Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 82 / 160

Standard setting -30 K Setting range -30 to +30 °C
Frost protection temperature
The equipment enters reduced mode
to protect itself against frost, as soon
as the average outside temperature
drops below this value. This will be
implemented independent of the set-
ting of the operating mode selector.
The OFF point of the frost protection
is set 2 K higher than the ON point.
A
Outside temperature
B
Frost protection temperature (can
be selected)
C
Frost protection OFF point (frost
protection tempe 2 K)
D
Reduced heating mode OFF
E
Reduced heating mode ON
Access
&
" System settings "
&
" Program "
&
" System definition "
&
"Frost protection T" (
1
/
!
)
Standard setting 1 °C
Setting range -15 to +15 °C
Primary pump ON for natural cooling
This setting determines whether the
primary pump of the
heat pump is to
run or not during cooling operation.
Note
For the system versions suggested
from page 18, the primary pump of the
heat pump
must also run.
Temperature limit for reduced temperature mode
(cont.)
82
System definition control settings
55
92
901
GB