for the user and the qualiﬁed installer
The appliance should be installed according to choice as an over-sink or under-sink unit' in a closed, frost
free room in the vincinity of a water draw off point
Dismantled unit is to be stored in a frost-free place, as residual water always remains in the unit.
MTH als Untertisch-Montage:
Loosen cover securing screws by two turns.
Using a screwdriver, release the snap closing catch.
Take off the unit front cover with heating block.
With the help of a pair of nippers, break out the feed-through opening for the connection cable.
Fix the unit rear panel to the wall using dowels and screws; use the unit rear panel as a drilling template.
Hook on the unit front panel with heating block.
Engage the heating block in the snap closing catch.
Secure the unit front cover with screws (Use enclosed sticker with company logo to replace existing one).
Screw connecting hoses of the AHo 40 MTH or AHEu 40 MTH unit onto the water connections
see ﬁttings description), when doing this use a 14 mm spanner on the unit as a counter-force.
MTH with wall ﬁtting AHo 40 MTH:
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.
MTH for over sink installation without wall ﬁtting:
Installation of the unit as shown in illustration 1 to 8 (unit rotated by 180 degree).
The unit must be connected to the protective earth terminal.
This appliance is ﬁtted with a power supply cable.
For over sink installation with wall ﬁtting AHo 40 MTH please put the power supply cable behind the appli-
Handover of the unit
Explain the function of the unit to the user and familiarize him or her with its use.
Draw the user's attention to possible hazards (scalding).
Hand over these instructions for careful retention.
(may only be carried out by a qualified installer)
Fill and deaerate the unit.
Note: danger of running dry!
Open and close the tap repeatedly until the pipework and the
unit are free of air. For guidance on air, see „2.3 Important
Switch on the mains power.
Test the operating mode of the instantaneous water heater
The enclosed sticker has to be stucked after unit
(1 and 4,