CONDEXA PRO
52
Managing the heating demand in the high temperature circuit by analogue input (Par. 14=2 or 3)
The room thermostat in the high temperature circuit is ignored for the heating demand, and the input signal is used to
calculate the output or the system set point.
There is just one analogue input (see terminals 13-14 on the wiring diagram on page 34) on the Master board and this
can also be used for the low temperature circuit (Par.22). The analogue input cannot be used for both the circuits.
ANALOGUE INPUT FOR HEAT OUTPUT, PAR. 14=2 (PAR. 22=2 FOR LOW TEMPERATURE CIRCUITS)
The demand for the high temperature (low temperature) circuit is made according to the following rules:
0-2Vdc:
no demand from the high temperature (low tem-
perature) circuit
2-9Vdc:
2-9Vdc: the demand for heat is converted into
an output demand for each Slave. An input of 2V
corresponds to minimum output, 9V to maximum
output (Par.15). Between 2V and 9V the output is
calculated linearly. The hysteresis for the end of
the demand is 0.2V and therefore the demand is
active above 2V and ends below 1.8V.
The burner starts when:
Outlet Temp.
≤
Setpoint_Ch_high (Par.1) –
Ch_high_mod_hist_on (Par.19)
(Outlet Temp.
≤
Setpoint_Ch_low (Par.3) –
Ch_low_mod_hist_on (Par.26))
The burner stops when:
Outlet Temp. > Setpoint_Ch_high (Par.1) +
Ch_high_hist_off (Par.20)
(Outlet Temp. > Setpoint_Ch_low (Par.3) +
Ch_low_hist_off (Par.27))
Voltage (Volt)
0
1
2
3
4
5
6
7
8
9
10
Heat output (kW)
50
100
150
200
250
ANALOGUE INPUT FOR TEMPERATURE, PAR. 14=3 (PAR. 22=3 FOR LOW TEMPERATURE CIRCUITS)
The demand for the high temperature (low temperature) circuit is made according to the following rules:
0-2Vdc:
no demand from the high temperature (low tem-
perature) circuit
2-9Vdc:
the demand for heat is converted into an output
requirement for each Slave, by the PID_CH_high
(PID_CH_low) algorithm. 2V corresponds to a
set point of T_Ch_high_foot, Par. 18
(T_Ch_low_foot, Par. 24), 9V to a set point of
Setpoint_Ch_high, Par.1 (Setpoint_Ch_low,
Par.3). Between 2V and 9V the set point is cal-
culated linearly. The hysteresis for the end of the
demand is 0.2V and therefore the demand is
active above 2V and ends below 1.8V.
The burner starts when:
Outlet Temp.
≤
Setpoint_ch_high (Par. 1) –
Ch_high_hist_on (Par 19)
(Outlet Temp.
≤
Setpoint_ch_low (Par. 3) –
Ch_low_mod_hist_on (Par.26))
The burner stops when:
Outlet Temp. > Setpoint_ch_high (Par. 1) +
Ch_high_hist_off (Par. 20)
(Outlet Temp. > Setpoint_ch_low (Par. 3) +
Ch_low_hist_off (Par. 27)).
Voltage (Volt)
0
1
2
3
4
5
6
7
8
9
10
Setpoint
10
20
30
40
50
60
70
80
90
Содержание CONDEXA PRO 100 S
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