Palazzetti GLH110 Manual De Instalación, Uso Y Mantenimiento página 28

In the following conditions the PWM can be setup with the following parameters:
➢ ANTIFREEZE: U03, U13 e U23
➢ SAFETY: U04, U14 e U24
➢ ANTISEIZE:
U05, U15 e U25
FLOW SWITCH TYPE
In the hydrauilc plants where the Flow Switch is expected, the sensor type is selected through P33 parameter:
➢ P33 = 1, management of ON/OFF type Flow Switch input;
➢ P33 = 2, management of Flow Switch input through a flow rate sensor that gives a square wave signal with
frequency according to the flow rate.
If a flow rate sensor (P33=2) is used, the selection of the minimum flow rate to detect is set by the parameter P34.
The ELTEK sensor (code 10.0884.00.03) connections are:
GND = pin 16 (GND); OUT = pin 15 (SEG); IN = pin 18 (+V)
The frequency value according to the flow rate (at 30°C) is as follow:
l/min Hz
2 11,9
4 26,2
6 40
8 53,7
10 67,5
12 81,8
The selection of the flow rate to detect is set by the parameter P34: the set value must be twice the value the corresponding
frequency. For example if the flow rate is 2 l/min, you need to set P34=24
In order to detect even smaller flow rate in the hydraulic circuit, we recommend to set P34=5.
28
SOLAR Profile
004778250 - 30/03/2020
On the basis of this profile it is advisable to set
the PWM duty cycle parameters as shown
below:
PWM2
Vmin: U01 >= 15%
Vmax: U02 <= 95%
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0CAR6IN019147