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System 2:
with 1 tank, 1 circulating pump and 3 probes.
(No modulating circulating pump, No calculation, With boiler activation/deactivation).
- Assigning of terminals and main diagram.
1
2
3
NTC
B
4
5
PT1000
6
7
PT1000
8
9
10
11
12
P1
During normal operation, if the temperature of Hot Water Tank Sensor S2 is lower than the Thermostat activation
temperature parameter value (Installer parameter, default equal to 40°C) then the ECOTRONIC tech regulator
activates the output Relay connected to terminals 13-14-15 (FREE CONTACT on the 11-pin connector); whereas
if the temperature of Hot Water Tank Sensor S2 is higher than the Thermostat deactivation temperature parameter
value (Installer parameter, default equal to 45°C) then the ECOTRONIC tech regulator deactivates the output
Relay connected to terminals 13-14-15 (FREE CONTACT on the 11-pin connector).
The contact is voltage-free and with exchange contact: NC 14-15, NO 13-14.
To signal the boiler activation mode, the Contact symbol will be lit.
25
24
C
23
SOLAR
CIRCULATING
22
PUMP
D
21
20
19
AUX 2
18
17
AUX 1
16
NC
15
FREE
14
CONTACT
COM
S3
13
NO
OUT
S1
S2
IN
Cod. 3540V010 - 07/2010 (Rev. 00)
ECOTRONIC tech
230 Vac
50 Hz
L
AUX 2 (230 Vac)
N
L
AUX 1 (230 Vac)
N
FREE CONTACT
OUT
IN
Symbol
Description
S2 (B)
Lower tank
NTC probe
S3 (C)
Solar Collector
PT1000 probe
P1
Solar
Circulating Pump
AUX 2
Closes in
case of fault
AUX 1
Closes
Shutter
S1 (D)
Upper tank
PT1000 probe
T1
Activation/deactivation
contact
Boiler
Flow switch/Flowmeter
Necessary
Optional
T1
103
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