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BS EN 834:2013:2015 Edition

BS EN 834:2013:2015 Edition

$167.15

Heat cost allocators for the determination of the consumption of room heating radiators. Appliances with electrical energy supply

Published By Publication Date Number of Pages
BSI 2015 36
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NOTE See Clause 3 for a definition of the terms used below.

This European standard applies to heat cost allocators which are used to capture the proportionate thermal output of radiators in consumer units.

If an account unit comprises consumer units of different types (e.g. technically different types of heating systems or differences due to the consumer behaviour, e.g. industrial plants as opposed to private apartments), it could be necessary to divide this account unit into groups of users.

Heat cost allocators enable the determination of the heat consumption only of each radiator in a consumer unit as a share of the total heat consumption of the account unit or user group (see Clause 4); it is therefore necessary to determine this total heat consumption either by measuring the consumed fuel quantity or the amount of heat delivered (the latter by means of a heat meter, for example).

For the appropriate use of the heat cost allocators in accordance with this standard, the heating system needs to:

  • correspond to the state of the art at the time of installation of the heat cost allocators;

  • be operated in accordance with the state of the art (see A.2).

This standard specifies that heat cost allocators shall not be used for heating systems where the temperature of the heating system falls below or exceeds the temperature limits of the heat cost allocators, where the rating factor for the thermal output, KQ, cannot be clearly specified or where the heating surface is inaccessible. This applies usually to the following heating systems:

  • correspond to floor heating;

  • radiant ceiling heating;

  • flap-controlled radiators;

  • radiators with ventilators;

  • fan-assisted air heaters;

  • heating systems with steam-operated radiators.

PDF Catalog

PDF Pages PDF Title
7 1 Scope
8 2 Normative references
3 Terms and definitions
13 4 Functional principle and measurement methods
14 5 General specifications
5.1 Base condition
15 5.2 c-value
5.3 Rating factors
5.3.1 Rating factor KQ for the thermal output of the radiator
16 5.3.2 Rating factor KC for the thermal coupling of the sensors
5.3.3 Resulting rating factor K
5.4 Calendar function
17 6 Requirements for heat cost allocators
6.1 Requirements concerning temperature stress
6.2 Storage temperature
6.3 Start of counting
6.4 Idle counting rate
6.5 Temperature sensors
18 6.6 Calculator/central processing unit
6.7 Auxiliary power supply
6.8 Overflow of the display
6.9 Display resolution
6.10 Functional check
19 6.11 Limits of relative display deviation
6.12 Ageing
6.13 Electrical, electrostatic and magnetic influences
6.14 Thermal impact on heat cost allocators operating in accordance with the single-sensor measurement method
6.15 Thermal impact on heat cost allocators operating in accordance with the two-sensor measurement method
20 6.16 Thermal impact on other devices or components
6.17 Impact on transmission systems
6.18 Sealing
6.19 Calendar function
6.20 Taking into account operating conditions
21 7 Requirements for use and installation
7.1 Temperature limits
7.1.1 General
7.1.2 Single-sensor measurement method
7.1.3 Two-sensor measuring method
7.1.4 Multiple-sensor measurement method
7.2 Attachment of the sensors
22 7.3 Attachment position of the sensors
7.4 Connecting cable installation
7.5 Uniformity of heat cost allocators
23 8 Rating requirements
8.1 Rating factor KQ
8.2 Rating factor KC
8.3 Rating factor KT
8.4 Resulting rating factor K
8.5 c-value
24 9 Requirements for maintenance and reading
9.1 Visual reading
9.2 Close-range reading
9.3 Remote reading
10 Testing
10.1 General
25 10.2 Test documents
10.3 Test report
10.4 Test protocols
11 Test procedures
11.1 Construction test
11.2 Sealing test
11.3 Temperature durability test
26 11.4 Test for compliance with the limits of the relative display deviation
11.5 Ageing resistance test
11.6 Test of the start of counting at normal operation and also, for heat cost allocators with room temperature sensors, at operation with thermal impact
27 11.7 Test of the idle counting rate
11.8 Test of the counting rate in the case of thermal impact
28 11.9 Test for external influences
11.10 Test of c-values, procedure
11.11 Test of c-values, scope of testing
11.12 Test of rating factor KQ
29 11.13 Test of rating factor KC
12 Marking
30 Annex A (informative) Information and recommendations
A.1 General
A.2 Heating systems
A.3 Recommended field of application
31 A.4 Heat emission not controllable by the consumer
A.5 Additional corrections
32 A.6 Documentation of the relationship between the counting rate and the thermal output

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BS EN 834:2013
$167.15