4 | Parameters overview
48 B1820023_en | Service handbook Lambdatronic H 3200 - T4e
4.2.2 Water - Temperatures
Set DHW temperature
When this DHW temperature is reached, DHW tank
loading is stopped.
Reload if DHW tank temperature is below
If the DHW tank temperature falls below the value set
here, the time window is active and the loading source
(boiler or buffer tank) indicates the set loading increase,
and the DHW tank loading is started.
Load if temperature difference between boiler and
DHW tank is
If the boiler temperature is above the current DHW tank
temperature by this value and the time window is active,
DHW tank loading starts (only for systems without a buffer
tank).
Setpoint for temperature difference between boiler
and DHW tank
Adjust the boiler temperature setpoint to reach the desired
DHW tank temperature.
Boiler temperature setpoint = Set DHW temperature +
difference
If the current boiler temperature setpoint calculated is
higher than the result from the above calculation, the
boiler temperature setpoint is maintained (only for
systems without a buffer tank).
4.2.3 Water - Times
Ü "Setting times" [}106]
4.2.4 Water - Service
Residual heat use
Prerequisite: Hydraulic system 0 and return temperature
control with mixing valve
YES: Diverts the residual heat to the DHW tank. The
"Minimum boiler temperature to release all pumps“
parameter is then ignored. The pump is set to minimum
speed until the boiler temperature is lower than the DHW
tank temperature + 3°C.
Only load DHW tank once a day
▪ NO: DHW loading is always triggered by the DHW tank
temperature falling below the value that is set under
„Reload if DHW tank temperature is below“ and the
time window is active and the heat source (boiler or
buffer tank) indicates sufficient temperature.
▪ YES: If in the current day the DHW tank has already
been loaded once, any further DHW tank loading is
prevented.