Tech
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3
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II.
Use
EU-401N temperature regulator is intended for controlling solar collector systems in various
configurations. The device controls the collector pumps (or both the pump and the valve) on the basis
of solar batteries temperature and the accumulation tank temperature (two tanks). Optionally, it is
possible to connect an additional device: circulating pump, electric heater or to send a signal to CH
boiler in order to initialise the fire-up process.
Controlling the circulating pump and sending a fire-up signal to the CH boiler may be done
directly from the controller. An additional signal relay is necessary in order to control the heater.
The controller offers PWM pump control option enabling the user to adjust its rotational speed.
III.
Principle of operation
Example control panel
Use buttons to navigate through the menu. Press MENU to enter the menu or confirm the
settings. Use PLUS and MINUS buttons to switch between menu options. Press MENU to confirm your
choice. In order to return to the main screen view (or higher level menu), press EXIT button. Follow
the procedure to adjust the settings.
Switching valve
Clock
Collector
temperature
Operation mode
Additional device
active
MENU
PLUS button
MINUS button
EXIT
Heat tank
temperature
Collector pump
Collector
temperature
