Wolf BWL-1 S Installation And Operating Instructions Manual page 109

Cleaning the evaporator on
the BWL-1S(B)
Cleaning the condensate pan /
condensate drain
Cleaning the casing
Cleaning the dirt trap / sludge
separator
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54. Maintenance / cleaning
In areas with high concentrations of dust or pollen, shorter cleaning intervals
Please note
may be necessary alongside the mandatory annual inspection and cleaning, in
order to ensure that the system operates efficiently. Adjust the cleaning interval
to suit the local conditions.
The evaporator must be checked annually for dirt/contamination and cleaned if
necessary. Wet cleaning with a commercially available garden hose is recommended.
Contaminated fins may reduce the system's transfer performance and consequently its
energy efficiency, and in the worst case scenario may result in system failure.
When cleaning, ideally use a wide nozzle with a spray angle of 15° -20°. To prevent
damage to the fins, direct the water spray at the evaporator surface from the front at an
angle of 90°. When cleaning, the water pressure should not exceed 2 - 3 bar.
Never spray the fins from the side, as this may cause them to become deformed
Please note
or bent. Maintain a distance of approx. 20 cm to 30 cm from the evaporator
surface.
Before the heating season, remove any dirt (leaves, twigs, sludge, etc.) from the
condensate drain.
Before opening the appliance, ensure that all power circuits are isolated from
the power supply.
When cleaning, avoid using sharp or hard objects in order to prevent damage to the
evaporator and condensate pan.
In extreme weather conditions (e.g. drifting snow), ice may occasionally form on the
intake and discharge grilles. In this event, remove any ice and snow from the intake
and discharge areas to ensure the minimum flow rate.
Regularly check and clean the condensate pan to ensure correct drainage. Check
and clean the condensate drain hose. For correct drainage, ensure that there is a
continuous fall.
The appliance can be cleaned with a damp cloth and commercially available detergents.
Never use abrasive cleaners or detergents containing acid or chlorine on the appliance
surfaces.
Install a sludge separator in the heating return. This ensures that neither particles nor
dirt can get into the plate heat exchanger (condenser) of the heat pump. Condenser
blockages and any resulting high-pressure malfunctions are thereby prevented.
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