12
Installation instructions 0020140122_04
12
230 V~ 0 ...24 V
12f
VR 66
NTC
BUS
- +
2 1
DHW OFF
N L
DHW ON
N L
CH1
N L
230V~
N L
230 V~
230 V~
CYL
2 1
CH2
CYL
CH1
DHW ON
DHW OFF / CH2
BUS
NTC
2
2
M
9b1
M M
9e
M
DHW
230 V~
230 V~ 0 ...24 V
L
N
X1
230 V~
X12
L
N
L
N
BUS
24V=
RT
- +
Burn.
off
X13
Opt.2
X16
Opt.1
X100
X41
X40 X51
X35
X31
X32
0( )
0( )
DCF
RF
AF
FB
1
ecoTEC plus
X36
M
9b2
M
38
12q
BUS
PWR
LAN
VR 921
230 V~
12a
b
38 If a thermostat shall be used, instead of the DHW tempera-
ture sensor; remove the DHW temperature sensor, mount
the thermostat, and connect the thermostat on clamp ‘CYL’.
