Technical design - Data Sheet - WHE502-D10 - WHE542-0001S - WHE542-D100S - WHE542-D291S - WHE632-D292C

Heat cost allocators are delivered as a one- or two-sensor devices. The following valuation factors are set when the units are delivered:

K_cHF = 1.28

K_c = 2.50

K_Q = 1000

Exp. = 1.15

If the heat cost allocator does not work with a product scale, the consumption value (VW) must be calculated before billing, based on the readout value (AW) and the radiator-specific K-values (K_c, K_cHF and K_Q).

One-sensor device

VW = 7.529 * 10^-4 * AW * K_Q * K_cHF^1.15

Two-sensor device

VW = 3.486 * 10^-4 * AW * K_Q * K_c^1.15

The respective K_C values can be determined by using the K_C value database.

The following parameters are factory set:

Zeroing after the due date

Yes

Counting progress even after a device opening was identified

Opening display as clear text

Yes

Conversion of the consumption values is not performed if the device parameters are changed

Settings:

Sensing type

From a two to one-sensor measuring system

K_C/K_Q

Valuation factors for calculating the heat output of a radiator (depending on the device’s algorithm and the sensor type)

Next due date

Day the annual value is stored

Device name/device password

Device access data to prevent unauthorized device access

RF mode

S-mode or C-mode (depending on the variant)

Continuous counting (without zeroing)

The meter status is not "zeroed" at the due date, but continues to count like a roller type counter. This option is set by default to "No" (counter reading will be reset to "0" at the due date)

Display battery warning

The heat cost allocator features service life monitoring. An optical message "bat00" displays if the battery service life has expired

Display meter readings in case of errors

The units accumulated until the heat cost allocator fails displays on the heat cost allocator as a counter reading.

The option is set by default to "No", i.e. the consumption values are no longer displayed as soon as an error is registered. You can read, however, to determine whether to user the values (or not)

Opening display as clear text

An identified device opening is displayed as "c OPEn", alternating with the current value or the value of the previous year (old value) as a clear text message on the display of the heat cost allocator.

If this option is set to "No", a device opening can be identified by the display of the icon "c" on all displays (discrete display)

Summer switch-off

Summer switch-off is activated by setting a date for the start and the end of summer switch-off. If active, the heat cost allocator records no consumption values during this period of time

RF system

Parallel transmission of data telegrams

• AMR
• Walk-by

Transmission delay (Offset)

• Time delay for sending out telegrams after the due date
• Time delay for sending out telegrams after the start of the month in days (Default = 0 days)

Transmission-free days

A maximum of 2 weekdays – selected from Friday, Saturday and Sunday – can be defined as transmission-free days. At least 1 day of the week must be set (default = Sunday)

Transmission response

AMR telegrams

Every 4 hours, 24 hours a day, 365 days a year

Data and monthly telegrams with consumption values

Walk-by telegrams

Every 128 seconds, 10 hours a day (from 8:00 am to 6:00 pm)

Readout type

Monthly: 4 reading days from the first of each month

Annually: 48 reading days, once a year by due date

Transmission-free days

Monthly: Saturday and Sunday

Annually: Sunday

Current consumption values and 13 statistical values

RF system

Parallel transmission of data telegrams

• AMR
• Walk-by

Increased radio power (10 dBm)

Transmission response

AMR telegrams

Every 7.5 hours, 24 hours a day, 365 days a year

Data telegrams with consumption values

Walk-by telegrams

Every 112 seconds, 10 hours a day (from 8:00 am to 6:00 pm)

365 days a year

Current consumption values and 13 statistical values