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System 2B:
with 1 tank, 1 circulating pump and 3 probes.
(Self-regulating circulating pump, No metering, With excess heat dissipation).
- Assigning of terminals and block diagram.
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
130
1
2
3
NTC
B
4
5
PT1000
C
6
7
PT1000
D
8
9
10
11
12
S3
M Bi B N
P1
256
cod. 3540V011 - 03/2017 (Rev. 00)
25
24
23
22
21
20
19
18
17
16
NC
15
FREE
14
CONTACT
COM
FREE CONTACT
13
NO
S1
S2
Symbol Description
256 The contacts must not be connected and must
be suitably protected
R Relay
F Fuse
Necessary
Optional
230 Vac
50 Hz
L
L
AUX 2
F
(230 Vac)
N
NA
NC
R
C
M
L
AUX 1
(230 Vac)
N
T1
EN
N
B G/V
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