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b)
The actuator is being closed as light indication 10(<) appears – figure 3a .
The control of the actuator operation is being undertaken by the Controller when the
current menu is being escaped.
In the very beginning the servo-actuator has to be separated of the mixed valve. The
test of the correct direction run of the servo-actuator and the accurate operation of the end
circuit closers have to be done by switching positions “A” and “B”. In case the servo-actuator
moves in the opposite direction than the expected one, the cables of terminals (-S) and (+S)
from X10 are to be replaced.
After fixing the correct run direction of the servo-actuator it is necessary the servo-
actuator to be waited for to make it complete move until the end position (reaching the end
circuit closer for a “closed”). The regulation element of the mixed valve is to be turned
manually to a closed position, as this is the position for the servo-actuator mounting to the
mixed valve.
3.1.3 Fixing the assigned minimal temperature level of the return boiler water
The minimal temperature level of the boiler return water is to be fixed by submenu
„SETTINGS” -> „Set return Tr
”
(see point 1.4). The assigned temperature of the return boiler
water can be adjusted within the range of (+45
0
C) – (+65
0
C). When the real boiler return
water temperature decreases bellow the assigned level, indication 6 appears and the servo-
actuator starts closing the boiler water flow to the heating circuit.
The recommended levels of the fixed return boiler water temperature are as follows:
Boilers with steel heat-exchangers
from 55 up to 60
Boilers with die-cast heat-exchangers
from 45 up to 55
Solid fuel gasification boilers
from 60 up to 65
3.1.4. Fixing the heating water temperature
The assigned heating water temperature is being kept by the Controller only in winter
mode, but if the room thermostat is switched of for less than 12(24, 36 or 48) hours, or a room
thermostat is not installed. During that time the Controller keeps the heating water
temperature, assigned by transmitter of the outdoor temperature by means of outdoor
temperature sensor. Thus the heating water assignation can be changed in relation to the
outdoor temperature within upper and lower borders, which are to be fixed.
Setting the upper border of the heating water assignation:
It can be done from submenu
„SETTINGS” -> „Heat min. Thmах”
as it can be fixed within
30 - 85 С.
Setting the lower border of the heating water assignation:
It can be done from submenu
„SETTINGS” -> „Heat min. Thmin”
as it can be fixed within
15 - 30 С.
The Controller default settings regarding the heating water are as follows, lower border
20 С and upper border 85 С.
Depends on the Controller application there are two ways for keeping the heating water
temperature:
A)
With a room thermostat
– in case there is no a signal from the room thermostat, the
heating water temperature is being kept by the equithermal regulation, as the upper
border assignation of the heating water is 50 С.;
B)
Without a room thermostat
– equithermal regulation.
