Metering Electronic heat cost allocator WHE5.. WHE6 Electronic device for heat cost allocation based on measuring the heat output from radiators.
Application The electronic heat cost allocators WHE5.. and WHE6.. are designed for decentralized installation and used when heating costs must be allocated to several consumers based on actual consumption. The temperatures are acquired by one (radiator) or two sensors (radiator and room temperature sensor). In two-sensor mode, the actual temperature difference between room temperature and radiator temperature is acquired, while in onesensor mode, a constant value for the room temperature is predefined.
Functions Depending on the type of communication, the heat cost allocators are classified as follows: ● No communication interface ● With optical communication interface (optional) ● With RF interface No communication interface Heat cost allocators without communication interface WHE50.. must be read visually on site and the measuring results must be manually recorded. They are especially suited for systems that do not require complex data evaluations or particularly fast readout processes.
Function control The heat cost allocator performs a self-test every 4 minutes. An error message "Err x" is displayed if the error lasts for 5 consecutive measuring cycles (20 minutes). After the error has been registered and shown on the display, the device stops measuring. The date the error occurred is stored internally. Display device type Device states, consumption values and measuring system information are displayed in a loop.
Display sleep mode The devices are delivered ex factory in sleep mode. Measuring operation is inactive.
Radio system activated (AMR/walk-by) S-mode: Walk-by and AMR C-mode: Walk-by and AMR The transmission of installation telegrams is indicated on this display. 30 S Display sequence: InSt8, InSt7, ... InSt1 Commissioning This display appears after snapping the device onto the mounting plate. Then, the display changes to the normal mode display loop. 3S Remote sensor identification The meter has detected a remote sensor and adjusts its measuring behavior accordingly.
Special functions Continuous counting (without zeroing) The meter status is not "zeroed" at the due date, but continues to count like a roller type counter. As a default, this option is set to "No" (counter reading will be reset to "0" at the due date) Display battery warning The heat cost allocator features service life monitoring.
RF features in C-mode Features of the heat cost allocators in C-mode: RF system Parallel transmission of data telegrams ● AMR ● Walk-by Increased radio power (10 dBm) Transmission behavior AMR telegrams Every 7.5 minutes, 24 hours a day, 365 days a year Data telegrams with consumption values Walk-by telegrams Every 112 seconds, 10 hours a day (from 08:00 to 18:00 o’clock) 365 days a year Current consumption values and 13 statistical values Change of mode Using the ACT50-HCA (V2.
Scope of delivery The heat cost allocators are delivered in packages of 50 units (1 packaging unit). Note The heat cost allocators are delivered without instructions and without heat conductor. Accessories Component Stock No. Order number Type Threaded hoop (pipe 18 to 30 mm) JXF:FKT0014 FKT0014 Threaded hoop (pipe up to 17 mm) JXF:FKT0004 FKT0004 Shank nut M3 x 3 JXF:FNM0002 FNM0002 Shank nut M3 x 6 JXF:FNM0003 FNM0003 Shank nut M3 x 9.
Standard parts Stock No. Order number Type Cross-slot screw M4 x 40 JXF:FNR0004 FNR0004 Cross-slot screw M4 x 50 JXF:FNR0005 FNR0005 Cross-slot screw M4 x 70 JXF:FNR0006 FNR0006 Welding stud M3 x 8 JXF:FKT0013 FKT0013 Welding stud M3 x 12 JXF:FKT0011 FKT0011 Welding stud M3 x 15 JXF:FKT0012 FKT0012 Hexagon nut M4 JXF:FNM0004 FNM0004 Self-locking nut with serrated bearing M3 JXF:FNM0005 FNM0005 Stock No. Order number Type Dowel 6 mm JXF:FNU0001 FNU0001 Remote sensor set 1.
Notes Engineering ● ● ● ● The heat cost allocator is designed for wall mounting Install the device in accordance with the System Manual Observe the permissible ambient conditions The heat cost allocator must not be subjected to dripping water Note For information about project planning and installation, please refer to the System Manual. Installation Attach the heat cost allocator to each radiator with the appropriate mounting materials (listed under accessories).
Technical data Power supply Battery type 3 V lithium battery Battery life Typically 10 years Functional data RF: Radio frequency 868 MHz with <0.1% duty cycle Transmission power: ● S-mode ● C-mode Radio protocol 2.5 dBm (typically) 7.
Norms and standards Product standard DIN EN 834 Heat cost allocator to acquire consumption data for room heating areas EU conformity (CE) CE2T2886xx 1) 1) Documents can be downloaded at http://www.siemens.com/bt/download Environmental compatibility Environmental Declaration CE2E2886xx 1) contains data on environmental-compatible product design and assessment (RoHS compliance, compositions, packaging, environmental benefits and disposal) 1) Documents can be downloaded at http://www.siemens.
Dimensions Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 CH-6301 Zug Tel. +41 41-724 24 24 www.siemens.com/buildingtechnologies 14 Siemens Building Technologies Document ID A6V10786229_en--_e Edition 2017-05-12 © Siemens Switzerland Ltd, 2016 Technical specifications and availability subject to change without notice.
