AEG MTH 350 - Installation Instructions - Procedures and Connection; Unit Installation and Electrical Connection

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For the qualified installer
Areas of application for instantaneous water heaters relative to the specific electrical
conductivity / specific electrical resistance of the water
Designation as Areas of application for different water analysis
reference temperatures* designation
Standard at at
at 15 °C 20 °C 25 °C
Specific electrical resistance ≥ 1100,9 Ωcm ≥ 1970 Ωcm ≥ 1900 Ωcm
corresponding to
specific electrical conductivity ≤ 1190.9 mS/m ≤ 1103 mS/m ≤ 1111 mS/m
≤ 1909,9 µS/cm ≤ 1030 µS/cm ≤ 1110 µS/cm
Table 2
* The values for the specific electrical resistance and the specific electrical conductivity are determined
at different temperatures in different regions. This must be taken into account in the evaluation.
2.8 Installation location
The MTH is to be installed, according to choice, as an over-sink or under-sink unit ,
in a closed, frost-free room in the vicinity of the water tap (dismantled unit is to be stored
in a frost-free place, as residual water always remains in the unit).
2.9 Unit installation
Under-sink installation with AHu 40 MTH or AHEu 40 MTH fitting 
n Loosen cover securing screws by two turns.
o Using a screwdriver, release the snap closing catch.
p Take off the unit front cover with heating block.
q With the help of a pair of nippers, break out the feed-through opening for the connection cable
(break-off point).
r Fix the unit rear panel to the wall using dowels and screws; use the unit rear panel as a drilling
template.
Installation, last in – first out.
Screw connecting hoses of the AHu 40 MTH or AHEu 40 MTH unit onto the water connections (1 and 2)
(see fittings description), when doing this use a 14 mm spanner on the unit as a counter-force.
Over-sink installation with AHo 40 MTH fitting
The cold water pipe and AHo 40 MTH wall fitting must be safely secured.
1. Screw the AHo 40 MTH wall fitting into the wall disc.
2. Screw the MTH unit onto the fitting; when doing this use a 14 mm spanner on the unit as a
counter-force.
Over-sink installation without wall fitting
Installation of the unit as shown in illustration  (Gerät um 180 ° gedreht).
2.10 Electrical connection 
The unit must be connected to the protective earth terminal.
• This appliance is fitted with a power supply cabel.
English
MTH 350 DE_GB.p65 14.04.2004, 10:4515