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ウォーターヒーター Drazice OKH 100 NTRのPDF 操作および設置マニュアルをオンラインで閲覧またはダウンロードできます。Drazice OKH 100 NTR 12 ページ。 Tank type indirect water heaters
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a safety valve must be identical to the maximum allowed heater pressure, and at least 20% higher than the maximum

pressure in the water main. If the water main pressure exceeds such value, a reduction valve must be added to the

system. No stop valves can be put between the heater and the safety valve. During the assembly, follow the guide

provided by the safety equipment manufacturer. It is necessary to check the safety valve each time before putting it into

operation. It is checked by manual moving of the membrane from the seat, turning the make-and-break device button

always in the direction of the arrow. After being turned, the button must click back into a notch.

Proper function of the make-and-break device results in water draining through the safety valve outlet pipe. In common

operation, such a check needs to be implemented at least once a month, and after each heater shutdown for more than 5

days. Water may be dripping off the drain pipe of the safety valve; the pipe must be open into the air, pointed down;

environment temperatures must not drop below zero.

When draining the heater, use a recommended drain valve. First, close water input into the heater.

Find necessary pressure values in the following table.

For proper safety valve operation, a backflow valve must be mounted on the inlet pipes, preventing spontaneous heater

draining and hot water penetrating back into the water main.

We recommend that the hot water

distribution from the heater was as short as

possible to minimise heat losses.

Heaters must be provided with a discharge valve mounted on the cold service water inlet to the heater (Fig. 2) for

potential disassembly or repair.

When assembling the security equipment, follow ČSN 06 0830.

CONNECTION OF INDIRECT HEATER TO HOT WATER HEATING SYSTEM

(examples of connection + Fig. 1)

It is recommended to install stop valves on the heating water inlet and outlet (for possible dismantling of the heater).

The valves have to be as close to the heater as possible to avoid higher thermal losses.

The heating circuit is connected to marked inputs and outputs of the heater exchanger; the deaerating valve is

mounted in the highest place. It is necessary to install a filter into the circuit in order to protect the pumps, the three-

way valve, and backflow flaps, and the exchanger from sedimentation. It is recommended to flush the heating circuit

before the assembly. All wiring connections must be properly insulated from heat. If the system works with priority

heating of hot service water using a three-way valve, always follow the installation instructions of the three-way valve's

manufacturer.

Safety valve starting

pressure (MPa)

0.6

0.7

Admissible operating

water heater pressure

(MPa)

0.6

0.7

Max. pressure in the cold

water pipe (MPa)

up to 0.48

up to 0.56

up to 0.8