Western Co WRM30+ Manuel De L'utilisateur page 22

WRM30+ has got an automatic detection of battery voltage which is executed at power on; consequently it sets the
proper charging parameters as described in Tab. 1.
If the battery voltage is not included in one of the slot in tab. 1, WRM30+ will report the error E03 (see§
); charging and load will be deactivated. If this error appears check for proper voltage of the battery bank,
of the system
then re-execute the start-up.
1
The jumper is made with a conductor having a section of at least 2.5 mmq.
2
Never exceed the PchMax for each channel.
The load has got the positive terminal in common with the positive of battery, while the "minus" is switched through the internal switch (never connect the minus
3
of the load with the minus of the battery!)
Choice of PV module
Thanks to its MPPT charging circuit, WRM30+ charge controller, allows the use of a wide range of PV modules ensuring
the optimal exploitation of the whole power. The PV module must be selected according to the nominal battery voltage
and respecting the constraints of the panel input of WRM30. The below reported tab. 2 gives an indication of the
recommended ranges that are accepted in input on each PV channel of the charge controller.
Nominal battery voltage
1 Values refer to mono or poly crystalline silicon PV modules.
Installation
1) Install WRM30+ in a dry and adequately ventilated place, dust-free and properly ventilated fixed on a non-flammable
surface and positioned so as to leave an unobstructed space of at least 10cm in the neighbourhood of the device so
to allow the cooling for natural air convection or forced by the internal fan.
2) Remove the front cover to access to electrical connections (see pic.4).
3) Connect in the following order: load, sensor for measure of battery temperature and voltage (included), PV module,
and finally the battery as in the diagram fig. 2. At battery connection, the charge controller turns on and starts to
work. The cable sections must be chosen so that in each length of cable the maximum permissible voltage drop is less
than 3% of the system nominal voltage (Tab. 3)
4) You can connect to WRM30+ lead batteries with 12V, 24V or 48V nominal voltage. At power on the charge controller
measures the battery voltage, it recognizes the nominal voltage of the battery bank connected to it and it
automatically sets the correct levels of charging voltage (see §
the type of battery being used to adjust the correct charging voltage (V
either VRLA sealed or GEL batteries, while set FLOOD configuration if you use flooded lead acid batteries Or Li for
Lithium (see §
System configuration
Battery voltage measured at startup
10,0V < V < 16,0V
batt
20,0V < V < 32,0V
batt
40,0V < V < 64,0V
batt
Tab. 1 Recognition thresholds of battery nominal voltage
12V
24V
48V
Tab. 2 Selection of PV strings
).
WRM30+
User manual
Detected nominal voltage
Features of PV strings @25°C (per channel)
V : voltage at maximum power
mp
V : open circuit voltage
OC
P : max power
MAX
N : number of cells in series
cs
V : voltage at maximum power
mp
V : open circuit voltage
OC
P : max power
MAX
N : number of cells in series
cs
V : voltage at maximum power
mp
V : open circuit voltage
OC
P : max power
MAX
N : number of cells in series
cs
General description
4
Battery at 12V
Battery at 24V
Battery at 48V
1
1
1
). The user must, however, configure
). Please set SEAL configuration if you use
EoC
EN
Alarms and errors
Range
≤30V
15V≤V
mp
< 40V
< 225W
≤60
36≤ N
cs
≤60V
30V≤V
mp
< 80V
< 450W
≤112
72≤ N
cs
≤140V
60V≤V
mp
< 180V
< 900W
≤240
144≤ N
cs