Viessmann Vitoligno 300-P Service Instructions For Contractors page 113

Control functions
Soft start at plug gÖ
50
50
N L
A
K
close
1
B
gÖ Closing the mixers
A Contactor relay, part no. 7814 681
B Downstream heating circuit control-
ler, contact closed: Signal for mixer
"Close"
(cont.)
close close
2 n
■ For systems without heating water buf-
fer cylinder
■ The boiler water flow rate in the start-
up phase (e.g. after a weekend shut-
down) must be able to be reduced by
at least 50%
■ Plug gÖ of the control unit is used as
switching contact
■ Required coding: "08:1"
■ Also affects the heating circuits of a
Vitotronic 200-H installed downstream
Function description
113