P32-EN – Subject to technical changes 04.11
42
“Functions” Menu Overview
9.4 Hot water requirement function “WW_REQ.1”
Menu, plain text
Factory
Own
setting
Setting
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WW REQUIREMENT
DES.: WW_REQ.1
FUNCTION STATUS:
INPUT VARIABLE:
OUTPUT VARIABLE:
WARM WATER TEMP.:
T.WW.ACT: 48°C
T.WW.NOM: 48°C
48
TIME PROG:
T.WW_MIN: 0°C
0
DIFF.ON: 9.0 K
9.0
DIFF.OFF: 12 K
12
Burner perf.: 100%
100
Description
: This function controls the hot water heating of
your system. All factory settings enable convenient water
heating according to the hygienic continuous flow principle.
• “T.WW.ACT”
: The temperature at S1 (buffer top).
Other parameters are explained in the section
“Possible
settings”
.
• “TIME PROG”
: It is used to call up the time program
with the time windows for auxiliary heating of the hot
water buffer area to generate hot drinking water. The
factory settings are specified
in the upper table on
page 17
. Outside of these times, hot drinking water can
only be drawn off until the hot water buffer has cooled
down.
Hot water control menu overview, “WW_REQ.1”
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HELP
SERVICE
WW_REQ.1
F:10
TI
M
E PROG:
REQUIRE
M
ENT:
Status: OFF
T.WW.NO
M
:
48
°C
Operat.Syst: Ax.xxEN
Setting the target hot water temperature
Possible settings
:
• “T.WW.NOM”
: for setting the individual target hot water
temperature, factory setting: 48°C.
The primary side of the system for water heating is
limited by a thermal mixing valve to 65°C. This is
why the target hot water temperature cannot be
higher than 55°C.
The lower the target hot water temperature, the
more energy you save. One degree lower results
in an increased solar coverage of approx. 1%.
Legionella are not a problem here as the hot water
is always freshly generated. If you chiefly take
showers, you can set the temperature to 42 to
44°C, depending on the insulation and length of the
hot water pipes. If you chiefly take baths, the tem-
perature should be around 46 to 48°C.
In the Function overview, turn the rotary wheel until the
pointer is at “T.WW.NOM” (
figure bottom right
). Now
change the value by pressing, turning and pressing the
rotary wheel again.
• “T.WW.MIN”
: The hot water minimum temperature is the
target value for the hot water temperature outside of the
auxiliary heating times. The hot water buffer temperature
is kept at 12 to 15°C for the lowest setting (0°C, factory
setting). This saves the most energy.
