20
DHC 8 8,8 kW _ 32 °C 21 °C 16 °C 13 °C
Type Power* 2 l/min 4 l/min 6 l/min 8 l/min 10 l/min
7044.01
Fig. 2
* 230 V Volt supply
Table 1
Operating Instructions
(for the user and the qualified installer)
Legend to Figure 2
1 “Power“ light
➪ ➪
➪ ➪
➪ Unit is heating up
2 “Overheating“ light
➪ ➪
➪ ➪
➪ Unit is
overheating
Description of the unit
The DHC hydraulically-controlled
instantaneous water heater heats the
water while it is flowing through the unit.
The heating power is switched on
automatically in the event of the minimum
flow rate being exceeded. The “Power”
light (Fig. 2, Item 1) indicates that the
heating system is switched on.
Key facts in brief
The DHC is equipped with an overheating
protection system. In the event of
overheating, the heating power will be
switched off, and the “Overheating” light
(Fig. 2, Item 2) will come on. After a
cooling-off phase, the unit will automati-
cally switch the heating power back on,
and the “Overheating” light will go out. If
the unit is overheating, this indicates that
the incoming water volume is too small
➪➪➪ ➪➪➪
➪➪➪ ➪➪➪
➪➪➪ Open the fitting wider.
The outlet temperature can be reduced by
increasing the flow rate or by mixing in
cold water. The hot water output depends
on the capacity of the unit, the cold water
temperature, and the flow rate.
Table 1 shows the temperature rise of
particular units as a function of the flow
rate. If these volumes are added to the
cold water temperatures which prevail at
the installation location, the particular hot
water temperature in each case can be
obtained.
Care
A damp cloth is all that is needed to look
after the housing of the unit. Do not use
any effervescent cleaning agents or agents
with a potentially solvent effect.
Maintenance
Maintenance work may only be
carried out by a qualified installer. Page
28 provides a summary of faults which
you can deal with yourself.
21
Temperature increase
DHC 3 3,0 kW 22 °C 11 °C 7 °C 5 °C 4 °C
DHC 3 U 3,5 kW 25 °C 13 °C 8 °C 6 °C 5 °C
DHC 4 4,4 kW 32 °C 16 °C 11 °C 8 °C 6 °C
DHC 6 6,6 kW _ 24 °C 16 °C 12 °C 10 °C
DHC 6 U 6,6 kW _ 24 °C 16 °C 12 °C 10 °C
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