18
ANTIFREEZE FUNCTION
In case the delivery probe measures a temperature lower than 7°C, the circulator is
activated.
If the temperature goes down the value of 4°C the m ain heat exchanger is ignited until the
delivery temperature has reached 20°C. The antifree ze function is active also with the
boiler turned OFF
(function in standby mode but with bright switch on)
.
TANK REQUEST
(Jumper JP9 = 0)
Standby or with simultaneous heating request: in this case if the temperature measured
by the tank probe is lower than the tank setpoint - 1°C, is activated the control G5 related
to the tank resistance.
When the temperature measured by the probe tank is higher than the tank setpoint, the
control G5 is disconnected.
Sanitary flow switch request: when a request gets by the sanitary flow switch, the control
G5 related to the tank resistance is activated independently by the temperature.
In ECO Mode is not activated any resistance of the primary heat exchanger.
In the COMFORT mode simultaneously are also checked the controls G1, G2. G3, G4 relative
to the primary heat exchanger bringing the flow temperature to the setpoint value tank plus a
differential set with parameter N°7.
At the end of the request the pump is fueled for a time equal to the value set by parameter N°3.
ANTILEGIONELLA FUNCTION
The system checks continuously the tank temperature.
If within a certain time lapse the temperature does not reach 65°C, the tank resistance is
automatically ignited in order to avoid bacterium growth.
The time of intervention of legionella function is 3 hours by the first ignition and then every
7 days.
Pre-heat exchanger primary: when COMFORT is activated in standby condition the primary heat
exchanger temperature is maintained in order to ensure a prompt response of the sanitary sector.
The primary heat exchanger is maintained at a temperature equal to the Setpoint plus a tank
temperature difference can be set by parameter N°7.
DHW DEMAND INSTANTANEOUS
When receiving a request by the microswitch sanitary, the circulator is powered and controlled
commands are G1, G2, G3, G4 relative to the primary heat exchanger leading the delivery
temperature to the setpoint value sa a differential be set with parameter N°7.
At the end of the request the pump remains powered for a time equal to the value set by
parameter N°3.
DEGASSING FUNCTION
The degassing function is activated by simultaneously pressing the keys J4 and J7.
During this function are altered states of operation to maximum and minimum speed of the
circulating pump PWM in order to facilitate the escape of air bubbles from the hydraulic circuit.
The sequence is illustrated below.
When this function is on the display shows a timer indicating the time at the end of the function.
V
el. MA
X
(15 sec)
Vel. MIN
(20 sec)
Vel. MIN
(120 sec)
Vel. MAX
(5 sec)
Vel. MIN
(5 sec)
2
cycles
60
cycles
Summary of Contents for BP-L series
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