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Expert area
Part 2: Overview of display values and settings
36
Hot water
Designation Value
range
Default
IV
DHW RELIEF
00, 01
(OFF/ON)
01 = ON
PARALLEL
00, 01, 02, 03
01
T-BOILER DHW
00K – 50K
20K
HYST DHW
5K – 30K
5 K
DHW FOLLOWUP 00 min – 30
min
00 min
THERM INPUT
00, 01
(OFF/ON)
00 = OFF
WALL HUNG
00, 01
(OFF/ON)
00 = OFF
RETURN
Exit level using
Ä
DHW RELIEF
(charging pump lock)
The charging pump is not switched until the heat generator
temperature exceeds the storage tank temperature by 5K.
It is switched off when the HS temperature drops below the
storage tank temperature. This prevents the storage tank
from being cooled by the boiler when hot water preparation
starts.
PARALLEL
(Pump parallel running)
00 => Hot water priority operation: The heating circuits are
blocked during hot water preparation. The mixers close
and the heating circuit pumps switch off.
01 => HW partial priority: The heating circuits are blocked
during hot water preparation. The mixers close and the
heating circuit pumps switch off. The mixer circuits are
enabled again when the HS has reached the temperature
of hot water temperature s HS superheating [T-
DHW + T-BOILER DHW]. If the HS temperature drops
below the enable temperature by the switching hysteresis
[HYST DHW] again, the mixer circuits are blocked again.
02 => Pump parallel running: Only the direct heating
circuits are blocked during hot water preparation. The
mixer circuits continue to be heated. The hot water
preparation is extended by this function.
03 => Pump parallel running also for the direct heating
circuit: During hot water preparation all heater circuits
continue to be heated. The hot water preparation is
extended by this function. When the HS temperature
exceeds the maximum flow temperature of the direct
heating circuit by 8K, the heating circuit pump for this
circuit is switched off (overheating protection). The heating
circuit pump is switched on again when the HS
temperature drops below the temperature [maximum flow
tempe 5K].