Viessmann VITOCAL 300, Installation And Service Instructions Manual

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This value determines the period dur-
ing which the DHW cylinder will be
heated when DHW priority has been
enabled. However, this only applies in
case of a simultaneous heat demand
from the heating circuit. Should the
heating circuit not require any heat,
then the DHW cylinder will not be
heated beyond this period but instead
until the selected DHW cylinder tem-
perature has been reached (see oper-
ating instructions Vitocal 300). Access
& " System settings "
& " Program "
& " Heat pump "
& "max. op. time DHW" (
P
/
Q
)
Standard setting 04:00 h
Setting range 00:10 to
18:00 h
Maximum DHW interruption
This value determines the period, dur-
ing which the heating circuit can be
heated when DHW priority is enabled.
The DHW cylinder will still be heated
first (in case of demand) if, after
expiry of this time, there is still a heat
demand from the heating circuit. Access
& " System settings "
& " Program "
& " Heat pump "
&
"max. break DHW "
(
P
/
Q
)
Standard setting 01:30 h
Setting range 00:10 to
18:00 h
Temperature rise per hour
This value specifies, which tempera-
ture rise per hour should be achieved
during DHW heating. The electric
heater will be enabled if the tempera-
ture increase that is achieved using
the heat pump
alone is less than the
selected value.
Note
As a guideline for this setting, it can
be assumed that 1 kW of heat pump
output raises the temperature of
100 litres of water by approx. 10 K/h.
A heat pump with an output of 6 kW
therefore raises the temperature of a
reheat volume of 200 litres by
approx.30 K/h.
Maximum DHW runtime
100
DHW control unit settings
55
92
901
GB