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ATTACK Electric Excellent Manual

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signal of relay lightening in the second level
potentional free switcher
HDO (mass remote control) signal potentional free
switcher
signal HDO (mass remote control) activation of
“working zero” N
breakdown signal of floor overheating potentional
free switcher
breakdown signal of overheating 230 V
breakdown signal of pressure loss 230 V
signal of GSM mode
Control unit controls:
mode relay heating elements
mode relay pump
mode TUV (sanitary water) three ways valve for TUV
1.7.4 Antifreeze protection of the boiler
Antifreeze protection of the boiler
This function protects the boiler against freeze and is
active in the mode STAND-BY.
Circulation pump and the boiler are in operation, if
temperature of heating water decreases below 5 °C. In
this case the boiler assures minimal level o heating and
the system is mildly warm, the boiler heats to 15 °C
temperature of heating water and after that the boiler
set back to mode that it start to operate from. Pump
running of is active.
In case that the boiler is in the summer mode
(permanent heating of storage water tank) and the
temperature of heating water decreases below 5 °C
then the antifreeze protection function is activated for
heating system, after the boiler catch the temperature
15 °C, then the 3-ways valve go back to the position for
heating of sanitary water and pump running of is also
active.
If the boiler is switched off or out of electric
supply, this function is not active.
Unlocking protection of heating system
It is active at all times if the circulation pump or
3-ways 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 time per day for 10 s.
1.7.5 Safety function of the boiler
Control unit
The control unit is designed according to valid EU norms
and is certified.
The control unit has a protection against below and
over voltage
The control unit is protected by system Watch-Dog-
Timer with time 512 ms against its processor “blocking”.
In case that the processor is blocking the automatic
reset function is activated and then the program is
going with all parameters set from the point where it
was broken
Protection against overheating
The boiler has an emergency thermostat set for 100 °C.
In case of boiler overheating heating elements are put
out of operation independently to the control unit. This
breakdown is signaling on the display as a critical
breakdown No. 5.
This breakdown could be repaired only by authorized
service man.
Protection against lost of heating water pressure
The boiler equipped with a pressure switcher which
control minimal pressure in heating system 0,4 bar,
when the function reliability of deaerate valves is
assured, it means that the boiler has sufficient volume
of water.
In case of lost of heating water pressure below 0,4 bar
the boiler signs the critical breakdown No. 4 and
heating elements are put out of operation
independently to the control unit.
This breakdown could be repaired after the control of
tightness of water ways and after water filling over 0,4
bar. After that the boiler is automatically reset and
returned to normal operation.
Boiler protection against over and below voltage
in supply electrical net
The control unit is equipped with function assuring
putting the boiler out of operation if the voltage is below
150 V or over 250 V. This stage is marked on the display
like a critical breakdown No. 8. Below voltage is not
marked on the display.
When the voltage is OK = in the scale 150 250 V, the
boiler returns to normal operation.
Boiler protection against overpressure of heating
water
The boiler pump is equipped with pressure safety valve
set for 3 bars. In case of the overpressure more than 3
bars the leakage of water occurs from the valve till the
pressure of water in heating system is not below
maximal requested level.
This valve is in its operation automatically.
… 10 …


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