Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 110 / 160

Temperature/time profile 3 (to
ÖNORM)
A
Flow temperature
B
Days
Temperature/time profile 4
A
Flow temperature
B
Days
Access
& " System settings "
& " Program "
& " Heating circuit "
& " Heating circuit 2 "
& "Screed function" (
l
/
m
)
Standard setting 0
Setting range 0 to 15
Mixer active zone/dead zone
The dead zone
C
determines the
fluctuation range around the set flow
temperature in which the mixer does
not respond (is at zero volts).
As soon as the flow temperature
leaves this zone (above or below) the
mixer motor starts to cycle with a cer-
tain pulse modulation (mixer active
zone,
B
and
D
).
Outside the active zone, the mixer will
be permanently closed
A
(above the
active zone) or open
E
(below the
active zone).
Screed function
(cont.)
110
Heating circuit control settings
55
92
901
GB