Ferroli ECOTRONIC HiTech Manual Del Usuario página 194

System with one tank, one circulating pump and three probes.
(Modulating circulating pump, metering, No supplementary heating/No excess heat dissipa-
tion).
- Assigning of terminals and block diagram.
S4 S4 - V1 S3 S3 S2 S2 S1 S1
P1
S3
/ / / /
Symbol Description
F Fuse
P1 Solar circulating pump
R Relay
S1 Probe PT 1000 Solar collector
S2 Probe PT 1000 Lower tank
S3 Probe PT 1000 Solar return
194 EN
/
S1
M
/ / / / /
/
256
code 3542A420 - Rev. 00 - 12/2021
R3 R3 R2 N L N R1 N
/ / / / / / /
Bi
B
N
S2
Symbol Description
256 Modulating circulating pump signal
ECOTRONIC HiTech
/
L
F
NC
NA
R
C
/ / / / /
230 Vac
N