Operating instructions

10 Instructions for use ecoTEC / 838402-05
4.5 Domestic hot water with ecoTEC combination
boilers
The boiler must only be used when the heating system
contains water (see 4.3.2).
4.5.1 Setting the water temperature
2
3
plus/exclusive pro
Fig. 4.9 Setting the water temperature
• Switch on the appliance as described in section 4.4.
• The domestic hot water temperature can be adjusted
using the hot water temperature control (3).
• Turn the control clockwise to increase the tempera-
ture and anti-clockwise to decrease the temperature.
This corresponds to:
- left limit approx. 35 °C
- right limit max. 65 °C.
h
Note
This control adjusts the maximum domestic hot
water temperature. If adjusting the control up-
wards appears to have no effect on the temper-
ature, then the boiler is already operating at
full output for the selected flow rate.
When you adjust the required temperature, the set
value is shown in the display (2).
After five seconds the display returns to standard mode
(the current heating flow temperature).
a
Caution
If you live in a hard water area please do not
set the control knob (3) above the mid (12
o’clock) position to prevent excessive scale for-
mation.
4.5.2 Switching the warmstart function on and off
The warmstart system of the ecoTEC combination boil-
ers provides you with hot water at the required temper-
ature immediately. To do this, the hot water heat ex-
changer of the ecoTEC is kept at a pre-selected temper-
ature level and the boiler will therefore periodically op-
erate to maintain this temperature.
ecoTEC plus and ecoTEC exclusive
b
a
b
c
1
1
Fig. 4.10 Switching the warmstart system on and off with
ecoTEC plus and ecoTEC exclusive
• Activate the warmstart system by briefly turning the
knob (1) all the way clockwise (position a).
Then select the desired hot water outlet temperature
again, e.g. setting b (refer to Section 4.5.1). The appli-
ance automatically adapts the hot holding temperature
to the set hot water temperature. The tempered water
is directly available at the taps; the symbol
flashes in
the display.
• Switch off the warmstart system by briefly turning the
knob (1) all the way anti-clockwise (position c). The
symbol
disappears. Then select the required hot
water outlet temperature again, e.g. setting b.
4 Operation