Dometic GROUP NDS SP230 Guía Rápida página 6

4 Target Group
The electrical power supply must be connected by a qualified electrician who has demonstrated
skill and knowledge related to the construction and operation of electrical equipment and instal-
lations, and who is familiar with the applicable regulations of the country in which the equipment
is to be installed and/or used, and has received safety training to identify and avoid the hazards in-
volved.
5 Intended use
The priority switch is intended for distributing power supply in recreational vehicles (RV) with two available volt-
age supplies.
Two outputs are available:
• Electrical appliances that are used only when mains from grid is available.
• Electrical appliances that can be powered by both mains from grid and battery via an inverter.
The priority switch can be used according to the specified protection type after proper installation and cable
routing with suitable cable diameters and external strain relief. The device is not suitable for outdoor use.
This product is only suitable for the intended purpose and application in accordance with these instructions.
This manual provides information that is necessary for proper installation and/or operation of the product. Poor
installation and/or improper operating or maintenance will result in unsatisfactory performance and a possible
failure.
The manufacturer accepts no liability for any injury or damage to the product resulting from:
• Incorrect installation, assembly or connection, including excess voltage
• Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
• Alterations to the product without express permission from the manufacturer
• Use for purposes other than those described in this manual
Dometic reserves the right to change product appearance and product specifications.
6 Technical description
If a mains voltage and voltage generated by the inverter (from a house battery) are both connected to the priority
switch, the use of the mains voltage has priority.
If only voltage generated by the inverter is available, the power supply from the battery is used. This ensures that
the limited power of the battery is only used when necessary. This is true for all electrical devices connected to
the OUTPUT connection of the priority switch.
Electrical devices such as refrigerators and battery chargers can be connected to only receive power output from
the mains voltage, via the OUT connection. When no mains voltage input is available in IN, there is no power
supply for OUT.
It is recommended (but optional) to connect a battery charger to the OUT output to charge the battery when
mains from grid is available.
6
Fig.  on page 4
Fig.  on page 3