Instructions for the installer
44
Internal connections
DK
:
. . . . . . . . . . low water pressure swich
SR
:
. . . . . . . . . .
CH NTC flow probe 10k Ohm at 25°C B=3435
SRT
:
. . . . . . . . .
CH NTC return probe 10k Ohm at 25°C B=3435
SS
:
. . . . . . . . . .
NTC DHW probe 10k Ohm at 25 °C B=3435
FL
:
. . . . . . . . . .
flow switch
VG
:
. . . . . . . . . . gas valve
TL
:
. . . . . . . . . . limit thermostat
E
:
. . . . . . . . . . .
ignition/detection electrode
P
:
. . . . . . . . . . . boiler pump
V
:
. . . . . . . . . . . asynchronous fan (only CTFS)
PV
:
. . . . . . . . . . air pressure switch (only CTFS)
TF
:
. . . . . . . . . .
flue gas thermostat (only CTN)
0CREMOTO04
:
OpenTherm Remote Control (optional)
TA
:
. . . . . . . . . . room thermostat (option)
Connections performed by the installer
1-2
:
. . . . . . . . . . room thermostat (TA)
3-4
:
. . . . . . . . . .
OpenTherm Remote Control
3.17.1 Relationship between temperature and nominal resistance of all NTC probes (B=3435)
T (°C)
0
2
4
6
8
0
27203
24979
22959
21122
19451
10
17928
16539
15271
14113
13054
20
12084
11196
10382
9634
8948
30
8317
7736
7202
6709
6254
40
5835
5448
5090
4758
4452
50
4168
3904
3660
3433
3222
60
3026
2844
2674
2516
2369
70
2232
2104
1984
1872
1767
80
1670
1578
1492
1412
1336
90
1266
1199
1137
1079
1023
Tab. 13 Relationship between "Temperature and Nominal resistance" for temperature probes