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14. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all
poles from the power supply.
Draining the appliance
The appliance can be drained for maintenance work.
WARNING Burns
Hot water may escape when draining the appliance.
» Close the shut-off valve in the twin connector or the
cold water inlet line.
» Open all draw-off valves.
» Undo the water connections on the appliance.
» If dismantled, store the appliance in a room free from
the risk of frost, as water residues remaining inside
the appliance can freeze and cause damage.
Cleaning the strainer
If dirty, clean the strainer in the threaded cold water fitting.
Close the shut-off valve in the cold water inlet line before
removing, cleaning and refitting the strainer.
15. Specification
15.1 Dimensions and connections
226
190
35
100
c06
c01
190
b02 Entry, electrical cables I
c01 Cold water inlet
c06 DHW outlet
93
b02
50
112
Male thread
G 1/2 A
Male thread
G 1/2 A
Installation - for contractors
Alternative connection options
b04
b02 Entry, electrical cables I
b03 Entry, electrical cables II
b04 Entry, electrical cables III
15.2 Wiring diagram
3/PE ~ 400 V
Priority control with LR 1-A
2
1
1 Control cable to the contactor of the 2nd appliance
(e.g. electric storage heater).
2 Control contact opens when switching the instanta-
neous water heater on.
b04
35
b02
b03
40
b04
25
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