:++50'& :++5'&
23
Maintenance
Chapter 8
8.2 Installer maintenance
Installer maintenance includes cleaning the heat exchanger
and fans. Dependent on the conditions, this must done about
once every three years.
1
Switch off the appliance on the control panel (simultane
ously press keys "
OK
” and “
-
´DQGIRUVHFRQGVDQG
switch off the power supply.
2SHQWKH¿OWHUGRRU
5HPRYHWKH¿OWHUV
3
Remove the front cover
4 If the appliance is equipped with the optional bypass unit,
it must now be removed.
First remove the display (see item 7 for appliance without
bypass unit) and unscrew the four hexagon socket bolts
0[SXOOWKHFRQQHFWRUVDQGUHPRYHWKHE\SDVVXQLW
from the appliance.
5
Remove the heat exchanger. Be careful not to damage the
foam parts in the appliance.
6
Clean the heat exchanger using hot water (55°C max.) and
a regular detergent. Rinse the exchanger with hot water.
,IWKHDSSOLDQFHFDPHH[IDFWRU\ZLWKDE\SDVVWKHQ¿UVW
remove the valve control device from the sliding grate.
$
Without bypass unit
With bypass unit
Without bypass unit
With bypass unit
Only for WHHRDC equipped with the optional bypass unit!
