Dhw Start Optimisation - Viessmann VITOCAL 300-G Installation And Service Instructions Manual

6007/6008 DHW/booster heater hysteresis
The set value determines the deviation
from the set DHW cylinder temperature
("Cylinder temperature DHW 6000") at
which DHW heating is started and stop-
ped. Parameter "DHW hysteresis
6007" relates to DHW heating with the
heat pump. Parameter "Booster heater
hysteresis 6008" specifies the hystere-
sis for heating with the instantaneous
heating water heater (on site).
A Set DHW temperature
B Heat pump hysteresis ("DHW hys-
teresis 6007")
Delivered condition
Setting range

6009 DHW start optimisation

"Start optimisation 6009"
Comfort function for DHW cylinder heat-
ing.
C Booster heater hysteresis ("Boos-
D Actual DHW temperature at the top
E Heat pump switching state
F Booster heater switching state
G OFF
H ON
Note
■ The value selected for "DHW hyste-
resis 6007" should be higher than the
expected temperature drop due to
heat losses during reduced heating
mode (approx. 5 K).
■ A lower value for "Booster heater
hysteresis 6008" increases the pro-
portion of DHW heating with the boos-
t
ter heater.
■ Observe setting for "DHW with e
heating 6015".
"DHW hysteresis 6007"
70 (≙ 7 K)
10 to 100 (≙ 1 to 10 K)
Parameter group DHW
(cont.)
ter heater hysteresis 6008")
cylinder temperature sensor
"Booster heater hystere-
sis 6008"
100 (≙ 10 K)
20 to 700 (≙ 2 to 70 K)
Operating instructions
191