Part 2: Overview of display values and settings
Expert
area
47
T-HS DHW
(increase during HW operation)
Boiler temperature setting with hot water preparation =
hot water temperature s T-HS DHW
!
The boiler must be run at a higher temperature
during hot water preparation so that the hot water
temperature in the storage tank can be reached via
the heat exchanger.
HYST DHW
(hot water hysteresis)
Hot water preparation is started when the temperature of
the hot water storage tank drops below the temperature
setting by the hysteresis [HYST DHW]. The hot water
preparation stops when the storage tank reaches the
temperature setting (the temperature setting is set to 65°C
during hot water short time heating operation).
DHW FOLLOWUP
(pump run-down time)
00 min => Standard function: The charging pump
continues to run for 5 minutes after the burner has
switched off.
If heat is requested by a heating circuit the run-down is
cancelled.
The charge pump blocking kicks in and can also cause the
run-down function to be cancelled.
greater than 00 min => The charge pump runs down by the
set time when storage tank charging is complete. The
after-run can only be cancelled by the activated charge
pump blocking.
THERM INPUT
(storage tank with thermostat)
00 => Hot water preparation via storage tank sensor
01 => Hot water preparation via thermostat:
The hot water preparation is started by a short circuit at the
storage tank sensor connecting terminals. It stops when
the short circuit is removed.
WALL HUNG
(for modulating HS)
Boiler temperature setting with hot water preparation =
hot water actual tempe T-HS DHW
With this function the exhaust gas losses occurring during
hot water preparation can be reduced with modulating heat
generator using the adapted boiler temperature setting.
LOAD THROUGH
(only with F12 = T-DHW-LOWER)
The charge through function can be activated by
connecting a hot water storage tank, lower, sensor.
T-DHW = Temperature of hot water tank in removal area
(plug I, pin 6+7)
Storage tank charging:
ON: T-DHW < T-DHW DES - HYST DHW
OFF: T-DHW L > T-DHW DES
The charging process of the storage tank only terminates
when the lower storage tank set temperature has been
reached.
