Flow setpoint boost
(5020)
The boiler temperature setpoint for charging the DHW storage tank consists of
the DHW temperature setpoint and the flow setpoint boost.
Transfer boost
(5021)
Through the transfer, energy can be moved from the buffer storage tank into the
DHW storage tank. For this the current buffer storage tank temperature must be
higher than the current temperature in the DHW storage tank. This temperature
difference is set here.
Type of charging
(5022)
Charging a layer storage:
- Charging: The first charging of each day will heat-up the hot water tank com-
pletely.
- Re-charging : all the following re-charges afterwards will heat-up the water
above the hot water sensor.
-
Re-charging
: In general, the demand of domestic hot water is controlled by the
upper tank sensor TWF (B3).
-
Charging
: The demand of domestic hot water is controlled by the two tank sen-
sors (B3) and TLF (B36).
-
Charging Legio
: Legionella function being active: both sensors control the de-
mand of domestic hot water, otherwise the upper sensor TWF (B3) only.
-
Charging 1. Charge
: During the 1st charge of the day: both sensors control the
demand of domestic hot water, otherwise the upper sensor TWF (B3) only.
-
Full charg 1st time legio. Charge
: During the 1st charge of the day: both sensors
TWF (B3) and TLF (B36) control the demand of domestic hot water, otherwise
the upper sensor TWF (B3) only.
Switching diff
(5024)
If the DHW temperature is lower than the current setpoint minus the switching
difference set here, the DHW charging is started. The DHW charging is ended if
the temperature of the current setpoint is reached.
At the first DHW release of the day, a forced charging is performed.
The DHW charging is also started if the DHW temperature is within the switching
difference - as long as it is not less than 1 K under the setpoint.
Charging time limitation
(5030)
During the DHW charging, the room heater - depending on the selected charging
priority (prog.no. 1630) and the hydraulic switch – has too little or no power. Of-
ten it is therefore practical to restrict the time of DHW charging.
Discharging prot
(5040)
The function ensures that the DHW pump (Q3) first switches on if the temperate
in the heat generator is sufficiently high.
Application with sensor
The charging pump is first switched on if the heat source temperature is above
the DHW temperature plus the half of the charging increase. If the boiler tempe-
rature drops again below the DHW temperature plus 1/8 of the charging excess
during the charging, the charging pump is again switched off. If two DHW sen-
sors for the DHW charging are parameterized, the lower temperature is consider-
ed for the discharge safety function (normally the DHW sensor B31).
Application with thermostat
The charging pump is first switched on if the boiler temperature is above the
DHW nominal setpoint. If the boiler temperature drops below the DHW nominal
setpoint minus the DHW switching difference, charging pump is again switched
off.
Off:
the function is switched off.
Always:
the function always affects.
Automatic
The function only takes effect if the heat generator cannot deliver heat
or is not available (malfunction, heat source block).
Programming
358 488 09.10
Gas-fired fuel value boiler EuroCondense three 125-300 kW
59
Содержание Eurocondense three
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