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INSTALLATION
Maintenance
Undo the screw that fastens the appliance cover to the top of
the fascia.
Remove the fascia and the appliance cover.
Carefully clean the evaporator fins. Only use water and a soft
brush for this. Never use acidic or alkaline cleaning agents.
14.4 Draining the cylinder
WARNING Burns
Hot water may escape when draining the DHW cylinder.
To drain the DHW cylinder, e.g. when shutting the appliance down,
proceed as follows.
Isolate the appliance from the power supply.
Close the shut-off valve in the cold water inlet line.
The DHW cylinder is drained via the cold water supply line.
Open the drain valve installed in the cold water supply line
(see chapter "Water connection"). If no drain valve has been
installed, undo the cold water supply line at the "Cold water
inlet" connection.
To vent the system, undo the DHW line connected to the
"DHW outlet" connection.
Some residual water will remain in the bottom of the DHW cyl-
inder.
14.5 Descaling the electric emergency/booster
heater
Only descale the flange of the emergency/booster heater after
disassembly. Never treat the inside of the DHW cylinder or the
impressed current anode with descaling agents. The electric
emergency/booster heater is screwed into the DHW cylinder of
the appliance at a central point at the top.
D0000039351
1
1 Electric emergency/booster heater with protective anode
14.6 Valves
Regularly check all valves in the system and replace if necessary
to ensure the operational reliability of the appliance. The amount
of limescale deposits depends on the local water quality.
Check all valves in the system and remove limescale deposits.
Replace the valves if necessary.
Check the function of the valves.
14.7 Condensate drain
Check whether the condensate drain is clear of obstructions.
Remove contaminants.
14.8 Replacing the power cable
WARNING Electrocution
The power cable must only be replaced (for example if
damaged) by a qualified contractor.
14.9 Fitting the casing ring
WARNING Electrocution
Reconnect the earth cable to the casing ring.
D0000034814
Fit the upper casing ring. The casing ring overlaps along the
joint. A tab on one end clips into the recess at the other end
of the casing ring.
Secure the casing ring with screws.
Fit the pipe collar of the condensate drain and the conden-
sate drain bend.
14.10 Fitting the appliance cover
WARNING Electrocution
Reconnect the earth cable to the appliance cover.
Place the cover back on the appliance.
Connect the cable linking the batteries with the internal con-
trol unit to the back of the fascia.
Replace the fascia.
Secure the appliance cover and the fascia with the screw at
the top of the control fascia.
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