System Operation With Heat Pump (Hp) In Cooling; Dhw Function With Heat Pump - Siemens TUTORbit POL687 Instructions For Installation, Use And Maintenance Manual

4 - INSTALLATION
4.18.2 - System operation with heat pump
(HP) in cooling
The cooling function is activated only if the outside temperature
is higher than Parameters -> Modules -> Autumn Temp.
When the heat pump is running, it meets the required sensor
temperature Water Heater T. (see diagrams in Section 4.21).
If the temperature of the sensor Water Heater T. drops below
the lower of the temperatures required for the cooling zones
of Parameters -> Heat Pump -> Shutdown Differential HP,
HP is put on standby. If the temperature of the sensor Water
Heater T. returns higher than the required temperatures, the
HP switches on again.
The cooling zone continues to operate with its rules as if
it were in heating only that, instead of following a demand
temperature in heat, it follows one in cool.
During the "Cool" phase, the time program of the cooling zone
can only have two states: "Off" or "Comfort" (on).The other
states "Reduced" and "Precomfort" have no function.

4.18.3 - DHW function with heat pump

When Tutorbit receives a DHW demand, it communicates it
to HP by closing the digital output Q3:
Q3 open > HP not in DHW or low setpoint (depends on how
it is interpreted by HP).
Q3 closed > HP in DHW o high setpoint (depends on how
it is interpreted by HP).
In order to get HP to work in climatic conditions where
efficiency is reasonable, TutorBit calls HP in DHW only if the
outside temperature is higher than Parameters -> Heat Pump
-> DHW Cutoff Temp.
The DHW demand to HP is carried out by closing the Q3
contact, which can be used by the heat pump to change
its logic or increase the supplpy temperature. Tutorbit will
automatically switch the HP from COOL to HEAT (if it is not
already). Any heating demands are interrupted to give total
priority to the heating of the boiler by HP.
If the storage tank does not reach the desired temperature
within the DHW cycle Parameters -> Heat Pump -> Maximum
Time DHW, the HP is interrupted and the boiler heating cycle
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.
COSMOGAS
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TUTORBIT