3. INSTALLATION for contractors cont...
12
Connecting a circulation line to the cylinder
A circulation line can be implemented with its return
connected to the upper half of the cylinder ( Fig. 5,
item 4 ) . The heat losses incurred in the circulation
line and the electrical power consumption of the re-
spective circulation pump, reduce the efficiency of
the system. The cooled down water in the circulation
line mixes with the cylinder content. Where possible,
avoid installing a circulation line. Where it is not pos-
sible, control the circulation pump thermally or by a
time switch.
Fill the cylinder with water before switching on power.
3.4 Electrical connection
The WWK 300 is to be hard wired to a dedicated circuit with a line fuse rating of 16 A. Before con-
necting the power to the unit, verify that switch 1 is set to OFF (0) (see Fig.1 ).
Fig.8.
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