Room Temperature Calibration (ACA) – Parameter 12
This parameter defines the offset value for room air temperature. If the internal air temperature sensor is not
correctly calibrated changes of temperature can be made by adjusting the values by up to +/- 9.5°C or +/-
19°F. This value will be added or subtracted from the internal air temperature sensor reading.
Default value is 0.
HYSTERESIS (HYS) – Parameter 13
This parameter defines the hysteresis value for temperature control. The thermostat will stabilize the
temperature with selected hysteresis. For example, if the SET POINT is set for 25°C and HYSTERESIS is set for
0.5°C then the thermostat will change the state to HEATING if the temperature will be lower than 24.5°C and
it will change the state to idle if temperature reaches 25.5°C.
You can change the hysteresis from 0.5°C up to a maximum of 9.5°C in Celsius mode and from 1°F to 19°F in
Fahrenheit mode.
Default values are 0.5°C or 1°F.
DISPLAY BRIGHTNESS
The thermostat has two states of brightness.
Active state – when you press any key and commence adjustments.
Inactive state – after five seconds of inactivity it will revert to inactive state.
The display brightness in either state can be adjusted.
Parameter 14 (brH) – Display brightness high level
You can select the brightness level in the active state from values 1 to 4.
Default value is 3.
Parameter 15 (brL) – Display brightness low level
This parameter defines the brightness level of the display in the inactive state. You can select the level from
values 1 to 4 but the level cannot be higher than the level of brightness for the active state.
Default value is 2.
Parameter 16 (nEt) – INCLUSION / EXCLUSION MODE
If the thermostat is included in the z-wave network the antenna will indicated in the main display and Inc will
be indicated in the Param 16 value. If the thermostat is not included in the network, no antenna will be
indicated in the main display and the Param 16 value will be ECL.
To include or exclude the thermostat into/from your home automation gateway, activate inclusion or
exclusion mode on your gateway then press “+” key on the thermostat for inclusion and the “-” key for
exclusion.
For more details go to point “Z-Wave Functions” – “Network “of this manual on page 9.
Parameter 17 (Prr) – Power Meter Reset
The Heltun thermostat monitors the load and power consumption. The data of total consumption in kWh is
indicated in the Param 17 value. If the device is included in the Z-Wave network it will also send the data of
the current load and total consumption to the main controller.
The thermostat, even when the electricity is disconnected, maintains the electric consumption record in its
memory. To reset the consumption memory press and hold “+” key until the parameter value will be changed
to 0 (about 3 seconds).
CHILD LOCK – LOC
To activate the child lock mode, press and hold the “HEATING” key for 5 seconds. The LOC text will appear in
the bottom left hand corner. To deactivate the child lock press the FLOOR key for 5 seconds and the “UnL” will
appear in the display.
