Intended Use; Technical Description; Installation - Dometic BUTTNER MT NU 2300 Installation And Operating Manual

All other actions are intended also for non-profes-
sional users.

Intended use

The mains priority switch is intended for distribut-
ing power supply in recreational vehicles (RV) with
two available voltage supplies.
The mains priority switch can be used according to
the specified protection type after proper installa-
tion and cable routing with suitable cable diame-
ters and external strain relief. The device is not
suitable for outdoor use.
This product is only suitable for the intended pur-
pose 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 operat-
ing or maintenance will result in unsatisfactory per-
formance and a possible failure.
The manufacturer accepts no liability for any injury
or damage to the product resulting from:
• Incorrect 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 per-
mission from the manufacturer
• Use for purposes other than those described in
this manual
Dometic reserves the right to change product
appearance and product specifications.

Technical description

If a mains voltage and voltage generated by the
inverter (RV house battery) are both connected to
the device, the use of the mains voltage has priority
(fig. 1, page 3). If only voltage generated by the
inverter is available, the power supply from the bat-
tery is used (fig. 2, page 3). This ensures that the
limited power of the battery is only used when nec-
essary.
A
NOTICE!
Max. load is 2300 VA and 10 A.

Installation

Choosing a location
Install the device in a clean area inside the RV
where it is protected against vibrations, explosive
materials, moisture, heat, and pollution.
Installation procedure
!
WARNING! Electrocution hazard
The installation may only be carried out
by a qualified electrician.
!
WARNING! Electrocution hazard
Before any work on the 230 VAC wiring is
performed, switch off all dangerous volt-
age. Ensure that no accidental switching
on or plugging in of mains voltage is pos-
sible.
!
WARNING! Electrocution hazard
Never put cables for 12 VDC voltage and
230 VAC voltage in the same cable duct.
➤Connect the cables according to the wiring dia-
gram (fig. 3, page 4).
Connect the cables through the existing rubber
sleeves, protected outside against tensile loads
and vibration. The diameters of the cables must
correspond to the diameter of the rubber
sleeves in order to comply with the IP rating.
Wiring diagram
AC1-IN
AC2-IN
AC-OUT
N
PE
L
4445103625
Description
External mains input
Eingang Wechselrichter
230 V cabin sockets output
Neutral conductor
Protective earth conductor
Line conductor
7