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2. Installation instructions
2.1 Unit structure
A
1 cold water connection, SW14 2 Sieve within cold water connectrion
3 Snap closing catch 4 Hot water connection; SW14
5 Cover securing screw 6 Unit rear panel
7 Unit front panel 8 Fixing holes
9 Connection cable 700 mm long 10 Jet regulator SR 3 for MTD 370 and MTD 440
11 Jet regulator SR 5 for MTD 570 12 Identification plate
13 hose connection 3/8“, 500 mm long, 14 T-piece 3/8“
including washers
2.2 Important information
Air in the cold water pipe will destroy the bare-wire heating system of the MTD. If the water supply to
the MTD has been interrupted, for example due to the risk of frost or work on the water pipe, the fol-
lowing steps must be carried out before the system is used again:
1. Disconnect supply or disconnect the fuses.
2. Open a hot water tap downstream of the device for as long as it is necessary for the device and the cold
water pipe to be freed of air.
3. Reconnect the supply or connect the fuses again.
All information in these Instructions for Use and Installation must be followed carefully. They provide impor-
tant information with regard to safety, operation, installation, and maintenance of the device.
2.3 Brief description
The hydraulically controlled, pressurized
Small-Instantaneous Water Heater MTD is designed to supply warm water for one tap only.
The unit is suitable for hand wash basins, for example in guest WC’s, and for under-sink and over-sink instal-
lation.
The bare-wire heating system is suitable for low-lime and limy water (see Table 2 for ranges of use).
2.4 Fittings
Use only pressure tap fittings!
Please use jet regulator
A
(10 or 11) depending on the type of MTD in question).
2.5 Regulations and provisions
Installation (water and electrical installation), as well as the first start-up and maintenance of this unit, may
only be carried out by a qualified installer in accordance with these instructions.
Faultless operation and operational safety are only guaranteed if the original accessories and spare parts in-
tended for the unit are used.
The following should also be observed:
In accordance with IEE and WRC Regulations.
Regulations of the local energy supply company.
Regulations of the relevant water supply company.
The unit rating plate.
Technical data (see Table 1).
The specific electrical resistance of the water must not be lower than specified on the rating plate. In the
case it is used out of the water grid supply network, the lowest electrical resistance of the water is to be
taken into account (see Table 2). Your water supply company will advise you of the specific electrical re-
sistance or the electrical conductivity of the water.
Water installation:
A safety valve is not necessary.
Operating the unit with preheated water only up to max. 25 °C is permitted!
Fittings for pressurised units are not permitted!
Electrical installation:
It must be possible to isolate the unit from the main supply on all poles with an isolating distance of at least
3 mm, for example using fuses.
for the qualified installer
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