Overview Of Electrical Connections - Viessmann SDIO Installation And Service Instructions For Contractors

Installation sequence

Overview of electrical connections

Danger
Incorrect wiring can lead to serious injury from
electrical current and result in appliance dam-
age.
■ Route extra low voltage (ELV) leads < 42 V
and 42 V/230 V~ cables separately.
>
Only strip the minimum of insulation from
■
cables as close as possible to the terminals
and bundle tightly to the corresponding termi-
nals.
■ Secure cables with cable ties.
SDIO/SM1A electronics module
SDIO/SM1A
aVG % &
jF
TS1 TS2
aVG
KM-BUS
jF
PLUS-
BUS
Fig. 1
Cylinder temperature sensor, NTC 10 k
%
standard delivery) with plug
Collector temperature sensor, NTC 20 k
&
standard delivery)
Temperature sensor, NTC 10 k
/
delivery)
Temperature sensor, NTC 10 k
aÖ
delivery)
Transfer pump or 3-way diverter valve
sS
!
Please note
Electronic assemblies can be damaged by static
loads.
Before beginning work, touch an earthed object
such as a heating or water pipe to discharge any
static.
10
/ aÖ [{]
PWM
TS3 TS4
L ? N
(TS1,
Ω
%
(TS2,
Ω
(TS3, standard
Ω
(TS4, standard
Ω
F1 T 2 A
sS sF fÖ
L ? N N L
?
M
1~
230 V∼
50 Hz
M
1~
Solar circuit pump (only with PWM signal)
sF
fÖ Power supply
PlusBus for connection to the HMU heat man-
jF
agement unit, DIO electronics module or ADIO
electronics module
KM-BUS for connection to the Vitotronic boiler
aVG
control unit
PWM Solar circuit pump speed control
Note
Apply strain relief to on-site cables.
Seal any unnecessary apertures with cable grommets
(not cut open).