Dane techniczne regulatora MIRECO SL

Here is the detailed description of the MIRECO SL regulator (for the full instruction click the right mouse button here, about 1 Megabyte)

Basic data for MIRECO SL regulator:
- practical fuel saving 15 to 25 %
- 3 heater circuits 1 hot water circuit
- heating curve regulation or indoor temperature regulation, with installation protection,
- very easy operating, context window menu, system component visualisation
- Automatic recognition of all holidays, inclusive Easter and Corpus Christi.
- Automatic change of the summer/winter time.
- Automatic circuit shut off depending of the average day temperature (programmable temperature and length of the averaging)
- Active installation check
- Local temperature sensors with momentary correction
- Overheating protection for coal boilers
- Antifreeze protection
- Help available for all functions

MIRECO SL regulator follows the popular MIRECO S – we have expanded several functions which are useful in typical applications. The regulator is designed for controlling small heating installations, especially in detached houses (we do not advise the regulator for large heating installations). It’s a continuation of the well known group of MIRECO regulators which have been produced in hundreds since the early 90s annually. The steering algorithms used for it have been constructed on the basis of experience from more than three thousand different size central heating installations and they are easy to use, efficient and they save energy.

The regulator is able to steer a boiler equipped with atmospheric, one-stage or two-stage fan, gas or oil burner. The heating installation may have 1, 2 or 3 central heating circuits (with rotary valves) and hot water circuit.

MIRECO SL may control one, two or three rotary valves in a maximal economic and safe boiler temperature way. It is safe because the regulator does not allow condensation of water in the boiler which may cause corrosion and faster exploitation of boiler, or settling of carbon deposit which worsen the efficiency of boiler with oil burner.
MIRECO SL regulator allows also to steer hot water preparation, using the capacity heater or outside exchanger container. Several heating modes of central water system serve different needs, for example for gastronomy purpose (large usage of water).

The latest version of the regulator may define different configurations of heating installation, taking into consideration all the types of boilers (among others: gas condensation boilers as well as coal boilers with so called “temperature drop”).

We have also added the function of heating circuit automatic turn-off dependent on the outside temperature together with turning off the pumps, as well as the function of installation work control through monitoring of temperature circuits and alarming in case of underheating danger. MIRECO SL cooperates with CreaBUS bus – thanks to which it’s possible to develop installation by joining additional modules and correctors easily. It’s possible to use indoor thermostats with correction for each circuit. Thanks to integration with CreaBUS system you may steer remotely and monitor the work of regulator using other elements of CreaBUS system.

    The most important feature of MIRECO SL regulator is user-friendly communication, which is seen at first look at the regulator. Instead of control system or text description, we used plain graphic system which is intelligible even for a complete layman – we have sketched symbolic heating installation on the front plate. You may see each steered element of the installation which is enlightened with a LED or not. It’s enough to have a look at the front plate to see everything.

     We have also used a very convenient way of programming based on the popular windows idea. The windows lead the user to chosen function. Each window has Polish description (the mechanism has big legible LCD display, 4 lines with 20 signs in each line and with light for using in dark rooms), there are Polish letters, and the keyboard has only 5 keys. Moreover, one key has stable function HELP available at all times. Another one (described as FUNCTION) has the function of changing windows, that is showing next positions on the screen. The rest three buttons are used for convenient function choice due to the description on the screen. And the description is so legible that you probably do not need to read the instruction...

    What’s absolutely new in the MIRECO SL regulator is the function of defining shortcut keys, similar to soft key function known from mobile phones. The user may decide himself which functions he will use frequently. The functions will be displayed on top positions of the main menu. Thus, it’s not necessary to go through all windows to get to the functions, you only need to press the key once.

The regulator is produced in two nearly identical versions: for a wall mounting or for a panel. Working and using of both versions are identical; the versions differ only in the size of front plate and display of the FUNCTION key, HELP key and the DAMAGE control.

    Thanks to the descriptive windows system you may use the regulator even without the instruction. You may see everything on the screen.....

        Shortened working principle of MIRECO SL regulator.

    MIRECO SL regulator may be used to steer central heating installations and to prepare hot water in different configurations, with the help of rotary valves or without. Particular configurations are set conveniently in service functions for the installation.

    You may choose one of 9 possible configurations (simpler schemes of the installation are in the service functions chapter):

1. One heating circuit without rotary valve (indoor regulation option and circulation pump steering),
2. One heating circuit without rotary valve (indoor regulation option and circulation pump steering) and hot water circuit (pumps are steering non simultaneously),
3. One heating circuit with rotary valve (indoor regulation option),
4. One heating circuit with rotary valve (indoor regulation option) and hot water circuit ,
5. Two heating circuits, rotary valve only in circuit 1 (option indoor temperature regulation), circuit 2 without rotary valve with higher temperature,
6. Two heating circuits with rotary valves, both with option indoor regulation, circuit 2 steered by enhancement module,
7. Two heating circuits with rotary valves, both with option indoor regulation, circuit 2 steered by enhancement module, and hot water circuit.
8. Three heating circuits with rotary valves, all with option indoor regulation, circuit 2 and 3 steered by enhancement module,
9. Three heating circuits with rotary valves, all with option indoor regulation, circuit 2 and 3 steered by enhancement module, and hot water.

    Central heating circuits may be steered with rotary valves. The solution is a bit more expensive than the installation with changing valve but it allows full and fluent regulation of the central heating temperature without characteristic limitation of the bottom temperature value which is required by all modern high-duty central heating boilers (with the exception of condensation boilers). Maintenance of the requirements lets us avoid fast usage of boilers because of the corrosion caused by condensation of water or settling carbon deposit and soot hard to remove. Besides, in case of iron boilers, rapid changes of temperature are often a cause of cracks or weak seal of the boiler. Thus, using rotary valves, though apparent higher costs, gives better durability of the installation and the possibility of unrestricted lowering of heating circuit temperature, which means maximal economy. And it means lowering of the exploitation costs.

    Second central heating circuit may be used, for example, in case of merging floor heating with classic heater. The possibility of separating different areas allows to heat the building comfortably and economically. Moreover, for each heating circuit there is a min and max temperature of the heating element, which prevents possible freezing of the installation or overheating of the floor.

Third central heating circuit is used to heat the bathroom floor. The function is especially appreciated by parents of young children who adore playing in the bath... and you do not need to heat all the big building.

For the low-temperature resistant boilers (for example condensation boilers), there is a possibility of steering one heating circuit without using the rotary valve. You may also combine the circuit with heating the hot water system (alternate pumps work or switch valve). However, you need to remember that the best steering effects, even for condensation boilers, are obtained by using rotary valves. Connecting the second or third central heating circuits needs equipping the installation with rotary valves.

Preparation of the central water system in all configurations needs the easiest and most efficient method that is controlling the charge pump (heating coil circuit in bunker or exchanger circuit). Boiler temperature is adjusted to needs, also to the hot water request. When the temperature should be higher than the one required for the central heating circuit, the rotary valve reduces the temperature properly and allows the central heating system to work without troublesome breaks or unnecessary overheating. Obviously, you may turn off the central water system when necessary. For the installation which does not use the rotary valves during working of the central water system there is a circuit pump of central heating turned on – in this way we avoid unnecessary overheating of the building.

    MIRECO SL regulator allows the central heating circuit regulation according to two algorithms (to choose): so called weather algorithm or modified regulation of indoor gauge. The weather algorithm computes the heaters temperature on the basis of so called heating curve, outside temperature and programmed inside temperature. The curve should be defined on the basis of the building construction or empirically observing heating in different outside temperatures.
More user-convenient algorithm is the modified algorithm of indoor temperature regulation. The sensor, placed in a chosen representative room, observes all inside temperature changes. The regulator steers the heaters temperature in order to bring the temperature in rooms close to the programmed one. When it’s too cold (or when the night lowering finishes) the heaters temperature gets a lot higher (with the restriction resulting from the outside temperature, thus similarly to weather method) in order to heat the room as quickly as possible. Whereas, when the room temperature falls the heating is turned off until new lower temperature.

Indoor regulation algorithm has one more virtue. It takes into consideration additional heat of the sun and indoor heat sources like kitchen or other electric equipment. When the rooms (especially the ones with a lot of windows) are additionally heated, then the heaters temperature is reduced. It’s seriously economical. Similarly, when the building is acutely cooled because of strong wind, for example, then the heaters will be warmer. Thanks to additional coupling from the outside temperature, the system is resistant to room airing, for example, and does not allow to overheat the central heating installation. The temperatures in particular circuits (that is central heating and hot water preparation) are defined on the basis of so called heating programs. The programs (there are 6 of them) define the time range and the room temperature or the hot water temperature. Detailed programs working and their usage are described in following chapters.

    Full instruction (40 pages, pictures, schemes, about 1 Megabyte, but today only in Polish) may be downloaded here – click the right mouse button in order to download or left one in order to open.