Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 111 / 160

A
Mixer permanently closed
B
Mixer closes (modulating)
C
Mixer motor at zero volt
D
Mixer opens
E
Mixer permanently open
T
V
Flow temperature
T
Vs
Set flow temperature
Δ
T
Vh
Active zone
Δ
T
Vt
Dead zone
t Time
Access
& " System settings "
& " Program "
& " Heating circuit "
& " Heating circuit 1/2 "
& "Heat mixer scan band" (
%
/
5
)
or
"Heat mix non-op band" (
=
/
0
)
Standard setting Setting range
" Heat mixer scan band " 4.0 K 2.0 to 40.0 K
" Heat mix non-op band " 1.0 K 0.5 to 3.0 K
"natural cooling" (at the heating circuit)
If all on-site components for the nat-
ural cooling function are installed (at
the heating circuit, see page 12), then
the system definition must be
extended to be able to use that func-
tion.
This setting can also be effected via
the system configuration (see
page 47). Access
&
" System settings "
&
" Program "
&
" Heating circuit "
&
" Heating circuit 1/2 "
&
Natural cooling (" YES "/" NO ")
Standard setting NO
Setting range YES/NO
Mixer active zone/dead zone
(cont.)
111
Heating circuit control settings
55
92
901
GB
Service