1. OPERATING INSTRUCTIONS
cont..
1.6 Maintenance and cleaning
The WWK 300 is largely maintenance free. Any maintenance, however, must only be carried out by
qualified contractors.
The first inspection of the protective anodes is due after two years. Have the anodes checked regu-
larly after that. Your contractor, who will be familiar with your local water quality, will advise you of the
optimum timing for all maintenance. The Pressure Temperature Relief (PTR ) valve is recom-
mended to be replaced at intervals not exceeding 5 years
*
. The same rating valve MUST replace the
existing one.
1.7 Operation and control
Description of functions
− Switch ( 1 ) switches the heat pump ON or OFF.
− Using push button ( 2 ) you can activate a single quick heat-up of the cylinder via the
electrical supplementary heater as mentioned before. After the top third of the cylinder
capacity has reached a DHW temperature of 65°
C, the electrical supplementary heater is
switched OFF and will not be automatically switched ON again. Press this button only once
and only to cover for a peak demand.
− An indicator lamp is integrated into the push button ( 2 ) , which lights when the electrical
supplementary heater is switched ON.
− Select the DHW temperature with the rotary selector ( 3 ) of the thermostat. Turn dial
clockwise until it stops, this is the maximum temperature of 60°
C.
− The time switch ( 4 ) is equipped with a week disc comprising 84 switching segments. The
shortest switching period is 2 hours long. Segments pressed inwards towards the disc centre
( a pprox 2mm lift ) are switched ON.
− The DHW display sensor captures the DHW temperature inside the upper third of the cylinder
( a pprox. 100 litres )
6
Fig. 1
The temperature selector must be set to MAX 60
o
C
to comply with AS/NZS 3500.
*This valve is not manufactured by STIEBEL ELTRON but by RMC and this is their recommendation
2 4
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