Siemens POL955, Instructions For Installation, Use And Maintenance Manual

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20 TUTORBIT
COSMOGAS
4 - INSTALLATION
4.13 - Shuffle pump
The shuffle pump is set in Configuration->System->Shuffle
pump type
and has the following selections:
- Anti-legionella
- Tank load
- Absent
- Anti-legionella
To select the shuffle pump as “Anti-legionella”, the solar
zone must first be enabled in Configuration->System->
Solar = Yes
.
Together with the solar system, there is a solar hot water
tank sensor that is used to start or stop the anti-legionella
cycle and, at the same time, the shuffle pump is also started
to guarantee thermal disinfection of the bottom part of the
hot water tank.
- Tank load
If the shuffle pump is set to load tank, it starts each time
the hot water tank pump starts.
This function is particularly used to load multiple hot
water tanks in series or in parallel.
- Absent
The shuffle pump is missing.
4.14 - DHW return pump
The DHW return pump is controlled by the time slot in
Parameters->DHW->Timer DHW return.
If the DHW return sensor is enabled in Configuration-
>System->DHW return sensor = Yes , the adjustment
temperature can be set in Parameters->DHW->DHW return
setp . In this last case, during the operating time slot, the DHW
return pump stops and then starts again also according to the
set temperature.
4.15 - Solar
To enable the “Solar” function, you need to set Configuration-
>System->Solar = Yes .
The solar zone works by controlling the temperature
differential between the solar panel sensor and the solar hot
water tank sensor.
If the differential is higher than Parameters->Solar->Solar
pump DT on , the solar zone pump starts working.
If the differential is lower than Parameters->Solar->Solar
pump DT off , the solar zone pump switches off.
In Parameters->Solar->Max. Temp. , you can set the
maximum loading temperature of the solar hot water tank.
If the solar panel sensor cools below the Parameters->Solar-
>Min. Temp. , the solar load function stops.
When the solar pump is switched on or off to load the hot water
tank, the relative state is displayed on the row dedicated to
the solar on the main page with ON or OFF .
If the solar panel sensor heats above Parameters->Solar-
>Antistagn On Temp , the solar pump switches on again.
This condition is shown on the system main with ASG , i.e. the
anti-stagnation cycle is working to prevent the water inside
the solar panel from boiling.
If the solar panel sensor continues to heat up over
Parameters->Solar->Antistagn Off Temp , the solar pump
switches off again.
4.12.1 - Anti-legionella
The anti-legionella function differs depending on whether the
hot water tank is loaded only by the modules or also by the
solar zone.
ATTENTION!!! If the Configuration->System->DHW Mode
= Thermostat
parameter is selected, the menu for the
anti-legionella parameters is not displayed because it is
impossible to ensure that the anti-legionella disinfection
is carried out properly with a manual thermostat
- Hot water tank load by the modules and there is no
solar zone
The function is enabled with these parameters:
-
Configuration->System->DHW = Yes
- Configuration->System->DHW Mode = Sensor
-
Configuration->System->Anti-legionella = Yes
- Configuration->System->Solar = No
In this case, the anti-legionella function is carried out on the
hot water tank sensor, connected to terminals X1-M (see
Figure 4-1).
- Hot water tank load by the modules and by the solar zone
The function is enabled with these parameters:
- Configuration->System->DHW = Yes
-
Configuration->System->DHW Mode = Sensor
- Configuration->System->Anti-legionella = Yes
-
Configuration->System->Shuffle pump type = Anti-
legionella
-
Configuration->System->Solar = Yes
In this case, the anti-legionella function is carried out on the
hot water tank sensor but the Anti-legionella cycle start is
requested by the solar hot water tank sensor connected to
terminals X1-M of the POL 945 expansion (see Figure 4-3).
The anti-legionella cycle starts for every period set in
Parameters->Anti-legionella->Frequence and, once
this period has elapsed, the cycle starts at the time set in
Parameters->Anti-legionella->Light-on hour.
The condition of DHW in anti-legionella is displayed as “ ANL ”
on the main page.
- Anti-legionella Forcing from an external input
The Anti-legionella function can be requested with an external
input at any time via the Anti-legionella forcing contact
(Figure 4-3).
The function is enabled if there is the POL 945 expansion with
address “1”and the DHW is with the sensor.
NOTE! To enable the expansion, it is necessary to enable
at least the shuffle pump or solar or heating zone 3.
When the contact Anti-legionella forcing is closed, a DHW
demand is forced to the temperature in
Parameters->Anti-
legionella->Setpoint and will remain in this condition for as
long as the external input is closed.
NOTE! The anti-legionella cycle, as described at the
beginning of this section, takes precedence over closure
of the
Anti-legionella forcing
contact.
NOTE! When the
Anti-legionella forcing
input is closed,
the word “ANL” does not appear in the synoptic as it is
a simple DHW demand to a different setpoint.