WRM20 and WRM20+
User manual
EN
6
System configuration
You enter in configuration pages of WRM20 pressing simultaneously for at least 2 seconds the buttons
.
….
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 (*).
LEO
must be set when batteries are used
for po er suppl i erters series’ Leo ardo fro
Western CO.
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 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.
Change page
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
you change the setting from 10.8V to 12.2V for
12V systems and from 21.6V to 24.4V for 24V systems.
Change page
Exit low battery voltage configuration page
It sets exit low battery threshold voltage. With
button you will modify the threshold
in the range from 12.4V to 13.8V for 12V systems, and from 24.8V to 27.6V for 24V
systems.
Change page
Voltage detection day
WRM20 detects the day when the voltage of PV module (V
PAN
) is > than the V
DAY
threshold; it detects the night when V
PAN
is < than V
NIGHT
threshold. In this page it is
possible to change V
DAY
threshold. V
NIGHT
threshold = V
DAY
–
0.8V
Change page
Load management program configuration page
..
Load always ON either
during day or during
night.
Load
ON
only
during day.
Load ON only
during night.
Load ON during
night
for
1
hour.
Load ON during night for
16 hours.
Change page
Absorption time
You can set
Absorption time in hours. When battery voltage is in Vch livel for
Absorption time, the WRM20 start float state, where battery voltage is set to VFlt.
Change page
