Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 94 / 160

If an external heat source is present, it
can be used in conjunction with the
electric heater for drying buildings
using this setting.
Access
& " System settings "
& " Program "
& " Internal hydraulic "
& "Ext. HS for drying buildings"
( YES/NO )
Standard setting YES
Setting range YES/NO
Hysteresis, flow
The set flow temperature of the sec-
ondary circuit is determined by the
control unit in accordance with the
current heat demand.
The "
Hysteresis, flow " setting
defines, at what difference from an
internally calculated set flow tempera-
ture one of the heat sources (heat
pump, electric heater) is switched ON
and OFF.
Access
& " System settings "
& " Program "
& " Internal hydraulic "
& "Hysteresis flow" (
0
/
=
)
Standard setting 2.0 K
Setting range 0.5 to 5.0 K
Internal pump run-on
Secondary pump run-on, after the
heat pump or the electric heater has
stopped generating heat.
Access
&
" System settings "
&
" Program "
&
" Internal hydraulic "
&
"Off-carr. int. pump" (
P
/
Q
)
Standard setting 02:00 min
Setting range 00:10 to
05:00 min
External heat source for drying buildings
94
Internal hydraulics control settings
55
92
901
GB