14. Maintenance
WARNING Electrocution
Before any work on the appliance, disconnect all
poles from the power supply.
Draining the appliance
You can drain the appliance for maintenance work or to
protect it from frost.
WARNING Burns
Hot water may escape when the appliance is being
drained.
» 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 qualified 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 ~ 380 - 415 V
1 Heater
2 High limit safety cut-out
3 Safety pressure limiter
Load shedding relay LR 1-A
2
1
1 Control cable to the contactor of the second appli-
ance (electrical storage heater for example).
2 Control contact opens when switching the instanta-
neous water heater on.
b04
35
b02
b03
40
b04
27