Tech Controllers EU-28 SIGMA User Manual page 5

fire-up function, the following message appears on the display: "Fire-up failed". In such a
case, the fire-up cycle needs to be restarted.
Operation – After the fire-up cycle is completed, the regulator enters the operation mode. It
is the primary mode of the controller operation in which the fan works automatically, oscillating
around the temperature set by the user. Instead of the fire-up function, the user's menu
presents fan option. The fan may be disabled if needed (e.g. when adding fuel). If the
temperature rises unexpectedly by more than 5
mode is activated.
Damping – if the CH boiler temperature drops 2
rise above this value within 60 minutes (preset damping time), the regulator enters damping
mode. After this time the fan is disabled and the display shows the following message:
"Damping"
In the case of voltage failure, the thermoregulator stops working. After the power supply has
been reestablished, the operation mode is restored according to the previously set parameters
(owing to the built-in memory). The thermoregulator parameters remain stored even on voltage
failure.
II. Functions of the regulator
This section includes the description of the regulator functions, and provides information on
how to adjust the settings and navigate in the menu structure.
II. a) Main page
During standard regulator operation, the LCD display shows the main page with the following
information:
CH boiler temperature (to the left)
Set temperature (to the right)
The set temperature may be easily adjusted using PLUS and
pressing OPTIONS button, the user enters the first level menu. The display shows the first two
lines of the menu. Each menu may be navigated using PLUS and MINUS buttons. Pressing
OPTIONS button moves the user to a further submenu or activates the selected option. EXIT
button moves the user back to the main menu.
II. b) Fire-up
This function enables easy fire-up of the CH boiler. After the fire is initiated by the user, an
automatic fire-up cycle is activated. Next, the CH boiler smoothly enters the operation mode,
owing to optimal parameters. If the CH boiler reaches the temperature of the damping
threshold, the Fan ON/OFF function appears instead of the fire-up function. It enables the user
to switch off the fan at any time (e.g. when adding fuel)
If the CH boiler fails to reach the temperature of 40
30 minutes when in the fire-up mode, the display shows the following alarm message:
o C above the set value, the so-called supervision
o C below the damping threshold and does not
O
23 c |
Ch set
5
O
55 c
O C (preset damping threshold) within
User manual
MINUS buttons. By