Troubleshooting
63
Corrective Action
(continued)
Check accessory kit for heating circuit with mixing valve
Checking the rotational direction of the mixing valve motor:
1.
Switch ON/OFF switch
A
at the
accessory kit first OFF and then ON
again. The device will perform the
following self-check:
H
Mixing valve ”Close” (150 sec.)
H
Pump ”ON” (10 sec.)
H
Mixing valve ”Open” (10 sec.)
H
Mixing valve ”Close” (10 sec.)
Then standard control mode
resumes.
2.
Note the rotational direction of the
mixing valve motor during its
self-check. Then set the mixing
valve manually to ”Open” again.
The supply temperature sensor must
now read a higher temperature.
If the temperature drops, either the
motor is turning in the wrong direction
or the mixing valve set is installed
incorrectly.
Installation Instructions
Mixing Valve
Changing the rotational direction of the mixing valve motor (if required):
1.
Remove the lower and upper housing
of the accessory kit.
Installation Instructions
Mixing Valve Accessory Kit
2.
Change the rotational direction
switch:
Switch position
I
for system return
from the left (factory default
setting).
Switch position
II
for system return
from the right.
5
4
4
3
2
0
7
v
1
.5
A
Fig. 25
IMPORTANT
B
A
A
ON/OFF switch
B
Rotational direction switch
Fig. 26
