seitron 038576 Digital Control Unit For Thermal Solar Systems Instruction Manual

038576 Digital Control Unit For Thermal Solar Systems

DIGITAL CONTROL UNIT FOR THERMAL SOLAR SYSTEMS

WARNING
The installation technician shall operate in full compliance with all the applicable technical standards in order to grant the unit safety. DESCRIPTION OF THE KEYS
SELECTION KEYS

RESET KEY

MENU KEY

CANCEL KEY 1

CONFIRMATION KEY

KEY `ABC FUNCTION’

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OVERVIEW
This device is a centralized control unit for thermal solar
panels. Equipped with 3 relay outputs (2 for loads + 1 for
alarm), PWM output, 0..10V output and 3 inputs (sensors), can configure and manage up to 6 different types of solar systems. When a specific installation is selected, the control unit automatically manages the outputs and inputs used to control the valves, the pumps, the integrative sources and
the probes used in the type of installation selected.
Moreover on the backlit LCD display it is possible to visualize the hydraulic diagram of the installation set up, the state of
the outputs, the probes as well as several other data and
informations.

0..10V: Amplitude:

0V..10V ±10%@10V

Minimum load: 10KOhm.

Max allowed PWM / 0…10V

cable length:

< 3m.

Protection grade:

IP 40

Type of action:

1

Overvoltage category: II

Pollution degree:

2

Tracking Index (PTI):

175

Class of protection against electric shock: Rated impulse voltage:

II 2500V

Number of manual cycles: 50000

AVAILABLE ACCESSORIES AND SPARES · Accessories for free contacts: 2 x 230V~ inputsand 2
free voltage outputs · NTC probe 10K Ohm @25°C ±1%, -50°C .. +200°C
(blue cable) · NTC probe 10K Ohm @25°C ±1%, -50°C .. +110°C
(yellow cable) · Brass pocket 1/2″ 7x38mm

TECHNICAL FEATURES

Power supply:

230V~ ±10% 50Hz

Power absorption:

<2 VA

Sensors type:

3 x NTC 10K @ 25 °C ±1 %

Sensor operating range: -50 °C .. +200 °C (collector)

-50 °C .. +110 °C (boiler) Temperature reading range: -20 °C .. 180 °C

Number of automatic cycles: 100000

Software class: EMC test voltage:

A 230V~ 50Hz

EMC test current:

34mA

Distances tolerances fault

mode `short’ exclusion: ±0,15mm

Ball pressure test temperature: 75°C

Operating temp. range: 0°C .. 40°C

Storage temp. range:

-10°C .. +50°C

Humidity limits:

20% .. 80% RH non-condensing

Case:

Material: ABS V0 self-extinguishing

Color:

Signal White (RAL 9003)

Dimensions:

156 x 108 x 47 (W x H x D)

Weight:

~672 gr. (version with probe)

~553 gr. (version without probe)

Installation:

Wall-mount

Accuracy: Resolution:
Offset adjustment:

±2 °C 0,1°C (-20°C .. 144,9°C) 1°C (145°C .. 180°C) on S1: ±5.0°C

CLASSIFICATION UNDER REG. 2013.811.EC

Class: Contribution to energy efficiency:

not applicable not applicable

on S2: ±5.0°C

on S3: ±5.0°C

Installer Password: Acoustic Signal: Backlight timing: OUT2 Relay Logic:

0000 .. 9999 (default 0000) On/Off (default On) 20 sec from last keypress NOR=N.O. REV=N.C.

(default N.O.)

Contacts rating:

OUT 1 relay:

2(1)A max 250V~ (SPST) Voltage free

OUT 2 relay:

8(1)A max 250V~(SPST)

Voltage free

Alarm relay contacts rating: 4(1)A max 250V~ (SPDT)

Voltage free

Output Signal:

PWM: Amplitude:

10V ±15%

Frequency:

1KHz

Current:

15mA max.

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INSTALLATION

4 Fix the power unit base to the wall.

WARNING! The installation technician shall operate in full compliance with all the applicable technical standards in order to grant the unit safety TO INSTALL THE DEVICE, PERFORM THE FOLLOWING OPERATIONS:
1 Remove the central screw and the plastic door.
5 Fit the cover again with the electronics at the base.

2 Remove the two screws shown in the drawing, then remove the whole body from the base.

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ASSEMBLY WITH CABLE INPUT ON THE LOWER SIDE: fit the cable fasteners and/or the blocks delivered with

the unit.

3 ASSEMBLY WITH CABLE INPUT ON THE REAR PANEL: if the cable fasteners (delivered with the unit) are not required for installation, use a screwdriver to remove the base blocks permitting the cables to pass through, and fit the blocks delivered (6).

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Make the electrical connections according to the following layout and the examples on page 4 and 5.

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: reinforced insulation
WARNING! Before wiring the appliance be sure to turn the mains power off.
WARNING! S1, S2 and S3 are NTC temperature sensors. For S1 sensor the -50°C..+200°C range probe (blue cable) must be used, while the probes with the range of -50°C..+110°C (yellow cable) can be used for the other probes. The outputs OUT1, OUT2 and Alarm, are voltage free. It is advisable to fit a 10A 250V~ fuse on the power unit mains capable to intervene in case of short circuits on loads. TERMINAL BOARD GROUNDING: On the base of the control unit case is located a brass terminal board for connecting the ground protection conductors of the load devices connected to the control unit.
WIRING EXAMPLE ONLY FOR SOLAR CIRCULATORS IN ACCORDANCE WITH DIRECTIVE ErP 2015 WITH EXTERNAL PWM SIGNAL.

PWM signal (-)

230VAC power supply

NL

230V~

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EXAMPLE OF CONNECTION FOR 3-SPEED SOLAR CIRCULATORS WITH WET or “HIGH EFFICIENCY” ROTOR COMPLIANT WITH DIRECTIVE ErP 2015, WHICH DOES NOT REQUIRE AN EXTERNAL PWM SIGNAL (WITHOUT A CONNECTOR FOR PWM).

PUMP 230V~

NL 230V~

8 Fit the door again to close the power unit.

PUMP 230V~

NL 230V~

WARNING! When closing the unit please ensure that the removable wiring terminals have been inserted with the correct orientation (the terminals screws must be facing upward).
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STARTING
TURNING ON AND OFF To turn the control unit on and off, press the ` esc ‘ key for at least 3 seconds. When the control unit is turned on it will carry out a diagnosis of the internal circuitry to verify its correct operation and the red led will flash three times. If the control unit reveals no anomalies the red led will remain on, otherwise it will continue to flash quickly and the display will show the type of error.

BACKLIGHT By pressing any key the backlight of the display is activated. The backlight automatically shuts off after about 20 seconds from the last key depressure.

ACOUSTIC SIGNALS The control unit is supplied with an internal buzzer that gives
the user an acoustic feedback in case of pressure on the keys, alarms and failure. The acoustic signal can be disabled by properly setting the relevant ` Installer Parameter ‘.

TEST FUNCTION FOR LOAD WIRINGS CHECK By keeping pressed for 10 seconds the ` button, the control unit performs the functionality test of the loads connected to it, in order to allow the installer to check the wirings. The control unit checks the connected loads, depending on the configured layout, by simultaneously activating the relays outputs for about 30 seconds, while the PWM outputs will be raised at the maximum speed. The test activation is showed on the control unit by activating the TEST ‘ icon on the display.
To exit the Test mode, push the esc button at any time.

TEMPERATURE AND SPEED DISPLAY The unit will normally show on the alphanumeric display the temperature (in °C) measured by the sensors connected and the speed (in %) of the collector pump controlled with the PWM or 0..10V output.

The power on of the collector pump (Erp and/or Traditional) is

shown on the display with the icon ` ` as follows:

Icon ` ` still lit:

Erp and/or Traditional

Icon ` ` flashing slow:

pumps OFF Erp Pumps ON and

Icon ` ` flashing fast:

Traditional OFF Erp Pumps and/or

Traditional ON By pressing the keys ` or ` you can cycle through

the display of the value of the sensor or pump speed:

S_1 S_2 S_3 %PWM %010

– AUTOMATIC (Normal controller operation) In this mode the control unit automatically manages and controls the operation of the installation according to the programmed data (normal controller operation).
– ABC (Automatic Boiler Control) By pressing the ` key you can enable or disable the ABC function on the unit. When the ABC function is active, the display will turn on the icon. Following are the conditions which result in activating the collector pump: S_1TABC+Hysteresis value and S_1S_2+ Hysteresis value Following are the conditions which result in turning off the collector pump: S_1<TABC or S_1<S_2 Where: S_1: Temperature measured by the collector sensor. S_2: Temperatura measured by the boiler sensor.er. TABC: Temperature set with installer parameter P2. Hysteresis value for ABC function: 3.0°C (fixed unchangeable) The only active controls will be those relative to the maximum and safety temperatures. RESET In order to reset the device, press the key labelled as RESET ‘ located behind the removable door; DO NOT USE PINS OR NEEDLES.

AUTOMATIC / ABC (Automatic Boiler Control) OPERATION The control unit can manage the installation selected in 2 different modes:
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INSTALLER PARAMETERS To access the installer parameters press the ` key. Entering the Password The display will showPWD 0000′ with the leftmost digit flashing thus requesting for the correct password. In order to set the 4 password digits use the ` or key; by pressing the key, the current digit is confirmed and the flashing is transferred to the following digit. After confirming the last digit, the key will give access to the installer parameters. The initial password is factory set as0000’.
Modifying the Password In order to modify the stored password, first press the ` ` key, then proceed as follows:

Using installer parameters Inserting the correct Password gives access to the installer parameters change mode (SET ‘ icon lights). The first information displayed is the model of the control unit in use and the parameter P1 ‘ value. By pressing the ` or keys it is possible to scroll through the various parameters. Pressing the key takes the user to the parameter modifying mode selected. To exit the installer mode press the esc ‘ key or wait 20 seconds.
PRESS THE ` ` KEY ON THE START PAGE.

PRESS THE ` MENU ‘ KEY.

THE DISPLAY SHOWS ` PWDH0000 ‘.

THE DISPLAY SHOWS PWD 0000.

INSERT THE CURRENT PASSWORD.

ENTER THE CURRENT PASSWORD. (same procedure described above)

THE DISPLAY SHOWS THE FIRST ` INSTALLER PARAMETER ‘.

THE DISPLAY SHOWS ` PWDN0000 ‘.

INSERT THE NEW PASSWORD.

THE DISPLAY SHOWS PWDC0000.

USING THE ARROWS ` OR ` IT IS POSSIBLE TO CYCLICALLY SCROLL THROUGH THE INSTALLATION PARAMETERS:

P1: SELECTION INSTALLATION TYPE

` SCH ‘

P2: SETTING THERMAL DATA

` DATA ‘

P3: ANTIFROST PARAMETERS MANAGEMENT ` O AF ‘

P4: ACOUSTIC SIGNAL MANAGEMENT

` BEEP ‘

P5: LOGIC RELAY SELECTION

` ACT ‘

P6: INTEGRATION HOURS COUNTER

` C AH ‘

P7: LIMITATION OF COLLECTOR MINIMUM TEMP. MTL

P8: PWM and 0..10V OUTPUTS SETTINGS ERP

P9: COLLECTOR RESET TEMPERATURE

SAFE

P10: VACUUM TUBES

VTC

P11: ANTI-LEGIONELLA

LEG

INSERT NEW PASSWORD.

THE CONTROL UNIT WILL MEMORIZE THE NEW PASSWORD AND GIVE ACCESS TO THE INSTALLER
PARAMETERS.
Pressing the ` esc ‘ key at any time will exit the password management mode.
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PRESS THE ` ` KEY TO MODIFY THE SELECTED PARAMETER.

CONFIGURE DATA FOR EVERY SINGLE PARAMETER AS EXPLAINED BELOW.

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PRESS THE ` esc ‘ KEY TO RETURN TO THE INSTALLER PARAMETERS SELECTION.

WAIT 20 SECONDS OR PRESS THE ` esc ‘ KEY TO EXIT THE INSTALLER MODE.

Note: in the installer parameters mode all the outputs are disabled. All default values are to be considered as indicative, being they subject to changes due to the version and without prior notice.

P1: SELECTION INSTALLATION TYPE
Pressing the ` or keys will show all the installations that can be set up (if the probe for the selected installation has a problem or is left unconnected, that probe will flash on the display). To confirm the selected installation press the key; the control unit will memorize the choice and the display will again show the parameter list. To cancel the selection, press the esc ‘ key. In this case the control unit will abandon the changes made and will show again the parameter list. The parameters influencing the regulation of the selected setup are listed in the following and can be modified through the second installer parameter (P2).

Note: When going into parameter P1, the controller will reset the maximum temperatures (MT) detected until that moment. Furthermore, when quitting this parameter, the controller will set again the temperature display on the sensor S_1.

List of programmable thermal parameters (optional):

Parameters Description

TS1-TS2-TS3 Probe safety temperature

T 12

Differential between the probes S1-S2

MTC
MTEN TM3 TAH HY12

Adjustment of collector minimum temperature Enabling/disabling the collector minimum temperature
Maximum temperature of the probe S3 Integration temperature on the probe S3 Hysteresis of T 12

HYT

Thermostatic hysteresis

HYTS

Safety thermostatic hysteresis

CONTROL LOGIC
WARNING: The following control logics must be applied to all the diagram described hereinafter.
CONTROL LOGIC IN ABC
ABC 1/0
MANUALE T/ABC
The control logic of the `ABC’ function actually replaces the differential control. The checks on the Maximum and Safety temperatures are always kept active. The integrative source is switched off when ABC mode is active. Once ABC mode is turned off the integrative source will be automatically activated.
CONTROL LOGIC OF THE SAFETY THERMOSTATS If an alarm turns on because of an overcoming of the safety temperature, the alarm relay will be activated. While the loads outputs will keep on functioning according to the relative logics. In this conditions, the control unit emits a beeping audio signal and on the display will flash the icon ” “. The control is not active with the control unit in “OFF” mode (the display shows the message OFF).
Condition for the alarm relay activation The logic of the functioning of the alarm relay , always present in every diagram selected, runs with the following conditions: TX- TS- = Alarm relay ON TX- (TS- ­ hysteresys) = Alarm relay OFF Where: TX-: Temperature picked up by the connected sensors
(S1 .. S3). TS-: Safety temperature related to the sensors (S1 .. S3).

ALARM RELAY OFF

HYSTERESYS

ALARM RELAY ON

TS-

°C

Control logic

WARNING! The thermal parameters to be set are displayed when the relevant scheme is selected, this means the power unit will only display the thermal parameters actually activated for the selected hydraulic scheme.
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ALR RELAY
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AVAILABLE DIAGRAMS

SCH 01 Solar heating installation with 1 tank and no integrative heat source.

SCH 04 Solar heating installation with 1 tank, direct integration by means of valve logic.

Control logic

T1-2

TS1

AFR

1/0 TM3

TAF

TS3

TS2

OUT 1 OUT 1 OUT 2

Control logic

T1-2

TS1

AFR

1/0 TM3

TAF

TS3

TS2

TAH

T

SCH 02 Solar heating installation with 1 tank and additional thermostatic heating.

SCH 05 Natural circulation solar heating installation with 1 tank and direct integration by means of valve logic.

Control logic

T1-2

TS1

AFR

1/0 TM3

TAH

T

TAF

TS3

TS2

SCH 03 Pool solar heating installation.

OUT 1 OUT 2 OUT 1 OUT 2

Control logic

TAH

TAH

SCH 06 Solar heating installation with 1 tank and only 2 probe.

Control logic

T1-2

TS1

AFR

1/0 TM3

TAF

TS3

TS2

OUT 1

Control logic 9

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P2: SETTING THE THERMAL DATA
Using this parameter it is possible to set the thermal data related to the selected installation: Note: The control unit is supplied with pre-programmed thermal data for optimal operation. Any change to these values must be performed by qualified personnel only. When changing the hydraulic scheme by means of the parameter P1, the thermal values (TS, TM, TAH and TABC) already set will be reset at the default values.
AFTER SELECTING PARAMETER P2 PRESS THE ` ` KEY.

USING THE OR ` ARROWS IT IS POSSIBLE TO SCROLL CYCLICALLY THROUGH THE THERMAL DATA: – Safety temperatures – Differentials – Hysteresis of the differentials – Hysteresis of the safety thermostats – Hysteresis of the thermostats – Offset – Maximum temperatures – Integration temperature – ABC (Automatic Boiler Control) temperature

PRESS THE ` ` TO MODIFY THE THERMAL DATA SELECTED; THE DATA WILL START FLASHING.

SET THE DESIRED NUMERIC VALUE USING THE ` OR ` ARROWS.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMED SETTINGS OR PRESS THE esc ‘ KEY
TO CANCEL THE CHANGES.
In the following the regulation ranges allowed for each parameter are listed.

Probe safety temperatures

Data

Regulation range

Default

TS1

60.0 .. 240.0 °C

140.0 °C

TS2

20.0 .. 90.0 °C

80.0 °C

TS3

20.0 .. 90.0 °C

80.0 °C

WARNING! It is not possible to set the Safety Temperatures TS2 and TS3 to a value lower than the relevant Maximum Temperature, as the value of the Safety Temperature is limited to the value of the Maximum Temperature +5°C. To lower the Safety Temperature, it is first necessary to decrease the Maximum Temperature and then set the Safety Temperature to the desired value. If the Safety Temperature is displayed but the relevant Maximum Temperature is not, then the Safety Temperature will be limited according to the Maximum Temperature operating in the current scheme (i.e. in scheme no.1, the value of the TS2 safety temperature will be limited according to the value of the TM3 maximum temperature). Should the hydraulic scheme be changed and SCH5 scheme previously activated, all the Safety and Maximum temperatures will be set at the factory-set default values.

Differential between the probes S1-S2 (T12)

Data

Regulation range

Default

T12

1.0 .. 20.0°C

8.0 °C

WARNING! It is not possible to set the Differential to a value lower than the relevant hysteresis because the value of the Differential is limited to the value of the hysteresis +1°C. To lower the Differential it is first necessary to decrease the value of the hysteresis.

Hysteresis of the differential 12

Data

Regulation range

Default

HY12

1.0 .. 15.0°C

4.0 °C

WARNING! The thermal parameters to be set are displayed when the relevant scheme is selected, this means the power unit will only display the thermal parameters actually activated for the selected hydraulic scheme.

WARNING! It is not possible to set the Hysteresis (HY) to a value higher than the relevant Differential (T), because the value of the hysteresis is limited to the value of the Differential -1°C. To increase the value of the Hysteresis it is first necessary to increase the value of the Differential (T).

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Hysteresis of the safety temperatures

Data

Regulation range

Default

HYTS

1.0 .. 15.0 °C

2.0 °C

Thermostatic hysteresis

Data

Regulation range

Default

HYT

1.0 .. 15.0 °C

2.0 °C

ABC Temperature (Automatic Boiler Control) on probe S3

Data

Regulation range

Default

TABC

20.0 .. 80.0 °C

30.0 °C

Probe Offset

Data

Regulation range

Default

OS1

-5.0 .. +5.0 °C

0.0 °C

OS2

-5.0 .. +5.0 °C

0.0 °C

OS3

-5.0 .. +5.0 °C

0.0 °C

Maximum temperature of the probes S2 (TM2) o S3 (TM3)

Data

Regulation range

Default

TM2

20.0 .. 90.0 °C

70.0 °C

TM3

20.0 .. 90.0 °C

70.0 °C

WARNING! It is not possible to set the Maximum Temperature (TM) to a value higher than the relevant Safety Temperature, as the Maximum Temperature value is limited to the value of the Safety Temperature (TS) -5°C. To increase the Maximum Temperature value, it is first necessary to increase the value of the Safety Temperature.

Integration Temperature (After Heating) on probe S3

Data

Regulation range

Default

TAH

20.0 .. 90.0 °C

45.0 °C

WARNING! It is not possible to set the value of the integration temperature (TAH) at a value which is higher than the Maximum Temperature (TM3) because the value of the integration temperature (TAH) is linked to the Maximum Temperature (TM3) -5°C. In order to lower the value of the Maximum Temperature (TM3) below the value of the integration temperature (TAH) already set, first of all lower the value of the integration temperature (TAH), then change the Maximum Temperature (TM3).
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P3: ANTIFROST PARAMETER MANAGEMENT

Using this parameter it is possible to set the data managing

the antifrost function.

Data

Antifrost temperature

Regulation range

Default

The control unit is supplied with preset antifrost data

TAF

-10.0°C .. +10.0 °C

4.0 °C

for optimal operation. Any change to these values must be performed by qualified personnel only.

Collector pump `on’ time

Data

Regulation range

Default

AFTER SELECTING PARAMETER P3 PRESS THE ` ` KEY.

P OF

1 .. 60 min.

20 min.

IT IS POSSIBLE TO SCROLL CYCLICALLY THROUGH ANTIFROST DATA USING THE ` OR ` ARROWS:

– Antifrost temperature – Collector pump ignition interval

TAF ‘ P ON ‘

– Collector pump shut off interval

` P OF ‘

– Antifrost test duration

` TMR ‘

Collector pump `off’ time

Data

Regulation range

Default

P ON

5 .. 60 sec.

10 sec.

Antifrost test duration

Data

Regulation range

Default

TMR

5 .. 60 sec.

10 sec.

PRESS THE ` ` KEY TO MODIFY THE THERMAL DATA SELECTED; THE DATA WILL START FLASHING.

USE THE ` OR ` ARROWS TO SET THE DESIRED NUMERIC VALUE.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO CANCEL THE CHANGES.

BY PRESSING THE ` ` KEY AFTER MODIFYING THE DATA RELATIVE TO THE DURATION OF THE ANTIFROST TEST, THE CONTROL UNIT WILL CONFIRM
THE DATA AND WILL START THE TEST.
In the following the regulation ranges allowed for each parameter are listed.
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P4: ACOUSTIC SIGNAL MANAGEMENT
Using this parameter it is possible to enable or disable the acoustic signalling of the control unit (keyboard tones, alarms, and diagnostics).

Enable (1)/Disable (0) acoustic signal

Data

Regulation range

Default

BEEP

Off .. On

On

Note: on’ enables acoustic signalling, whileoff’ disables it.

P5: RELAY LOGIC SELECTION
Using this parameter it is possible to reverse the output logic from Normally Open (N.O.) to Normally Closed (N.C.) and vice- versa. It is only possible to modify the output logic for the relays actually active in the selected setup. Value 1′ for these parameters means that the output logic is reset to the N.O. value (default). OUT 2 is the only output for which the output logic can be changed. If the controller displaysNONE’ it means that OUT2′ is not provided for in the selected layout. AFTER SELECTING PARAMETER P5 PRESS THE ` KEY.

USING THE ` or ` ARROWS IT IS POSSIBLE TO SCROLL THROUGH THE ACTIVE OUTPUTS.

SELECT THE DESIRED OUTPUT AND PRESS THE ` ` KEY.

CHANGE THE OUTPUT LOGIC USING THE ` or ` ARROWS.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO CANCEL THE CHANGES.

Data OUT 2

Output logic for OUT 2 Regulation range 0 .. 1

Default 1

If the function is not supported by the layout selected the controller will display NONE’. Note:1′ means Normally Open (N.O.) logic, while `0′ means Normally Closed (N.C.) logic.

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P6: INTEGRATION HOURS COUNTER
Using this parameter it is possible to display the actual number of hours of the integrative source operation or reset it.
AFTER SELECTING PARAMETER P6 PRESS THE ` ` KEY.

THE DISPLAY SHOWS `H’ AND ACTUAL HOURS OF ACTIVITY OF THE INTEGRATIVE SOURCE.

PRESS THE ` KEY , THE DISPLAY SHOWSH’ FLASHING.

PRESSING THE ` KEY RESETS THE COUNTER, PRESSING THE esc ‘ AGAIN SHOWS THE CURRENT
RUNNING HOURS.
The counter recording the running hours of the integrative source can handle values up to 9999. Once the maximum value is reached the counter stops.

P7: LIMITATION OF COLLECTOR MINIMUM
TEMPERATURE The parameter Minimum Temperature Limitation’ on collector is used to manage the Minimum Temperature Thermostat used for activation of the collector pumps. This thermostat stops the pumps operation whenever on the relevant panel is measured a temperature lower than the one set in this parameter. The functionMinimum Temperature Limitation’ is not active when in ABC operation or in case the pumps activation is caused by the intervention of Recooling or similar functions.

AFTER SELECTING PARAMETER P7 PRESS THE ` ` KEY.

WITH ARROWS ` OR `, YOU CAN CYCLE AMONG

THE FOLLWOWING THERMAL DATA FOR REGULATION: – Setting of the collector minimum temperature MTC – Enabling/Disabling of the minimum

temperature limitation

MTEN

PRESS THE ` ` KEY TO MODIFY THE THERMAL DATA SELECTED; THE DATA WILL START FLASHING.

USE THE ` OR ` ARROWS TO SET THE DESIRED NUMERIC VALUE.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO CANCEL
THE CHANGES.

Adjustment of collector minimum temperature

Data

Regulation range

Default

MTC

10.0°C .. 90.0°C

10.0 °C

Enabling/disabling the collector minimum temperature

Data

Regulation range

Default

MTEN

0 .. 1

0

Note: with 0 the limitation of minimum temperature on collector is disabled, while with 1 it is enabled.

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P8: PWM and 0..10V OUTPUT SETTINGS
With this parameter you can change the settings which control the pump connected to the PWM or 0..10V output of the control unit.

Setting the connected pump functioning logic

Data

Regulation range

Default

PUMP

REV .. NOR

NOR

AFTER SELECTING PARAMETER P8 PRESS THE ` ` KEY.

WITH ARROWS ` OR `, YOU CAN CYCLE AMONG

THE FOLLWOWING THERMAL DATA FOR REGULATION:

– Type of pump connected – Operating mode logic

PUMP MODO

– Pump speed control time

TIME

– Fixed point temperature control

T_FT

In the following are listed the parameters whose default value varies depending on whether the parameter

PUMP ‘ is set to REV ‘ (PWM1 / R010V) or ` NOR ‘

(PWM2 / N010V):

– % PWM to turn the pump off

%OFF

– % PWM to turn the pump on and

drive it at maximum speed

%ON

– % PWM to drive the pump

at maximum speed – Pump flow with PWM = %ON – 0V .. 10V voltage level to turn the pump off – 0V .. 10V voltage level to turn the pump on

%MAX %FMN VOFF

and drive it at minimum speed – 0V .. 10V voltage level to drive the pump at Maximum speed with 100% flow – Pump flow with 0..10V = VON

VON
VMAX VFMN

PRESS THE ` ` KEY TO MODIFY THE THERMAL DATA SELECTED; THE DATA WILL START FLASHING.

Settings details REV’ setting PWM output: The pump connected on the PWM output works according to the “PWM1” standard, or heating logic, also said reversed’. With the PWM output at minimum value (0%) the pump runs at full speed, while with the PWM output at maximum value (100%) the pump runs at minimum speed. Of course the pump will operate to all the intermediate speeds through the modulation of the PWM signal between 0% and 100%.
0..10V output: The pump connected on the 0..10V output works according to the 0V .. 10V `reversed’ standard (R010V). With the 0V ..10V output at minimum value (0V) the pump runs at full speed, while with the 0V ..10V output at maximum value (10V) the pump runs at minimum speed. Of course the pump will operate to all the intermediate speeds through the modulation of the 0 .. 10V signal between 0V and 10V.

USE THE ` OR ` ARROWS TO SET THE DESIRED NUMERIC VALUE.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO CANCEL
THE CHANGES.

`NOR’ setting
PWM output: The pump connected on the PWM output works according

In the following the regulation ranges allowed for each to the “PWM2” standard, or solar logic, also said `normal’.

parameter are listed.

With the PWM output at minimum value (0%) the pump runs

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at minimum speed, while with the PWM output at maximum
value (100%) the pump runs at full speed. Of course the pump will operate to all the intermediate speeds through the modulation of the PWM signal between 0% and 100%.

value %MAX or VMAX, while, if it is OFF, will be equal to the set value %OFF or VOFF. If the collector pump is switched on after the intervention of the ABC function, the regulation of the pump rotation speed WILL NOT be proportional to Tr. The proportional regulation of the collector pump speed to Tr, is taking into account the functioning logic (REV or
NOR) set by the parameter ERP P8 – PUMP:

0..10V output: The pump connected on the 0..10V output works according
to the 0V .. 10V `normal’ standard (N010V). With the 0V
..10V output at minimum value (0V) the pump runs at
minimum sped, while with the 0V ..10V output at maximum
value (10V) the pump runs at full speed. Of course the pump will operate to all the intermediate speeds through the modulation of the 0 .. 10V signal between 0V and 10V.

When parameter PUMP = NOR (PWM2)

Tr < 0:

The pump takes its speed at level

%OFF or VOFF. 0 Tr < T: The pump will have a variable rotation

Tr T:

speed between %ON and %MAX or between VON and VMAX, depending on the comparison of Tr and T. The pump will have a rotation speed

equal to %MAX or VMAX.

To set the reference data, see parameter P8 – Parameters related

to PWM (PWM2) or 0..10V (N010V) output.

When parameter PUMP = REV (PWM1)

Tr < 0:

The pump takes its speed at level %OFF

or VOFF. 0 Tr T: The pump will have a variable rotation

Tr > T:

speed between %ON and %MAX or between VON and VMAX, depending on the comparison of Tr and T. The pump will have a rotation speed

equal to %MAX or VMAX.

To set the reference data, see the parameter P8 – Parameters

related to PWM (PWM1)or 0..10V (R010V) output.

MFT settings (fixed mode) The regulation of the collector pump speed is performed
referring the regulation to the temperature value T_FT (Fixed

point temperature control).

Setting the regulation mode of the PWM pump

Data

Regulation range

Default

MODO

MPT / MFT / MdT

MPT

If the temperature on the reference sensor (collector) is higher than the set value T_FT, then the collector pump speed raises until reaching the maximum value only after the `TIME’ control has elapsed.
If the temperature measured by the reference sensor (collector) is lower than the value set for T_FT, then the

Settings details
Setting MPT (differential proportional mode) The proportional regulation of the collector pump speed is performed, by confronting the measured temperature Tr (Collector Temp. – Boiler Temp.) with the temperature T set by the installer parameter P2. The sampling of the variables to control the speed of the collector pump is performed every 500 milliseconds. If the control unit is set with the ABC function activated, the collector pump speed, if it is ON, will be equal to the set

speed is decreased down to the minimum value only after the
`TIME’ control time has elapsed.
MdT settings (differential mode) The regulation of the collector pump speed is performed, by confronting the measured differential temperature Tr (Collector Temp. – Boiler Temp.) with the differential temperature T set by the installer parameter P2. If the measured differential temperature (Tr) between the collector and accumulation probes is higher than the set temperature differential (T) for the solar regulation, the

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collector pump speed raises gradually until it reaches the
maximum set speed only after the TIME ‘ period control has elapsed. If the differential temperature (Tr) measured between the reference sensors is lower than the set differential temperature (T) for the solar regulation, so the collector pump speed is reduced until the minimum set speed is reached only after the TIME ‘ period control has elapsed.
If the central unit lowers the collector pump speed until it reaches the minimum value %ON or VON and the Tr
(differential between the sensors) is still lower than the set T, so the pump turns OFF taking itself to the level %OFF
or VOFF.

Collector pump speed control time

Data

Regulation range

Default

TIME

1 .. 15 minuti

4 minuti

TIME parameter detail Sets the maximum time used to drive the pump from the minimum to maximum speed and vice versa, in order to prevent abrupt changes or oscillations in the system regulation.

Fixed mode temperature control

Data

Regulation range

Default

T_FT

0 °C .. 90 °C

60 °C

Note: this parameter is active only when the option MFT is selected under `MODE’ parameter.

In the following are listed the parameters and relevant default values

when parameter PUMP ‘ is set to REV ‘

Data

Regulation range

Default

Parameters for PWM (PWM1) output

%OFF

%ON .. 100%

100%

%ON

%MAX .. %OFF

90%

%MAX

0% .. 50%

0%

%FMN

0% .. 100%

30%

Parameters for 0..10V (R010V) output

VOFF

VON .. 10,0V

9,0V

VON

VMAX .. VOFF

9,0V

VMAX

0,0V .. 5,0V

0,0V

VFMN

0% .. 100%

30%

In the following are listed the parameters and relevant default

values when parameter PUMP ‘ is set to NOR ‘

Data

Regulation range

Default

Parameters for PWM (PWM2) output

%OFF

0% .. %ON

0%

%ON

%OFF .. %MAX

10%

%MAX

50% .. 100%

100%

%FMN

0% .. 100%

30%

Parameters for 0..10V (N010V) output

VOFF

VON .. 10,0V

9,0V

VON

VMAX .. VOFF

9,0V

VMAX

0,0V .. 5,0V

0,0V

VFMN

0% .. 100%

30%

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P9: COLLECTOR RESET TEMPERATURE
With this parameter you can set the T_SF’ temperature value used for the collector pump reset when the TS_2 safety temperature is reached, in order to avoid thermal shock and air pockets in the system. The collector pump will automatically restart only if the collector temperature measured with sensor TS_1 is below the T_SF collector reset temperature. AFTER SELECTING PARAMETER P9 PRESS THE ` KEY.

THE DISPLAY SHOWS ` T_SF ‘.

P10: VACUUM TUBES
In some solar systems, for example when vacuum tubes are installed, the collector temperature measurement could be slow, because of its non optimal position.
By enabling the function you can choose between two different operating programs: P_1 where VTC function is enabled and Boiler safety thermostats are prioritized. P_0 where VTC function is enabled and both Boiler and collector pump safety thermostats are disabled.
By enabling the VTC, the following collector pump control is started: If the collector sensor temperature increases by the amount set in the subparameter INC’ within one minute, then the collector pump will be operated for the time set in the subparameterTIME’. After the activation of the pump for the time set in the subparameter `TIME’, the function will be off for 5 minutes.

PRESS `. THE DISPLAY SHOWST_SF’ FLASHING.

PRESS ARROWS ` and ` TO SET THE DESIRED VALUE.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO CANCEL
THE CHANGES.

AFTER SELECTING PARAMETER P10 PRESS THE ` ` KEY.

WITH ARROWS ` OR `, YOU CAN CYCLE AMONG

THE FOLLWOWING DATA FOR REGULATION:

– Enable parameter

ENA

– Increase temperature

` INC ‘

– Pump activation lapse

` TIME ‘

Collector reset temperature

Data

Regulation range

Default

T_SF

OFF / 60 °C .. 180 °C

OFF

PRESS THE ` ` KEY TO MODIFY THE DATA SELECTED; THE DATA WILL START FLASHING.

USE THE ` OR `, ARROWS TO SET THE DESIRED NUMERIC VALUE.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO
CANCEL THE CHANGES.

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Enable parameter

Data

Regulation range

Default

ENA

OFF / P_1 / P_0

OFF

WARNING! By enabling parameter ENA’ inP_0′, the boiler safety thermostats are disabled and consequently the boiler temperatures could exceed the safety thresholds set.

Increase temperature

Data

Regulation range

Default

INC

1 °C/min. .. 10 °C/min. 3°C/min.

Pump activation lapse

Data

Regulation range

Default

TIME

2 sec. .. 30 sec.

5 sec.

P11: ANTI-LEGIONELLA
Through this parameter you can enable or disable the Antilegionella function. The anti-Legionella (function activated by default) consists of a boiler’s water heating cycle at 65°C every 30 days for 5 minutes (in order to carry out thermal disinfection action against the related bacteria) only in case the water in the tank has not been driven at least once at 65°C for 5 minutes without interruptions. The 30-day counter is reset whenever the water temperature in the boiler reaches 65°C at least for 5 minutes. If the water, during the heating cycle in the boiler, does not reach 65°C for 5 minutes within one hour, the control unit emits an acoustic signal and the display shows, on the hydraulic diagram, the icon of a flashing boiler. In this alarm situation, the control unit forces the water heating in the boiler and if that succeeds automatically resets the alarm. Otherwise, after entering the parameter P16 “LEG” select the sub-parameter “RS L”; the control unit exits from the alarm condition resetting the 30-day counter. The Anti-Legionella function can be enabled only for hydraulic schemes which provide additional heating: diagrams 02 (selectable in the installer parameter P1).

AFTER SELECTING PARAMETER P11 PRESS THE ` ` KEY.

WITH THE ARROWS ` OR `, YOU CAN SCROLL

CYCLICALLY THROUGH THE FOLLOWING SETTING

PARAMETERS: – Enabling the anti-legionella function

EN L

– Alarm reset

RS L

PRESS THE ` ` KEY TO ENTER SELECTED PARAMETER SETTINGS;
THE PARAMETER STARTS TO BLINK.

WITH THE ARROWS ` OR `, ENABLE / DISABLE THE SELECTED PARAMETER.

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO CANCEL
THE CHANGES.

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The setting ranges for each individual dataare listed below.

Enabling the anti-legionella function

Data

Regulation range

Default

EN L

0 .. 1

1

Note: with 0′, the function is disabled, while with1′ the function is activated.

Alarm Reset / Reset of the 30-days counter.

Data

Regulation range

Default

RS L

0 .. 1

0

Note: Selecting `1′ the control unit exits from the alarm mode, resetting the 30 days’ counter.

WARNING! – When the Anti-Legionella function is enabled, both maximum TM and safety TS temperatures, if they are lower, are automatically set to the following values:
TM-: TLEG + 5.0°C TS-: TLEG + 10°C – The temperature value of anti-Legionella is fixed to 65°C, therefore not adjustable. – The differential value is fixedto 2°C, therefore not adjustable.

FUNCTIONS ACCESSIBLE TO THE USER The functions accessible to the user are limited and do not allow setting those data influencing the installation management. The only operations allowed to the user are the following: Turning on / Turning off the control unit Enabling / Disabling ABC function in the control unit. User menu
PRESS THE ` KEY TO ACCESS USER PARAMETERS ‘.

THE FIRST ` USER PARAMETER ‘ IS SHOWN.

USING THE ` OR ` ARROWS IT IS POSSIBLE TO SCROLL CYCLICLALLY THROUGH THE USER PARAMETERS: U1: SHOWS MAXIMUM TEMPERATURES U2: ENABLES / DISABLES ANTIFROST

PRESS THE ` ` KEY TO SELECT THE DESIRED PARAMETER.

SET THE DESIRED VALUE FOR EVERY SINGLE PARAMETER AS EXPLAINED BELOW.

PRESS THE esc KEY TO RETURN TO THE USER PARAMETERS SELECTION MENU.

WAIT 20 SECONDS OR PRESS THE ` esc ‘ KEY TO QUIT THE USER MODE.

WARNING!

In the USER PARAMETERS mode all the outputs are

disabled.

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Displaying the Maximum Temperatures recorded Parameter TMAX U1 ‘ allows to display the maximum temperature recorded in the system for each probe TM-. PRESS THE ` KEY TO VIEW THE TEMPERATURE.

USING THE ` OR ` ARROWS IT IS POSSIBLE TO SCROLL CYCLICALLY THROUGH THE RECORDED TEMPERATURES:
TM1 TM2 TM3

PRESS THE ` KEY. THE DISPLAY SHOWS FLASHING THE NUMBER OF THE PROBE. PRESSING THE esc ‘ KEY RETURNS TO SHOWING THE USER PARAMETERS.

Antifrost Activation The AFR U2 ‘ parameter (anti-frost) enables or disables the antifrost function. The management of the antifrost data is performed through the user parameters. PRESS THE KEY; THE DISPLAY SHOWSAFR’ FLASHING.

USING THE ` OR ` ARROWS IT IS POSSIBLE TO ENABLE OR DISABLE THE ANTIFROST: 0: DISABLED 1: ENABLED (THE DISPLAY SHOWS )

PRESS THE ` KEY TO CONFIRM THE PROGRAMMING OR PRESS THE esc ‘ KEY TO QUIT
USER PARAMETERS.

PRESSING ` RESETS THE TEMPERATURE RECORDED TO THAT POINT; PRESSING esc ‘ RETURNS TO SHOWING THE MEMORIZED TEMPERATURE.

PRESS THE ` esc ‘ KEY TO QUIT THE MAXIMUM TEMPERATURE DISPLAY MODE.

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TROUBLESHOOTING

ANOMALY

POSSIBLE CAUSE

During normal operation the control unit displays the symbol
and emits an acoustic signal
characterized by a series of `beeps’ together with the quick flashing of the red power supply led. The probe originating the problem is flashing on the display.

The control unit has revealed an anomaly on the probe. The display shows the number of the damaged probe and the type of anomaly present.

COL OPEn S_2 OPEn S_3 OPEn

=

Probe missing, not properly wired or open (R=) – Probe is detecting a temperature lower than -31°C.

COL HIGH S_2 HIGH S_3 HIGH

=

Probe is short circuited (R = 0) or is detecting a temperature higher than 200°C.

—

=

The probe has detected a temperature included between -30°C .. -20°C

EEE

=

The probe has detected a temperature included between +180°C .. +199°C

In the selection of the installation to be realized (installer parameter P1) The probe is miswired or damaged. one or more probes flashing.

WARRANTY 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/EU as well as to the manufacturer’s document about the warranty policy. The full text of warranty is available on request from the seller.

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NOTE:

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