Western Co WRM20 Benutzerhandbuch Seite 18

It displays the Energy counter in KWh consumed by the load. It is possible to reset this counter
pressing simultaneously the buttons
Pressing the button, you go back to the main page.
button
System configuration
You enter in configuration pages of WRM20 pressing simultaneously for at least 2 seconds the buttons
....
Change page
Change page
Change page
Change page
Load always ON either
during day or during
night.
Change page
WRM20 and WRM20+
Tab.1 Display pages of measures
Charge program configuration page
It sets the charge voltage for the battery.
SEAL must be set for sealed VRLA or GEL lead acid batteries (*).
FLOOD must be set for flood lead acid batteries (*).
Li must be set for charge lithium-ion batteries. In this case you must also configure the
exact charge voltage so that it is in accordance with charge voltage in the datasheet of the
battery manufacturer. In the WRM20 you can set lithium-ion battery charge voltage in the
range:
14.0V – 14.7V for 12V systems,
28.0V – 29.4V for 24V systems
When lithium-ion program is activated, the charge voltage (Veoc) is not compensated in
accordance with temperature as in SEAL, FLOOD and LEO programs, but the charge
voltage is equal for every temperature measured.
(*) Charge voltage relating to each one of the programs are indicated in the following
Pic.3 and Tab.4 and must be chosen in accordance with the battery manufacturer
indications.
Low Battery voltage configuration page
It sets the intervention voltage of Low Battery protection (load detachment in case of low
battery). When pressing the button
12V systems and from 21.6V to 25.0V for 24V systems.
Exit low battery voltage configuration page
It sets exit low battery threshold voltage. With
from Aut, 12.4V to 13.6V for 12V systems and from Aut, 24.8V to 27.2V for 24V systems.
Aut indicates that low battery output occurs when the battery reaches the end of charge
voltage (Veoc)
Voltage detection day
WRM20 detects the day when the voltage of PV module (Vpan) is > than the Vday
threshold; it detects the night when Vpan is < than Vnight threshold. In this page it is
possible to change Vday threshold. Vnight threshold = Vday – 0.8V
Load management program configuration page
Load ON only
Load ON only
during night.
during day.
User manual
for 2 seconds.
you change the setting from 10.8V to 12.5V for
Load ON during
night for
hour.
6
button you will modify the threshold
..
Load ON during night for
1
16 hours.
EN
.