44
MAIN MENU settings
6 720 617 763 (2008/09)
6.3.5 Parameters for domestic hot water
Menu: Domestic hot water > Parameter
•
Cylinder temp at heating level Comf.
:
This menu option is only active if
Domestic
hot water > DHW programme > As heating
programme
is set (
Æ
Section 6.3.1 on
page 40). This is where you set the desired
domestic hot water temperature for your
domestic hot water cylinder.
•
Cylinder temp at heating level Eco
:
This menu option is only active if
Domestic
hot water > DHW programme > As heating
programme
is set (
Æ
Section 6.3.1 on
page 40). This is where you set the desired
reduced domestic hot water temperature for
your domestic hot water cylinder.
•
DHW priority
: Use this menu if your heating is
not to be switched off during cylinder heating
(e.g. for buildings with limited insulation and
low outdoor temperatures).
–
Priority
: The heating is switched off during
DHW heating.. The pumps stop and the
mixers are closed.
–
Conditional priority
: During DHW heating
the heating circuits carry on heating, the
pumps run and the mixers regulate to the
desired temperature. The unmixed heating
circuit is switched off to prevent overheat-
ing. Cylinder heating takes longer with
Conditional priority
•
DHW circ pump cycles
:
This menu option is only active if the system
has a domestic hot water circulation pump.
The circulation pump stops during the circula-
tion pump
Off
phases. This menu option spec-
ifies how many times per hour the circulation
pump will cycle during the circulation pump
On
phase. With the setting:
–
1 per hour
to
6 per hour
, each circulation
pump cycle lasts for 3 minutes.
–
7 per hour
, the circulation pump runs con-
tinuously during the
On
phase.
For menu structure and adjustment ranges
Æ
page 33.
6.3.6 Thermal disinfection of domestic hot
water
Menu: Domestic hot water > Thermal disinfec-
tion
This menu is only active if your domestic hot
water is provided by a domestic hot water cylin-
der. We recommend that you carry out thermal
disinfection at regular intervals. For larger
domestic hot water systems, there may be a legal
requirement for thermal disinfection.
If you have a combination boiler, please refer to
the guidance in the boiler documentation.
•
Operating mode
:
–
Auto
: Thermal disinfection starts automat-
ically according to the set starting condi-
tions. The thermal disinfection can be
switched on and cancelled manually.
–
Manual
: Thermal disinfection can be
started from
Operating status
.
If the thermal disinfection function
triggers the safety cut-out on the
solar cylinder (HLC) the solar wa-
ter heating is inactive. The control-
ler indicates a fault (
Æ
Section 9,
Warning:
Risk of scalding
Domestic hot water can cause se-
vere scalding.
B
Only carry out thermal disinfec-
tion at times when the system is
not normally in use.
B
Inform occupants of the building
of the danger of scalding and al-
ways monitor the thermal disin-
fection process.
