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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
Change page
Change page
WRM20 and WRM20+
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 24.4V for 24V systems.
Exit low battery voltage configuration page
It sets exit low battery threshold voltage. With
in the range from 12.4V to 13.8V for 12V systems, and from 24.8V to 27.6V for 24V
systems.
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.
Absorption time
You can set
Absorption time (Tabs): time in hours when the battery can remain at
Veoc voltage before reaching float voltage.
Id WBus configuration
Configures the ID number (ID) of the device on WBus network (only for version WRM20+)
User manual
you change the setting from 10.8V to 12.2V for
Load ON during
night
for
hour.
6
button you will modify the threshold
..
Load ON during night for
1
16 hours.
EN
.
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