Function Description; Display And Control Elements; Control Functions - Viessmann VITOLIGNO 300-P Service Instructions Manual

Function description

Display and control elements

G
F
A Display
B Back key
C Cursor keys or setting values
D Confirmation

Control functions

Heating circuit control unit
Brief description
■ The control unit comprises two heating
circuits 1 and 2 with mixer M1 and M2.
■ The set flow temperature of every
heating circuit is determined from the
following parameters:
– Outside temperature
– Set room temperature
– Operating mode
– Heating curve slope and level
■ A minimum boiler water temperature
that must be maintained to protect the
boiler is specified via the boiler coding
card.
114
A
Idle state
Boiler
Outside temp.
DHW temp. 50°C
B
55°C
8°C
E Menu setting
F Emissions test switch
G Standby
■ The flow temperature of heating cir-
cuits 1 and 2 is regulated by the step-
ped opening or closing of the mixers.
The mixer motor control changes the
actuating and pause times subject to
the control differential (control devia-
tion).
■ Coding addresses that influence the
heating circuit control unit:
9F, A0 to FB.
For a description, see codes overview.
C D
E