Tech Controllers EU-402N PWM, Руководство пользователя, Страница: 19 / 32

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temperature is reached or until the collector temperature drops by the value of the alarm hysteresis (see:
SERVICE MENU > Solar collector> Alarm hysteresis ).
•
Minimum temperature of tank 1 – using this parameter, the user may declare the minimum acceptable
temperature value which the tank can reach. Below this temperature the pump is not activated in collector
defrosting mode.
•
Tank hysteresis – using this function, the user declares the tank hysteresis value. If the tank reaches the pre-set
temperature and the pump is deactivated, it will be activated again after the tank temperature drops below the
pre-set value by the value of this hysteresis.
•
Cooling to pre-set temperature - when the collector reaches the overheat temperature, the pump is activated
in emergency mode to cool it down. In this case, the heat is transferred to the tank until the maximum
temperature is reached. To prevent the accumulation of too hot water in the tank,
Cooling to pre-set temperature
function should be activated. Once activated, when the collector temperature drops below the temperature of
the tank, the pump is activated in order to cool down the tank until it reaches the pre-set temperature.
•
Holiday delta – this function is active only in Holiday mode. This parameter determines how many °C before
reaching the collector overheat temperature the pump is activated in order to cool it down. The pump is
deactivated after the collector temperature drops by at least 5°C .
•
Valve hysteresis - Option available only for schemes: 2, 6, 9, 13, 14.
This function determines the value by which the temperature needs to change in order for the valve to switch
again
.
Scheme 2 and 6: the setting concerns valve control when cooling the collector down in summer mode or alarm
mode, as well as when defrosting. The valve hysteresis determines the difference between tanks temperature at
which the valve switches to the opposite tank
.
Scheme 9: when the pre-set temperature of tank 1 is reached, the valve switches to the heat receiver circulation.
The valve switches again after tank 1 temperature drops by the value of valve hysteresis (this is the difference
between the tanks temperatures
).
Schemes 13 and 14: the regulator controls the switching valve – water from the warmer tank is directed to the
facility. The temperature difference is detected automatically, and if this difference reaches the value of the valve
delta, the valve switches to the warmer tank
.
•
Pre-set temperature of tank 2 - Option available only for schemes 6, 7, 8, 9. This function determines the pre-
set temperature of tank 2 at which the collector pump is deactivated (schemes 6 and 9) or tank 2 pump is
deactivated (schemes 7, 8).
•
Maximum temperature of tank 2 - Option available only for schemes 6,7,8,9. Using this option, the user may
declare the maximum acceptable safe temperature value which tank 2 can reach in case of collector overheating.
•
Tank hysteresis 2 - Option available only for schemes 6, 7, 8, 9. Once the pre-set temperature is reached, the
pump is deactivated. It will be activated again after the tank temperature drops below the pre-set value by the
value of tank 2 hysteresis.
•
Operation algorithm - Option available only for schemes 7, 8,14. Using this option, the user selects the pump
operation mode. The pumps may operate in the following modes:
a) tank 1 priority – tank 1 is heated first (only pump 1 operates). Once the pre-set temperature has been reached,
pump 2 is activated and heats tank 2.