Now let's do a small calculation of the effect of introducing an automated control unit in an office building. Automated heating system control unit
Appendix 1
to the Department
and beautification of the city of Moscow
REGULATIONS
PERFORM MAINTENANCE AND REPAIR WORKS
OF AUTOMATED CONTROL UNIT (ACU) OF THE CENTRAL
HEATING OF HOUSES IN THE CITY OF MOSCOW
1. Terms and definitions
1.1. GU IS districts - State institutions of the city of Moscow engineering services of districts - organizations created by reorganization public institutions of the city of Moscow of unified information and settlement centers of the administrative districts of the city of Moscow in accordance with the Decree of the Government of Moscow dated 01.01.01 N 299-PP "On measures to bring the management system of apartment buildings in the city of Moscow in line with the Housing Code of the Russian Federation" and performing functions, assigned to them by the named resolution and other legal acts of the city of Moscow. Unified information and settlement centers of the Moscow city districts function as part of the GU IS of the Moscow city districts.
1.2. Managing organization - legal entity
any organizational and legal form, including a homeowners association, housing cooperative, residential complex or other specialized consumer cooperative that provides services and performs work on the proper maintenance and repair of common property in such a house, provides utility services to owners of premises in such a house and using premises in this house persons carrying out other activities aimed at achieving the goals of managing an apartment building and performing the functions of managing an apartment building on the basis of a management agreement.
1.3. Automated control unit (AUU) is a complex heat engineering device designed to automatically maintain the optimal parameters of the coolant in the heating system. The automated control unit is installed between the heating system and the heating system.
1.4. Verification of AC components - a set of operations performed by specialized organizations in order to determine and confirm the compliance of AC components with established technical requirements.
1.5. ACU maintenance - a set of works to maintain the ACU in good condition, prevent failures and malfunctions of its components and ensure the specified performance.
1.6. Serviced house - a residential building in which the technical maintenance and current repairs of the AUU are carried out.
1.7. Service log - an accounting document that records data on the condition of the equipment, events and other information related to the maintenance and repair of the automated control unit of the heating system.
1.8. AUU repair - current repair of AUU, including: replacement of gaskets, replacement/cleaning of filters, replacement/repair of temperature sensors, replacement/repair of pressure gauges.
1.9. Tank for draining the coolant - a water tank with a volume of at least 100 liters.
1.10. ETKS - Unified tariff- qualification guide works and professions of workers, consists of tariff and qualification characteristics containing the characteristics of the main types of work by profession of workers, depending on their complexity and the corresponding tariff categories, as well as the requirements for professional knowledge and skills of workers.
1.11. EKS - Unified qualification directory of positions of managers, specialists and employees, consists of qualification characteristics of positions of managers, specialists and employees, containing job responsibilities and requirements for the level of knowledge and qualifications of managers, specialists and employees.
2. General provisions
2.1. This Regulation determines the scope and content of work performed by specialized organizations for maintenance automated control units (AUU) for heat supply in residential buildings in the city of Moscow. The regulation contains the main organizational, technical and technological requirements for the performance of maintenance work on automated thermal energy control units installed in systems central heating residential buildings.
2.2. This regulation has been developed in accordance with:
2.2.1. Law of the city of Moscow N 35 dated July 5, 2006 "On energy saving in the city of Moscow".
2.2.2. Decree of the Government of Moscow dated 01.01.2001 N 138 "On approval of the Moscow city building codes" Energy saving in buildings. Standards for thermal protection and heat and water supply.
2.2.3. Decree of the Government of Moscow dated 01.01.2001 N 92-PP "On approval of the Moscow city building codes (MGSN) 6.02-03" Thermal insulation pipelines for various purposes.
2.2.4. Decree of the Government of Moscow of 01.01.01 N 299-PP "On measures to bring the management system of apartment buildings in the city of Moscow in line with the Housing Code of the Russian Federation."
2.2.5. Decree of the Government of the Russian Federation of 01.01.01 N 307 "On the procedure for providing utilities citizens."
2.2.6. Decree of the Gosstroy of Russia dated 01.01.01 N 170 "On approval of the Rules and norms for the technical operation of the housing stock".
2.2.7. GOST R 8. "Metrological support of measuring systems".
2.2.8. GOST 12.0.004-90 "System of labor safety standards. Organization of labor safety training. General provisions".
2.2.9. Intersectoral rules on labor protection (safety rules) for the operation of electrical installations, approved by the Decree of the Ministry of Labor of the Russian Federation of 01.01.2001 N 3, order of the Ministry of Energy of the Russian Federation of 01.01.2001 N 163 (as amended and supplemented).
2.2.10. Rules for the installation of electrical installations approved by the Main Technical Administration, Gosenergonadzor of the Ministry of Energy of the USSR (with amendments and additions).
2.2.11. Rules for the technical operation of electrical installations of consumers, approved by order of the Ministry of Energy of the Russian Federation of 01.01.2001 N 6.
2.2.12. Passport for the automated control unit (AUU) of the manufacturer.
2.2.13. Instructions for installation, start-up, regulation and operation of the automated control unit for heating systems (AUU).
2.3. The provisions of this Regulation are intended for use by organizations that carry out maintenance and repair of automated control units for the central heating system of residential buildings in the city of Moscow, regardless of ownership, legal form and departmental affiliation.
2.4. This Regulation establishes the procedure, composition and terms for the maintenance of automated control units for heating systems (ACU) installed in residential buildings.
2.5. Works on maintenance and repair of automated control units of the heating system (ACU) installed in residential buildings are carried out on the basis of a maintenance contract concluded between a representative of the owners of a residential building (managing organization, including HOA, housing cooperative, LCD or an authorized owner-representative in case of direct control).
3. Maintenance log
and repair of AUU (Service magazine)
3.1. All operations performed in the course of performing work on the maintenance and repair of the ACU are subject to entry in the journal of the performance of maintenance and repair of the ACU (hereinafter referred to as the Service Journal). All sheets of the journal must be numbered and certified by the seal of the Managing Organization.
3.2. Maintenance and storage of the Service Log is carried out by the Managing Organization, which manages the Serviced House.
3.3. Personal responsibility for the safety of the journal rests with the person authorized by the Managing Organization.
3.4. The Service Log contains the following data:
3.4.1. Date and time of maintenance work, including the time the maintenance team received access to the technical room of the house and the time it ended (time of arrival and departure).
3.4.2. The composition of the service team that carries out maintenance of the ACU.
3.4.3. A list of works performed during maintenance and repair, the time for each of them.
3.4.4. Date and number of the contract for the performance of work on the maintenance and repair of the ACU.
3.4.5. Service organization.
3.4.6. Information about the representative of the Managing Organization who accepted the maintenance work of the AC.
3.5. The service log refers to the technical documentation of the Serviced Home and is subject to transfer in the event of a change of the Managing Organization.
and repair of ACU
4.1. Maintenance and repair of the ACU are carried out by qualified employees in accordance with the frequency established by Appendix 1 to these Regulations for the performance of work.
4.2. Maintenance and repair work of the AUU is carried out by specialists whose specialty and qualifications comply with the minimum established requirements of clause 5 of these Technological maps.
4.3. Repairs must be carried out at the installation site of the ACU or at the enterprise directly carrying out repairs.
4.4. Preparation and organization of work on the maintenance and repair of ACU.
4.4.1. The managing organization coordinates with the organization planned to be involved in the maintenance of the AC, the work schedule, which may be an annex to the maintenance contract for the AC.
4.4.2. The last name of the maintenance team is reported to the Managing Organization in advance (before the day of maintenance and repair of the ACU). Residents of the Serviced Home must be notified in advance of the work being carried out. Such notice may be in the form of an announcement that is visible to the residents of the building. The duty to notify residents rests with the Managing Organization.
4.4.3. The Managing Organization provides the following documents (copies) for review to the Handling Organization:
Certificate;
Technical certificate;
Installation instructions;
Instructions for start-up and adjustment;
User manual;
Repair manual;
Warranty certificate;
The act of factory tests of the ACU.
4.5. Access of the maintenance team to Utility room Serviced home.
4.5.1. Access to the technical premises of a residential building for maintenance and repair of the ACU is carried out in the presence of a representative of the Managing Organization. Information about the access time of the maintenance team to the technical premises of the Serviced House is entered in the Service Log.
4.5.2. Before starting work, the readings of the control and measuring devices of the ACU are entered in the Service Log indicating the identifier of the control and measuring device, its readings and the time of their fixation.
4.6. Works on maintenance and repair of ACU.
4.6.1. An employee of the maintenance team of the Service organization performs visual inspection ACU units for the absence of leakage, damage, extraneous noise, pollution.
4.6.2. After the inspection, an inspection report is drawn up in the Service Journal, in which information is entered on the condition of the connecting pipes, their joints, and ACU units.
4.6.3. If there are leaks at the joints of the pipes, it is necessary to identify the cause of their occurrence and eliminate them.
4.6.4. Before inspecting and cleaning the ACU elements from contamination, it is necessary to turn off the power supply of the ACU.
4.6.5. The pumps must first be turned off by turning the pump control switches on the front panel of the control panel to the "off" position. After that, open the control panel and switch the 3Q4, 3Q14 pump circuit preparation machines to the off position according to scheme 1 (not shown) (Appendix 2). Then the control controller should be de-energized, for this it is necessary to switch the single-pole switch 2F10 to the off position according to diagram 1.
4.6.6. After performing the above actions, switch the three-pole switch 2S3 to the opening position according to diagram 1. In this case, the phase indicators L1, L2, L3 on the external panel of the control panel should go out.
4.7. Checking the operation of emergency protection and alarms, maintenance of electrical equipment.
4.7.1. Turn off the circuit breaker in the control panel of the operating pump according to the electrical diagram of the ACU control panel.
4.7.2. The pump should stop (the glow of the control panel on the pump will disappear).
4.7.3. The green pump operation light on the control panel should go out and the red pump alarm light should come on. The display of the controller will start flashing.
4.7.4. The backup pump should start automatically (the control panel on the pump will light up, the green light of the backup pump will light up on the control panel).
4.7.5. Wait 1 min. - the standby pump must remain in operation.
4.7.6. Press any button on the controller to reset the blinking.
4.7.7. The L66 card of the ECL 301 controller has the yellow side facing out.
4.7.8. Move up button to go to line A.
4.7.9. Press the I/II circuit selection button twice, the left LED under the card should go out.
4.7.10. The controller display will show the alarm log and ON. In the left bottom corner should be number 1.
4.7.11. Press the minus button on the controller, the display should change to OFF, a double dash should appear in the lower left corner - the alarm has been reset.
4.7.12. Press the I/II circuit selection button once, the left LED under the card will light up.
4.7.13. Use the down button to return to line B.
4.7.14. Checking the protective function of the electric drive AMV 23, AMV 413.
4.7.15. Switch off the automatic power supply of the controller in accordance with the electrical diagram of the ACU control panel.
4.7.16. The controller should turn off (the display will turn off). The electric actuator must close the control valve: verify this by looking at the position indicator of the electric actuator, it must be in the closed position (see the manufacturer's instructions for the electric actuator).
4.8. Checking the performance of automation tools heating point.
4.8.1. Set the ECL 301 controller to manual mode according to the manufacturer's instructions.
4.8.2. In manual mode from the controller, turn on - turn off the circulation pumps (track according to the indication on the switchboard and the control panel on the pumps).
4.8.3. In manual mode, open - close the control valve (track by the indicator of the movement of the electric drive).
4.8.4. Set the controller back to automatic mode.
4.8.5. Perform an emergency transfer test on the pumps.
4.8.6. Check the temperature readings on the controller display with the readings of indicating thermometers in the places where the temperature sensors are installed. The difference should not be more than 2C.
4.8.7. On the controller line on the yellow side of the card, press and hold the shift button, and the controller display will show the supply and process temperature settings. Remember these values.
4.8.8. Release the shift button, the display will show the actual temperatures, the deviation from the settings should be no more than 2C.
4.8.9. Check the pressure maintained by the back pressure regulator (differential pressure maintained by the differential pressure regulator), the setting set during the adjustment of the ACU.
4.8.10. Using the adjusting nut of the AFA pressure regulator, compress the spring (in the case of the AVA regulator, release the spring) and reduce the pressure value to the regulator (track on the pressure gauge).
4.8.11. Return the setting of the AFA (AVA) regulator to the working position.
4.8.12. Using the adjusting nut of the differential pressure regulator AFP-9 (adjusting knob AVP) by expanding the spring, reduce the value of the differential pressure (track on pressure gauges).
4.8.13. Return the setting of the differential pressure regulator to its previous position.
4.9. Checking the performance of shut-off valves.
4.9.1. Open/turn the stopcock until it stops.
4.9.2. Assess ease of movement.
4.9.3. According to the readings of the nearest pressure gauge, evaluate the blocking capacity of the shut-off valves.
4.9.4. If the pressure in the system does not decrease or does not decrease completely, it is necessary to establish the reasons for the valve leakage, if necessary, replace it.
4.10. Cleaning the mesh filter.
4.10.1. Before starting work on cleaning the mesh filter, it is necessary to close the taps 31, 32 according to scheme 2 (not shown), located in front of the pumps. Then you should turn off the valve 20 according to scheme 2, located in front of the filter.
4.10.5. After installing the filter cover, it is necessary to open the valves 31, 32 according to scheme 2, located in front of the pumps.
4.11. Cleaning the impulse piping of the differential pressure regulator.
4.11.1. Before cleaning the tubes of the differential pressure regulator, it is necessary to close the taps 2 and 3 according to scheme 2.
4.11.3. To flush the first impulse tube, open tap 2 and flush it out with a jet of water.
4.11.4. The resulting water should be collected in a special container (tank for draining the coolant).
4.11.5. After flushing the first impulse tube, replace it and screw it in union nut.
4.11.6. To flush the second impulse tube, unscrew the union nut securing the second impulse tube, then disconnect the tube.
4.11.7. To flush the second impulse tube, use tap 3.
4.11.8. After flushing the second impulse tube, reattach the tube and tighten the union nut.
4.11.9. After cleaning the impulse pipes, open valves 2 and 3 according to scheme 2.
4.11.10. After opening taps 2 and 3 (Scheme 2), it is necessary to bleed air from the tubes using the union nuts of the differential pressure regulator. To do this, unscrew the union nut 1-2 turns and tighten it after air comes out of the impulse tube, tighten it. Repeat the operation for each of the impulse tubes in turn.
4.12. Cleaning the impulse pipes of the differential pressure switch.
4.12.1. Before cleaning the tubes of the differential pressure regulator, it is necessary to close the taps 22 and 23 according to scheme 2.
4.12.3. To flush the first impulse tube, it is necessary to open the valve 22 according to scheme 2 and wash it with a jet of water.
4.12.4. After flushing the first impulse tube, replace it and tighten the union nut.
4.12.5. To flush the second impulse tube, unscrew the union nut securing the second impulse tube of the differential pressure switch, and then disconnect the tube.
4.12.6. To flush the second impulse tube, use tap 23.
4.12.7. After flushing the second impulse tube, reattach the tube and tighten the union nut.
4.12.8. After cleaning the impulse pipes, open valves 22 and 23 according to scheme 2.
4.12.9. After opening valves 22 and 23 (Scheme 2), it is necessary to bleed air from the tubes using the union nuts of the differential pressure regulator. To do this, unscrew the union nut 1-2 turns and tighten it after air comes out of the impulse tube, tighten it. Repeat the operation for each of the impulse tubes in turn.
4.13. Checking manometers.
4.13.1. For work on calibration of manometers. Before removing them, it is necessary to close taps 2 and 3 according to diagram 2.
4.13.2. Plugs are inserted into the places where the pressure gauges are attached.
4.13.3. Verification tests of pressure gauges are carried out in accordance with GOST 2405-88 and the Method of Verification. "Pressure gauges, vacuum gauges, pressure and vacuum gauges, pressure gauges, draft gauges and thrust gauges" MI 2124-90.
4.13.4. Verification is carried out by specialized organizations whose metrological services are accredited by the Federal Agency for Technical Regulation and Metrology, on the basis of an agreement with the Managing Organization or with the Service.
4.13.5. Certified pressure gauges are installed in place.
4.13.6. After installing the pressure gauges, it is necessary to open valves 31 and 32 according to scheme 2.
4.13.7. The joints of pressure gauges and connecting pipes of the ACU system must be checked for leaks. The check is carried out visually within 1 minute.
4.13.8. After that, you should check the readings of all pressure gauges and record them in the Service log.
4.14. Checking thermometer sensors.
4.14.1. A portable reference thermometer and an ohmmeter are used to test thermometer sensors.
4.14.2. Using an ohmmeter, the resistance between the conductors of the temperature sensor under test is measured. The ohmmeter readings and the time they were taken are recorded. At the point where the temperature is taken by the appropriate sensor, the temperature readings are determined using a reference thermometer. The obtained resistance values are compared with the calculated resistance value for the given sensor and for the temperature determined by the reference thermometer.
4.14.3. If the readings of the temperature sensor do not correspond to the required values, the sensor must be replaced.
4.15. Checking the performance of indicator lamps.
4.15.1. It is necessary to turn on the three-pole switch 2S3 according to scheme 1 (Appendix 2).
4.15.2. Phase indication lamps L1, L2, L3 on the front panel of the control panel should light up.
4.15.4. Then you should press the "Check lamps" button on the front panel of the control panel. The lamps "pump 1" and "pump 2" and "pump alarm" should light up.
4.15.5. After that, apply voltage to the 2F10 controller according to scheme 1, then turn on the 3Q4 and 3Q13 machines (diagram 1).
4.15.6. Upon completion of the check of the condition of the lamps, an entry about this is recorded in the Service log.
5. The procedure for performing work on the technical
maintenance and repair of ACU
5.1. Preparation and organization of work on the maintenance and repair of ACU.
5.1.1. Development and coordination with the managing organization of the work schedule.
5.1.2. Access of the maintenance team to the technical room of the Serviced House.
5.1.3. Carrying out maintenance and repair work of the ACU.
5.1.4. Handover and acceptance of works on maintenance and repair of ACU to a representative of the Managing Organization.
5.1.5. Termination of access to the technical premises of the Serviced Home.
6. AUU repair
6.1. Repair of the ACU is carried out within the terms agreed between the Managing and Maintenance Organizations.
6.2. Work on the repair of ACU should be carried out by an energy engineer and a plumber of the 6th category, depending on the type of repair work.
6.3. For the delivery of workers, equipment and materials to the place of work and back, the delivery of a faulty AC to the repair facility and back to the installation site, a utility vehicle (Gazelle type) is used.
6.4. Units from the reserve fund are installed in place of the repaired AC units for the period of repair.
6.5. When dismantling a faulty AUU unit, the act records the readings at the time of dismantling, the number of the AUU unit and the reason for dismantling.
6.6. Works on the repair and preparation for verification of the ACU are carried out by the repair personnel of a specialized organization serving this ACU.
6.7. In case of failure of one of the elements of the ACU, they are replaced with similar ones from the reserve fund.
7. Labor protection
7.1.1. This Instruction determines the basic requirements for labor protection when performing maintenance and repair of AC.
7.1.2. Maintenance and repair of automated control units is allowed for persons who have reached the age of 18, who have passed a medical examination, theoretical and practical training, a knowledge test in the qualification commission with the assignment of an electrical safety group of at least III and who have received a certificate for admission to independent work.
7.1.3. A locksmith may be exposed to the following health hazards: electric shock; poisoning with toxic vapors and gases; thermal burns.
7.1.4. Periodic testing of the locksmith's knowledge is carried out at least once a year.
7.1.5. The employee is provided with overalls and safety shoes in accordance with applicable standards.
7.1.6. When working with electrical equipment, an employee must be provided with basic and additional protective equipment to ensure the safety of his work (dielectric gloves, a dielectric mat, tools with insulating handles, portable grounding, posters, etc.).
7.1.7. The employee must be able to use fire extinguishing equipment, know their location.
7.1.8. The safety of operation of automation devices located in fire and explosion hazardous areas must be ensured by the availability of appropriate protection systems.
8. Final provisions
8.1. When making changes or additions to normative and legal acts, building codes and rules, national and interstate standards or technical documentation governing the operating conditions of the AC, appropriate changes or additions are made to this Regulation.
Appendix 1
to the Regulations
PERIODICITY OF WORK FOR THE PERFORMANCE OF INDIVIDUAL TECHNICAL
OPERATIONS, USE OF MACHINES AND MECHANISMS
Name of work on | Qty | Qualification |
|
Inspection of AC units |
|||
AC power outage | Energy Engineer |
||
Inspection of pumping equipment, instrumentation, | Energy Engineer |
||
Checking incoming and supported | Energy Engineer |
||
Checking the operation of emergency protection and alarms, maintenance |
|||
Failover Test | Energy Engineer |
||
Checking the protective function of the drive | Energy Engineer |
||
Checking the indication lamps on the board | Energy Engineer |
||
Checking the operability of automation equipment for a heat point |
|||
Checking the ECL 301 controller | Energy Engineer |
||
Checking the drive | Energy Engineer |
||
Differential pressure switch test | Energy Engineer |
||
Checking temperature sensors | Energy Engineer |
||
Testing Direct Acting Regulators | Energy Engineer |
||
Checking the circulation pump | Energy Engineer |
||
Checking the performance of shutoff valves |
|||
Ease of movement test | plumber |
||
Leak test | plumber |
||
Flushing / replacement of filters, pressure switch impulse tubes |
|||
Washing/replacing the strainer | plumber |
||
Flushing/Replacing Impulse Tubing | plumber |
||
Venting the differential regulator | plumber |
||
Flushing/replacing relay impulse tubes | plumber |
||
Bleeding air from differential switch | plumber |
||
Calibration/inspection of instrumentation |
|||
Removal and installation of manometers | plumber |
||
Gauge verification | Energy Engineer |
||
Checking temperature sensors | Energy Engineer |
||
Setting ACU parameters |
|||
Activation of ACU sensor readings | Energy Engineer |
||
Analysis of ACU sensor readings | Energy Engineer |
||
Correction of ACU parameters | Energy Engineer |
||
Use of machines and mechanisms |
|||
Annex 2
to the Regulations
EXTERNAL AND INTERIOR VIEW OF THE CONTROL BOARD
HARDWARE SPECIFICATION
The figure is not shown.
Appendix 3
to the Regulations
HYDRAULIC SCHEME OF AUTOMATED CONTROL UNIT
SYSTEMS OF CENTRAL HEATING OF A RESIDENTIAL HOUSE (AUU)
The figure is not shown.
Appendix 4
to the Regulations
TYPICAL SPECIFICATION OF AUTOMATED CONTROL UNIT
CENTRAL HEATING SYSTEMS FOR RESIDENTIAL BUILDINGS
Name | Diameter, mm | ||||
Booster pump | |||||
Control valve for | By project | By project | |||
electric drive | AMV25, AMV55 | ||||
Magnetic filter | By project | By project | |||
Pressure regulator "up to | By project | By project | AVA, VFG-2 with | ||
Ball valve with | By project | By project | |||
Steel ball valve | By project | By project | |||
Cast iron check valve | By project | By project | |||
Flexible rubber insert | By project | By project | |||
Control rods for | By project | By project | |||
Pressure gauge Ru = 16 kgf / sq. | |||||
Thermometer 0-100 °C | |||||
Ball valve with | |||||
Ball valve PN = 40, | By project | By project | |||
Ball valve PN = 40, | By project | By project | |||
ECL301 controller | |||||
temperature sensor | |||||
temperature sensor | |||||
Sleeve for ESMU sensor | |||||
Differential pressure switch | |||||
damper tube for | |||||
Ball valve with |
The automated control unit of the 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 corrective pump, an electronic temperature controller that maintains a predetermined temperature schedule, 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.
check the price by phone
Quick order×
Quick order of products
Automated control unit of the heating system
Characteristics
| № type АУУ | 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 heating system 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 water regulator, in turn, is covered, reducing the supply of network water.
The operating mode of the automated control unit for the heating system in winter time round the clock, the temperature is maintained in accordance with temperature graph with temperature correction return water.
At the request of the customer, a mode for reducing the temperature in heated rooms at night, on weekends and holidays which results in 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. Total heat savings at automatic regulation can be up to 25% of the annual expense. During the summer period, the automated node does not work.
The plant produces automated control units for the heating system, their installation, adjustment, 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 and are ready to cooperate with you in any form, up to the departure of our specialists to the site.
Automated control unit of the 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 corrective pump, an electronic temperature controller that maintains a predetermined temperature schedule, 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.
AT automated control unit for the heating system control elements of the Danfoss company were installed, the pump - of the Grundfoss company. 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 water regulator, in turn, is covered, reducing the supply of network water.
Working mode automated heating system control unit in winter, round the clock, 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 for reducing the temperature in heated rooms at night, on weekends and holidays can be provided, which provides significant savings.
A decrease in 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 °С. 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.
A promising approach to resolving the current situation is the commissioning of automated heat points with a commercial heat metering unit, which reflects the actual consumption of thermal energy by the consumer and allows you to track the current and total heat consumption for a given period of time.
Target audience, solutions:
Commissioning of automated heat points with a commercial heat metering unit allows solving the following tasks:
JSC Energo:
- increased reliability of equipment operation, as a result, reduction of accidents and means for their elimination;
- accuracy of heating network adjustment;
- reducing the cost of water treatment;
- reduction of repair sites;
- high degree of dispatching and archiving.
housing and communal services, municipal management enterprise (MUP), management company (MC):
- no need for constant plumbing and operator intervention in the operation of the heating point;
- reduction of service personnel;
- payment for actually consumed thermal energy without losses;
- reduction of losses for feeding the system;
- release of free space;
- durability and high maintainability;
- comfort and ease of heat load management. Design organizations:
- strict compliance with the terms of reference;
- a wide range of circuit solutions;
- high degree of automation;
- big choice complete set of thermal points with engineering equipment;
- high energy efficiency. Industrial enterprises:
- a high degree of redundancy, especially important for continuous technological processes;
- accounting and exact observance of high-tech processes;
- the possibility of using condensate in the presence of process steam;
- temperature control by workshops;
- adjustable selection of hot water and steam;
- decrease in recharge, etc.
Description
Heat points are divided into:
- individual heat points (ITP) used to connect heating, ventilation, hot water supply systems and technological heat-using installations of one building or part of it;
- central heating substations (CHPs) performing the same functions as ITPs for two or more buildings.
One of the priority activities of CJSC "TeploKomplektMontazh" is the manufacture of block automated heat points using modern technologies, equipment and materials.
Heating points manufactured on a single frame in a modular design of high factory readiness, called block ones, hereinafter BTP, are increasingly used. BTP is a finished factory product designed to transfer thermal energy from a CHP or boiler house to a heating, ventilation and hot water supply system. The BTP includes the following equipment: heat exchangers, controller (electrical control panel), direct-acting regulators, control valves with electric drive, pumps, instrumentation (KIP), shut-off valves, etc. Instrumentation and sensors provide measurement and control of coolant parameters and issue signals to the controller about parameters going beyond the limits allowed values. The controller allows you to control the following BTP systems in automatic and manual mode:
Regulation of flow, temperature and pressure of the heat carrier from the heating network in accordance with the technical conditions of heat supply;
Temperature control of the heat carrier supplied to the heating system, taking into account the outdoor temperature, time of day and working day;
Heating water for hot water supply and maintaining the temperature within the limits of sanitary standards;
Protection of the circuits of the heating system and hot water supply from emptying during scheduled shutdowns for repairs or accidents in the networks;
Accumulation of DHW water, which allows compensating for peak consumption during peak hours;
- frequency regulation of the drive by pumps and protection against "dry running";
- control, notification and archiving of emergency situations, etc.
The execution of the BTP varies depending on the schemes used in each individual case for connecting heat consumption systems, the type of heat supply system, as well as the specific technical conditions of the project and the wishes of the customer.
Schemes of BTP connections to heat networks
On fig. 1-3 shows the most common schemes for connecting heat points to heat networks.
Application of shell and tube or plate heat exchangers in BTP?
The substations of most buildings are usually equipped with shell-and-tube heat exchangers and direct-acting hydraulic regulators. In most cases, this equipment has exhausted its resource, and also operates in modes that do not correspond to the calculated ones. The latter circumstance is due to the fact that the actual heat loads are currently maintained at a level significantly lower than the design one. The control equipment does not perform its functions in case of significant deviations from the design mode.
When reconstructing heat supply systems, it is recommended to use modern equipment, which is compact, provides for operation in a fully automatic mode and provides energy savings of up to 30%, compared with equipment used in the 60-70s. In modern heat points, an independent scheme for connecting heating and hot water supply systems is usually used, made on the basis of plate heat exchangers. To control thermal processes, electronic regulators and specialized controllers are used. Modern plate heat exchangers are several times lighter and smaller than shell-and-tube heat exchangers of the same capacity. The compactness and light weight of plate heat exchangers greatly facilitate the installation, maintenance and maintenance of the equipment of the heating point.
|
|  |
Recommendations for the selection of shell-and-tube and plate heat exchangers are given in SP 41-101-95. Design of thermal points. The calculation of plate heat exchangers is based on a system of criterion equations. However, before proceeding with the calculation of the heat exchanger, it is necessary to calculate the optimal distribution DHW loads between the stages of heaters and the temperature regime of each stage, taking into account the method of regulating the release of heat from the heat source and the schemes for connecting DHW heaters.
CJSC "TeploKomplektMontazh" has its own proven thermal and hydraulic calculation program, which allows you to select Funke brazed and collapsible plate heat exchangers that fully meet the requirements of the customer.
BTP produced by CJSC "TeploKomplektMontazh"
The basis of the BTP CJSC "TeploKomplektMontazh" is Funke collapsible plate heat exchangers, which have proven themselves in harsh Russian conditions. They are reliable, easy to maintain and durable. Heat meters are used as a node for commercial heat metering, which have an interface output to the upper control level and allow reading the consumed amount of heat. To maintain the set temperature in the hot water supply system, as well as to regulate the temperature of the coolant in the heating system, a two-circuit regulator is used. The control of the pumps, data collection from the heat meter, control of the regulator, control of the general condition of the BTP, communication with the upper level of control (dispatching) is taken over by the controller, which is compatible with a personal computer.
The regulator has two independent circuits for regulating the temperature of heat carriers. One provides temperature control in the heating system depending on the schedule, taking into account the outdoor temperature, time of day, day of the week, etc. The other maintains the set temperature in the hot water supply system. You can work with the device both locally, using the built-in keyboard and display panel, and remotely via the interface communication line.
The controller has several discrete inputs and outputs. Discrete inputs are used to receive signals from sensors related to pump operation, penetration into the premises of the BTP, fire, flooding, etc. All this information is delivered to the upper dispatching level. The discrete outputs of the controller control the operation of pumps and regulators according to any user algorithms specified at the design stage. It is possible to change these algorithms from the top management level.
The controller can be programmed to work with a heat meter, providing data on heat consumption to the control room. Through it, communication with the regulator is carried out. All instruments and communication equipment are mounted in a small control cabinet. Its placement is determined at the design stage.
In the vast majority of cases, when reconstructing old heat supply systems and creating new ones, it is advisable to use BTP. BTP, being assembled and tested in the factory, are distinguished by reliability. Installation of equipment is simplified and cheaper, which ultimately reduces the overall cost of renovation or new construction. Each BTP project of CJSC "TeploKomplektMontazh" is individual and takes into account all the features of the customer's heat point: the structure of heat consumption, hydraulic resistance, circuit solutions of heat points, allowable pressure losses in heat exchangers, room dimensions, quality of tap water and much more.
Types of activity of CJSC "TeploKomplektMontazh" in the field of BTP
CJSC "TeploKomplektMontazh" performs the following types of work in the field of BTP:
- preparation of terms of reference for the BTP project;
- BTP design;
- coordination of technical solutions for BTP projects;
- engineering support and project support;
- selection of the optimal option for equipment and automation of the BTP, taking into account all the requirements of the customer;
- installation of BTP;
- conducting commissioning;
- putting the heat point into operation;
- warranty and post-warranty maintenance of the heating point.
CJSC "TeploKomplektMontazh" successfully develops energy-efficient heat supply systems, engineering systems, and is also engaged in design, installation, reconstruction, automation, and provides warranty and post-warranty maintenance of BTP. A flexible system of discounts and a wide range of components distinguish BTP CJSC "TeploKomplektMontazh" from others. BTP CJSC "TeploKomplektMontazh" is a way to reduce energy costs and ensure maximum comfort.
Sincerely, ZAO
"TeplokomplektMontazh"
- Errors in the implementation process automatic node
- Additional requirements when commissioning a heating control unit
- Efficient use of an automated heating control unit
The automated control unit is a set of equipment and devices designed to provide automatic temperature control and coolant flow, which is performed at the inlet of each building in accordance with the temperature schedule required for a separate building. Adjustment can also be made according to the needs of the residents.
Knot of a binding of a water heater.
Among the advantages of ACU, when compared with elevator and heating units that have a fixed cross section of the through hole, is the possibility of varying the amount of coolant, which depends on the temperature of the water in the return and supply pipelines.
The automated control unit is usually installed alone for the entire building, which distinguishes it from the elevator unit, which is mounted on each section of the house.
In this case, the installation is carried out after the node, which takes into account the thermal energy of the system.
Image 1. Principal diagram of AHU with mixing pumps on the jumper for temperatures up to AHU t = 150-70 ˚C with one- and two-pipe heating systems with thermostats (P1 - P2 ≥ 12 m of water column).
The automated control unit is represented by a diagram illustrated in PICTURE 1. The diagram includes: an electronic unit (1), which is represented by a control panel; ambient temperature level sensor (2); temperature sensors in the coolant in the return and supply pipelines (3); flow control valve equipped with gear drive (4); differential pressure control valve (5); filter (6); circulation pump (7); check valve (8).
As the diagram shows, the control unit basically consists of 3 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 control unit includes a mixing pump with a check valve. A pair of pumps is used for mixing. In this case, pumps must be used that meet the requirements of the automatic unit: they must work alternately with a cycle of 6 hours. Control over their work should be carried out by the signal of the sensor, which is responsible for the pressure drop (the sensor is installed on the pumps).
Advantages and principle of operation of the automatic node
Heating and hot water control unit according to an open scheme.
The electronic part of the control unit includes an electronic unit or the so-called control panel. It is intended to provide control over automatic basis pumping and thermal mechanical equipment to maintain the required temperature schedule. With its help, the hydraulic regime schedule is supported, which should underlie the heating system of 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 regime. 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.
Back to index
Heating and hot water control unit independent scheme heating and hot water closed scheme.
Errors can occur 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. You should not miss the rules for the construction of an individual heat 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 center may occur, which, in turn, contradicts the rules for the operation of thermal installations. Thus, the installation of heating control units with a balancing valve can lead to high hydraulic resistance in the system, which will necessitate the replacement or reconstruction of thermal and mechanical equipment.
The non-complex installation of heating control units can also be called a mistake, which will certainly disrupt the established thermal and hydraulic balance in intra-quarter networks. This will cause deterioration of the heating system of almost every attached building. It is necessary to make thermal adjustment at the time of operation of the heating equipment.
Errors often occur during the input of the heating control unit at the design stage. This is due to the lack of work projects, the use standard project devoid of calculations, binding and selection of equipment to certain conditions. The result is a violation of heat supply regimes.
Back to index
Heating and hot water control unit according to an independent scheme.
The selected schemes for installing heating control units may not meet the requirements, which negatively affects the heat supply. It also happens that at the time the system is introduced, 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 the automation unit, it should be taken into account that the heating system could have previously undergone major repairs and reconstruction, during which the scheme could have been changed from one-pipe to two-pipe. Problems can arise when the calculation of the node is made for the system that was 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.
Scheme of an automated control unit for the heating system (AUU) at home.
It should be remembered that the 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 input process, it must be ensured backup power node, which will help to avoid stopping the central heating system in the event of a power outage. It is necessary to carry out adjustment and adjustment work, as well as noise reduction measures, maintenance of the unit must take place. It should be noted that failure to follow one or more rules can lead to non-heating of the system, and the absence of dampening equipment will lead to uncomfortable noise.
The introduction of the control unit must be accompanied by a check of the issued technical specifications, they must correspond to the actual data. And technical supervision should be carried out at each stage of work. After all work on the system has been completed, maintenance of the node should begin, which is carried out by a specialized organization. Otherwise, downtime of expensive equipment of an automated unit or its unqualified maintenance can lead to failure and other negative consequences, including the loss of technical documentation.
Back to index
An example of a diagram of a 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 that are directly connected to the city's heating main networks. Such use will also be effective in the conditions of end houses linked to the central heating substation, where there are insufficient pressure drops in the central heating with the mandatory 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 may also have decentralized hot water supply.
It is recommended to install automated nodes 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 commissioning of the entire system and associated equipment of the node must be carried out simultaneously.
It should be noted that with the installation of an automated node, the following measures will be effective:
- Implementation of the transfer of the central heating substation, which has a dependent connection scheme individual systems heating, on the one that will be independent. In this case, the installation of an expansion membrane tank at the heating point.
- Installation in the conditions of central heating, which is characterized by a dependent scheme for connecting equipment, similar to an automated control unit.
- Implementation of adjustment of intra-quarter central heating networks with the installation of throttle diaphragms and design nozzles at the inlet and distribution nodes.
- Implementation of the transfer of dead-end HW systems to circulation schemes.
http://youtu.be/M9jHsTv2A0Q
The operation of exemplary automated units has shown that the use of ACU together with balancing valves, thermostatic valves and carrying out insulation measures can save up to 37% of thermal energy, providing comfortable living conditions in each of the premises.
1poteply.ru
Installation of automatic control units
Installation of an automated control unit (AUU) of the central heating system allows you to provide:
Monitoring the fulfillment of the required temperature schedule of both the supply and return heat carriers depending on the outdoor temperature (prevention of overheating of the building);
Function coarse cleaning coolant supplied to the heating system;
From the foregoing, it follows that the main motivation for the use of ACU for a central heating system is, first of all, the technical need to ensure the operation of a modern energy-efficient heating system equipped with thermostats and balancing valves.
The use of temperature controllers and automatic balancing valves causes a significant difference modern systems from previously used unregulated heating systems.
Variable hydraulic mode of operation of the heating system, associated with the dynamics of the operation of thermostatic valves.
Installation of automatic balancing valves on the risers of the central heating system
For stable operation of the heating system in all modes of operation (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 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 operation of each other;
Elimination of the phenomenon of excessive consumption of the coolant along the risers of the heating system;
Significant simplification of work on adjustment (reconfiguration) of the heating system;
They stabilize the dynamic mode of operation of the heating system due to the response of radiator thermostats to temperature changes inside the living space.
Installation of radiator thermostats on heating appliances
Individual quantitative regulation of thermal energy can be implemented using temperature controllers on heating appliances.
Radiator thermostats are means of individual control 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 surpluses from people, household appliances, solar radiation, etc., directing them to the maximum for space heating and thereby saving thermal energy and funds for its payment;
Provide comfortable temperature indoors, providing the most comfortable living conditions;
Eliminate temperature control in the premises due to open vents, thereby preserving the thermal energy inside the premises as much as possible and reducing the consumption of hot water for the heating system.
With such integrated approach automation of the central heating system is achieved by:
Maximum heat savings;
High level comfort of living;
Interaction of all elements of the system;
Automated control unit (AUU)
Until now, an elevator unit for mixing the coolant was used at the entrance to the building. 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 compared to old systems;
Variable hydraulic mode of operation of the heating system, associated with the dynamics of the operation of thermostatic valves;
Increased requirements for maintaining the calculated pressure drop.
As a result, the use of elevator units in such systems in any of them 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 a period of significant cooling;
The elevator, as a device with a constant mixing ratio, does not prevent the risk of overheating of the return heat carrier temperature that occurs when the thermostats are triggered, and ensure that the temperature graph is maintained.
The above technical disadvantages of using the elevator indicate the need to replace it with automated control units (ACU), 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 carriers (prevention of overheating and hypothermia 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 of the coolant when the system is filled;
Visual control of parameters of temperature, pressure and differential pressure of the coolant at the inlet and outlet of the ACU;
Possibility of remote control of coolant parameters 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 operation of a modern energy-efficient heating system equipped with thermostats and other control devices.
Finished project bindings, depending on the further ownership of the operation, is agreed in heat supply organization.
The automated control unit consists of:
Pump with variable frequency drive;
Stop valves (ball valves);
Control valves (valve with electric drive);
Hydraulic pressure regulators of direct action (differential pressure or "to itself");
Pipe fittings (filters, check valves);
Instrumentation devices (pressure gauges, thermometers);
Outdoor and indoor air temperature sensors and differential pressure switch;
Control board with built-in controller.
Local regulation
High-quality local automatic control of the parameters of the coolant for the heating system can only be carried out if there is an electric circulation pump in its circuit.
For regulation, digital electronic controllers of the series are used. Based on the ratio of readings from the temperature sensors of the coolant and the outside air, these controllers control motor control valves through which the coolant is supplied from the heat supply system.
AUM has a large range of actuators - globe valves and three-way control valves, which are actuated electric drives.
Actuators differ in power and speed of movement of the stem, and the presence of a return spring that closes or opens the valve when the power fails. In order to stabilize the hydraulic regimes of external heating networks and to ensure the operation of actuators in the optimal pressure range, a differential pressure regulator is installed at the inlet to the building, or a pressure regulator “to itself” is installed 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 drop in them at the level required for optimal performance automatic radiator thermostats. The balancing valves for two-pipe heating systems used in the overhaul of apartment buildings 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 the impulse tube and a negative pulse from the return riser through the internal channels of the valve.
The impulse tube is connected to the supply riser through stop valve or shutoff valve. The balancing valve is reconfigurable. It can maintain a differential pressure between 0.05-0.25 or 0.2-0.4 bar.
The valve is adjusted to the pressure drop adopted in the project by rotating its spindle by a certain amount of turns from the closed position. The valve is also shut-off.
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 of the coolant in them.
Adjustment of balancing valves AB-QM is made by turning the ring intended for this purpose until the mark on it coincides with the number on the scale, which means the percentage (%) of the maximum flow rate according to the line of the table.
Radiator thermostats
Thermoregulators 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 thermoelement of the RTD type there is a closed corrugated container - a bellows, which is connected through the rod of the thermoelement to the spool of the control valve.
Bellows filled gaseous substance, changing 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 volume of gas and its pressure increase, the bellows is compressed, moving the stem with the spool towards the closing of the valve.
Radiator thermostatic valves for a two-pipe heating system
The RTD-N valve is a high hydraulic resistance valve with pre-assembly adjustment of its maximum throughput. Valves are used with a nominal diameter of 10 to 25 mm, straight and angle, nickel-plated.
Main technical characteristics of RTD-N valves:
Radiator thermostatic valves for a single-pipe heating system RTD-G is a low hydraulic resistance valve without a device to limit its throughput. Valves are used with a nominal diameter of 15 to 25 mm with a nickel-plated body. They also come in straight and angled versions.
The main technical characteristics of RTD-G valves are given below:
Installation and adjustment of automated heating systems
Automated systems heating do not require complex instrument adjustment. All adjustment of systems made in accordance with the project is reduced to the following:
1. Setting the presettings for the valves of radiator thermostats to the values of the throughput calculated and specified in the project (setting indexes). Adjustment is made without the use of any tool by turning the adjusting crown until the digital index on it coincides with the mark drilled on the valve body. From outside interference, the setting is hidden under the thermostatic element installed on the valve.
2. Setting the automatic balancing valve ASV-PV in two-pipe system heating to the required differential pressure. When shipped from the factory, the ASV-PV is set to a differential pressure of 10 kPa. A hex wrench is used for adjustment. The valve must first be fully opened by turning its handle counterclockwise. Then the key is inserted into the stem hole and rotated clockwise until it stops, after which the key is again turned counterclockwise by the number of turns corresponding to the required adjustable pressure drop. So, to set the ASV-PV valve with a setting range of 0.05–0.25 bar to a pressure drop of 15 kPa, the key must be turned by 10 turns, and for setting to 20 kPa, by 5 turns. 3. Setting the automatic balancing valve AB-QM in single pipe system heating for the estimated flow through the riser. Adjustment is made by manually turning the setting ring of the AB-QM valve until the flow rate, expressed as a percentage (%) of maximum flow through a valve of the accepted diameter, with a 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 your own temperature in each room, regardless of the temperature in other rooms. For reliable and accurate operation, do not block 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.
heatobmenniki64.ru
Automated control units for engineering systems: what you need to know when planning the overhaul of MKD
We will help you understand the concepts associated with the control units of heating and hot water systems, as well as the conditions and methods for using these units. After all, the inaccuracy of terminology can lead to confusion in determining, for example, the permitted type of work during the overhaul of MKD.
The equipment of the control unit reduces the consumption of thermal energy to the standard level when it enters the MKD in an increased volume. The uniform terminology should correctly reflect the functional load that such equipment carries. So far, there is no desired unity. And misunderstandings arise, for example, when the replacement of an outdated assembly with a modern automated one is called the modernization of the assembly. In this case, the obsolete node is not improved, that is, it is not upgraded, 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
The control nodes of any type of energy or resource include equipment that directs this energy (or resource) to consumers and regulates its parameters if necessary. Even a collector in the house, which receives a coolant with the parameters necessary for the heating system and directs it to various branches of this system, can be attributed to the thermal energy management unit.
Elevator units and automated control units can be installed in MKDs connected to a heating network with high coolant parameters (water superheated up to 150 °C). DHW parameters can also be adjusted.
In the elevator unit, the coolant parameters (temperature and pressure) are reduced to the specified values, that is, one of the main control functions is carried out - regulation.
In the automated control unit, feedback automation regulates the parameters of the heat carrier, providing the set air temperature in the room, regardless of the outside air temperature, and maintains the necessary pressure difference in the supply and return pipelines.
Automated control units for the heating system (AUU CO) can be of two types.
In ACU CO of the first type, the coolant temperature 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 this type of automated units a variety of names: heat control unit, weather control unit, weather control unit, mixing unit weather control, automated mixing unit, etc.
subtlety
Adjustment must be complete.
Some enterprises produce automated units that regulate only the temperature of the coolant. Lack of a pressure regulator can cause an accident.
AUU CO of the second type incorporates plate heat exchangers and forms independent system heating. Manufacturers often call them heat points. This is not true and causes confusion when placing orders.
In DHW systems of MKD, liquid temperature controllers (TRZh) can be installed, which regulate the temperature of the water, automated control units for the DHW system, which ensure the supply of water at a given temperature according to an independent scheme.
As you can see, not only automated nodes can be attributed to control nodes. And the opinion that outdated elevator units and TRZh are incompatible with this concept is wrong.
On formation misconception the wording in Part 2 of Art. 166 LC RF: "nodes for controlling and regulating the consumption of thermal energy, hot and cold water, gas." It cannot be called correct. Firstly, regulation is one of the functions of management, and this word should not have been used in the given context. Secondly, the word “consumption” can also be considered redundant: all the energy entering the node is consumed and measured by devices. At the same time, there is no information about the purpose to which the control unit directs thermal energy. It can be said more specifically: the control unit for thermal energy consumed for heating (or for hot water supply).
By managing thermal energy, we ultimately manage heating or hot water systems. Therefore, we will use the terms "heating system control unit" and "DHW 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 the full automation of the processes of regulating the parameters of the temperature regime of indoor air and water in hot water supply, as well as automation of heat consumption accounting.
Elevator nodes and TRZH, due to their design, cannot meet the above requirements. Therefore, we refer them to the control nodes of the previous (old) generation.
So, let's sum up the first results. There are four types of control units for heating and hot water systems. When choosing a control node, find out what type it is.
- Repair work on the water supply using a "sprayed pipe"
Can the names be trusted?
Manufacturers of control units based on mixing supply and return pipelines often refer to their products as weather regulators. This name absolutely does not 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 coolant. 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, we will 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 refer to their products as heat substations (TPs). Let's turn to regulatory documents.
To verify the incorrect identification of automated nodes with TP, we turn to SNiP 41-02-2003 and their updated version - SP 124.13330.2012.
SNiP 41-02-2003 "Heat Networks" considers a heating point as a separate room that meets special requirements, which houses a set of equipment for connecting consumers of thermal energy to the heating network and giving this energy the specified parameters for temperature and pressure.
In SP 124.13330.2012, a heating point is defined as a facility with a set of equipment that allows changing the thermal and hydraulic regime of the heat carrier, accounting for and regulating the consumption of thermal 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 for the technical operation of thermal power plants (hereinafter referred to as the Rules), TP is a complex of devices located in a separate room that provides connection to a heating network, control of heat distribution modes and regulation of coolant parameters.
In all cases, the TP links together the complex of equipment and the room in which it is located.
SNiP subdivide heating points into separate, attached to buildings and built into buildings. In MKD, TPs are usually built-in.
The heat point can be group and individual - serve one building or part of the building.
Now we formulate a correct definition.
An individual heating point (ITP) is a room in which a set of equipment is installed for connecting to a heating network and supplying consumers with an MKD or one of its parts of a coolant with regulation of its thermal and hydraulic regime to give the parameters of the coolant a given value for temperature and pressure.
In this definition of ITP, the main importance is given 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 incorrectness of using the concepts of ITP, TP, and the like to denote automated control units for heating and hot water systems manufactured at various enterprises.
Let us also specify the name of the control unit of the type in question: an automated unit (with heat exchangers) for controlling the heating system. Manufacturers may indicate their own product name.
- On the situation in the sectors of heat supply, water supply and sanitation
How to qualify work with the control node
Certain works are associated with the use of automated control nodes:
- installation of the 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 design unit with a new generation unit.
Let us clarify what meaning is invested in each of the listed works.
Installation of a control unit implies its absence and the need to install it in an MKD. Such a situation may arise, for example, when two or more houses are connected to one elevator unit (houses on a coupler) and it is necessary to install an elevator unit on each house in order to be able to separately account for the consumption of heat energy and increase responsibility for the operation of the entire heating system in each house. You can install any control node.
Repair of the engineering systems control unit ensures the elimination of physical wear and tear with the possibility of partial elimination of obsolescence.
Replacing a node with a similar one that does not have physical wear implies the same result as when repairing the node, and can be done instead of repair.
Modernization of the node means its renewal, improvement with the complete elimination of physical and partially obsolescence within the existing structure of the node. Both the direct improvement of an existing node, and its replacement with an improved node - these are all types of modernization. An example is the replacement of an elevator assembly with a similar one with adjustable nozzle elevator.
Replacement of outdated design units with new generation units involves the installation of automated control units for heating and hot water systems instead of elevator units and TRZH. In this case, physical and moral deterioration is completely eliminated.
All of these are independent activities. 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 given.
Why you need to define the type of work
Why is it so important to attribute this or that work related to control nodes to a certain type of independent work? This is of fundamental importance when performing a selective overhaul. Such repairs are carried out from the funds of the capital repairs fund, formed from the mandatory contributions of the owners of the premises to the MKD.
The list of works on selective overhaul is given in Part 1 of Art. 166 ZhK RF. The above independent works are not included in it. However, in Part 2 of Art. 166 of the Housing Code of the Russian Federation it is said that the subject of the Russian Federation can supplement this list with other works by the relevant law. At the same time, it becomes fundamentally important that the wording of the work included in the list corresponds to the nature of the planned use of the control unit. Simply put, if the node was to be upgraded, then the list should include work with exactly the same name.
St. Petersburg has expanded the list of overhaul works
In the law of St. Petersburg dated December 11, 2013 No. 690–120 “On the overhaul of common property in apartment buildings Petersburg” in 2016, the following independent work was included in the list of selective overhaul works: installation of control units and regulation of thermal energy, hot and cold water, electric energy, gas.
The wording is completely borrowed from the Housing Code of the Russian Federation with all the inaccuracies noted by us earlier. At the same time, it clearly indicates the possibility of installing a control and regulation unit for thermal energy, i.e. a control unit for the heating system and the hot water supply system, during selective overhauls carried out in accordance with this law.
The need to perform such independent work is due to the desire to disconnect the houses on the hitch, i.e. houses, the heating systems of which receive the coolant from one elevator unit, and install their own heating system control unit on each house.
The amendment made to the law of St. Petersburg allows you 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 overhaul fund.
- Credit in the morning - overhaul in the MKD in the evening
Automated mixing units, which do not include a pressure regulator, are not recommended for use in high-temperature heat supply networks. Automated DHW system control units should only be installed with heat exchangers forming a closed DHW system.
findings
- The control nodes include all nodes that direct the energy carrier to the heating or hot water system with the regulation of its parameters, from outdated elevators and TRZh to modern automated nodes.
- Considering the proposals of manufacturers and suppliers of automated control units, it is necessary to beautiful names weather regulators and heating points to recognize which of the following types of units the proposed product belongs to:
- automated mixing unit for heating system control;
- an automated unit with heat exchangers for controlling a heating system or a hot water supply system.
After determining the type of automated unit, one should study in detail its purpose, technical characteristics, cost of the product and installation work, operating conditions, frequency of repair and replacement of equipment, operating costs and other factors.
- When deciding on the use of an automated control unit for engineering systems during a selective overhaul of an 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 constituent entity of the Russian Federation in the list of work on capital MKD repair. Otherwise, the selected type of work on the use of the control unit will not be paid at the expense of the capital repair fund.
www.gkh.ru
Automated heating system control unit
Brief description of the device
The automated control unit of the 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 corrective pump, an electronic temperature controller that maintains a predetermined temperature schedule, 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 heating system 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 water regulator, in turn, is covered, reducing the supply of network 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 correction 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 °С. 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.
The plant manufactures automated control units for the heating system, their installation, adjustment, 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.
Specifications heating radiators