Bedienungsanleitung ATTACK Electric Easy (Seite 8 von 28) (Englisch)

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1.7.5 Safety function of the boiler

1.7 Description of function

Control unit

1.7.1 Technical description †The control unit is designed according to valid EU

The boiler is designed according to valid norms and rules norms and is certified.

ČSN EN and IEC. The safety of the boiler, energy saving †The control unit has a protection against below and

and sound was important matter during the boiler over voltage

designing. †The control unit is protected by system Watch Dog-

Timer with time 512 ms against its processor

1.7.2 Principle of boiler operation “blocking”. In case that the processor is blocking the

IThe insulated boiler body with volume is a reservoir automatic reset function is activated and then the

where water is heated by electric heating elements. In program is going with all parameters set from the point

dependency of heat request there are connected 1 = 2, 5 where it was broken.

kW, 2 = 5 kW or 3 = 7, 5 kW heating elements.

Circulation of water is through the pump. Safety of boiler Protection against overheating

operation is monitoring by several independent sensors. †The boiler has a emergency thermostat set for 100° C.

Whole heating process and pump operation is controlled In case of boiler overheating heating elements are put

by the control unit with display and push touch buttons. out of operation independently to the control unit. This

The button 0/1 is for switching off the boiler out of breakdown is signalling on the display as E2. This

operation . breakdown could be repaired only by authorized

service man.

1.7.3 Control unit and control boardControl

Protection against lost of heating water

unit has several functions which assure basic

pressure

characteristics, mainly:

†The boiler is equipped with a pressure switcher which

† safety functions assure protection against the

detriment of health and property control minimal pressure in heating system 0,4 bar,

† user´s functions functions set by user when the function reliability of deaerate valves is

† operation functions internal functions of control unit assured, it means that the boiler has sufficient volume

import for sound operation of the boiler, but un-get-at- of water.

able for user †In case of lost of heating water pressure below 0,4 bar

Control unit works with below mentioned inlet signals: the boiler signs the breakdown E3 and heating

† temperature of heating water (sensor NTC) elements are put out of operation independently to the

† minimal operation pressure (switcher 230 V) control unit.

† maximal operation pressure (switcher 230 V) †This breakdown could be repaired after the control of

† room thermostat (switcher 24 V) tightness of water ways and after water filling over 0,4

† request service utility water (switcher 230 V). bar. After that the boiler is automatically reset and

Control unit controls: returned to normal operation.

† 3 heating elements

† pump operation Boiler protection against over and below voltage

†in supply electrical net

1.7.4 Protection function of boiler †The control unit is equipped with function assuring

putting the boiler out of operation if the voltage is

Antifreeze protection of the boiler below 150 V or over 250 V. This stage is marked on the

†This function protects the boiler against freeze and is display with the blinking point in the low right corner of

active in the mode STAND-BY. the display.

†Circulation pump and the boiler are in operation, if †When the voltage is OK = in the scale 150 250 V then

temperature of heating water decreases below 5° C. In the boiler returns to normal operation.

this case the boiler assures minimal level of heating

and the system is mildly warm, the boiler heats to 15° Boiler protection against overpressure of

C temperature of heating water and after that the heating water

boiler set back to mode that it start to operate from. †The boiler pump is equipped with pressure safety valve

†If the boiler is switch off or out of electric supply, this set for 3 bars. In case of the overpressure more than 3

function is not active. bars the leakage of water occurs from the valve till the

pressure of water in heating system is not below

Unlocking protection of heating system maximal requested level.

†It is active at all times if the circulation pump or 3-ways †This valve is in its operation automatically.

valve is more than 24 hours out off operation to protect

blocking of the pump or the valve due to its small parts.

This function avoids blocking of the pump rotor in

mode STAND-BY and elongates its lifetime.

†The pump works 1 per day for 10 s.

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