30
Voltage (Volt)
0
1
2
3
4
5
6
7
8
9
10
Power (kW)
50
100
150
200
250
Fig. 31
The burner ignited when:
- Delivery temp. ≤ Setpoint_ch_high (Par.1) – Ch_high_
hist_on (Par.19)
- (Delivery temp. ≤ Setpoint_ch_low (Par.3) – Ch_low_
hist_on (Par.26))
The burner shuts off when:
- Delivery temp. > Setpoint_ch_high (Par.1) + Ch_
high_hist_off (Par.20)
- (Delivery temp. > Setpoint_ch_low (Par.3) + Ch_low_
hist_off (Par.27))
ANALOGUE TEMPERATURE INPUT, Par. 14=3 (Par. 22=3
for low temperature circuits)
The following rules apply to high temperature (low temper-
ature) circuit demand:
0-2Vdc:
no demand by the high temperature (low temper-
ature) circuit
2-9Vdc:
the heat demand is converted into a power de-
mand for each Slave, using the algorithm PID_CH_
high (PID_CH_low). 2V corresponds to a setpoint
equal to T_Ch_high_foot, Par. 18 (T_Ch_low_foot,
Par. 24), 9V to a setpoint equal to SetPoint_Ch_high,
Par.1 (SetPoint_Ch_low, Par.3). The setpoint is cal-
culated linearly between 2V and 9V. Hysteresis for
the end of demand is 0.2V and therefore demand is
present above 2V and stops below 1.8V.
Setpoint
10
20
30
40
50
60
70
80
90
Voltage (Volt)
0
1
2
3
4
5
6
7
8
9
10
Fig. 32
The burner ignited when:
- Delivery temp. ≤ Setpoint_ch_high (Par.1) – Ch_high_
hist_on (Par.19)
- (Delivery temp. ≤ Setpoint_ch_low (Par.3) – Ch_low_
hist_on (Par.26))
The burner shuts off when:
- Delivery temp. > Setpoint_ch_high (Par.1) + Ch_
high_hist_off (Par.20)
- (Delivery temp. > Setpoint_ch_low (Par.3) + Ch_low_
hist_off (Par.27))
MIX VALVE MANAGEMENT
The mix valve is controlled by the parameters:
- Mix_valve_step_open_time: Par.28 preset to 5s
- Mix_valve_step_close_time: Par.29 preset to 7s
- Mix_valve_interval_time: Par.30 preset to 5s
- Mix_valve_p_hyst: Par.31 preset to 2°C
- Mix_valve_still_hyst: Par.32 preset to 2°C
Before opening or closing, the valve waits the period of
time set in Par.30.
Opens if:
T_mandata_bassa < Setpoint_low – Par32
Closes if:
T_mandata_bassa > Setpoi Par32
Within the interval, the valve remains in its current position.
If:
T_mandata_bassa < Setpoint_low – Par31
opens for a period of time equal to half the value set in Par.
28
If:
T_mandata_bassa > Setpoi Par31
closes for a period of time equal to half the value set in Par.
29.
Time (s)
0
20
15
10
5
Manifold temperature
-5
5
15
25
35
45
55
Fig. 33
Summary of Contents for Power Plus Box 1002 P INT
Page 1: ...Installation Manual CONDENSING Power Plus Box 1002 1003 1004 P INT EXT Installation Manual EN...
Page 36: ...36 12 WIRING DIAGRAMS...
Page 37: ...37 Valvola 2 vie Circolatore...
Page 42: ...42...
Page 43: ...43...
