuration to select which type of sensor to use.
This device is suitable to control the fan speed of a 3-speed fan motor. The speed selection is done through three relays, which outputs are available on terminals 6, 7 and 8. 5 is the common terminal of the relays. Fig 7 shows how to wire the fan motor. Fan outputs from terminals 5 to 8, are voltage free contacts and are isolated towards the other thermostat circuits.
Therefore, a thermostat can be supplied with SELV low voltage (24V~), while controlling a high voltage fan (230V~).
In this case, 24V~ SELV and 230V~ cables must be separated in accordance with current standards.
In particular, it is necessary to secure the two groups of cables with cable ties separating the SELV wires from the others. This is required to avoid that the insulation to SELV is reduced in the event of a wire accidentally disconnects. Terminals 9 and 10 are for the heating output, while terminals 11 and 12 are for the cooling output. Fig. 8 shows different valve connection modes, according to their type. Change configuration to select which type of valve is used.
If on-off or proportional PWM on-off valves are used, connect according to Fig. 8 a or c. If 3 point floating servocontrols are used, connect according to Fig. 8 b or d. Systems with different types of valves on heating and cooling outputs can be managed. If the system has an electric heater for integration or in replacement of the heating valve, connect according to diagrams in Fig. 8 e or f.
The thermostat can also manage a heat pump system and, therefore, control the compressor and a 4-way change-over valve. In this case connect as in Fig. 8 g. The change-over valve is connected to a different terminal to get a reverse operation logic.
CLASSIFICATION UNDER REG. 2013.811.EC
In the view of a constant development of their products, the manufacturer reserves the right for changing technical data and features without prior notice. The consumer is guaranteed against any lack of conformity according to the European Directive 1999/44/EC as well as to the manufacturer’s document about the warranty policy. The full text of warranty is available on request from the seller.
HEATING/COOLING SELECTION
Heating or cooling modes are selected by keeping the
Then, by pressing the
When the thermostat is configured for automatic or centralised heating/cooling selection, the selection cannot be manually changed and if tried, the display shows the flashing “
DELIVERY WATER SENSOR
This controller features an input for the delivery water temperature sensor: when this sensor is installed the controller can automatically understand whether it should be working in “cooling“ mode or in “heating“ mode: this function is called “water temperature changeover”.
The water temperature is also used to perform the “cut-off thermostat“ function.
Alternatively a bimetallic thermostat can be wired to the input to get the “cut-off“ function.
EXTERNAL INPUTS – TERMINALS 3, 4 AND 16
The thermostat has three external inputs that can be associated to different functions through parameters C14, C15 and C16.
Signals to terminals 3 and 4 can be connected to terminals 3 and 4 of other thermostats in the same building for centralised functions. The signal on terminal 16 cannot be connected to other thermostats. Functions that can be associated to the inputs are:
“Centralised Heating/Cooling“ function:
When installations have multiple thermostats in a single building, the centralised inputs of each thermostat can be connected together and controlled by the central heating room.
This way the central heating room determines whether the thermostats must operate in the heating or cooling mode.
“Economy“ function:
The input activates/deactivates the economy mode (see the “Economy function“ paragraph). This function can be associated with the following icon: “
and not to the level, so it is always possible to change the economy status with the “
“Regulation stop“ function
The input can suspend or reactivate room temperature regulation. When temperature regulation is suspended the fan is stopped, the valves remain closed and the relevant symbols on the display will flash. This function can be associated with one of these icons: “
Note: there are limitations for window contact use. Carefully read the paragraph “ATTENTION”.
“Thermostat ON / OFF“ function
The input turns the thermostat on or off, like pressing the “
“Motor alarm“ function
The input lights the “
“Electric heater alarm“ function
When the alarm is activated “
“Dirty filter“ warning function
the input activate the dirty filter warning, the “
This controller acquires both the room temperature and the delivery water temperature in the fan-coil exchanger with NTC type sensors.
The room temperature is acquired and displayed with the above mentioned resolution in the range -10°C .. +50°C.
The controller features an internal temperature sensor and also an input for a remote sensor is also available.
The selection between internal or remore sensor is done through parameter P10 in the “installer configuration“.
The supply water temperature in the fan-coil is acquired through a remote sensor and can be displayed with 1°C resolution in the 0°C .. 99°C range.
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.
The cutoff temperature function is used to inhibit the fan operation whenever, in heating mode, the delivery water is not hot enough. In order to accomplish this function a delivery water sensor must be wired, alternatively, a bimetallic thermostat can be wired to the same terminals. In case the delivery water sensor is used, the “water hot enough” threshold is defined on parameter P22. In case this function is not needed, parameter P22 can be set to a very low value (0).
In case a bimetallic thermostat is used for this function, parameter P07 must be set to the value “2“: in this case the fan operation will be enabled only when the bimetallic contact is closed.
When this type of bimetallic thermostat is used the water temperature cannot be displayed, nor the automatic changeover function can be performed. Please refer to the section “Installer Configuration“ to set the parameters related to the above described functions.
The cut-off temperature function is also available in cooling mode. In this case the fan operation is inhibited when the water delivery is not sufficiently cold, according to the threshold defined on parameter P23. In case this function is not needed, parameter P23 can be set to a very high value (99).
When the delivery water temperature is not sufficiently hot or cold as per P22 and P23 thresholds, the display shows the “
ELECTRIC HEATER SYSTEM
The thermostat can be configured (P01=2) to manage a system with an electric heater for heating the room and a valve that regulates the cool water for cooling the room. Follow the wiring diagram in Fig. 8 e and f. In this type of system it is suggested to set a delay on the fan switch-off on P21, so that when the electric heater is switched off, the fan keeps running to cool the heater down.
In this type of system it is possible to have a neutral zone regulation setting the automatic heating/ cooling selection (P02=1).
In case the cut-off temperature function is used in this system, the fan will never be inhibited while in heating mode.
INTEGRATING ELECTRIC HEATER SYSTEM
This regulator can be configured (P01=3) to manage a special plant type featuring two heating systems: one with a hot water flow controlled by a valve, the other with an integrating electric heater. In this mode the regulator is only driving one valve wired at the cooling output to manage a special plant type featuring two heating systems: one with a hot water flow controlled by a valve, the other with an integrating electric heater. In this mode the regulator is only driving one valve wired at the cooling output and one integrating electric heater wired at the heating output.
The relevant wiring diagram is in Fig. 8 e and f. The valve is driven as in a two pipes system: according to the heating or cooling setting of the controller the relevant flow of hot or cool water is managed.
The electric heater is turned on as an additional (integrating) heat source whenever, in heating mode, the room temperature falls below the set point temperature by a Δ setpoint that can be configured in parameter C18.
In cooling mode it is possible to have a neutral zone regulation by setting a neutral zone width greater than zero on P19. In this case cooling is achieved by activating the valve, while heating by activating the electric heater. In this type of system it is suggested to set a delay on the fan switch-off on P21, so that when the electric heater is switched off, the fan keeps running to cool the heater down.
In case the cut-off temperature function is used in this system, the fan will never be inhibited while in heating mode, since the electrical heater will be turned on in advance instead.
HEAT PUMP SYSTEM
The regulator can be configured to manage a heat pump system (P01=4) thus controlling a 4-way valve wired at the heating output and a compressor at the cooling output.
The wiring diagram is shown in Fig. 8 g. The 4-way valve output is always turned on or off according to the heating or cooling setting of the regulator.
In case the “EUROPEAN“ type of driving is chosen, the 4-way valve is powered in heating mode and left unpowered in cooling. Alternatively, with the valve wired at terminal 10, the driving logic is reversed: the valve is powered in cooling and left unpowered in heating (“USA“ type).
The compressor output is active whenever it is necessary to “pump“ the heat, that is when the room needs to be cooled down or heated up. It is advisable to set a delay on the compressor output (parameter C09) in order to avoid too frequent turn-off and turn-on.
In the heat pump mode the supply water temperature sensor can still be wired and its purpose is for protection against freezing or overheating of the heat exchanger. Should the supply sensor, when in cooling mode, detect a temperature lower than C02, the regulator stops the compressor (anti-freeze protection).
On the other hand, should the supply sensor, when in heating mode, detect a temperature higher than the value stored in parameter P22, the regulator stops again the compressor (over-heat protection).
UNDERFLOOR HEATING SYSTEMS WITH FAN COIL FOR COOLING
The thermostat can be configured to manage a special system which uses different means of temperature conditioning depending on whether heating or cooling is needed in the room. For example, in summer season a fan coil can be driven for room cooling by controlling the fan and the cold valve, while in winter season it could only drive the hot valve of the underfloor system, always keeping the fan coil fan off.
The thermostat can receive information on the summer/winter status directly from the heating system on an input (3 or 4), in this way there will be an automatic management of the seasonal changeover, with an automatic recall of the climate mode and setpoint of the respective season. To configure this type of system, set P01 = 1 and P03 = 4.
The “Economy“ function allows to temporary set an energy saving mode through a reduction of the actual setpoint temperature by a step (configurable) when in heating mode, or increasing it by the same step when in cooling mode.
The value for this reduction step is set with parameter P17: when this is set to 0.0 the Economy function is actually disabled. The Economy mode is activated by the “
The Economy mode can be remotely activated in centralised mode, even for multiple thermostats, using the inputs to terminals 3 or 4 (see parameters C14 and C15).
Since the thermostat is sensitive to signal status changes and not to the level, use the “
DIRTY FILTER WARNING FUNCTION
Fan-coils and other devices including a fan are often equipped with a filter for the air in the suction path, which needs a periodical maintenance and cleaning or replacement. This regulator can warn the user when the maintenance has to be made, provided the “Dirty filter warning“ function has been enabled.
The function is activated by setting the time-to-maintenance on parameter P24. The thermostat will count the fan operation time and when the threshold set in P24 (per 100 hours) is reached, the “
This device can drive in a proportional way both valves and fan in order to control room temperature with the highest comfort and energy saving. Nonetheless each different environment needs a different set for some parameters in order to get an accurate regulation.
Parameters responsible for the regulation accuracy are:
For each of the settings two parameters are available, because the user is allowed to set different values for heating and cooling mode. Proportional band, measured in °C, is intended as the difference between setpoint and room temperature which is needed to fully open the regulating valve.
The narrower the proportional band, the fastest is the regulator to counteract temperature variations in the room. Yet a too “narrow“ value for this parameter can result in room temperature oscillations or system instability.
A too “wide“value could result in the impossibility to reach the setpoint temperature in the room. When the integral time is set to zero, no integral action is made and therefore the regulation is purely proportional (P type). When an integral time different from zero is set the resulting regulation is made of a Proportional plus an Integral action (P + I type).
The smaller the integral time, the greater the influence of the integral action and vice-versa: with a greater integral time the resulting integral action is softer. A too soft or null integral action could result in the impossibility to reach the setpoint temperature, meanwhile a too strong integral action could possibly generate oscillations in the room temperature. It is necessary to adjust these parameters according to the actual environment in which the regulator is installed to get the best regulation accuracy.
When PWM valves or floating servo-actuators are used the quality of the final proportional regulation is directly associated to how accurately is performed the system tuning. When simple on-off valves are used no proportional action can be obtained: the relevant driving will always be either full-on or full-off, with a differential value set on parameter P18.
In this situation both parameters “proportional band“ and “integral time“ are not used.
The fan is driven in a proportional way only in case the regulator has been set with automatic speed control. When the valve is proportional type, the P + I regulation will provide the correct fan speed, meanwhile in case the valve is not proportional type , the fan speed will be selected according to a purely proportional (P) rule, therefore only the “proportional band“ parameter will be used to decide how reactive will need to be the fan against variations in the room temperature.
The distance between the three speed stages is calculated dividing by three the proportional band and rounding down. For example if the proportional band is 2°C, the distance between stages will be 0.6°C.
This regulator can drive the following type of valves:
ON-OFF: if Normally Closed (NC) it enables the water flow when power is applied; if Normally Open (NO) water is normally flowing when the valve is unpowered and is stopped when powered. Wiring diagram in Fig. 8 a, c and e.
PWM: same as above; moreover the regulator controls the water flow in a proportional way by driving the valve with power pulses whose duration in time is a function of how much heat the room is requiring (PWM).
3 point floating servocontrol: this is a kind of motor valve featuring one “open“ wire and one “close“ wire, plus a common wire. This type of valve is characterized by a nominal opening time (defined by the manufacturer) whose value must be set into parameters C03 and C04. The regulator will drive this valve through power pulses with one second resolution in a way that its stem will reach the position needed for the regulation, thus performing a proportional modulation.
The relevant wiring diagram is shown in Fig. 8 b, d and f. When the thermostat is configured to control a 3 point valve, upon power-up, before starting the room temperature regulation, it will perform a valve position resynchronisation cycle.
This consists of closing the valve for a time equal to 150% of the nominal set time. The resynchronisation cycle in progress is shown on the display by the “
This cycle will be periodically repeated in order to recover possible positioning errors which might be accumulated during time.
Installer configuration defines the thermostat operation and allows to adapt it to the different types of plants and systems. To access the configuration menu, simultaneously press the “
Once entered in configuration menu, pressing “
Press the “
When scrolling the parameters pressing button “
To change the value, when it is displayed, press button
To prevent unauthorised access to the configuration remove the internal jumper (JP5) shown in Fig. 6. Any attempt to access the configuration will display the flashing “
The installer configuration consists of two lists of parameters:
The extended parameters C01-C19 allow an advanced thermostat configuration.
When the display shows “COn“ at configuration start or “End“ at configuration end, press the “
INSTALLER CONFIGURATION RESET
In order to reset the installer configuration, so that all parameters are reset to the factory default values, enter the configuration mode by holding down the keys “
The main installer configuration parameters are shown in table 1 and explained below.
P01: System type selection.
P02: This parameter sets the way how the controller switches from the cooling mode (summer) to the heating mode (winter) and vice versa.
The switching can be either manual or automatic:
P03 and P04: these parameters set which outputs are controlled.
When in heating mode parameter P03 is used, when in cooling mode P04 is used instead, in this way you can choose different means of temperature conditioning depending on the season.
Each parameter defines whether the thermostat must regulate the temperature by acting on the valve or on the fan or on both.
P05 and P06:
these parameters set which type of valve is wired respectively at the heating and cooling outputs. See “Valve types“ section for more informations.
P07:
This parameter sets the type of the sensor used for the acquisition of the delivery water temperature.
When set to value 0 or 1 we mean that a sensor is used for the acquisition of the water temperature, properly wired to terminals 13 and 14: when 1 is set, the temperature value can also be displayed, according to the user choice. In case 0 is set, the information coming from the temperature sensor is still used for the regulation purpose, even if its value can not be displayed. connected to terminals 13 and 14 to perform only the cut-off temperature function when in heating mode.
P08:
This parameter enables the room “de-stratification“ function. With this function the fan is turned on, at its lowest speed, for about 1.5 minutes every 15 minutes.
The function is only active when the fan should be turned off according to the room temperature regulation.
P09:
In case of a black-out the thermostat remembers its latest state and when the power returns, it restarts with the same settings (on/off, heating/cooling, etc.). Anyway, in some situations it is requested that the thermostat restarts to a know state (i.e. always OFF or always ON). This can be accomplished by setting parameter P09 to “2“ (always restart from “ON “) or “3“ (always restart from “OFF“).
P10:
Room temperature sensor selection.
This parameter sets whether the temperature sensor used for regulation has to be the internal one in the thermostat or the external one (optional).
P11:
With this parameter a slight correction (offset) for the acquired room temperature can be set. 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 being this a value which is actually added to the acquired temperature reading.
P12 and P13:
These two parameters set the range of the setpoint temperature when in heating mode. In details P12 is the lower limit, it can be configured in the range 5.0°C .. 35.0°C. while P13 is the upper limit, whose value can be configured starting from the actual P12 value until 35.0°C. The maximum range is then 5°C .. 35°C and it can be easily modified according to the installation needs.
P14 and P15:
These two parameters set the range of the setpoint temperature when in cooling mode with the same logic as those in the former step. When the heating/cooling mode is changed, the limits of the setpoint temperature are automatically modified in turn.
When the “neutral zone“ operation is selected, these two parameters will not be used and only the P12 and P13 values will be taken into account.
P16:
This parameter defi nes an anti-freeze temperature (in °C), that is a minimum temperature which is maintained in the room even when the regulator is turned off.
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.
P17:
This value defines the entity of a temperature reduction step (in °C) used to perform the “Economy“ function.
The actual setpoint is therefore reduced (when in heating mode) or raised (when in cooling mode) by this step, once the “Economy“ function is made active.
Setting this parameter to 0.0 the “Economy“ function is always disabled.
P18:
This parameter sets the differential (in °C) used in the regulation process when on-off loads are used.
P19:
In case the controller is configured for a neutral zone operation this parameter determines the neutral zone amplitude in the range 0.0°C .. 11.0°C. This value has to be intended centered across the setpoint temperature.
P20: 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.
P21:
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 or electric heater to dissipate the residual heat.
P22:
This parameter defines the threshold above which the delivery water is considered sufficiently hot for the cut-off temperature function in heating mode. In case this function is not wanted, set the parameter to zero. If, instead, the “heat pump” system has been configured, this threshold protects the heat exchanger from overheating.
See “Heat pump system” section for further information.
P23:
This parameter defines the threshold below which the delivery water is considered sufficiently cold for the cut-off temperature function in cooling mode. In case this function is not wanted, set the parameter to 99.
If, instead, the “heat pump” system has been set this threshold protects the battery from freezing.
See “Heat pump system” section for further information.
P24:
This parameter sets the time after which the “Dirty Filter Warning“ is shown; it can be set in the range 0..50 x 100h. As an example “10“ means that the warning will be shown after 10 x 100 = 1000 hours of fan operation. When set to 0 the function is disabled.
The extended installer configuration parameters are shown in table 2 and explained below.
C01 and C02:
These parameters define the thresholds for the automatic changeover function: if the function is not used this information is not applied. The C01 parameter represents the lower threshold, set in the 0°C .. 24°C range, while C02 represents the upper threshold in the 26°C .. 48°C range.
C03 and C04:
In case a floating actuator is chosen as regulating valve, these parameters must be set to the opening time (in seconds) of the heating output actuator and the cooling actuator, respectively.
In case instead a PWM valve is chosen, this parameters must be intended as the cycle-time for the valve or, in other words, the modulation repetition time, i.e. the time occurring between two adjacent power pulses applied to the valve.
C05 and C06:
These parameters set the proportional band amplitude (in °C) when in heating and in cooling mode respectively.
These paramaters can be set in the 0.8 .. 8.0°C range, yet the lower limit could be higher, being related to the differential value stored in P18.
C07 and C08:
these parameters are used to set the integral time respectively for regulation in heating mode and in cooling mode. When set to zero no integral action is performed.
C09:
This parameter determines the timing (in minutes) of the cooling output, when controlling an on-off valve (or other load).
This function is enabled only in the “4 pipes”, “electric heater” and “heat pump” systems: if the cooling output is switched off, it can be switched on again only after the time configured on C09.
A compressor, which is normally not rated to tolerate repeated switch-offs and switch-ons, can thus be controlled directly.
C10 and C11:
Respectively represent the minimum power percentage of the heating and cooling proportioning valve.
The minimum power is the opening percentage of the proportional valve below which the fan is kept off to avoid that the fan blows when the valve has not yet opened the water flow.
C12:
Sets the number of speeds of the fan motor used in the system.
Typically Fan motors are 3 speeds type, but this parameter allows 1 and 2 speeds motors to be managed also.
C13:
Determines which fan speeds can be set with the “fan“ button.
In certain installations it may be necessary to limit “
Table 3 shows the available combinations.
C14, C15 and C16:
These parameters allows to set which function must be associated to the 3, 4 and 16 inputs.
Table 4 shows which functions can be associated to each input. It is the installer’s responsibility that each function is not associated to more than one input. See the “External inputs – terminals 3, 4 and 16” section for further information.
C17:
Determines which operating modes can be set with the button “
C18:
This parameter configures the integration “Δ set point“ of the electric heater system.
See the “Integrating electric heater system” section for further information.
C19:
If the buttons are inactive for a few seconds the thermostat returns to display the room temperature. When this parameter is set to 1, the thermostat displays the set-point temperature instead of room temperature.
For a correct temperature acquisition it is mandatory to remember and apply the following tips:
Table 1: Main configuration parameters
Table 2: Extended configuration parameters.
Table 3: C13 parameter – Fan speed “
Table 4: PARAMETERS C14, C15, C16 – Functions associated to 3, 4 and 16 inputs.
Table 5: C17 parameter – On/Off ““ button limitation.
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