11
Operating manual ecoCRAFT 0020058717_03
4.4.2 Deactivating the storage tank mode
On units connected to domestic hot water cylinders, you
can deactivate the hot water generation or recharging
operation whilst keeping the heating system in opera-
tion.
• Turn the rotary knob for setting the hot water tem-
perature all the way to the left. Only the frost protec-
tion function for the cylinder remains active.
h
Note
When using a VRC 430, turn the rotary knob to
the clockwise end stop and switch the cylinder
circuit to "Off" on the VRC 430.
4.4.3 Drawing off the hot water
When you turn on a hot water tap at a drawing point
(wash basin, shower, bathtub etc.), hot water is supplied
from the connected tank.
If the water in the tank falls below the set temperature,
the appliance starts up automatically and reheats it. The
appliance switches off when the water in the tank reach-
es the set temperature. The pump continues to run for a
short while.
4.5
Setting for the heating mode
4.5.1
Setting the flow temperature (no controller
connected)
2
1
Fig. 4.6 Setting the flow temperature without a controller
If there is no external controller, set the flow tempera-
ture using the knob (
1
) according to the outside temper-
ature. We recommend the following settings:
–
Left position
(but not all the way) in spring and au-
tumn: Outside temperature approx. 10 to 20
°C
–
Mid-position setting
in reasonably cold weather:
Outside temperature approx. 0 to 10
°C
–
Right position
in very cold weather:
Outside temperature approx. 0 to –15
°C
When you adjust the temperature, the value specified is
shown in the display (
2
). This display disappears after
3 seconds and is replaced by the standard display (cur-
rent heating flow temperature or water pressure in the
system (optional).
The settings at the rotary knob (
1
) are normally infinite-
ly variable up to a flow temperature of 75 °C. However,
if you have higher values set on your appliance or if it is
limited to lower values, your heating engineer will have
made a corresponding adjustment to permit or prevent
operation of your heating system with higher flow tem-
peratures.
4.5.2 Setting the flow temperature
(using a controller)
2
1
Fig. 4.7 Setting the flow temperature when using a controller
Your heating installation should comply with the Build-
ing Regulations in either England and Wales, Eire Scot-
land or Northern Ireland.
In this case you must make the following adjustment:
• Turn the main switch (
1
) to the "
I
" position.
• Turn the rotary knob (
2
) for setting the heating flow
temperature fully clockwise.
The flow temperature is automatically adjusted by the
controller (for information see the appropriate operat-
ing manual).
Operation 4
