Individual heat meter in indiv apartment. Radiator counters-distributors, individual accounting. Kit for mounting the meter-distributor on convectors

counter distributor Indiv 5R Danfoss comes with a reader unit with an installed radio module that operates at an authorized frequency of 868.95 MHz. This system is used for wireless access to the meter and for remote transmission of accumulated readings to network nodes in INDIV AMR automated measuring radio systems. The distributor device determines the percentage of the total heat energy consumed by the house, measured through the collective general house heat meter, attributable to a specific radiator.

The principle of counting readings - the distribution of general building processed heat energy based on instrument readings individual accounting mounted on separate radiators.

The INDIV 5R distributor meter is easy to install as it has a compact size and a universal mount. Installs on almost any type heating systems. Various mounting kits are available for attaching the distributor. During installation, the housing is fixed on mounting plate thermal adapter using a special seal-latch, which does not allow unauthorized access to the device and fasteners.

It collects consumption readings in several stages, starting from the last control date up to the indication of the worked coefficient for the year. Continuous testing to ensure ease of use with storage and transmission of error messages. Displays the checksum of the results, both current and for a specific day.

Heat distributors are still not widely used in our country, although in Europe they are used in industrial scale, since the 70s, and the number installed appliances heat distributors number in the tens of millions. We do not yet produce these devices, although we already have experience in their use.

The principle of operation of distributors.

The photo shows a thermostatic regulator and a radiator installed in the apartment. The distributor every 3-4 minutes measures the surface temperature of the radiator at one specific point and records the temperature difference between the surface of the radiator and the air in the room into a non-volatile memory. As a result, heat corresponds to the amount of heat given off by the radiator over the past period, measured in conventional units. It is conditional, the readings of the heat distributor during recalculation are multiplied by radiator coefficient corresponding to the type and size of the heater.

At the same temperature on the surface of a large and small radiator and at the same temperature in the room, the readings of the distributors will be the same, but after all, a large heater will give more heat? To take this situation into account, the radiator coefficient is used. Each manufacturer has tables of radiator coefficients for their devices for all types of manufactured radiators. Radiator coefficient tables include computer programs for the recalculation of payments, and the coefficients are automatically taken into account in the calculation.

But what about our homemade radiators or battery assemblies, when the residents themselves add sections to the existing radiator, while some of them practically do not heat. There is only one conclusion, you will have to get rid of homemade products.

The cost of a heat distributor and payment for heat.

The cost of a heat distributor is about 10 times less than the cost of an apartment heat meter. Distributors are easily installed on any type of heating devices. This is the main advantage. Due to this, the cost of a set of devices for an apartment is acceptable even if there are several risers in the apartment.

Heat distributors are suitable for all heating systems.

Calculation of payment for heating according to the readings of the heat distributors is the distribution of the total amount paid to the heat supplier between individual apartments in proportion to the readings of the radiator distributors. At the same time, the residents of the apartments monthly, during the year, make payments at fixed pre-calculated and approved rates, and settlements with the heat energy supplier are made according to

Once or twice a year, readings are taken in apartments, and the total amount is distributed according to the readings received. For each tenant, a balance is drawn between the amount of his payments at provisional rates and his estimated payment. The amount received is used to offset payments for heating for the next year.

Thus, in the presence of any type of individual heat metering devices, payments for heating are made dependent on actual heat consumption in apartments.

Finally, compare installation costs radiator thermostats and heat distributors.

Equipment and costs, Price per piece (at the rate of $ 1 - 60 rubles)

• Distribution sensor for individual metering INDIV-3 with visual reading from the LCD display
• Sensor-distributor for individual accounting INDIV-3R with remote wireless data transmission (radio)
• Installing a thermostat and measuring sensor
• Annual apartment settlement services

In the table, the costs for the installation of radiator thermostats and heat distributors

Calibration interval of heat distributors is 10 years. Apartment heat meters - 5 years.

The payback period for installing heat distributors and radiator thermostats for two-room apartment 1 year, with a service life of a thermostat of 30 years, and a heat distributor of 10 years. For economical residents, this period will be even shorter.

Remember the basic rules for organizing apartment accounting using heat distributors:

• on heating appliances without fail thermostatic controls must be installed.
• At least 75% of the heated premises must be equipped with thermostats and heat distributors in the building.
• the actual cost of thermal energy for heating a residential building should be made by a common house heat meter.
• in the housing organization, recalculations of payments for residents should be organized according to the readings of common house and apartment meters.

Paramonov Yu.O. LLC enterprise "Energostrom" 2017.

Devices for the distribution of thermal energy electronic INDIV-5, INDIV-5R, INDIV-5R-1 are designed to measure the temperature of a heat-receiving metal plate fixed on the surface of a heating device and present the measurement result as a cumulative total in the form of an integral over time (formula /1/), proportional to the heat energy supplied by the heating device.

Description

The principle of operation of devices for distributing electronic thermal energy INDIV-5, INDIV-5R, INDIV-5R-1 is based on measuring the temperature tm of a heat-receiving metal plate fixed on the surface of the heater. The measured temperature is used to calculate the temperature difference At =(tm - 20) °C and calculate the time integral. The device displays the obtained dimensionless integral value, on the basis of which the relative share of the heat transfer of this heater in the collective heating system can be calculated. Electronic heat distribution devices INDIV-5, INDIV-5R, INDIV-5R-1 are shown in Figure 1. All modifications have an identical appearance.

Picture 1.

The design of devices for distributing electronic heat energy INDIV-5, INDIV-5R, INDIV-5R-1 is a non-separable plastic case with a transparent display window on the front wall. The temperature sensor is located either inside the housing near the rear wall and is connected to a heat conductor, which is pressed during installation against a heat-receiving metal plate made of aluminum alloy, or on the fastening washer of a remote cable 1.5 or 2.5 m long. The heat-receiving metal plate is provided with holes for fastening to the surface of the heater. Versions INDIV-5R and INDIV-5R-1 have a built-in radio module (transmitter) for transferring recorded data to the system radio network via unidirectional radio communication (wireless M-Bus compatible with EN 13757-3 and EN 13757-4 standards). Versions INDIV-5R and INDIV-5R-1 differ in the composition of the mounting kit.

Devices for the distribution of thermal energy electronic INDIV-5, INDIV-5R, INDIV-5R-1 include a power source and a microprocessor with a quartz oscillator that measures the resistance of the temperature sensor, the necessary calculations and control of the alphanumeric liquid crystal display.

Indication of electronic heat distribution devices INDIV-5,

INDIV-5R, INDIV-5R-1 is formed in accordance with the algorithm:

rt(t) - 20 li5

and if t< tz то R = 0.

where tz - starting temperature - temperature above which the integration process begins, °С,

R - slew rate of displayed reading, 1/h

Time in hours.

For fixing electronic heat distribution devices INDIV-5, INDIV-5R, INDIV-5R-1 with internal thermometer on radiators various designs specialized mounting kits are provided. During installation, the body is fixed on a heat-receiving metal plate with a special seal-latch, which excludes unauthorized access to the distributor's organs and fastening elements. The remote thermometer washer is attached to the heater with a screw and closed with a protective cover, and the housing is installed on the wall of the room.

The display of the device in the measurement mode performs an automatic change of readings and displays the following values ​​(in brackets, the duration of the indication in seconds is indicated):

Current slew rate of displayed sample (2 s)

Display test (all included) (0.5 s)

Display test (all off) (0.5 s)

Date (2 s)

Integral value for the current date (flashing) (5 s)

Checksum (2 s)

Verification factor (1 s)

Information about the presence and type of the radio channel, the algorithm used and the type of sensor (built-in or remote).

Depending on the type of operation, the display also shows various special indications that indicate certain device states, including error codes.

The INDIV-5, INDIV-5R, INDIV-5R-1 devices can be used with the following types heating appliances:

Plate radiators;

Tubular radiators;

Panel radiators with horizontal and vertical water flow;

Radiators with internal dampers in the pipe;

Convectors.

Software

Internal (embedded) software(software) is set at the time of manufacture and cannot be read or modified.

Table 1

if t > tz then R =

The checksum of the executable code is available only to the manufacturer.

Firmware protection level against unintentional and intentional modifications

And according to MI 3286-2010.

External software installed on a PC is not metrologically significant and is intended for data visualization, storage and processing.

Specifications

Metrological and specifications devices INDIV-5, INDIV-5R, INDIV-5R-1 are shown in Table 2.

table 2

Characteristic	Characteristic value
Heater temperature range (temperature at the installation point)	30 to 105 °C
Start temperature tz	40 °С - June, July and August 30 °С - in all other months of the year
Limits of permissible relative measurement error, %	at 5 °С< At <10 °C 12 %
	at 10 °С< At <15 °C 8 %
	at 15 °C< At <40 °C 5 %
	at 40 °C< At 3 %
Weight, no more
	3 volt lithium battery
Display type	liquid crystal display 5 digits (00000...99999)
Storage and transport temperature	from - 60 to + 50 °C
Service life (typical)	10 years + 15 months

Type approval mark

The type approval mark is applied by typography to the passport and the title page of the instruction manual, as well as by offset printing to the body of the INDIV-5, INDIV-5R, INDIV-5R-1 device.

Completeness

The completeness of the measuring instrument is given in Table 3. Table 3

Verification

is carried out according to the method given in section 9 "Verification" of the document "Devices for the distribution of thermal energy electronic INDIV-5, INDIV-5R, INDIV-5R-1. Operation manual”, approved by the GCI SI FBU “Rostest - Moscow” on 12.07.2012.

Basic means of verification:

Climate chamber. Temperature range from 15 to 80 °С; temperature maintenance instability ± 0.5 °С;

Resistance thermometer platinum vibration resistant reference PTSV of the 3rd category; Multichannel precision temperature meter MIT 8.10, At= ± (0.0035 + 10-5 t) °C

Information about measurement methods

Information about measurement methods is contained in the document “Devices for the distribution of thermal energy electronic INDIV-5, INDIV-5R, INDIV-5R-1. Manual".

Regulatory and technical documents that establish requirements for electronic heat distribution devices INDIV-5, INDIV-5R, INDIV-5R-1

1 GOST R 52931-2008 “Instruments for monitoring and regulating technological processes. General technical conditions.»

2 Technical documentation of the manufacturer Danfoss GmbH, Germany.

in the implementation of trade and commodity exchange operations

The Indiv 5 meter and its improved modification Indiv 5r are radiator distributors that allow you to organize heat metering for each individual apartment. These devices are intended for buildings with vertical heating distribution, that is, for almost all modern multi-storey buildings.

Operating principle

The Indiv 5 heat meter measures and registers the temperature difference between the radiator and the air in the room. The temperature sensor is built into the Danfoss Indiv 5 case. The air temperature is programmed as a constant value of 20° C. This averaging introduces a certain error in the readings of the Danfoss Indiv 5, however, this is not such a serious problem. But the rest of the calculations will be made with maximum accuracy, even if the Indiv 5 distributor meter is covered with thermal insulation.

The data is displayed on the LCD screen. With how to take readings of Indiv 5, there will be no problems even for a person who is far from technology. The monitor alternately displays:

• up-to-date information;
• data on the results of the previous time period;
• end date of the current Danfoss Indiv 5r cycle;
• calibration factor;
• checksum, etc.

All calculations are automatically carried out by the AMR software provided by the management company on whose balance sheet the house is located.

Installing a Danfoss heat meter on a radiator is not very difficult. The device is mounted on the surface of the heating equipment using a mounting kit. It is important to strictly adhere to the Indiv 5 manufacturer's instructions regarding installation rules for specific devices. Sometimes a situation arises when it is not possible to fix the radiator meter distributor Indiv 5 on the surface of the battery. In such cases, you will have to install a remote sensor with a connecting cable and turn off the built-in one. This solution is usually intended for units with a casing.

The price of the Indiv 5 dispenser installed on the counter will not hit your budget too hard. However, it is worth purchasing a device only when the housing company has organized an appropriate recalculation according to the readings of individual and common house metering devices. To do this, it is necessary that such regulators and distributors stand in at least half of the apartments. If you are interested in where to buy Indiv 5r in Moscow and other useful information on equipment, we are waiting for you on our website.