Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 85 / 160

This setting determines the control
range for starting and stopping the
heat pump. The shutdown point of the
heat pump is determined by the mini-
mum brine inlet temperature ("
min. T
brine entry ").
A
Brine inlet temperature
B
" min. T brine entry "
C
" Hyst. primary temp. "
D
Heat pump ON
E
Heat pump OFF
Access
& " System settings "
& " Program "
& " Heat pump "
& "Hyst. primary temp."
or
"min. T brine entry" (
1
/
!
)
Standard setting Setting range
"Hyst. primary temp." 5 K 1 to 20 K
" min. T brine entry " -4 °C -10 to +20 °C
Minimum runtime
Setting the minimum heat pump run-
time. The heat pump will only stop
after expiry of this time. The control
unit uses the signal
"Critical excess"
to make the consumers draw off heat
(for consumer response, see page 99
and 104).
This setting is designed to reach long
heat pump runtimes to achieve high
efficiency and low wear.
Access
&
" System settings "
&
" Program "
&
" Heat pump "
&
"min. operation time" (
P
/
Q
)
min. T. primary in/Hysteresis T primary
85
Heat pump control settings
55
92
901
GB
Service