Dhw Management - Siemens TUTORbit POL687 Instructions For Installation, Use And Maintenance Manual

4 - INSTALLATION

4.12 - DHW management

The DHW temperature is set in Parameters->DHW->DHW
setpoint.
There are two DHW modes:
- "All power" DHW
The heating service for the DHW tank is carried out with the
"All power" mode: when DHW is requested, all the modules
are converted to meet the DHW requirement and when the
request for DHW is stopped, all the modules return to perform
the heating service.
To have this operating mode, the Configuration->System-
>Module n parameter must be on Heating for all the heat
modules making up the cascade. The hydraulic diagram for
this operating mode is shown in Figure 4-9.
For mixed heating circuits, parallelism is controlled between
the DHW and the heating: when DHW is requested, if the
cascade sensor in Parameters->DHW priority->Pump
lock offsetup drops below its setpoint, the active heating
circuit(s) switch off and only switch on when the sensor
temperature Water Heater T. has returned to its setpoint,
minus Parameters->DHW priority->Pump unlock offsetup.
Figure 4-9 - "All power" DHW diagram
TUTORBIT
- "Distributed power" DHW
The heating service for the hot water tank is carried out with
the "Distributed power" mode: when DHW is requested, only
the module(s) in the Configuration->System->Module n =
DHW parameter convert(s) to load the DHW tank and when
the hot water tank is full, the module(s) return to the heating
service. The hydraulic diagram for this operating mode is
shown in Figure 4-10.
DHW produced by heat pump
Tutorbit is able to integrate the production of DHW with a
heat pump when the outdoor temperature is higher than
Parameters -> Heat Pump -> DHW Cutoff Temp. In this
case, any heating demand are interrupted to give total priority
to the heating of the boiler by the heat pump.
If time has passed Parameters -> Heat Pump -> Maximum
time DHW and the storage tank has not yet warmed up,
Tutorbit stops the heat pump and the heating cycle of the
storage tank is ended by the module.
ATTENTION!!! This operation system may leave the
heating inactive for a long time. If this should happen
and it is not very comfortable, it is advisable to exclude
the heat pump from the production of domestic hot water
by setting Parameters -> Heat Pump -> DHW Cutoff Temp
= 45°C.
18
COSMOGAS