Immergas VICTRIX OMNIA Instructions And Recommendations page 36

1.30 WAVE 3 CIRCULATION PUMP
During central heating mode, the Auto and Fixed operating
modes are available.
- Auto (A5 = 0): automatic circulator pump speed and propor-
tional head: the circulator pump speed varies according to the
power supplied by the burner, the greater the power the greater
the speed. Moreover, within the parameter, one can also adjust
the circulator pump operating range by setting the maximum
speed "A3" parameter (adjustable from 6 to 9) and the "A4" min-
imum speed parameter (adjustable from 6 to max set speed).
- ΔT Constant (A5 = 5 ÷ 25 K): the pump speed varies to main-
tain the ΔT constant between the system flow and return ac-
cording to set value K (A5 = 15 Default).
- Fixed (6 ÷ 9): by setting parameters "A3" and "A4" at the same
value, the pump operates at constant speed.
For the boiler to work properly, it is not allowed to drop
below the speed minimum value.
In domestic hot water mode, the circulator pump always
runs at full speed.
Pump LED.
The LED flashes green when the pump is powered and the pwm
control signal is connected.
The LED lights up steady green when the pump is pow-
ered and the signal cable disconnected. In these condi-
tions the pump works at maximum and without control.
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Alarm warnings.
If the pump detects an alarm, the LED switches from green to red;
this can mean one of the following failures:
- low supply voltage;
- rotor seized;
- electrical error.
For a detailed description of the meaning of the red LED, refer to
(Parag. 3.6).
The LED, in addition to being green or red, can also re-
main off.
It is normal for the LED to be off when the pump is not
powered, whereas with the pump powered, the LED
must be lit: if switched off, it means there is a fault.
Pump release.
If after a long period of inactivity, the circulator is blocked, adjust
the screw in the centre of the head in order to manually release the
motor shaft.
Take great care during this operation to avoid damage to the mo-
tor.
Bypass Adjustment (Parag. 1.32).
The boiler leaves the factory with the bypass open.
If necessary, the by-pass can be regulated to system requirements
from minimum (by-pass closed) to maximum (by-pass open).
Adjust using a flat head screwdriver, turn clockwise and open the
by-pass, anticlockwise it is closed.
The by-pass ensures minimum circulation of the water
in the boiler and correct operation of the appliance if the
systems are divided into more than one zone.