Pump Settings; Additional Contact; Additional Contact 2 - Tech Controllers EU-i-3 User Manual

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Hysteresis of tank 2 – if tank 2 reaches the pre-set temperature and the pump is disabled, it will be enabled
again when the temperature of tank 2 drops below the pre-set value by this hysteresis.
•
Sensor of tank 2 – this option enables the user to select the sensor which will provide the main controller with
temperature readings. Additional sensor 2 is the default setting.
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Valve hysteresis – this setting concerns the control of a switching valve while cooling down the collector in
summer mode or alarm mode or during defrosting. The valve hysteresis is the difference between the tanks'
temperatures at which the valve switches to the other tank.
3.

PUMP SETTINGS

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Solar pump deactivation delta – This function determines the difference between the collector temperature and
the tank temperature at which the pump is deactivated in order not to cool down the tank.
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Solar pump activation delta – This function determines the difference between the collector temperature and
the tank temperature at which the pump is activated.
4.

ADDITIONAL CONTACT

This option is used to select the additional contact which will handle the solar collector pump. The user may only choose
these contacts which have not been assigned other algorithm.
5.

ADDITIONAL CONTACT 2

This option is used to select the additional contact for the valve switching between the two accumulation tanks. The
collector circuit graphic on the installation screen will change to illustrate 2 accumulation tanks and a switching valve.
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