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System 3B:
with 1 tank, 1 circulating pump and 4 probes.
(No modulating circulating pump, Metering, With excess heat dissipation).
- Assigning of terminals and block diagram.
The second accessory NTC probe must be purchased
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
1
NTC
A
2
3
NTC
B
4
5
PT1000
C
6
7
PT1000
D
8
9
10
11
12
S3
P1
256
S4
cod. 3540V011 - 03/2017 (Rev. 00)
25
24
23
22
21
20
19
18
17
16
NC
15
FREE
14
CONTACT
COM
13
NO
X2
X1
4
1
8
1
Display
ECOTRONICH tech
B
B
S1
S2
Symbol Description
S4 (A) Solar return NTC probe
S1 (D) Upper tank PT1000 probe
256 Circulating pump signal (PWM versions only)
ECOTRONIC tech
230 Vac
50 Hz
L
AUX 2
(230 Vac)
N
L
AUX 1
(230 Vac)
N
FREE CONTACT
M
M
T1
Necessary
Optional
125
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