We have many years of experience and a detailed understanding of the specifics of working with heating networks, including during major repairs, which gives us the opportunity 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 (ACU), which provide savings in thermal energy in the system central heating houses. DKR of Moscow within the framework of the city energy saving program during major repairs recommends our company as an installer of automatic control units. When assembling ACU, the company installs a factory-ready unit of its own production, which has a certificate from the State Standard of Russia, and also uses equipment of domestic and foreign production.

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

To date, we have produced, installed and launched more than 1680 ACUs in Moscow and Moscow Region.

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

Our facilities have been visited by high-ranking leaders of the city of Moscow more than once.

The mayor of Moscow, 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 manufactured by our company. He highly appreciated the quality of the equipment manufactured and its operation.

Our company works with 106 management companies in Moscow and the nearest suburbs. Currently, the company has more than 800 ACUs for servicing, and we are constantly working to conclude new contracts with the management company.

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

1. Automated Control Units of the Central Heating System (AUU CH)
2. Thermal Energy Metering Units (UUTE)
3. TsTP, ITP, BTP
4. Dispatch systems

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

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

Given the well-coordinated work, a well-thought-out maintenance schedule and production capacity, we can serve up to 1000 objects every month.

Our advantages

1. More than 8 years in the market of production and Maintenance ayy,
2. More than 800 ACUs for service in Moscow,
3. Service partner of Danfoss, Grundfos, Wilo,
4. We provide a 5-year warranty for Danfoss, Grundfos, Wilo products,
5. Own production base,
6. Certified production and products,
7. 24/7 service and emergency team,
8. The minimum terms of installation, adjustment and repair of equipment,
9. We serve UUTE in Moscow (reading, repair, installation, verification).

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

Thanks to the automated heat supply control unit (ACU) installed in the basement of the house, residents can save from 20 to 30 percent of heat, depending on the technical condition of the house. Such equipment is considered one of the most effective solutions in reducing the cost of housing and communal services.

The introduction of AMS significantly reduces the monthly payments of residents of both multi-apartment and private households. The equipment allows you to track fluctuations in the external air temperature and controls the amount and temperature of the coolant supplied to the house. To control the work in real time, the equipment is equipped with a dispatching system. The operation of this system makes it possible to avoid excessive supply of coolant or the so-called "overheating", which residents often complain about with the advent of the first warm days.

Heat suppliers are forced to supply more energy to the home than is needed because the equipment in the boiler rooms does not allow a quick response to changes in outdoor temperature. To lower the temperature in apartments, many people open windows, thereby heating the street at their own expense and at the expense of their neighbors. The overheating effect is especially visible through a thermal camera, and the effects are reflected in heating bills that are about 30 percent higher.

AUU is expensive equipment, but there is a mechanism that provides for its installation at the expense of the energy service company. At the same time, compensation of investors' expenses for the purchase and installation of equipment is carried out at the expense of the resulting savings. The contract is concluded for a period of 3 to 5 years, depending on the volume of consumption and the amount of savings achieved. After the expiration of the contract, the installed equipment is transferred free of charge to the property of residents in good working order.

And most importantly, residents will never have to pay for excess heat at their own expense, regardless of the street temperature or its fluctuations.

What you need to do to install the ACU for free

1. It is necessary to hold a general meeting of homeowners to conclude an agreement with representatives of the energy service company.
2. The energy service company, based on the decision of the meeting of residents, signs a contract for the free installation of energy-saving equipment.
3. The energy service company carries out work on the installation of automatic control units and related energy-saving measures.
4. For the duration of the contract, the amount of payment for heating will remain the same, but the savings due to rational heat consumption will be distributed between residents and the energy service company: part of the income will go to compensate the company's costs, and part to the residents of the house.
5. At the end of the term of the contract, all the savings received will remain with the tenants.

Description:

Such measures are the installation of automated control units for heating systems (hereinafter referred to as ACU) instead of thermal or elevator units, the installation of balancing valves on the risers of heating systems and thermostatic valves on the connections to heating devices.

Mistakes in the implementation of automated control units for heating systems in Moscow (2008–2009)

A. M. Filippov, Head of the Energy Saving Control Inspectorate of the State Housing Inspectorate of Moscow

With the adoption of Federal Law No. 261-FZ dated November 23, 2009 “On Energy Saving and Energy Efficiency Improvement and on Amendments to Certain Legislative Acts Russian Federation» the importance of energy saving in residential buildings is growing, especially measures that allow not only to automate, but also reduce the consumption of thermal energy apartment buildings, as well as optimize the distribution of heat between consumers in the house. Such measures are the installation of automated control units for heating systems (hereinafter referred to as ACU) instead of thermal or elevator units, the installation of balancing valves on the risers of heating systems and thermostatic valves on the connections to heating devices.

Prerequisites for the introduction of ACU

For the first time, the concept of ACU appeared back in 1995, when MNIITEP developed and approved the concept of "Modern Energy-Saving Heat Supply and Heating Systems for Buildings in the Mass Construction of Moscow" and a program for its implementation. Subsequently, the introduction of AMU was spelled out in the new edition of MGSN 2.01–99 “Energy Saving in a Building”, then on April 27, 2002, a meeting of the Complex of Architecture of the City of Moscow was held, at which, among others, they considered the issue “On standard technical solutions for equipping residential buildings under construction with automated control units of heating systems.

In 2008, the State Unitary Enterprise MoszhilNIIproject, together with Danfoss LLC, compiled the album "Automated Control Units" using technical solutions standard project, and in May 2008, the heat supply organization OJSC MIPC held two meetings with the participation of design and contracting organizations for the installation of ACU on the design and development of technical conditions for linking a typical project for the installation of ACU during the overhaul of residential buildings of the 2008–2014 program.

Since August 2008, the mass introduction (installation) of ACU began in residential buildings instead of elevator and heating units, and at present in Moscow the number of residential buildings with installed automatic control units reaches 1000 buildings, which is approximately 3% of residential buildings in the city.

The principle of operation and the benefits of using ACU

What is the ACU, the device and the principle of its operation were described repeatedly in the works of M. M. Grudzinsky, S. I. Prizhizhetsky and V. L. Granovsky, including in. In addition, a similar principle of operation of the equipment is used in the central heating station of OAO MOEK (formerly in the heat points of the State Unitary Enterprise Mosgorteplo) in the automatic control system of the dependent heating system (SARZSO), but only for transitional modes in autumn and spring.

In short, ACU is a set of devices and equipment that provides automatic control of the temperature and flow of the coolant at the inlet to each building exactly in accordance with the temperature schedule specified for this building or in accordance with the needs of residents.

The advantage of ACU in comparison with thermal and elevator units that have a fixed cross section of the passage opening (elevator nozzle, throttle diaphragm), through which the coolant enters the house heating system, is the possibility of changing the amount of coolant supplied depending on the water temperature in the supply and return pipelines of the system heating with outdoor temperature correction in accordance with the temperature curve.

Unlike the elevator units installed on each section of the house, the ACU is usually mounted one per building (if there are 2 thermal inputs in the house, then 2 ACUs are installed), while the connection is made after the metering unit for the thermal energy of the heating system (if any ).

Schematic diagram and view of ACU in axonometry is shown in fig. 1, 2 (based on the materials of Danfoss LLC). Design options are possible, due to the scheme of connection to the heat network, hydraulic modes at the heat input, the specific design of the heating system of the building and operating conditions (12 standard solutions in total).

Figure 2.

An exemplary scheme of the ACU provides: 1 - electronic unit (control panel); 2 – outdoor air temperature sensor; 3 – coolant temperature sensors in the supply and return pipelines; 4 – flow regulator valve with gear drive; 5 – differential pressure regulator valve; 6 - filter; 7- circulation pump; 8 - check valve.

As can be seen from the diagram, ACU basically consists of three parts: network, circulation and electronic.

The network part of the ACU includes a coolant flow regulator valve with a gear drive, a differential pressure regulator valve with a spring regulating element and a filter.

The circulation part of the ACU includes a circulation (mixing) pump and a check valve. As mixing pumps, two Grundfos pumps (or other types of pumps that meet the requirements of the ACU) are installed, which operate alternately on a timer with a cycle of 6 hours. The pumps are controlled by a signal from a differential pressure sensor installed on the pumps.

The electronic part of the ACU includes an electronic unit (control panel) that provides automatic control of the thermal and mechanical pumping equipment in order to maintain the set temperature graph and hydraulic regime in the building heating system, the ECL card (intended for programming the controller thermal regime), an outdoor air temperature sensor (installed on the northern side of the facade of the building), coolant temperature sensors in the supply and return pipelines and a geared electric drive for the coolant flow control valve in the AC power supply unit.

Mistakes in the implementation of ACU

The main topic of this article is the mistakes made during the planning of work, design and installation of ACU in Moscow, which nullified all the work done and did not allow to obtain the planned indicators for energy efficiency and energy saving. For a year and a half, the installed AHUs were practically not used for their intended purpose or were used inefficiently, expensive equipment often stood idle in a disconnected state, and the coolant entered the house heating systems through undismantled elevators.

Of course, many of the mistakes were later corrected, and the work of the AMU was adjusted, but mistakes could have been avoided if the work was properly organized at all stages of the process.

So what were those mistakes?

1. At the stage of planning and organization of work.

When choosing a technical solution, in violation of the requirements of MGSN 2.01–99 “Energy Saving in Buildings” (clause 4.2.1.), A technical and economic comparison of the options was not carried out: 1) installation of ACU from distribution networks of central heating stations or 2) installation of ITP from city main heat pipelines and plumbing networks. As a result, when installing the ACU, the functions of the equipment installed in the central heating station were duplicated, which contradicts the "Rules for the technical operation of thermal power plants" of Rostekhnadzor of the Russian Federation (clause 9.1.2.), And the installation of the ACU and balancing valves led to an increase in hydraulic resistance in the system and the need to replace (reconstruction) of thermal and mechanical equipment of the central heating station. However, the reconstruction of the central heating substation was not envisaged, and the ACU was introduced not by the cluster method, starting from the end houses, but in a non-complex manner, only in individual buildings at the beginning or in the middle of the connection to the central heating substation. As a result, the non-complex installation of the ACU violated the established hydraulic and thermal balance in the intra-quarter heating networks, led to a deterioration in the operation of the heating systems of most of the attached buildings and necessitated expensive thermal adjustment (with the calculation of the diameters of the elevator nozzles and throttle diaphragms, their installation on the input distribution nodes and subsequent adjustment (replacement) during operation during the heating season.

2. At the design stage:

- there were no working projects, often instead of working projects, copies from a standard project were used without calculations, selection and binding of equipment to local conditions, which led to erroneous decisions when choosing and installing equipment and, as a result, to violations of heat supply regimes during its operation;

- the chosen installation schemes for the ACU did not meet the requirements, which immediately had a negative impact on the heat supply. For example, in three residential buildings of the CJSC, as a result of the dismantling of the elevator unit and the use of the AUU scheme in the dependent heating system, designed for independent systems without a mixing unit, the design temperature schedule of the system operation (95–70 °С) was violated and the primary overheated a heat carrier with a temperature curve (150/70 °C), which led to overheating of the residential premises closest along the course of the heat carrier and to a violation of the circulation of the heat carrier in the end risers (underheating of the premises located on the end risers). The operation of the system in this mode was fraught with burns of residents when they touched the instruments and pipelines. Only timely intervention helped eliminate this error before the onset of cold weather;

- issued specifications(TS) did not correspond to the actual parameters: for example, the TS and the project indicated a schedule of 150/70 °С instead of the actual 105/70 °С, which led to the wrong choice of the ACU scheme. Also, when issuing technical conditions for the ACU, it was not taken into account that in the course of overhaul heating systems were reconstructed (schemes were changed from one-pipe to two-pipe, diameters of distributing pipelines and risers, heating areas of heating devices, etc.), while the calculation of the AC was made for the heating system before the reconstruction.

3. At the stage of installation and commissioning:

- the time for installation was erroneously chosen: ACUs were often installed already in the winter period after the completion of other works, which led to complaints from residents about untimely start-up of heat, frequent shutdowns of heating, and violations temperature regime;

– in vain they refused to install ACU in cases when balancing valves were installed on the risers of central heating systems during the overhaul. Their installation led to a sharp increase in hydraulic resistance in the systems, and in the absence of ACU with pumping equipment and no work was done to replace pumps in the central heating substation in such residential buildings and neighboring houses in the heating period, problems with heat supply immediately arose;

– outdoor air temperature sensors were not mounted on the north side of the building, which led to incorrect setting of the thermal regime due to the influence of solar radiation on the sensor (its heating);

- the work of the ACU was carried out in a freelance manual mode and was not transferred to automatic mode;

– documents and ECL cards were missing due to the fact that the installation company did not transfer them to the management company;

– there was no backup power supply for the ACU, which in the event of a power outage could lead to a shutdown of the central heating system;

- adjustment and adjustment work and noise reduction measures were not carried out;

- there was no maintenance of the ACU.

As a result of these errors and violations, in houses with installed ACs, there were numerous complaints from residents about the non-heating of the heating system and the noise from the operation of the equipment.

All of the above became possible due to the poor organization of work, the lack of proper control by the customer over all stages of the process of implementing ACU. The author hopes that the published article will help to avoid such mistakes in the future both in Moscow and in other cities.

When introducing ACU, it is necessary to clearly organize the work of design organizations, relevant construction and installation and repair and maintenance services, carefully check the issued technical specifications for compliance with actual data, conduct technical supervision at each stage of work, and immediately after installation, begin maintenance of the ACU by a specialized organization. . Otherwise, downtime of expensive ACU equipment or its unskilled maintenance will lead to failure, loss of technical documentation and other negative consequences.

Effective use of ACU

The use of ACU is most effective in the following cases:

- in houses with subscribed elevator units of the heating system, directly connected to the city's main heating networks;

– in end houses linked to the central heating substation with insufficient pressure drop in the central heating system with obligatory installation central heating pumps;

- in houses with gas water heaters(with decentralized hot water supply) and central heating.

ACU should be installed in a complex, cluster method, covering all, without exception, residential and non-residential buildings connected to the central heating station.

Installation and commissioning of the heating system and ACU equipment must be carried out simultaneously.

It should be noted that along with the installation of ACU, the following measures are quite effective:

- transfer of the central heating substation with a dependent scheme for connecting heating systems to an independent one with the installation of a membrane expansion tank;

- installation in the central heating station with a dependent connection scheme of equipment for automatic control of heat supply (SAR ZSO), similar to AUU;

- adjustment of intra-quarter central heating networks with the installation of design nozzles for elevators and throttle diaphragms at the inlet-distribution nodes of buildings;

– transfer of dead-end hot water supply systems to circulation schemes.

In general, the operation of exemplary ACUs has shown that the use of ACUs in conjunction with balancing valves on the risers of the central heating system, thermostatic valves on each heater and carrying out warming measures allows you to save up to 25-37% of thermal energy and provide comfortable living conditions in each room.

Literature

1. Grudzinsky M. M., Prizhizhetsky S. I. Energy efficient heating systems // ABOK. - 1999. - No. 6.

2. Granovsky V. L., Prizhizhetsky S. I. Heating system for residential buildings of mass construction and reconstruction with integrated automation of heat consumption // ABOK. - 2002. - No. 5.

A modern heating control system allows you to implement the most complex and advanced schemes and programs for adjusting equipment operation modes, achieve significant energy savings, provide remote control heating. We want to consider the heating control unit in terms of its design and operational features and advantages.

Automatic control unit

Purpose

The automatic control unit is an individual heat point designed to control the parameters of the coolant circulating in the heating system, depending on the temperature indicators in the room, on the street, in the supply and return pipelines of the circuit.

In addition, the system allows you to implement protection against emergency situations, switching equipment operation modes, GSM heating control. In the event of a breakdown or an emergency situation, the module is able to notify all subscribers included in the mailing list using SMS messages.

However, this is far from full list functions.

The control node can provide:

• Modes and parameters of operation, a given coolant circulation rate;
• Control of maintaining and fulfilling the specified temperature schedule of the supply and return pipelines. This allows you to protect the system from overheating and hypothermia;
• Maintaining a given constant pressure drop at the supply and return inputs to the building, which allows normal operation of all automation in normal mode;
• Fine and coarse cleaning of the coolant;
• Visual control of all performance indicators of the system: temperatures in key areas, pressure difference at the inlet and outlet of the unit, set operating mode, alarms;
• Remote control of heating by phone and via the Internet;
• Remote control of the premises, alarm, entrance doors and gates with additional sensors.

Important!
To install such a system, the boiler and other equipment must be adapted for electronic control.
Old frames with mechanical latches will not work with this scheme.

Device and principle of operation

The photo shows a 3-D model of the control unit.

The composition of any automatic control system includes the following nodes:

1. Sensors and sensors that collect the necessary data in various places in the system;
2. Controllers and processors that compare the data received from the sensors with the values ​​dictated by the instruction (program) recorded on the memory card, make a decision and, based on it, issue commands to the executing mechanisms;
3. Actuating mechanisms that receive commands from controllers and perform simple actions - shut off taps and valves, increase the power of units, switch modes, perform emergency shutdowns of broken nodes.

The sensors are pressure and temperature sensors, as well as any additional sensors that allow you to control different processes. The most important are temperature sensors for the supply and return flow of the coolant, indoor and outdoor temperature sensors, as well as pressure sensors at the inlet to the system.

The role of the controller is played by a low-power computer that reads information from all sensors. The computer memory card contains a program that determines the temperature regimes.

The controller compares the obtained values ​​with the preset ones, and, if necessary, decides to make changes: increasing the coolant supply to a particular circuit, turning off the boiler or transferring it to another operating mode, etc.

Upon making a decision, the controller sends a control signal to one or another actuator: switching relay, valve or damper servo drive, switch or boiler electronics. Depending on the given program, the GSM heating control module can send messages to the owner about a particular event, and after waiting for a response, take certain measures.

Heating control in a country house via GSM is carried out using a special module built into the computer.

This module includes the following elements:

• Slot for switching SIM-card;
• Power supply and battery;
• GSM modem;
• Antenna connector;
• LAN port for connecting to an Internet provider;
• Microprocessor;
• Memory card;
• USB connector for setup and configuration;
• LED indicators or liquid crystal display;
• Contact group with inputs and outputs for collecting data and sending control signals.

Important!
Together with the module for GSM control, software must be supplied for installation on the operating system of the mobile phone.
The program will help organize remote communication between the controller and the operator.

Advantages

What are the benefits of using an automatic heating control unit?

A modern controller with a communication module allows you to get the following advantages and benefits:

• Fine-tuning the system in real time allows you to achieve maximum savings with the right level of comfort;
• You can achieve exactly the temperature and climatic parameters of the room that you want, and for this it is enough just to set the values ​​​​of the desired temperatures;
• The system of instant notification of emergency modes and abnormal events significantly increases the reliability and safety of work;
• You have the opportunity to leave the house with the heating working and monitor its condition at a distance, as well as control the operating modes, turn the equipment on or off remotely;
• Winter visit to Vacation home when the heating is off, it requires you to go into a cold room, melt the unit and wait a few hours until the room warms up. Now you can give a command to turn on in advance and not waste time.

You can assemble and connect the control system yourself - no permits and approvals are required for this. The job is easy to do by following the manufacturer's instructions. The price of a kit can vary from 4 to 40 thousand rubles, depending on the configuration and the manufacturer.

Important!
Most modules have connectors for connecting additional sensors, with which you can organize control over the opening of windows and doors, listening or monitoring, and other useful functions.

Output

Control and management modern systems heating can be carried out by software with remote participation of the operator. Communication can be carried out by digital cellular communication GSM or the Internet. You can find more information in our video.

Automated control node heating system is a kind of individual heat point and is designed to control the parameters of the coolant in the heating system, depending on the outdoor temperature and the operating conditions of buildings.

The unit consists of a correction pump, an electronic temperature controller that maintains a predetermined temperature curve, and differential pressure and flow controllers. And 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.

In the automated control unit, Danfoss control elements are installed, the pump is Grundfoss. The complete set of control units is made 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 controller turns on the pump, and it adds as much coolant from the return pipe to the heating system as necessary to maintain the set temperature. The hydraulic regulator, in turn, is covered, reducing the supply of network water.

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

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

Lowering the air temperature in residential buildings at night by 2-3 °C does not worsen sanitary and hygienic conditions and at the same time saves 4-5%. In industrial and administrative-public buildings, heat savings by lowering the temperature 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 control can be up to 25% of the annual consumption. During the summer period, the automated node does not work.

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

The range of control units for the heating system

	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