Vaillant ecoTEC plus 612, Instructions For Installation And Servicing

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10
Instructions for use ecoTEC
4.5.2 Switching the warmstart function on and off
The warmstart system of the ecoTEC combination boi-
lers provides you with hot water at the required tempe-
rature immediately. To do this, the hot water heat
exchanger of the ecoTEC is kept at a pre-selected tem-
perature level and the boiler will therefore periodically
operate to maintain this temperature.
ecoTEC plus:
b
c
b
a
1
1
Fig. 4.10 Switching the warmstart system on and off with
ecoTEC plus
• 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 .
ecoTEC pro:
b
a
b
c
1
1 2
2
Fig. 4.11 Switching the warmstart system on and off with eco-
TEC pro
• Activate the warmstart system by briefly turning the
knob ( 1 ) all the way clockwise (position a ). The green
LED ( 2 ) lights up.
Then select the required temperature, e.g. setting b ,
see 4.5.1.
The water is kept at a constant temperature of 55 °C
and is available immediately as you turn on a tap.
• Switch off the warmstart system by briefly turning the
knob ( 1 ) all the way anti-clockwise (position c ). The
green LED ( 2 ) goes out. Then select the required hot
water outlet temperature again, e.g. setting b .
4.5.3 Drawing hot water (ecoTEC combination boilers
only)
1
Fig. 4.12 Drawing off hot water (example: ecoTEC plus)
On opening a hot water tap ( 1 ) at a supply point (basin,
shower, bath, etc) the ecoTEC combination boiler will
automatically operate to deliver hot water.
On closing the tap the boiler switches OFF (or continues
to operate for central heating if required).
4 Operation