Viessmann WB2-44 - Page 25

Initial Start-up and Service
25
Steps (continued)
27. Check extension k it for heating circuit with mixing valve Accessory
Initial start-up
1. Check via Scan 1 on the
programming unit whether the
connected extension kit is
recognized.
Calling up Scan 1
Open the cover:
Menu option Button
→ SYSTEM ”D”
→ OPERATING
STATUS ”B”
→ CONTINUE ”A”
until
”Scan 1”
is
displayed
Please note:
The third and fourth-placed digits
from the left have the following
meaning:
(__02__ = with burner control unit
(__12__)= additionally with Vitocom
100
(__03__ = with burner control unit
and variable speed heat
circuit pump
(__13__)= additionally with Vitocom
100
(__06__ = with burner control unit
and extension kit for
heating circuit with mixing
valve
(__16__)= additionally with Vitocom
100
(__07__ = with burner control unit,
extension kit for heating
circuit with mixing valve
and variable speed heating
circuit pump
(__17__)= additionally with Vitocom
100
Rotational direction switch
Power supply switch ” ”
2. If the extension kit is not recog-
nized, check the coding of the
heating system type (see page 49).
Check mixing valve motor
1. Select rotational direction of the
mixing valve motor.
H Switch setting I for boiler return
from left (factory default setting).
H Switch setting II for boiler return
from right.
2. Relay test
Switch power supply switch on t he
motor off and on again. The unit will
perform the following self-test:
H Close mixing valve (150 sec)
H Pump ON ( 10 sec)
H Open mixing valve ( 10 sec)
H Close mixing valve ( 10 sec)
After that normal control mode is
resumed.
3. Observe the rotational direction of
the mixing valve motor during the
automatic relay test of the extension
kit.
Afterwards, position the mixing
valve by hand in the ”Open” setting.
Please note:
The extension kit is only recog-
nized when connected via the
KM-BUS, not when connected via the
Viessmann 2-wire BUS.
Please note:
Please reference Installation
Instructions of Mixing Valve
Actuator.
The supply temperature sensor must
now measure a higher temperature.
If the temperature is lower, either the
rotational direction of the motor is
incorrect or the mixing valve insert is
incorrectly fitted.
5285 961 v1.3
B
A
DC
-
+
i
3
4
5
6
7
8
9
10
2
1
3
4
5
6
7
8
9
10
2
1
0
S
1
0
I II