ENGO CONTROLS EWT100 Weather Controller For Control Temperature Heating Circuit Instruction Manual

ENGO CONTROLS EWT100 Weather Controller For Control Temperature Heating

Circuit

Product Information

Specifications

• Product Name: WT Weather Controller
• Function: Control temperature in heating circuit
• Model: EWT100

Product Usage Instructions

Installation Manual and Service Settings
Refer to the installation manual for detailed instructions on setting up the controller for optimal performance.

Hydraulic Diagrams
Review the hydraulic diagrams provided for a better understanding of the system setup, including the control of central heating circuit or floor circuit.

Installation of the Controller
Follow the step-by-step guide in the manual to properly install the controller in your heating system.

FAQ (Frequently Asked Questions)

• Q: How do I start the controller?
  

  • A: Press and hold the encoder knob for 3seconds to activate the controller. Set ‘YES’ when prompted with ‘Active regulator?’ to access the main screen.

• Q: How do I adjust settings on the controller?
  

  • A: Use the TOUCH&PLAY system by rotating and pressing the encoder. Rotate to increase or decrease values, and short press to input or approve selected parameters.

• Q: How do I exit a selected setting?
  

  • A: Press and hold the encoder for 3 seconds to exit the selected setting.

Weather controller for control temperature heating circuit

EWT100

OPERATIONS AND INSTALLATION MANUAL

SAFETY INFORMATION

Requirements concerning safety are listed in particular sections of this instruction. Apart from them it in necessary to fulfill the following requirements.

• Prior to starting the assembly, repairs or maintenance and during the execution of any connection works, it is necessary to switch off the mains supply and make sure that no terminals no electrical wires are energized.
• After deactivating the controller, terminals of the controller can be under a dangerous level of voltage.
• The controller can be utilized only in accordance with its intended use.
• Values of programmed parameters must be set in accordance with a particular building and hydraulic system.
• Controller can be assembled only by qualified installer and in accordance with currently valid standards and regulations.
• The controller is not an intrinsically safe device. It means that in case of failure it can be a source of sparks or high temperature which surrounded by ashes or flammable gases can cause fire or explosion.
• Modification of the programmed parameters should be made only by a person who read this manual.
• Use only in heat circulation system made in accordance with currently valid regulations.
• Electrical system including the controller should be protected with fuse selected in accordance with used loads.
• The controller cannot be used with damaged housing.
• Never make any modifications in controller structure.
• The controller has electronic disconnection for connected devices (operation 2.B according to PN-EN 60730-1).
• Before you open casing, first disconnect power supply from the unit.
• The controller must be installed in accordance with the requirements of EN 60335-1 standard, by qualified and authorized technician.
• Short circuit at the outputs leads to damage to the device (not output COM-NO).
• Do not operate the unit when it is malfunctioning or was repaired by unauthorized persons.
• Do not mount the unit on flammable materials.

General information
Weather controller EWT100 is designed to control the temperature in the heating circuit with the valve 3 or 4-way equipped with a drive-controlled 3-point with the possibility of connecting additional circulation pump and control the heat source through a dry contact. Main functions performed:

• weather control – the preset temperature heating circuit is determined on the basis of the programmed heating curve and the measured outside temperature,
• automatic detection season heating,
• work with a room thermostat
• controlling the heat source
• implementation of the return temperature protection (against low temperature of the return water) – protection from boiling water in the boiler (coal boiler) in the short-circuit of the boiler.

The controller is equipped with a timer (clock operation is maintained for 48 hours with the power off the controller).
Regulator is easy to operate in an intuitive manner. It may be used in households and other similar premises and in light industry facilities.

Information about documentation
The regulator manual is divided into two parts: for user and fitter. Yet, both parts contain important information, significant for safety issues, hence the user should read both parts of the manual.
We are not responsible for any damages caused by failure to observe these instructions.

Documentation storage
Please keep this operation and assembly manual and other valid documentation in a safe place for future reference. In case of moving or selling the device, hand this documentation over to a new user or owner.

Used symbols
The following graphical symbols are used in the manual:

useful information and tips,

– useful information concerning property damage, health or life threat for people or pets.

Caution: important information were labeled with the aforementioned symbols in order make the manual easier to understand. However it does not release the user nor installer from responsibility of complying with requirements which are not labeled with any symbols!

WEEE Directive 2002/96/EC
The act on electricity and electronics

• Utilize used packages and products in appropriate recycling company.
• Do not discard the product together with household waste.
• Do not burn the product.

REGULATOR INSTRUCTION MANUAL

EWT100

Operating the regulator

The controller has TOUCH&PLAY system that facilitates its operation. 3sek. Encoder is operated by its
rotating and pressing.
To start the controller, keep pressed encoder knob for 3 seconds. When the message “Active regulator?” must set YES. The screen will display the main screen. Another press will call the main menu.
Rotate the encoder TOUCH&PLAY increases or  decreases the value parameter being edited. It is the element of quick operating of the regulator. Short press the encoder to input the selected parameter or approval of the selected value.

Pressing for 3 seconds to exit the selected parameter or do not accept the selected value.

All controller settings are made through a rotary system MENU. After calling up the main menu on the screen will display a screen with icons representing the functions of the controller.

Description of display main window

1. Regulator working modes:
   • OFF mode
   • AUTO mode (work with clock),
   • COMFORT mode,
   • ECONOMY mode,
   • AUTO-ECO mode
2. temperature value: preset, current and external (weather)
3. work pump CH: ON, OFF
4. valve mixer actuator position: ON – open, OFF – closed, STOP – off.
5. working heat source (boiler switched on)
6. information from the room thermostat: No icon – the thermostat is off,
   • Heating – room temperature below the preset,
   • No heating – room temperature above the preset.
7. active SUMMER mode
8. active frost protection function
9. clock time and weekday.

Controller operation

Heat source
The controller controls the operation of heat source, e.g. an automatic gas, oil or pellet boiler, by activating or deactivating it according to a heat demand of the central heating system. Switching on and switching off the heat source may be programmed in intervals times, in the Schedule menu.

Heating circuit
The controller controls the operation of one direct heating circuit (radiators or floor) with mixing valve and circulating pump. The control heating circuit (decrease preset temperature) can be programmed in intervals times, in the Schedule menu.

The method of temperature control

• Weather control – on the basis of the signal from the external (weather) temperature sensor is calculated water temperature in the heating circuit. As a result, despite the changing external temperature room temperature in heated rooms is maintained at a preset level.
• Continuous contro l – the preset temperature of water in the heating circuit is constant at the set value, without the impact of changes in external temperature.

Preset temperature setting in Service menu (described in the manual).

User’s main menu

Main menu

Information
Work mode

• OFF
• Auto
• Comfort
• Economy
• Auto-Eco

Schedule

• Circuit
• Heat source

Summer\Winter

• SUMMER mode: OFF, ON, Auto
• Summer mode ON temp.
• Summer mode OFF temp.

General settings

• Clock
• Screen brightness
• Screen contrast
• Sound
• Language

Service settings

Work mode
This option is used to switch on the respective modes of work of the controller according to user preferences.

To change the work mode to select

Main menu → Work mode

• OFF – the controller turns off the heating circuit. The frost protection function remains active as long as it is enabled in the service menu.
  Activating this work mode also turns off the heat source. The heat source is not turns off during active function heating buffer.

• Auto – preset temperature in the room changes according to the time program. In periods of “day” is setting Preset temperature. In periods of “night” is setting (Preset temperature – Decrease of work mode).

• Comfort – preset temperature in the room is constant and corresponds to the entered value Preset temp.

• Economy – preset temperature in the room is constant and corresponds to the entered value temperature (Preset temperature – Decrease of work mode).

• Auto-Eco – preset temperature in the room changes according to the time program. In periods of “day” is set Preset temperature. In periods of “night” heating circuit is completely turns off. The frost protection function remains active as long as it is enabled in the Service menu.

Schedule
The time intervals allow the introduction of decrease preset temperature within a specified time period for the heating circuit and the turns on or turns off heat source, eg. at night or when user leave the heated rooms. As a result, the preset temperature can be lowered automatically without loss of heat comfort in the room.
Activation of time intervals in:

Main menu → Schedule
and select a time schedule for the heating circuit or heat source.
Decrease night time for the heating circuit and the work of heat sources can be defined separately for every day of the week: Monday – Sunday.

• Select the decrease of the preset temperature and the beginning and end of a given time interval.
• Working of decrease temperature in the time intervals are designated as “day” – this corresponds to the Preset temperature and “night” ****– corresponds to the Decrease of work mode.
• Action at intervals for the heat source are marked as – heat source is turned on and ****– a heat source is turned off.

In the example below, a “night” period will last from 00:00 till 06:00. “day” period will last between 06:00 – 09:00. From 15:00 to 22:00 the “day” period was entered. “night” period will last from 22:00 to 00:00.

An interval is ignored if the decrease value is set to “0”, even if its range of hours was specified.

Summer/Winter function
The SUMMER / WINTER function is responsible for the automatic or manual turns on of heating. It also allows the loading of the HUW container in the summer, without the need to heat the central heating system. Must set the parameter SUMMER mode = ON, in

Main menu → Summer/Winter → Summer mode

In SUMMER mode, all heat recipients may be OFF, therefore, make sure the boiler will not be overheated.
If the external temperature sensor is connected SUMMER function can be turned on automatically using the Auto parameter, including temperature settings for the Summer mode ON temp. and Summer mode OFF temp.

General settings
In general settings, can change the settings date, time, brightness and contrast of the screen. Can turn on and turn off the sound,  and change the language menu for the controller.

Information
The information menu allows to view information temperatures and allows to see which devices are currently enabled. By turning the encoder TOUCH&PLAY changes between successive windows of information.

Additional functions
Easier support for the user, eg. if turn off support for the heat source to all the features associated with this parameter disappear – you can then control the heating circuit. It’s the same when you turn off the heating circuit – be able to control the heat source with using a heat source contact and the heat source sensor.
There is also possible to control the heating circuit with mixing, with optional thermostat influence the heating circuit.

INSTALLATION MANUAL AND SERVICE SETTINGS

EWT100

Hydraulic diagrams

Hydraulic diagram with of the four-way valve controlling the central heating circuit or floor circuit 1

Legend

1. EWT100 controller,
2. room thermostat (No-Nc),
3. external temperature sensor (weather) type CT6-P,
4. heating circuit temperature sensor type CT10,
5. pump heating circuit,
6. four-way valve + actuator,
7. return temperature sensor type CT10,
8. heat source temperature sensor type CT10,
9. heat source with ON-OFF contact (gas and oil boiler),
10. relief valve different pressure.

RECOMMENDED SETTINGS

settings ® Kind of the system
Max. temperature| 80ºC (45ºC)| Menu® Service settings ® Heating circuit
Room thermostat| ON| Menu® Service settings ® Room thermostat
Start pump temp.| 55ºC (20ºC)| Menu® Service settings ® Heating circuit
Return sensor| ON| Menu® Service settings ® Protection

In order to improve water flow in gravitational circuit of the boiler use large nominal DN cross-sections of pipes and the four-way valve, avoid numerous elbows and cross-section reductions, apply other rules regarding construction of gravitational systems, e.g. keeping of gradients, etc. In case the return temperature sensor is mounted on the pipe – provide proper heat insulation to isolate it from the environment and improve its thermal contact with the pipe by applying of the thermal paste. The heat source preset temperature has to be high enough to ensure enough heating power for the heating circuits while heating the return water.

The presented hydraulic diagram does not replace central heating engineering design and may be used for information purposes only!

Hydraulic diagram of the three-way valve controlling the central heating circuit (with a hydraulic coupling) 2

Legend

1. EWT100 controller,
2. room thermostat (No-Nc),
3. external temperature sensor (weather) type CT6-P,
4. heating circuit temperature sensor type CT10,
5. pump heating circuit,
6. three-way valve + actuator,
7. hydraulic coupling temperature sensor type CT10,
8. heat source with ON-OFF contact (gas and oil boiler),
9. relief valve different pressure,
10. hydraulic coupling

RECOMMENDED SETTINGS

system
Max. temperature| 80ºC| Menu® Service settings ® Heating circuit
Room thermostat| ON| Menu® Service settings ® Room thermostat
Start pump temp.| 55ºC| Menu® Service settings ® Heating circuit
Cooling temp.| 92ºC| Menu® Service settings ® Heat source

The presented hydraulic diagram does not replace central heating engineering design and may be used for information purposes only!

Hydraulic diagram of the three-way valve controlling circuit underfloor heating (with a hydraulic coupling) 3

Legend

1. EWT100 controller,
2. room thermostat (No-Nc),
3. external temperature sensor (weather) type CT6-P,
4. heating circuit temperature sensor type CT10,
5. pump heating circuit,
6. three-way valve + actuator,
7. hydraulic coupling temperature sensor type CT10,
8. heat source with ON-OFF contact (gas and oil boiler),
9. relief valve different pressure,
10. hydraulic coupling.

RECOMMENDED SETTINGS

system
Max. temperature| 45ºC| Menu® Service settings ® Heating circuit
Room thermostat| ON| Menu® Service settings ® Room thermostat
Start pump temp.| 20ºC| Menu® Service settings ® Heating circuit

The presented hydraulic diagram does not replace central heating engineering design and may be used for information purposes only!

Installation of the controller

Environmental conditions
Due to the risk of fire is prohibited to use the controller in explosive gas and dust environment (eg. coal). Regulator should be separated using appropriate enclosure.
The controller is designed for operation in the environment where only dry conductive contaminations may be present (2 degree of contamination according to PN-EN 60730-1). In addition, the controller may not be used in water condensation conditions and it may not be exposed to water.

Installation requirements
The controller is designed for vertical wall-mounted installation. External circuit wires are supposed be lead on surface. Mounting hole locations are presented as in the casing.

• Before opening the unit casing, disconnect power supply. The unit installation must be done at disconnected voltage.

• Controller must be installed by qualified and authorized technician in accordance with EN 60335-1 standard. For how to open the unit casing see the picture below.

• Closing the unit casing see the picture below.

• Installations regulator on the wall is shown in the picture below.

The controller must be installed in a way that

• it is securely mounted on flat base, using all mounting points,
• degree of protection is ensured suitably to environmental conditions,
• dust and water access is prevented,
• permissible operating temperature is not exceeded for the controller,
• air exchange inside casing is allowed,
• access to dangerous parts is disabled,
• electrical installation, to which the controller is connected, must be equipped with the device that allows disconnection of both supply poles, in accordance regulations that applies to such systems.

External circuits connection

• TP – room thermostat (No-Nc),
• T1 – temperature sensor mixer heating circuit type CT10,
• T2 – external temperature sensor type CT6- P,
• T3 – return temperature sensor type CT10,
• T4 – heat source temperature sensor type CT10,
• L N PE – power supply 230V~, 50Hz,
• P – CH pump,
• SM – mixer actuator,
• S – contact to operate the heating source type ON-OFF,
• FU – time-delay subminiature fuse.
• The terminals for hazardous voltage: COM, NO, ZLo, ZN, ZLc, PN, PL, L, N.
• The terminals safe voltage: TP, T1, T2, T3, T4
• After turned on outputs: SM_OFF; SM_ON; P, on the terminals ZLo-ZN; ZLc-ZN, PL-PN giving is 230V~ voltage. After turned on output S is closed terminal COM with NO – without giving voltage.
• Detailed description of the output S included in point 12.6.

Connecting electrical system
Regulator is designed to be fed with 230V~, 50Hz voltage. Supply is connected to terminals L, N, PE.

The electrical system should be

• three core (with protective wire),
• z in accordance with applicable regulations.

Supply wires must be lead so as their contact with sensor and other low- voltage cabling is prevented, additionally, all cables may not contact surfaces with temperatures that exceed the cables operating temperature limits.

The controller has no PE protective connector, because the controller itself does not require grounding. PE terminals of the pump, mixer actuator shall be connected with PE of supply network, according to periphery instructions and regulation concerning electric systems.

Connecting mains supply 230V~ to terminals for sensors will damage the regulator and creates risk of an electric shock!.

Tips of the connected wires, especially power leads, must be secured against splitting by means of insulated clamps, in accordance with the drawing below:

Securing wire tips

• a) right,
• b) wrong.

Fixing the external wires
Electric cables external circuits are predicted for the installation of surface-mounted. A concealed external cable outlet should be provided, as well as protection against the wire being pulled out, loosened or strained, using electric cable tray. It is not allowed to leave any cable leads loose, to roll the excess wire or to bend the wires into acute angles. It is not allowed to roll the excess wire or to leave disconnected cables inside the regulator housing, as it may lead to damage to the controller.

Example how to install the cables using electric cable trays is shown in the figure below.

Connection of temperature sensors
Use only following sensor types: CT10, CT6-P. The use of other sensors is prohibited. Sensors cables could be extended by a cable with cross-sectional area ≥ 0,5 mm2, a total cable length ≤ 15 m.
Boiler temperature sensor should be installed in thermostatic pipe installed in boiler. Mixer temperature sensor should be installed in sleeve located in stream of running water in pipe, but also it can be installed on the pipe, on condition that it is thermo isolated from the environment.

Mounting temperature sensor:

• 1 – pipe,
• 2 – clamps,
• 3 – thermal insulation,
• 4 – temperature sensor.

Sensor must be protected from getting loose from the surfaces to which they are connected.

Good thermo contact should be maintained between sensors and measured surface. To this purpose thermoleading paste should be used. It is not acceptable to lubricate sensors with water or oil. Wires of sensors should be separated from network electrical wires. In such a case wrong readings of temperature may be shown. Minimum length between those wires should be 10cm. It is not acceptable to allow for contact between wires of the sensors and hot parts of the boiler and heating installation. Wires of the sensors are resistant to temperature not exceeding 100ºC.

From the regulator can also be formed to correct an error reading from temperature sensors: circuit heating, external, return and boiler to the nearest 0,1°C.

The value correction set in
Service settings → Temperature correction

Connecting weather sensor (external)

• The regulator cooperates only with a weather sensor of the CT6-P type. The sensor should be installed on the coldest wall of the building, usually this is the northern wall, under a roof. The sensor should not be exposed to direct sunlight and rain. The sensor should be fitted at least 2 m above the ground, far from windows, chimneys and other heat sources which could disturb the temperature measurement (at least 1,5 m).
• Connect the sensor using cable of 0,5 mm2 cross-section, up to 25 m long. Polarity of the leads is insignificant. Connect the other end of the cable to the regulator.
• Attach the sensor to the wall using tack bolts. To access the tack bolts holes, unscrew the sensor lid.

Temperature sensor checking
Temperature sensors CT10, CT6-P can be checked by measuring their resistance in given temperature. In case of big differences between measured resistance value and values in table below, the sensor should be replaced with a new one.

CT10

Weather temp. [°C]| Value [Ω]
0| 32 554
10| 19 872
20| 12 488
25| 10000
30| 8059
40| 5330
50| 3605
60| 2490
70| 1753
80| 1256
90| 915
100| 677
CT6-P (weather)

Weather temp. [°C]| Value [Ω]
-25| 901,9
-20| 921,6
-10| 960,9
0| 1000,0
25| 1097,3
50| 1194,0
100| 1385,0
125| 1479,4
150| 1573,1

Connecting a room thermostat
Room thermostat (No-Nc) connected to the control affects the heating circuit.
The thermostat after contact opening reduces the preset temperature heating circuit about the service value Decrease of thermostat or can turn off the pump in the parameter Off by thermostat. The values of the parameters must be chosen so that when of working the room thermostat (contact opening) the temperature in the room dropped.

Connecting a heat source
COM-NO terminals are used to connect the contact heat source (no voltage) that turns on and off the heat source. The heat source can be automatic boiler gas or oil, which has a contact ON-OFF. Terminals COM-NO does not have galvanic isolation of 230V ~ and can therefore only serve to disconnect circuit voltage of 230V ~. Use separate relay in the event of having to disconnect circuits at low voltage.

• Risk of electric shock caused by current from a heat source. Disconnect the controller and heat source electrical supply and make sure there is no dangerous voltage on terminals.
• Protect yourself against incidental generation of supply voltage!
• Connection to heat source (gas or oil boiler) should be done by a qualified installer, according to technical data of this boiler.

SERVICE MENU

Entrance to the service menu : Password → [0000] → OK

Services settings

Heating circuit
Heat source
Protection
Room thermostat
Temperature correction

• T1 Circuit sensor
• T2 External sensor
• T3 Return sensor
• T4 Boiler sensor

External sensor
Manual control
Screed drying

• Active
• Program selection: P1-P7

Restore defaults settings
Heating circuit

Support
Kind of the system

• Radiators system
• Underfloor heating

Control method

• Weather control
• Continuous control

Weather control *

• Heating curve
• Curve parallel move

Preset temperature
Decrease of work mode
Decrease of thermostat
OFF by thermostat
Start pump temp.
Min. temperature
Max. temperature
Valve full opening time
Valve input dead zone
Valve dynamic
Valv delay
Heat source

Support
Histeresis
Min. temperature
Max. temperature
Buffer
Buffer preset temp.*
HW priority
Cooling temp.
Increrase temp.
Protection

Return sensor
Min. temperature
Histeresis
Closing the valve
Frost protection
Frost protection delay
Frost protection temp.*

not available when not connected the corresponding sensor, the parameter is hidden or is not appropriate settings in the menu.

Services settings

Heating circuit

Support| ON or OFF supporting the heating circuit (radiators or underfloor) by the

controller.

---|---
Kind of the system| Selecting the type of heating installation: Radiators system or Underfloor heating.
Control method|

• Weather control – preset temperature of water circulating in the heating circuit reference is with regard to indications external temperature sensor. The parameter is invisible when not connected external temperature sensor. When the external temperature sensor is defective or not connected will automatically change the Control method on Continous control.
• Continous control – maintain is a constant preset temperature of circulating water.

Weather control| Heating circuit control depending on external temperature (weather). The parameters available when choosing a the Control method = Weather control.

• Heating curve – choice in the form of a graph of the heating curve, in range of 10..42ºC, appropriate for the type of building. The higher heating curve the higher the temperature of the water in the heating circuit.
• Curve parallel move – parameter enables to readjust the heating curve.

Preset temperature|

• When _ Control method = Continous control _then the heat source is turned off when you reach the Preset temperature. When the temperature falls to the heat source is turned on again. This parameter is not available when
• Control method = Weather control.

Decrease of work mode| When the Control method = Continous control , decrease the preset temperature water in circulation during the Economic mode and Auto mode and during operation time schedule. In other modes temperature water circuit remains constant.
Decrease of thermostat| This parameter can be used only when Room thermostat = ON. Exceeding a preset room temperature causes decreasing preset temperature of water in the heating circuit by Decrease of thermostat value. Decreasing the preset temperature takes place upon contact trips the thermostat. Preset temperature of water inside the heating circuit is not changed if Decrease of thermostat = 0. Parameter disappears when Room thermostat = OFF.
OFF by thermostat| Stopping the flow of water in heating circuit by turning off the CH pump

when the starting thermostat contact.

Start pump temp.| Above this parameter followed the inclusion of the circulating pump and

the opening of the valve actuator circuit regulated.

Min. temperature| The minimum preset temperature of water in the heating circuit.
Max. temperature| The maximum preset temperature of water in the heating circuit.
Valve full opening time| Read valve full opening time from a servo housing, e.g. It is usually located on a servo nameplate and within a range of 90 – 180s.
Valve input dead zone| Parameter setting defining a temperature dead zone for the heating circuit. The controller controls a servo in such way that the temperature measured by a circuit sensor is equal to a preset value. Nevertheless in order to avoid frequent servo movements which can shorten its life, adjustment is

carried out only when the measured water temperature is lower or higher than the mixer dead zone.

Valve dynamic| The reaction time of the valve actuator to position change. Amplification

of the valve control algorithm.

Valve delay| The mixer valve actuator moved only after this time.

Heat source

preset temperature of water – Hysteresis. The heat source is turns off at the preset temperature of water + Hysteresis.
Min. temperature| The minimum temperature of the heat source and the same minimum temperature for the heating circuit.
Max. temperature| The maximum temperature of the heat source and the same maximum temperature for the heating circuit.
Buffer| Buffer support

• No – heating circuit is operating, but the heat source is not heated up despite the heat source preset temperature drop.
• Yes – the heating circuit operation is off, the heat source operates independently in order to increase its temperature to the Buffer preset temperature value.

Buffer preset temp.| Temperature for the heat source, when the buffer support is turned on.
Cooling temp.| Temperature value at which heat excess is discharged to the heating circuit. It is protection against overheating.
HW priority|

• ON – When the temperature of the heat source is lower than the Min. temperature for the circuit, the controller lowers the circuit preset temperature, but only when there is no active reduction from the operation mode.
• OFF – the regulator does not reduce the circuit preset temperature.

Increase temp.| Increase of the heat source preset temperature above the heating circuit preset temperature.

Protection

Return sensor| Turns on or off support of the return temperature sensor. Enabling the sensor support shows additional parameters related with the function of protecting the boiler return from cold water. It is realized through a mixing valve with an electric actuator. Note: Do not turn sensor support if there is no electric actuator mounted on the valve! This function is not available when the return sensor is not connected or its support is disabled.

Function activation results in valve closing.

---|---
Min. temperature| The temperature below which the electric actuator turn a blind mixing

valve.

Hysteresis| Electric actuator will return to normal working at return temperature ≥ Min. temperature + Hysteresis.
Closing the valve| It is % opening to the mixing valve during active the return protection function. Note: The valve closes with an accuracy of +-1%.
Frost protection| ON or OFF frost protection function.
Frost protection delay| Time delay for enable frost protection function. Description later in this

manual.

Frost protection temp.| The temperature below which the frost protection function is activated .

Description later in this manual.

Other parameters

temperature sensor: T1 – heating

circuit, T2 – external, T3 – return, T4 – boiler.

External sensor| Enable support external temperature sensor (weather) for controlling the heating circuit. In the event of external sensor damage on the screen displays the message ” Damage sensor external temperature “. Enabling

support cause additional parameters in the menu to the weather control.

Manual control| Manually turn ON or OFF working CH pump, mixer actuator, contact the heat source in order to control the correctness of their actions.

Note: The long time activation of the pump – can be damaged this pump.

Screed drying| Activating or Deactivating the screed floor drying function (heating by floor circuit). Drying is performed by a corresponding change in floor circuit temperature in the range 10..50ºC in a function of 30 days. Schedule of temperature changes in time is shown on the screen in the form of graphs appropriate for programs P1..P7. Select the correct program for the used

type of screed and environmental conditions.

Restore defaults settings| Selecting YES will reload all the factory settings.

Function

Prompts
The controller reports on the main screen prompts alarm indicating the status of the controller and damage the sensors, so that the user can take appropriate steps to eliminate damage or preventing a hazardous situation.

Reported by the controller prompts are

1. Damage heating circuit sensor temperature.
2. Damage sensor external temperature.
3. Damage sensor return temperature.
4. Damage sensor heat source temperature.
5. Frost protection active!.
6. Cooling boiler!.

Heating circuit

Settings for heating circuit without weather sensor.
Should disable the external temperature sensor in the External sensor from the service menu and then It is necessary to manually set the required water temperature in the heating mixer circuit using parameter Preset mixer temp., e.g. at a value of 50°C. The value should allow to obtain the required room temperature. After connecting room thermostat, it is necessary to set a value of decrease in preset temperature by thermostat (parameters Decrease of thermostat) e.g. at 5°C. This value should be selected by trial and error. The room thermostat can be a traditional thermostat (No-Nc). Upon activation of the thermostat, the preset mixer circuit temperature will be decreased, which, if proper decrease value is selected, will stop growth of temperature in the heated room.

Settings for heating circuit with weather sensor.

• Shouldn’t disable the external temperature sensor in the External sensor from the service menu.
• Using parameter Curve parallel move, set preset room temperature following the formula: Preset room temperature = 20°C + Curve parallel move.
• In this setup, it is possible to connect a room thermostat which will equalize the inaccuracy of selecting heating curve, if the selected heating curve value is too high. In such case, it is necessary to set the value of parameter Decrease by thermostat, e.g. at 2°C. After opening of the thermostat contacts, the preset mixer circuit temperature will be decreased, which, if proper decrease value is selected, will stop growth of temperature in the heated room.

Weather control.
For the heating circuit can be turned on weather control, which requires the connection of external temperature sensor. It should enable the external temperature sensor by setting
Service settings → External sensor = ON – cause additional menu Weather control. The heating circuit water preset temperature is calculated basing on the temperature prevailing outside the building. The colder it is outside, the higher water temperature in the heating circuit is. This relation is shown in the controller in the form of heating curve.

The heating curve can be changed in a graph from the system menu, within the range for the weather preset temperature. It is a reflection of the thermal characteristics of the building. If the building is less insulated then the heating curve should be greater. Heating curve should be selected experimentally by changing it in a few day intervals. During trial and error selection of appropriate heating curve, it is necessary to exclude influence of the room thermostat on regulator operation (regardless of whether the room thermostat is connected or not), by setting the parameter: Service settings → Room thermostat = OFF.

After choosing the proper heating curve, the circuit preset temperature is calculated according to the outside temperature. As a result if the heating curve is appropriate for the building, the room temperature remains constant regardless of the temperature outside.

The regulator introduced value for the heating curve for underfloor heating

and radiators system

Guidelines for selecting a proper heating curve

• if at dropping external temperature, room temperature increases, the selected heating curve is too high,
• if at dropping external temperature, room temperature also drops, the selected heating curve is too low,
• if during frost, room temperature is proper and too low when the weather is warmer, it is recommended to increase heating curve parallel shift and decrease the heating curve,
• if during frost, room temperature is too low and too high when the weather is warmer, it is recommended to decrease heating curve parallel shift and increase the heating curve. Poorly warmed buildings require setting higher heating curves. Whereas for well heating buildings, heating curve will have a smaller value.

The regulator can increase or decrease the preset temperature, calculated in accordance with the heating curve, if it exceeds the temperature range for the given circuit set in parameters Min. temperature and Max. temperature.

Frost protection
Frost protection function is applicable only to active controller work modes: OFF or AUTO-ECO. In AUTO-ECO mode, this function is executed only during a night time decrease. The function is activated in the menu: Services settings → Protection → Frost protection

Description of frost protection against the external temperature sensor readings.
When the external temperature drops below 3°C, an Frost protection delay, e.g. 4h must expire. If after this time the external temperature is still under 3°C, a heating circuit pump will be activated for 30 minutes. After 30 minutes temperature on the mixer sensor will be checked and if the temperature is lower than 13°C to preset temperature heat source is set to Frost protection temp. value. Turning off the pump and the heat source will take place only after the external temperature rises above 3°C. The pump circuit is also activated when there is a risk of freezing circuit.

Adjustable circuit.
When the external temperature drops below 3°C, an Frost protection delay, e.g. 4h must expire. If after that time the external temperature does not rise above 3°C the heating circuit pump will turn on for the duration of 15 minutes. After 15 minutes, water temperature in the circuit will be checked. If it is higher than 13 °C, the pump will be stopped. If it is lower than 13 °C, the pump will continue its operation and heating circuit will be heated by a heat source up to a Frost protection temp. value. The pump will be stopped unless the external temperature exceeds 3°C.

If the heating circuit must be turned on during this period, instead of off the controller must be activated for the heating circuit working mode: OFF or AUTO-ECO.

During a risk of frost, do not connect the controller from the mains supply.

Power stoppage
In case of power stoppage the controller returns to operation mode in which it was before stoppage.

Prevention cooling
The function tries to cool down the heat source before switching the regulator into the alarm state of overheat of the heat source.

Pump anti standstill function
The controller performs the function of protecting pump from anti standstill. It involves the periodic switching (which 167h for a few seconds). This protects the pump against immobilization due to scaling. Therefore, during a break in the use of the controller, the controller power supply should be connected.

Fuse replacement

• Cut off power supply to the controller before fuse replacement.
• Use 1.25A time-delay subminiature fuse with minimum interrupting current of 100A should be used, as per IEC 60127 standard.
• To replace open controller’s enclosure and replace burnt fuse with a new one.

Storage and transport conditions
The controller cannot be exposed to immediate effects of atmospheric conditions i.e. rain or sunrays. Temperature of storage should be within scope 0…65ºC.

Technical data

Output current Pump

Mixer actuator ON : Mixer actuator OFF: Heat source contact:

|

• 1,5(1,5)A/230V
• 0,5(0,5)A/230V
• 0,5(0,5)A/230V
• 0,5(0,5)A/230V

Controller’s level of protection| IP20
Outer temperature| 0…40°C
Storage temperature| 0…65°C, without direct sunlight
Relative humidity| 10 – 90%, without steam condensation
Measuring inputs, temperature (low voltage)|

• T1 – mixer temp.
• T2 – external temp.
• T3 – return temp.
• T4 – heat source temp.
• T –room thermostat input

Measuring scope of sensors’ temperature CT10| 0..100°C
Measuring scope of sensors’ temperature CT6-P| -35..40°C
Accuracy of measuring temperature with sensors CT10 and CT6-P| ±2°C
Clamps for network and signal| Screw clamps, wire profile up to 2,5mm2 , tighten moment 0,4Nm, isolation length 6mm
Display| Graphic 128×64
Dimensions| 140x99x43 mm
Weight| 280g
Norms| PN-EN 60730-2-9

PN-EN 60730-1

Software class| A
Mounting| on the wall

Ver. 1
Release date : VII 2024

Producer

• Engo Controls S.C.
• 43-262 Kobielice
• 4 Rolna St.
• Poland

Distributor

• QL CONTROLS Sp z o.o. Sp. k. 43-262 Kobielice
• 4 Rolna St.
• Poland
• www.engocontrols.com

References

• ENGO Controls - Sterowanie ogrzewaniem

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