Heat energy control unit. Local heating systems control units

The share of heating costs is predominant in utility bills throughout our country. At the same time, in the northern regions, as well as where imported fuel oil is used as fuel, thermal energy is especially expensive. For this reason, the issue of economical consumption and reasonable consumption of heat energy is one of the most urgent today.
As you know, savings start with accounting. Today, meters of heat energy supplied to an apartment building are installed almost everywhere. Statistics show that this simple measure has reduced heating costs by 20, and sometimes even 30%. But this is not enough, you need to move on and the vector of this movement should be directed towards apartment heat metering and a decrease in energy consumption, depending on the decrease in demand for it.
To do this, it will be necessary to reconstruct the elevator input and install a control unit for the heat supply system with automatic regulation of its operation depending on the outside air temperature. It is also necessary to install pumps with frequency regulation of their work. Most efficient system will be when installed on each heating radiator a temperature control sensor and a meter for metering the consumption of thermal energy.
Of course, this will require cash, which, according to preliminary calculations, should pay off within two years of system operation. You can use funds from federal program increase the efficiency of energy resources use, take out a loan and repay it at the expense of monthly receipts of money from tenants, highlighting separately the column of expenses for the reconstruction of the heating system. You can simply "chip in" and thereby stop throwing your own money into environment together with wasted heat energy.
The main thing is to understand that the heating system existing today, especially during the off-season, is like a fire on the balcony: it heats up, just not what is needed.

Perfect option
The ideal heating system for the consumer is a heating network that automatically maintains the set temperature in each room. At the same time, for residents, the motivation for installing and using it should be not only comfortable living conditions (you can simply adjust the temperature by opening balcony door or a window to the street), but also a reduction in heating bills.
This requires an apartment-based thermal energy consumption metering system. Sales companies insist that in our country, with its traditional vertical distribution of the heating system, it is impossible to install a heat meter for each apartment, but at the same time it is overlooked (or there is simply no desire to see and take into account) that heat meters can be installed on each heating radiator, while not changing the two-pipe or one-pipe vertical heat distribution to horizontal.
When calculating for heat, it is enough to sum up the readings of all meters. Even an elementary school student can handle this.
Individual metering of heat energy will allow you to consciously save heat, I stop supplying it to those rooms where no one temporarily lives or simply preferring to be in a cool room. To do this, you can turn off the taps installed on each radiator.
But there is another way to regulate heat consumption: the use of a radiator thermostat, consisting of a valve and a thermostatic head. The principle of operation of the system is simple: the movement of the valve embedded in the pipe controls thermostatic head that reacts to changes in room temperature: hot, the valve closes the pipe, cold, on the contrary, opens. At the same time, using manual control, you can configure the device as you wish: if you like it to be hot, set the maximum temperature on the regulator that you want to get in the room.
There are thermostats with which you can adjust the temperature in the room depending on the time of day: during the day there is no one at home, the heating can be turned off, turned on in the evening.
It would seem that everything is simple: meters can be installed in every apartment, the amount of heat energy can be increased or decreased, and heating costs can be saved. But at the same time, the system for regulating the distribution of heat energy throughout the house is overlooked, that is, the traditional elevator input.

The principle of operation of the hydraulic elevator
The coolant is supplied to the hydraulic elevator from the main pipeline. Its pressure is regulated using a conventional valve. At the same time, the temperature of the supply water is so high that it cannot be supplied directly to consumers, therefore, the supply water in the hydraulic elevator is mixed with the already cooled return flow.
If the coolant makes a cycle of movement through the heating system and does not consume the heat energy, which will certainly happen when the heating devices are turned off, hot water from the network and hot water from the return pipeline will enter the elevator.
The hydraulic elevator has no feedback with the main pipeline and cannot reduce the pressure of the network water. As a result, too hot water will be sent to consumers whose heating devices are not shut off and are operating at full capacity, which will lead to damage to the equipment.
At the same time, the heat metering device will not record a decrease in heat consumption, and the sales company will note overheating and impose penalties. It turns out that all efforts to reduce heating costs were made in vain.

What to do
We need a heating station with automatic system regulation of the supply of network water

1. Hydroelevator
2. Electric drive
3. Control system
4. Temperature sensor
5. Temperature sensor of the heating agent in the supply pipe
6. Temperature sensor of the heating agent in the return pipe

It uses a heat exchanger that mixes mains water and mains water. V heating system it is this "mixture" that is served. Its temperature is measured and when the permissible value is exceeded, the main water supply is shut off, which leads to a decrease in the consumption of thermal energy.
As a result, the consumption of thermal energy can be controlled.

The automated control unit of the heating system is a type of individual heating point and is designed to control the parameters of the coolant in the heating system, depending on the outside air temperature and the operating conditions of buildings.

The unit consists of a corrective pump, an electronic temperature controller that maintains the set temperature graph and differential pressure and flow controllers. Structurally, these are pipeline blocks mounted on a metal support frame, including a pump, control valves, elements of electric drives and automation, instrumentation, filters, mud collectors.

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Automated heating system control unit

Specifications

No. type AUU	Q, Gcal / h	G, t / h	Length, mm	Width, mm	Height, mm	Weight, kg
1	0,15	3,8	1730	690	1346	410
2	0,30	7,5	1730	710	1346	420
3	0,45	11,25	2020	750	1385	445
4	0,60	15	2020	750	1425	585
5	0,75	18,75	2020	750	1425	590
6	0,90	22,5	2020	800	1425	595
7	1,05	26,25	2020	800	1425	600
8	1,20	30	2500	950	1495	665
9	1,35	33,75	2500	950	1495	665
10	1,50	37,5	2500	950	1495	665

In the automated control unit of the heating system, regulating elements from Danfoss are installed, and the pump is from Grundfoss. The control units are completed taking into account the recommendations of Danfoss specialists, who provide consulting services in the development of these units.

The node works as follows. When conditions occur when the temperature in the heating network exceeds the required one, the electronic regulator turns on the pump, and the pump adds to the heating system as much cooled heat carrier from the return pipeline as is necessary to maintain the set temperature. The hydraulic water regulator, in turn, is covered, reducing the supply of heating water.

The operating mode of the automated control unit for the heating system in winter is round-the-clock, the temperature is maintained in accordance with the temperature schedule with temperature correction return water.

At the request of the customer, a mode can be provided for reducing the temperature in heated rooms at night, on weekends and holidays, which gives significant savings.

Reducing the air temperature in residential buildings at night by 2-3 ° C does not worsen the sanitary and hygienic conditions and at the same time gives savings of 4-5%. In industrial and administrative-public buildings, heat savings due to temperature reduction during non-working hours is achieved to an even greater extent. The temperature during non-working hours can be maintained at the level of 10-12 ° C. The total heat savings with automatic regulation can be up to 25% of the annual consumption. During the summer period, the automated unit does not work.

The plant produces automated control units of the heating system, their installation, commissioning, warranty and service maintenance.

Energy saving is especially important because it is with the introduction of energy-efficient measures that the consumer achieves maximum savings.

We are always open to participate in solving your problems related to our subject matter and are ready to cooperate with you in any form, up to the departure of our specialists.

Errors in the implementation of an automatic node
Additional requirements when putting the heating control unit into operation
Efficient use of automated heating control unit

An automated control unit is a set of equipment and devices designed to provide automatic regulation of the temperature and flow rate of the coolant, which is carried out at the input of each building in accordance with the temperature schedule required for a particular building. Adjustment can also be made in accordance with the needs of the residents.

Water heater piping assembly.

Among the advantages of AUU, if we compare it with elevator and heating units, which have a fixed cross-section of the bore, is the possibility of varying the amount of the coolant, which depends on the temperature of the water in the return and supply pipelines.

An automated control unit is usually installed one on the entire building, which distinguishes it from an elevator unit, which is mounted on each section of the house.

In this case, the installation is carried out after the unit that takes into account the thermal energy of the system.

Image 1. A schematic diagram of the AUU with mixing pumps on the lintel for temperatures up to AUU t = 150-70 ˚C for one- and two-pipe heating systems with thermostats (P1 - P2 ≥ 12 mWC).

The automated control unit is represented by the diagram illustrated by IMAGE 1. The diagram provides: an electronic unit (1), which is represented by a control panel; outdoor temperature level sensor (2); temperature sensors in the coolant in the return and supply pipelines (3); flow control valve equipped with a gear drive (4); differential pressure control valve (5); filter (6); circulation pump (7); non-return valve (8).

As the diagram shows, the control unit basically consists of 3 parts: network, circulation and electronic.

The network part of the AUU includes a valve for a heat carrier flow regulator with a gear drive, a differential pressure regulator valve with a spring-loaded regulating element and a filter.

The circulation part of the control unit includes a mixing pump with a check valve. A pair of pumps serves for mixing. In this case, pumps must be used that satisfy the requirements of the automatic unit: they must work alternately with a cycle of 6 hours. Their operation should be monitored by a signal from the sensor, which is responsible for the differential pressure (the sensor is installed on the pumps).

Advantages and principle of operation of the automatic unit

Open circuit heating and hot water control unit.

The electronic part of the control unit includes an electronic unit or a so-called control panel. It is designed to provide automatic control of pumping and thermal mechanical equipment to maintain the required temperature schedule. It supports the hydraulic schedule, which should underlie the heating system for the entire building.

The electronic part also contains an ECL card, which is intended for programming the controller, the latter is responsible for the thermal mode. There is also an outdoor temperature sensor in the system, which is installed on the northern facade of the building. Among other things, there are temperature sensors for the coolant itself in the return and supply pipelines.

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Heating and hot water control unit according to an independent heating and hot water supply circuit according to a closed circuit.

Errors can arise even at the time of planning and subsequent organization of work on the implementation of the heating system. Certain mistakes are often made at the time of choosing a technical solution. One should not overlook the rules for the construction of an individual heating point. Ultimately, at the time of installation of the heating control unit, duplication of the functionality of the equipment that is installed in the central heating station may occur, this, in turn, contradicts the rules for the operation of thermal installations. So, the installation of heating control units with a balancing valve can lead to high hydraulic resistance in the system, which will entail the need for replacement or reconstruction of thermal and mechanical equipment.

An incomplete installation of heating control units can also be called a mistake, which will certainly violate the established thermal and hydraulic balance in the intra-quarter networks. This will cause a deterioration in the performance of the heating system in almost every connected building. It is necessary to make a thermal adjustment at the time of operation heating equipment.

Errors often occur during the commissioning of a heating control unit at the design stage. This is due to the lack of working projects, the use of a standard project, devoid of calculations, binding and selection of equipment to certain conditions. The result is a violation of heat supply regimes.

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Heating and hot water control unit according to an independent scheme.

The selected schemes for installing heating control units may not correspond to the required ones, which negatively affects the heat supply. It also happens that at the time the system is put into operation, the technical conditions used do not correspond to the real parameters. This can lead to incorrect selection of the node scheme.

At the time of commissioning of the automation unit, it should be borne in mind that the heating system could previously undergo major overhauls and reconstruction, during which the circuit could be changed from one-pipe to two-pipe. Problems can arise when a node is calculated for a system that existed before the reconstruction.

The system commissioning process should not be carried out in winter period so that the system starts up in a timely manner.

Diagram of an automated control unit for the heating system (AUU) at home.

It should be remembered that air temperature sensors must be mounted on the north side, which is necessary for correct adjustment temperature regime, in this case, solar radiation will not be able to influence the heating of the sensor.

During the commissioning process, a backup power supply of the node must be provided, which will help to avoid stopping the central heating system in the event of a power outage. It is necessary to make adjusting and adjustment work, as well as measures for noise reduction, maintenance of the unit should take place. It should be noted that non-observance of one or more of the rules can lead to non-heating of the system, and the absence of damping equipment will lead to uncomfortable noise.

The implementation of the control node should be accompanied by a check of the issued technical conditions, they must correspond to the actual data. And technical supervision must be carried out at each stage of work. After all work on the system has been completed, maintenance of the unit should begin, which is carried out by a specialized organization. Otherwise, the downtime of expensive equipment of an automated unit or its unskilled maintenance can lead to failure and other negative consequences, including the loss of technical documentation.

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An example of the execution of the scheme of the control unit for heating and heat supply systems.

The use of the node will be most effective in cases where the house has subscribed elevator nodes of heating systems, which are directly connected to the city heating main networks. Such use will also be effective in the conditions of terminal houses linked to a central heating station, where there are insufficient pressure drops in the central heating with the obligatory installation of central heating pumps.

Efficiency of use is also noted in houses that are equipped with gas water heaters and central heating, such buildings can also have decentralized hot water supply.

It is recommended to install automated units in a comprehensive manner, covering all non-residential and residential buildings that were connected to the central heating station. Installation and commissioning, as well as the subsequent acceptance into operation of the entire system and related equipment of the unit must be carried out simultaneously.

It should be noted that with the installation of an automated unit, the following measures will be effective:

Implementation of the transfer of the central heating station, which has a dependent scheme for connecting individual heating systems, to one that will be independent. In this case, the installation of an expansion membrane tank at the heating point will also be effective.
Installation in a central heating station, which is characterized by a dependent connection scheme for equipment similar to an automated control unit.
Adjustment of intra-quarter central heating networks with installation of throttling diaphragms and design nozzles at inlet and distribution units.
Implementation of the transfer of dead-end hot water systems to circulation circuits.

https://youtu.be/M9jHsTv2A0Q

The operation of exemplary automated units has shown that the use of AUU in conjunction with balancing valves, thermostatic valves and insulation measures can save up to 37% of thermal energy, providing comfortable living conditions in each of the premises.

1poteply.ru

Installation of automation of control units

Installation of an automated control unit (AUU) of a central heating system allows you to provide:

Monitoring the fulfillment of the required temperature schedule for both the supply and return heat carrier, depending on the outside air temperature (prevention of overheating of the building);

The function of coarse cleaning of the coolant supplied to the heating system;

From all of the above, it follows that the main motivation for using AUU for a central heating system is, first of all, the technical need to ensure the functioning of a modern energy-efficient heating system equipped with thermostats and balancing valves.

The use of thermostats and automatic balancing valves makes a significant difference modern systems from previously used unregulated heating systems.

Variable hydraulic operating mode of the heating system associated with the dynamics of the thermostatic valves.

Installation of automatic balancing valves on the risers of the central heating system

For stable operation of the heating system in all operating modes (and not only under design conditions at -28 ° C), it is necessary to use automatic balancing valves.

Automatic balancing valves are designed primarily to create favorable hydraulic conditions for the efficient operation of thermostats.

Also, automatic balancing valves provide:

Hydraulic balancing (linking) of individual rings of the heating system, i.e. evenly distribute the required (design) flow of the coolant along the risers of the heating system;

Separation of the heating system into hydraulic zones that do not affect the work of each;

Elimination of the phenomenon of excessive consumption of the coolant through the risers of the heating system;

Significant simplification of work on adjustment (changeover) of the heating system;

Stabilize the dynamic mode of operation of the heating system due to the response of radiator thermostats to changes in temperature inside the dwelling.

Installation of radiator thermostats on heating devices

Individual quantitative regulation of heat energy can be realized when using thermostats on heating devices.

Radiator thermostats are means of individual regulation of the air temperature in heated rooms, maintaining it at a constant level, set by the consumer himself.

Thermostats allow:

Use the free amount of heat surplus from people, household appliances, solar radiation, etc., directing them as much as possible for heating premises and thereby saving thermal energy and funds for its payment;

Provide a comfortable temperature in the room, providing the most comfortable living conditions;

Eliminate room temperature regulation due to open vents, thereby preserving the maximum heat energy inside the premises and reducing consumption hot water on the heating system.

With such an integrated approach to automation of the central heating system, it is achieved:

Maximum heat savings;

High level of living comfort;

Interaction of all elements of the system;

Automated control unit (AUU)

Until now, at the entrance to the building, an elevator unit for mixing the coolant was used. This elementary device is adapted only for heating systems, in which the task of energy saving was not set.

The main fundamental distinguishing features of modern energy-saving systems are:

Increased hydraulic resistance of the heating system in comparison with old systems;

Variable hydraulic operating mode of the heating system associated with the dynamics of the thermostatic valves;

Increased requirements for maintaining the design pressure drop.

As a result, the use of elevator units in such systems in any of their design becomes impossible because:

The elevator is not able to overcome the increased hydraulic resistance of the heating system;

The presence of elevator units in the heating system with thermostatic valves leads to overheating of the risers during the warm period of the heating season and their cooling during the period of significant cold snap;

The elevator, as a device with a constant mixing ratio, does not allow to prevent the danger of an overstatement of the return heat carrier temperature, which occurs when the thermostats are triggered, and to ensure the maintenance of the temperature schedule.

The above technical flaws the use of an elevator indicates the need to replace it with automated control units (AUU), which provide:

Pump circulation of the coolant in the heating system;

Monitoring the fulfillment of the required temperature schedule for both the supply and return heat carrier (prevention of overheating and overcooling of buildings);

Maintaining a constant pressure drop at the entrance to the building, which ensures the operation of the heating system automation in the design mode;

The function of coarse cleaning of the coolant supplied to the system in operating mode and cleaning the coolant when filling the system;

Visual control parameters of temperature, pressure and pressure difference of the coolant at the inlet and outlet of the AUU;

The ability to remotely monitor the parameters of the coolant and operating modes of the main equipment, including alarms.

From all of the above, it follows that the main motivation for the use of automated control units is, first of all, the technical need to ensure the functioning of a modern energy-efficient heating system equipped with thermostats and other regulating devices.

Finished project binding, depending on the further belonging to the operation, is agreed in the heat supply organization.

The automated control unit consists of:

Variable-frequency drive pump;

Shut-off valves ( Ball Valves);

Control valves (motorized valve);

Direct acting hydraulic pressure regulators (differential pressure or "upstream");

Pipe fittings(filters, check valves);

Instrumentation devices (manometers, thermometers);

Outdoor and indoor air temperature sensors and differential pressure switches;

Control panel with built-in controller.

Local regulation

High-quality local automatic regulation of the parameters of the heat carrier for the heating system can be carried out only if there is an electric circulation pump in its circuit.

For regulation, digital electronic controllers of the series are used. These controllers, according to the ratio of the readings of the temperature sensors of the coolant and the outside air, control the motor control valves through which the coolant is supplied from the heating system.

In AUU there is a large range of actuators - saddle through and three-way control valves, which are driven by electric drives.

Actuators differ in power and stem speed, and in the presence of a return spring that closes or opens the valve in the event of a power failure. In order to stabilize the hydraulic regimes of external heating networks and to ensure the operation of the actuators in the optimal pressure range, a differential pressure regulator is installed at the entrance to the building, or a pressure regulator is installed “upstream” on the return pipeline.

Automatic balancing valves

Automatic balancing valves of the type are installed on risers or horizontal branches of two-pipe heating systems in order to stabilize the pressure difference in them at a level that is required for optimal operation of automatic radiator thermostats. Applied at overhaul In apartment buildings, balancing valves for two-pipe heating systems are a constant pressure differential regulator, to the control membrane of which a positive pressure pulse is supplied from the supply riser of the heating system through an impulse pipe and a negative pulse from the return riser through the internal channels of the valve.

The impulse pipe is connected to the supply riser through a shut-off valve or a shut-off and balancing valve. The balancing valve is adjustable. It can maintain differential pressures between 0.05–0.25 or 0.2–0.4 bar.

The valve is adjusted to the differential pressure adopted in the project by rotating its spindle by a certain number of revolutions from the closed position. The valve is also a shut-off valve.

In addition, valves DN = 15–40 mm have a drain cock for draining the heating system riser.

Automatic balancing valves type AB-QM are installed on risers or horizontal branches of one-pipe heating systems in order to maintain a constant flow rate in them.

Adjustment of the AB-QM balancing valves is made by turning the ring designated for this until the mark on it aligns with the number on the scale indicating the percentage (%) of the maximum flow rate according to the table line.

Radiator thermostats

Thermostats used in the overhaul of houses are a combination of two parts: a control valve of the RTD-N or RTD-G type and an automatic thermostatic element, usually an RTD.

The device and principle of operation of the thermostatic element

The thermocouple is the main automatic control device. Inside the RTD thermoelement there is a closed corrugated container - a bellows, which is connected through the thermoelement stem to the control valve spool.

The bellows is filled with a gaseous substance that changes its state of aggregation under the influence of changes in the air temperature in the room. When the air temperature drops, the gas in the bellows begins to condense, the volume and pressure of the gaseous component decrease, the bellows expands (see design features in Fig. 3), moving the valve stem and spool towards the opening. The amount of water passing through heater, increases, the air temperature rises. When the air temperature begins to exceed the set value, the liquid medium evaporates, the gas volume and its pressure increase, the bellows is compressed, moving the stem with the spool towards the valve closing.

Valves for radiator thermostats for a two-pipe heating system

Valve RTD-N is a valve with increased hydraulic resistance with preliminary installation setting of its limit bandwidth... Valves are used with nominal diameter from 10 to 25 mm, straight and angle, nickel-plated.

Main technical characteristics of RTD-N valves:

Valves of radiator thermostats for a one-pipe heating system RTD-G - a valve of low hydraulic resistance without a device to limit its throughput. The valves are used with a nominal diameter of 15 to 25 mm with a nickel-plated body. They can also be straight and angled.

The main technical characteristics of RTD-G valves are shown below:

Installation and commissioning of automated heating systems

Automated heating systems do not require complex instrument setup. All adjustment of systems made in accordance with the project is reduced to the following:

1. Installation of presettings of valves of radiator thermostats to the calculated and specified in the project values of throughput (setting indices). Adjustment is carried out without the use of any tools by turning the tuning bit until the digital index on it aligns with the mark drilled on the valve body. The setting is hidden from outside interference under the thermostatic element installed on the valve.

2. Setting up automatic balancing valve ASV-PV in two-pipe system heating to the required pressure drop. When shipped from the factory, the ASV-PV is set for a differential pressure of 10 kPa. A hex L-key is used for adjustment. Beforehand, the valve must be fully open by turning its handle counterclockwise. Then insert the key into the hole of the stem and rotate it clockwise until it stops, after which the key is again unscrewed counterclockwise by the number of revolutions corresponding to the required adjustable pressure drop. So, to set the ASV-PV valve with a setting range of 0.05–0.25 bar for a pressure drop of 15 kPa, the key must be turned 10 turns, and to set it to 20 kPa - 5 turns. 3. Setting the automatic balancing valve AB-QM in a one-pipe heating system to the design flow through the riser. Adjustment is made by manually turning the adjusting ring of the AB-QM valve until the percentage (%) of the maximum flow through the valve of the accepted diameter matches the red mark on the valve neck.

Setting the thermostat to the required temperature

In order for the thermostat to be ready for operation, a thermostatic head must be installed on it. All you need to do is set the desired heating level on the thermostatic head. After that, the thermostat will independently maintain the set temperature in the room, increasing or decreasing the flow of hot water through the heater. You can also set any intermediate temperature value.

Thus, you can set a different temperature in each room, regardless of the temperature in other rooms. For reliable and accurate operation, do not obstruct the thermostat with furniture or curtains to ensure a constant flow of air.

The thermostat does not require maintenance, is not sensitive to the composition and temperature of the water, and its performance is not affected by a break in the heating season.

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Automated control units for engineering systems: what you need to know when planning an MKD overhaul

We will help you understand the concepts associated with heating and hot water control units, as well as with the conditions and methods of using these units. After all, the inaccuracy of terminology can lead to confusion in the definition, for example, of the permitted type of work during the overhaul of MKD.

The equipment of the control unit reduces the heat energy consumption to the standard level when it enters the MKD in an increased volume. Unified terminology should correctly reflect the functional load that such equipment carries. There is no desired unity yet. And misunderstandings arise, for example, when the replacement of an obsolete design with a modern automated one is called a modernization of the assembly. In this case, the obsolete unit is not upgraded, that is, not modernized, but simply replaced with a new one. Replacement and modernization is independent species works.

Let's figure out what it is - an automated control unit.

Development of communal infrastructure: measure seven times ...

What are the control units for heating and water supply systems

Control nodes for any type of energy or resource include equipment that directs this energy (or resource) to consumers and adjusts its parameters, if necessary. Even a collector in the house can be attributed to the thermal energy control unit, which receives the coolant with the parameters necessary for the heating system and directs it to various branches of this system.

Elevator units and automated control units can be installed in MKD connected to a heating network with high coolant parameters (water overheated to 150 ° C). DHW parameters can also be adjusted.

In the elevator unit, the parameters of the coolant (temperature and pressure) are reduced to the set values, that is, one of the main control functions is carried out - regulation.

In the automated control unit, closed-loop automation regulates the parameters of the coolant, providing the set air temperature in the room, regardless of the outside air temperature, and maintains the required pressure difference in the supply and return pipelines.

Automated control units for the heating system (AUU SO) can be of two types.

In AUU CO of the first type, the temperature of the coolant is brought to the specified values by mixing water from the supply and return pipelines using network pumps, without installing an elevator. The process is carried out automatically using feedback from a temperature sensor installed in the room. The coolant pressure is also automatically regulated.

Manufacturers give these type of automated units a variety of names: heat control unit, weather control unit, weather control unit, weather control mixing unit, automated mixing unit, etc.

Subtlety

The adjustment must be complete

Some enterprises produce automated units that only regulate the temperature of the coolant. Lack of a pressure regulator can cause an accident.

AUU SO of the second type includes plate heat exchangers and forms independent system heating. Manufacturers often call them substations. This is not true and confusing when placing orders.

In DHW systems MKD can be installed liquid temperature controllers (TRZH), which regulate the temperature of the water, automated control units for the DHW system, providing water supply of a given temperature according to an independent scheme.

As you can see, not only automated units can be classified as control units. And the opinion that outdated elevator units and TRZ are incompatible with this concept is wrong.

The formation of an erroneous opinion was influenced by the wording in Part 2 of Art. 166 ZhK RF: "nodes for control and regulation of consumption of heat energy, hot and cold water, gas". It cannot be called correct. Firstly, regulation is one of the management functions, and this word should not be used in the given context. Secondly, the word "consumption" can also be considered redundant: all the energy supplied to the node is consumed and measured by the devices. At the same time, there is no information about the target to which the control unit directs thermal energy. It can be said more definitely: a control unit for thermal energy consumed for heating (or for hot water supply).

By managing heat energy, we ultimately control heating or hot water systems. Therefore, we will use the terms "heating system control unit" and "hot water supply system control unit".

Automated nodes are new generation control nodes. They meet the most modern requirements for the subject of control of heating and hot water systems, and allow raising the technological level of these systems to full automation of the processes of regulating the temperature parameters of indoor air and water in the hot water supply system, as well as automation of heat consumption metering.

By virtue of their design, elevator units and TRZ cannot meet the above requirements. Therefore, we refer them to the control units of the previous (old) generation.

So, let's summarize the first results. There are four types of heating and hot water control units. When choosing a control unit, find out what type it belongs to.

Renovation work on the water supply using a "spray pipe"

Can you believe the names

Manufacturers of control units based on the mixing of a heating medium from the supply and return pipelines often call their products weather regulators. This name does not at all reflect their properties and purpose.

The automated control unit does not regulate the weather. Depending on the outside temperature, it regulates the temperature of the heating medium. In this way, the set air temperature is maintained in the room. But the same is done by automated units with heat exchangers and even elevator units (but with less accuracy).

Therefore, let's clarify the name: an automated unit (mixing type) for controlling the heating system. Then you can add its name assigned by the manufacturer.

Manufacturers of automated control units with heat exchangers usually call their products heat points (TP). Let's turn to regulatory documents.

To make sure that the identification of automated nodes with TP is incorrect, we turn to SNiP 41-02-2003 and their updated edition - SP 124.13330.2012.

SNiP 41-02-2003 "Heating networks" consider a heating point as a separate room that meets special requirements, which houses a set of equipment for connecting heat consumers to the heating network and supplying this energy given parameters by temperature and pressure.

In SP 124.13330.2012, a heat point is defined as a structure with a set of equipment that makes it possible to change the thermal and hydraulic regime of the heat carrier, to ensure metering and regulation of the consumption of heat energy and heat carrier. This is a good definition of TP, to which the function of connecting equipment to the heating network should be added.

In the Rules technical exploitation thermal power plants (hereinafter referred to as the Rules) TP is a set of devices located in a separate room, providing connection to the heating network, control of heat distribution modes and regulation of coolant parameters.

In all cases, the TP connects a complex of equipment and the room in which it is located.

SNiP subdivide heating points into detached ones, attached to buildings and built into buildings. In MKD, transformer substations are usually built-in.

A heating point can be group or individual - to serve one building or part of a building.

Now we will formulate the correct definition.

An individual heating station (IHP) is a room in which a set of equipment is installed for connecting to a heating network and supplying an MKD or one part of a coolant to consumers with regulation of its thermal and hydraulic regime to give the parameters of the coolant a given value in temperature and pressure.

In this definition of ITP, the main importance is attached to the room in which the equipment is located. This is done, firstly, because such a definition is more consistent with the definition presented in SNiP and SP. Secondly, it warns of the incorrect use of the concepts of ITP, TP and the like to designate automated control units for heating and hot water supply systems manufactured at various enterprises.

Let us also clarify the name of the control unit of the type under consideration: an automated unit (with heat exchangers) for controlling the heating system. Manufacturers can indicate their own product name.

On the situation in the industries of heat supply, water supply and wastewater disposal

How to qualify work with a control unit

Certain works are associated with the use of automated control units:

installation of a control unit;
repair of the control unit;
replacement of the control unit with a similar one;
modernization of the control unit;
replacement of an outdated assembly with a new generation assembly.

Let us clarify what is the meaning of each of the listed works.

Installation of a control unit implies its absence and the need for installation in an MKD. Such a situation may arise, for example, when two or more houses are connected to one elevator node (houses on a coupling) and it is necessary to install an elevator node on each house in order to be able to separately meter the consumption of heat energy and increase responsibility for the operation of the entire heating system in each house. Any control node can be installed.

Repair of the engineering systems control unit ensures the elimination of physical deterioration with the possibility of partial elimination of obsolescence.

Replacing a unit with a similar one that does not have physical wear and tear assumes the same result as when repairing a unit, and can be done instead of repair.

Modernization of the unit means its renewal, improvement with the complete elimination of physical and partial obsolescence within existing structure node. Both the direct improvement of an existing unit and its replacement with an improved unit are all types of modernization. An example is replacing an elevator assembly with a similar assembly with an adjustable elevator nozzle.

Replacement of outdated units with new generation units involves the installation of automated control units for heating and hot water supply systems instead of elevator units and HWS. In this case, the physical and moral deterioration is completely eliminated.

All these are independent types of work. This conclusion is confirmed by Part 2 of Art. 166 LCD RF, where as an example independent work the installation of the thermal energy control unit is shown.

Why do you need to determine the type of work

Why is it so important to classify this or that work related to control units as a certain type of independent work? This is of fundamental importance when performing selective overhauls. Such repairs are carried out from the funds of the capital repair fund, formed at the expense of obligatory contributions from the owners of premises to the apartment building.

The list of works on selective overhaul is given in Part 1 of Art. 166 LCD RF. The above independent work was not included in it. However, in Part 2 of Art. 166 of the RF LC says that the subject of the RF may supplement this list with other works by the relevant law. At the same time, it becomes fundamentally important to match the wording of the work included in the list with the nature of the planned use of the control unit. Simply put, if it was supposed to modernize the unit, then the list should include work with exactly the same name.

St. Petersburg expanded the list of overhaul works

The law of St. Petersburg dated 11.12.2013 No. 690-120 "On overhaul of common property in apartment buildings St. Petersburg "was included in the list of works on selective overhaul in 2016 the following independent work: installation of control units and regulation of heat energy, hot and cold water, electricity, gas.

The wording is completely borrowed from the Housing Code of the Russian Federation with all the inaccuracies we noted earlier. At the same time, it clearly indicates the possibility of installing a control unit and regulation of heat energy, i.e., a control unit for the heating system and hot water supply system, during the production of selective overhaul carried out in accordance with this law.

The need to perform such independent work is due to the desire to disconnect houses on a coupling, that is, houses whose heating systems receive a heat carrier from one elevator unit, and to install its own heating system control unit on each house.

The amendment made to the law of St. Petersburg makes it possible to install both a simple elevator unit and any automated control unit for engineering systems. But it does not allow, for example, to replace the elevator unit with an automated control unit at the expense of the capital repair fund.

Credit in the morning - overhaul in the MKD in the evening

Automated mixing-type units, which do not include a pressure regulator, are not recommended for use with high-temperature heat supply networks. Automated control units for the DHW system should be installed only with heat exchangers that form a closed DHW system.

conclusions

The control units include all units that direct the energy carrier to the heating system or hot water supply with regulation of its parameters, from outdated elevators and HVDC to modern automated units.
Considering the proposals of manufacturers and suppliers of automated control units, it is necessary to recognize, behind the beautiful names of weather regulators and heating points, which of the following types of units the proposed product belongs to:

an automated mixing-type unit for controlling the heating system;
an automated unit with heat exchangers for controlling a heating system or a hot water supply system.

After determining the type of automated unit, you should study in detail its purpose, technical characteristics, product cost and installation works, operating conditions, frequency of repair and replacement of equipment, the amount of operating costs and other factors.

When deciding on the use of an automated control unit for engineering systems for selective overhaul of MKD, it is necessary to make sure that the selected type of independent work on the installation, repair, modernization or replacement of the control unit exactly corresponds to the name of the work included by the law of the subject of the Russian Federation in the list of work on capital repair of MKD. Otherwise, the selected type of work on the use of the control unit will not be paid from the capital repair fund.

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Automated heating system control unit

Brief description of the device

The unit consists of a corrective pump, an electronic temperature controller that maintains a predetermined temperature schedule, and differential pressure and flow controllers. Structurally, these are pipeline blocks mounted on a metal support frame, including a pump, control valves, elements of electric drives and automation, instrumentation, filters, mud collectors.

At the request of the customer, a mode can be provided for reducing the temperature in heated rooms at night, on weekends and holidays, which gives significant savings.

The plant produces automated control units for the heating system, their installation, commissioning, warranty and service.

Energy saving is especially important because it is with the introduction of energy-efficient measures that the consumer achieves maximum savings.

Specifications heating radiators

We have many years of experience and a detailed understanding of the specifics of working with heating networks, including overhaul, which allows us to do the work quickly, efficiently and on time.

As part of the city's energy saving program, the company is engaged in the design, installation and commissioning of automated control units (AUU), which provide thermal energy savings in the central heating system of houses. DKR of Moscow within the framework of the city energy saving program during major repairs recommends our company as an AUU installer. When installing the AUU, the company installs a factory-readiness unit of its own production, which has a certificate of the State Standard of Russia, and also uses equipment of domestic and imported production.

The equipment installed by us is located in all districts of Moscow. Our company carries out a full range of works related to the design, manufacture, installation, commissioning and repair of heat and power facilities of any complexity.

To date, we have produced, installed and launched more than 1680 AUU in Moscow and M.O.

We are confident in the quality of our work and are ready, at your request, to arrange an excursion to any of our facilities to choose from. You can also visit our production, meet with our specialists and you will have no doubts about the professionalism of the company.

High-ranking officials of the city of Moscow have visited our facilities more than once.

Moscow Mayor Sergei Sobyanin examined two houses on Nakhimovsky Prospekt, which were undergoing major repairs. Sergei Sobyanin went down to the basement of the house, where he examined the automated central heating control unit produced by our company. He highly appreciated the quality of the equipment manufactured and the performance.

Our company works with 106 management companies in Moscow and the Moscow region. Currently, the company has more than 800 AUUs for servicing and we are constantly working on concluding new contracts with the management company.

We design, complete, manufacture, install, commission and we serve.

Automated Control Units of the Central Heating System (AUU CH)
Thermal Energy Metering Units (UUTE)
Central heating station, ITP, BTP
Dispatching systems

LLC "SSK" has its own production base, which is equipped with all the necessary mechanisms for work, special devices, measuring instruments.

The company has 24/7 emergency service and provides a full range of warranty and post-warranty equipment for the entire period of cooperation. We have all the relevant documentation and all permits, employees are constantly undergoing specialized training.

Taking into account the well-coordinated work, a well-thought-out service schedule and production capacity, we can serve up to 1000 objects monthly.

Our advantages

More than 8 years on the production market and Maintenance AUU,
More than 800 AUU for service in Moscow,
Service partner of Danfoss corporation, Grundfos, Wilo,
We provide a 5-year warranty for Danfoss, Grundfos, Wilo,
Own production base,
Certified production and products,
24-hour service and emergency team,
Minimum terms of installation, adjustment and repair of equipment,
We serve UUTE in Moscow (taking readings, repair, installation, verification).

Our company is interested in long-term and mutually beneficial cooperation and partnership.

Automated control unit heating system is a type of individual heating point and is designed to control the parameters of the coolant in the heating system, depending on the outside temperature and the operating conditions of buildings.

In the automated control unit, the regulating elements of the Danfoss company are installed, the pump is of the Grundfoss company. The control units are completed taking into account the recommendations of Danfoss specialists, who provide consulting services in the development of these units.

The node works as follows. When conditions occur when the temperature in the heating network exceeds the required one, the electronic regulator turns on the pump, and the pump adds to the heating system as much cooled heat carrier from the return pipeline as is necessary to maintain the set temperature. The hydraulic regulator, in turn, is covered, reducing the supply of heating water.

Working hours automated control unit round-the-clock in winter, the temperature is maintained in accordance with the temperature schedule with correction for the return water temperature.

At the request of the customer, a mode can be provided for reducing the temperature in heated rooms at night, on weekends and holidays, which gives significant savings.

Reducing the air temperature in residential buildings at night by 2-3 ° C does not worsen sanitary and hygienic conditions and at the same time gives savings of 4-5%. In industrial and administrative-public buildings, heat savings due to temperature reduction during non-working hours is achieved to an even greater extent. The temperature during non-working hours can be maintained at the level of 10-12 ° C. The total heat savings with automatic regulation can be up to 25% of the annual consumption. During the summer period, the automated unit does not work.

Energy saving is especially important because it is with the introduction of energy-efficient measures that the consumer achieves maximum savings.

Range of heating system control units

	Q, Gcal / h	dpipe, mm
1	0,15	50
2	0,30	50
3	0,45	65
4	0,60	80
5	0,75	80
6	0,90	80
7	1,05	80
8	1,20	100
9	1,35	100
10	1,50	100

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Heat energy control unit. Local heating systems control units

Quick ordering of products Automated heating system control unit

Specifications

Advantages and principle of operation of the automatic unit

Installation of automation of control units

Automated control unit (AUU)

Automatic balancing valves

Installation and commissioning of automated heating systems

Setting the thermostat to the required temperature

Automated control units for engineering systems: what you need to know when planning an MKD overhaul

What are the control units for heating and water supply systems

The adjustment must be complete

Can you believe the names

How to qualify work with a control unit

Why do you need to determine the type of work

St. Petersburg expanded the list of overhaul works

conclusions

Automated heating system control unit

Brief description of the device

Quick ordering of products
Automated heating system control unit