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ECOTRONIC tech
System 2A:
with 1 tank, 1 circulating pump and 3 probes.
(No modulating circulating pump, No metering, With additional heating).
- Assigning of terminals and block diagram.
P1
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
122
1
2
3
NTC
B
4
5
PT1000
C
6
7
PT1000
D
8
9
10
11
12
CONTACT
X2
X1
4
1
8
1
Display
ECOTRONICH tech
S3
256
cod. 3540V011 - 03/2017 (Rev. 00)
25
230 Vac
50 Hz
24
23
L
22
N
21
20
19
18
17
L
16
N
NC
15
FREE
14
COM
FREE CONTACT
13
NO
B
M
B
M
S1
S2
Symbol Description
S1 (D) Upper tank PT1000 probe
256 Circulating pump signal (PWM versions only)
Necessary
Optional
AUX 2
(230 Vac)
AUX 1
(230 Vac)
T1
EN
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