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ウォーターヒーター Drazice OKHE 125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 OKHE 125 9 ページ。 Tank-type water heaters for vertical mounting
Drazice OKHE 125 にも：操作および設置マニュアル (19 ページ)

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The room in which the appliance will be operated, must be frost-free. The appliance has to be mounted at a

convenient place, it means that the appliance must be easily available for potential necessary maintenance, repair or

replacement, as the case may be. If water is strongly calcareous we recommend that any of the common decalcifying

devices was installed with the appliance, or the thermostat to be set to minimum operation temperature of 60

(setting to position "60"). For proper operation, drinkable water of adequate quality shall be used.

To avoid potential sediments we recommend that the device was installed together with a water filter.

Wall mounting

Prior to the mounting check the bearing capacity of the wall and the material it is made of, considering the weight of

the heater filled with water. Depending on the wall material choose adequate fixtures.

Should you have any doubts regarding the wall bearing capacity, consult the suspension with a building specialist.

The minimum diameter of the bolts for suspending the heater is 12 mm. When mounting the anchor bolts follow the

guide provided by the anchor bolts' manufacturer.

Mount the anchors by the dimensional drawing in 350 mm spacing, and screw firmly a steel hinge onto the wall.

Check its proper vertical positioning.

Recheck the torque of the suspension bolts on the heater and suspend the heater.

If needed, the suspension bolts can be shifted by 50 mm in vertical direction.

Using the detent support in the bottom part of the heater make sure it runs in parallel with the wall!

If the hot water heater is mounted in a tight, small space, or in an intermediate ceiling, etc., you have to make sure

that the connecting side of the appliance (connections to water supply, area for electric plugging) remained accessible

and no heat accumulation occurs. Free space of up to 500 mm from the bottom edge of the heater has to be available

under the heater. When mounted directly under the ceiling, the distance from the ceiling has to be 50 mm at least.

5.1

Connection to power water

Power water connects to pipes with ¾" thread in the bottom part of the heater.

Blue - cold water supply, red – hot water outlet. For potential disconnection of the heater, the service water inlets and

outlets must be provided with screw coupling Js 3/4". Safety valve is mounted on the cold water inlet identified with a

blue ring.

Each hot service water pressure heater must have a membrane spring loaded with a safety valve. Nominal clearance of

safety valves is defined in the ČSN 0 60830 standard. The heaters are not equipped with a safety valve. The safety

valve must be easily accessible, as close to the heater as possible. The input pipes must have at least the same

clearance as the safety valve. The safety valve is placed high enough to secure dripping water drain by gravity. We

recommend mounting the safety valve onto a branch pipe. This allows easier exchange without having to drain the

water from the heater. Safety valves with fixed pressure settings from the manufacturer are used for the assembly.

Starting pressure of 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 manually moving of the membrane from the seat, turning the make-

and-break device button always to the right. 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.

Safety valve

Admissible operating

starting pressure

(MPa)

pressure (MPa)

0.6

0.7

Max. pressure in

water heater

the cold water pipe

0.6

0.7

(MPa)

do 0.48

do 0.56

do 0.8