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ENGLISH
INSTALLATION
Maintenance and cleaning
Undo the four fixing screws on the casing ring.
Hold the control fascia and pull the casing forwards slightly
so that you can push it over the controller.
Push the casing upwards.
Lift the casing upwards.
Refit the casing after completing your work.
13.2 Removing casing components separately
If you do not have enough space to remove the entire casing from
the top, you can remove the appliance cover and casing ring sep-
arately.
Appliance cover removal
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Turn the appliance cover anti-clockwise.
Lift the appliance cover upwards.
Refit the appliance cover after completing your work.
Note
When fitting the appliance cover, make sure that the air
intake and discharge apertures are positioned correctly.
Removing the casing ring
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Split the casing ring by moving the individual components
together along the joint.
Remove the casing ring.
Refit the casing ring after completing the work.
13.3 Cleaning the evaporator
!
WARNING Injury
The evaporator consists of numerous sharp-edged fins.
Take care when cleaning the evaporator. Wear protective
clothing, especially protective gloves.
To maintain a consistently high appliance output, check the evap-
orator of the appliance regularly for contamination, and clean as
necessary.
Remove the appliance casing (see chapter "Removing the
casing").
Carefully clean the evaporator fins. Only use water and a soft
brush for this. Never use acidic or alkaline cleaning agents.
13.4 Water treatment
Depending on water temperature and hardness, according to DIN
1988-7: 2004-12, the following water treatments should be carried
out:
dH [°]
DHW temperature <60°C DHW temperature > 60°C
0-14 None Periodic descaling necessary (see
chapter "Descaling the appliance")
14-21 Periodic descaling necessary (see
chapter "Descaling the appliance")
Softening
>21 Softening Use is not recommended
Reduce the DHW temperature
Where water quality fluctuates significantly and the DHW temper-
atures are high (>60°C), we recommend annual inspection by a
qualified contractor.
13.5 Descaling the appliance
!
Material losses
Always use standard cleaning agents approved for use
with DHW cylinders to descale the appliance.
To descale the appliance, proceed as follows:
Reduce pressure in the DHW cylinder by drawing off water.
Isolate the DHW cylinder from the heating system.
Connect a flush tap to the appliance.
Descale the primary pump and plate heat exchanger.
Reconnect the heating system to the DHW cylinder.
Refill the DHW cylinder (see chapter "Commissioning/ Filling
the DHW cylinder").
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