9
3.2.6 Thermostat function heating system (
"heating system"
) (Appendix 10, illustration F)
The thermostat function heating system allows for warming up a warm water service
tank by a heating tank. If an adjustable temp. (menu parameter:
"heating system ON"
)
on sensor T3 falls below 3 adjustable time windows (menu parameter
: "indexing time
1: ... "
) the circulation pump P2 at output R2 is activated. The circulation pump
remains in operation as long as an adjustable switch-off temp. is reached (menu
parameter:
"heating system OFF"
or as long as the time window in question is
exceeded.
Preset configurations are
"heating system ON:45°C"
and
"heating system OFF: 52°C"
.
For safety reasons ON and OFF values are interlocked. Both values can be adjusted
against each other up to a maximum difference of 3 Celvin .
The indexing times of the integrated automatic time switch are preset to "indexing
time 1: 06.00 to 09.00 h", "indexing time 2: 12:00 to 14:00 h" and "indexing time 3: 18:00 to 21:00 h". Winter and
summer daylight saving time are not preset configurations and must be adjusted manually, if needed.
Indexing times can be changed as follows:
Select indexing time be pushing the buttons
. Press one of them for 2 sec and change the time by pressing
.
Finally press OK for 2 sec to store this configuration.
If you cannot select the desired thermostat function another one is already activated.
For safety reasons the thermostat functions storage cooling, heat coasting and circulation have been interlocked on
software basis. So please switch off one thermostat function first and then switch on another one.
Note:
Please note that a circulation pump can be triggered with either 230 V [optional 115 V] (e. g. old heating tanks)
directly (preset terminal board must be installed) or indirectly via a separate tank control (e. g. gas condensing boiler)
or the power-free output R2 (preset terminal board must be removed, or else tank control may be destroyed).
Note:
The controller offers the thermostat function storage cooling. Please follow the relevant VDE norms for the proper use
of the system.
3.2.7 Thermostat functions circulation control
The controller offers the possibility to trigger a circulation pump via output R2.
This pump can be triggered temperature-linked by an additional temperature
sensor at T4 or time-linked by certain time windows. Both functions may be
combined at any time. The combination of the following circulation functions
allows for reducing circulation to a minimum. This saves energy for operating the
pump, reduces circulation losses in the pipelines and improves warmth bedding in
the service water tank. Circulation losses in detached houes may easily amount to
10 to 30 % of the energy that is need for warm water supply.
If you cannot select the desired thermostat function another one is already
activated. For safety reasons the thermostat functions storage cooling, heat
coasting and circulation have been interlocked on software basis. So please switch
off one thermostat function first and then switch on another one.
A) temperature-linked circulation control
(
"temp.-linked circulat. contr."
)
(Appendix 10, illustration G):
This function needs an additional temperature sensor T4 at the return of the circulation pipeline. After falling below
the adjustable value (menu parameter:
"circulation ON"
) the circulation pump switches on and remains in operation
until the switch-off value - also adjustable - (menu parameter:
"circulation OFF"
) is reached. In order to avoid wrong
measurements due to heat transfer of the pipeline you should provide for a minimum of 1.50m to the storage basin
when you install the sensor.
Note:
If you intend to use a calorimeter in addition to this function (paragraph 3.3.2) you can only use it "with
restrictions". As in this case the sensor T4 is used as circulation sensor the controller automatically registers the heat
quantity from temperatures T1 and T4 and the external volume flow measuring device´s discharge.
B) Time-linked circulation control
(
"time-linked circulat. contr."
)
(Appendix 10, illustration H)
Without an additional temp. sensor a circulation pump may be operated via three different time windows. During the
adjusted time window the pump will be in operation for the corresponding period of time. First of all you have to
chose a time within the menu parameter. By selecting one of the indexing times 1 to 3 certain circulation cycles may
be selected manually.
Indexing times can be changed as follows:
Select indexing time be pushing the buttons
. Press one of them for 2 sec and change the time by pressing
.
Finally press OK for 2 sec to store this configuration.
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