Manual Austria Email KDO 302 (page 17 of 72) (English, German, Dutch, French, Italian, Spanish)

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1. OPERATING REQUIREMENTS AND IMPORTANT NOTES

This device is only suitable for hot water preparation within closed spaces, and may only be installed by licensed professionals

(with due consideration to the relevant professional standards e.g. ÖNORM B2531, ÖNORM EN 806).

The tank can only be used in accordance with the conditions indicated on the rating plate if the medium used complies with

the European Drinking Water Ordinance. Furthermore, a minimum conductivity

of ≥ 150 μS/cm must be available in order to ensure adequate corrosion protection.

In addition to the legally recognised guidelines and standards (Austria: ÖVE, ÖNORM etc.), the connection conditions of the

local electricity and water works, as well as those set out in the installation and operating instructions, must be complied with.

Hot water preparation must be done in compliance with the applicable standards (e.g. ÖNORM H 5195). The heating water

must have a pH value between 8 and 9.5.

The area in which the appliance will be used must be kept above freezing. It must be installed in a location which allows for

access in case of any necessary maintenance, repair or replacement. The costs for any necessary changes to the structural

conditions (e.g. doors and passages too narrow) are not governed by the guarantee and warranty declaration and therefore

shall be rejected on the side of manufacturer. This means that any construction which hinders work on the appliance must be

removed by the customer. When erecting, installing and operating the water heater in unusual locations (e.g., attics, interior

rooms with water-sensitive oors, closets, etc.), provision must be made for possible water leakage and means provided for

catching the water with a corresponding drain to avoid secondary damage. The appliance may be installed and operated

only in the intended conguration and on a horizontal surface which is appropriate for the weight of the tank when it is full

of water. When water with high lime content is used, we recommend installing a commercially available water softener and

operating at a maximum temperature of approx. 65°.

For proper operation of the hot water storage, a drinking water quality according to the national regulations and laws

(drinking water ordinance) is necessary.

All stated limit values for various substances (e.g. nitrate <50 mg/l, nitrite <0.1mg/l, chloride <200 mg/l, iron <0.2mg/l,

sulphate <250 mg/l, pH value ≥ 6.5 and ≤ 9.5, conductivity at least 150 μS/cm) must be observed. The water may only be

decalcied to a maximum of 8° dH.

The connection threads for cold water, hot water and circulation are designed „at-sealing“ as G threads according to ÖNORM

ISO 228. For other sealing aids, e.g. hemp or Teon tape, care must be taken to ensure that the corrosion protection layer

(enamel) is not damaged by excessive sealing in the interior of the connection pipe. Furthermore, the galvanic series of

voltages must be taken into account in order to avoid contact corrosion between the tank connection and the connecting

piece.

In order to protect the sealing surfaces of the connection threads from corrosion, they are wetted with oxidation enamel or

a lacquer protection layer. For this reason, in the case of a at-sealing connection of the hot water tank, the end face of the

connecting thread must be cleaned by means of a wire brush or abrasive paper before installation in order to obtain a clean,

adequate sealing surface.

Important: All metallic components such as SH, RWT, and/or EBH are to be inserted electrically insulated from the memory.

To protect the built-in parts from corrosion, a transition resistance of about 600 Ω is to be provided (if not yet installed in the

built-in parts at the factory).

2. SERVICE WATER CONNECTION PRESSURETIGHT

All hot water heaters which have the designation nominal pressure greater than 0 bar (atmospheric pressure) on their

rating plate are pressure-resistant accumulators and can be loaded with the maximum operating pressure indicated on

the rating plate. If the line pressure is higher, a pressure reducing valve provided by the user must be installed in the cold

water supply line.

If inappropriate or non-functioning ttings are used, or if the specied operating pressure is exceeded, all guarantees,

warranties and product liability for our water heaters are void. Therefore only pressure-rated ttings may be used. Component-

inspected safety devices are to be provided in the cold water supply line according to the connection diagram shown below.

A prototype-inspected safety group to DIN 1988 or ÖNORM B2531 for closed water heaters must be installed in the cold

water line.

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Austria Email KDO 302 Manual

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