111
2.
1.
Fig. 70
Drain the heating water side of the heating system
(secondary circuit and process circuit, see page 104).
1.
Cut through the cable ties.
2.
Release 4 clips and pull the plate heat exchanger
from the pipes.
Note
During and after removal, small amounts of water
may trickle from the plate heat exchanger.
3.
Check all 4 connections for contamination and
scaling. Replace plate heat exchanger if required.
4.
Install in reverse order using new gaskets.
5.
Fill and vent the heating system (see pages 41
and 44).
Mixer extension kit
Checking the setting of rotary selector S1
The rotary selector on the PCB of the extension kit
defines the assignment to the relevant heating circuit.
Heating circuit
Rotary selector S1
setting
Heating circuit with mixer M2
(heating circuit 2)
2
2 3
4
5
6
1
0
9
8
7
Heating circuit with mixer M3
(heating circuit 3)
4
4
2 3
5
6
1
0
9
8
7
Checking the rotational direction of the mixer motor
After being switched on, the appliance performs a self-
test. During this, the mixer is opened and closed again.
Note
The mixer motor can also be started via the actuator
test (see chapter "Checking outputs").
Observe the rotational direction of the mixer motor dur-
ing its self-test.
Then manually set the mixer to "OPEN".
Note
The flow temperature sensor must now capture a
higher temperature. If the temperature drops, either
the motor is turning in the wrong direction or the mixer
insert is incorrectly fitted.
Mixer installation instructions
Maintenance
Checking the plate heat exchanger
5678 044 GB
Maintenance
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
Page 163: ...163 5678 044 GB ...