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1.35 CIRCULATION PUMP AND LOAD LOSSES.
Victrix Hybrid is supplied with a variable speed circulator.
In the central heating mode, the following operating modes are
available and can be selected from the control panel.
NOTE.: the ∆T can be controlled compatibly with the characte-
ristics of the central heating system and of the indoor unit.
•
∆T Constant (A3 = 5 ÷ 25 K):
the pump speed varies to
maintain the ∆T constant between the system flow and re-
turn according to set value K. Two values can be set for ∆T
(Par. 3.6): one for the operation of the outdoor unit and one for
when the integration with the indoor unit is active.
•
Fixed:
by setting the parameters at the same value, the pump
operates at constant speed. For the hybrid heat pump to work
properly, it is not allowed to drop below the minimum value
indicated above.
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 con-
trol.
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.
To see in detail the meaning of the red LED, please refer to the rele-
vant paragraph 3.7 “Possible problems and their causes”.
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 prolonged period of inactivity, the circu-
lation pump is blocked, turn the motor shaft using a screwdriver.
Take great care during this operation to avoid damage to the motor.
By-pass Regulation (Part. 21 Fig. 39).
ATTENTION:
The indoor unit comes out of the factory
with the by-pass closed.
For a correct operation of the system, the by-
pass must be kept closed.
Pump release.
If, after a prolonged period of inactivity, the circu-
lation pump is blocked, turn the motor shaft using a screwdriver.
Take great care during this operation to avoid damage to the motor.
