Abstract

Metering devices for thermal energy (heat and cooling meters) are only working correctly and consistently if the system design considers the minimum and maximum ratings for temperature, temperature difference and flow rate according to the approved ranges. The metering device shall be selected for the approved legal range and the application area. The thermal energy meter shall be installed according to the valid requirements. During commissioning the thermal energy meter is checked for both correct installation and full functionality and afterwards sealed against unauthorized opening.According to the European harmonised standard EN 1434-6 a commissioning is obligatory to ensure that the metering device accurately measures the planned or predicted consumption.Installing the metering devices or their sub-assemblies incorrectly (e.g. an incorrect combination of temperature sensors with non-approved pockets) does not guarantee the measuring accuracy. Hence, themeasurement deviations may exceed the permissible error limits. National calibration laws state that themetering point operator shall ensure that the metering device is set up, connected, handled and maintained correctly to guarantee the measuring accuracy. Incorrect measurements result in bills that cannot be used in business transactions.The metering point operator is in district heating networks responsible for a proper installation andcommissioning of the metering devices. The metering point operator can also delegate this task to a service company. The building owner or the building owner's representative (e.g. a metering service company) is in sub metering applications responsible for a proper installation and commissioning of the metering devices.The EN 1434 standard provides technical principles and practical advice in selecting, installing andcommissioning of thermal energy meters. However, because a standard cannot cover all areas completely, this report shall assist users of thermal energy meters.

Begin

2019-06-12

WI

00176037

Planned document number

DIN CEN/TR 13582

Project number

04112014

Responsible national committee

NA 041-03-05 AA - Heatmeters (Mirror committee CEN/TC 176)  

Responsible european committee

CEN/TC 176/WG 2 - Thermal energy meters - Requirements, test methods and technical editing