Manual Austria Email KDO 302 (page 20 of 72) (English, German, Dutch, French, Italian, Spanish)

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20 Id.Nr. 235161-13

6. CENTRAL HEATING CONNECTION

The pipe register resp. the double shell must be rinsed prior to commissioning in order to remove any possible contamina-

tions (e.g. scale) from the heating circuit. The heating water must be treated in accordance with the national regulations and

standards (e.g. ÖNORM H5195-1) during commissioning and comply with the regulations.

Water heater with register

The bare-tube heat exchangers installed in the storage tank can be connected to a water heater if the pressure and tempe-

rature correspond to the data stated on the specication label. Forced circulation using a pump is required.

When installing a water heater with register a shut-o member must be installed in the ow line to prevent back-heating into

the heating circuit when the central heating and heat pumps are turned o or for electrical operation.

The outgoing and return ow must, however, never be shut o, since otherwise the water in the register cannot expand and

three is a risk of damaging the water heater. The bare-tube heat exchanger must be properly rinsed before performing the

initial installation (we also recommend installing a dirt lter). If the heat exchanger is not connected, the connections must

be sealed tightly to prevent condensation water.

Double-jacketed water heater

The double-jacketed water heater may be connected only to water heaters with max. 110°C outow temperature and 3 bar

pressure. When using a feed pump this can be controlled using the feed pump regulator (see Section 9). When installing

a water heater with double jacket, a shut-o valve or circulation brake must be installed to prevent back-heating into the

heating circuit. The outgoing and return ow must never be shut o, since water contained in the double jacket cannot

expand and there is a risk of damaging the boiler. Observe the following lling requirement: When placing in service, rst the

interior boiler and then the central heating system (ll double jacket). When draining, rsts empty the double jacket and then

the interior boiler. During operation you must ensure that the pressure in the interior boiler does not drop below the pressure

in the heating circuit (double jacket). If this requirement is not observed, there is a danger that the interior boiler can become

damaged due to excessive relative pressure in the double jacket. The guarantee, warranty and liability of the manufacturer is

void is such cases.

7. IMPORTANT INSTALLATION NOTES

When installing the appliance, follow the dimensional drawings and any included caution labels.

NOTE: Be sure to take into account the weight of the water heater lled (with the rated capacity) when selecting a

mounting location so as not to overload the bearing area.

For acceptable distance from combustion devices, refer to the manufacturer’s documentation as well as the prevailing codes.

If a water heater is tted with additional cladding, or is located in small, narrow areas or between walls, be sure that all

connections (water ttings, electrical connection space and any installed heater) remain freely accessible and that no heat

can accumulate. A clear area of 500mm must be provided for a heating ange.

When selecting and arranging the materials used for installing the appliance, use caution and consider possible electro-

chemical reactions (mixed installation!). The pipelines must be potential-compensated according to DIN 50927.

This type of corrosion results in formation of corrosion elements. In corrosion elements there is a voltage present between the

anode and cathode area. The resulting processes are mutually dependent, but can take place at various distances from each

other. Corrosion elements may occur due to diering potentials, as is the case with contact corrosion. This means various

metals come into electrical contact with each other through an ion-conducting medium (water).

If especially aggressive water is present which requires installation-side special solutions, the possible necessity of special

versions of the water heater should also be considered (ask one of our representatives or contact us directly).

Non-observance of this specication may be considered improper use and result in voiding of the warranty.

This device is not designed to be used by persons (including children) with physical, sensory or mental disabilities or lacking

experience and/or lacking knowledge, unless these are supervised by a person who is responsible for their safety or have

received instructions on how to use this device from any such person. Children should be supervised in order to ensure that

they do not play with this device.

The operator of the system must ensure that there is no hazard to persons from spraying with hot water, especially when

non-trained persons use the appliance.

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Austria Email KDO 302 Manual

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