Viessmann Vitodens 200, Service Instructions Manual

Page: 53 / 116

53
Control unit for constant temperature mode
Function description
Heating mode
The set boiler water temperature will
be maintained when a demand is
being raised by the room
temperature-dependent clock
thermostat, and the heating program
is set to central heating and
DHWĂ" rw ".
If there is no demand, the boiler
water temperature will be held to the
preselected frost protection
temperature (5Ă º CĂćĂburner ON,
50Ă º CĂćĂburner OFF).
The circulation pump characteristics
after burner shutdown can be
selected with positionĂ"S
Ă
1" of the
heating program selector switch
(see pageĂ55).
The DHW cylinder can be briefly
heated (if installed) to 60Ă º C by
setting the heating program selector
switch toĂ"S
Ă
4" (see pageĂ56).
You can select limited system frost
protection using positionĂ"S
Ă
6" of the
heating program selector switch
(see pageĂ57).
A Gauge
B Rotary selector
"Heating water temperature"
C Rotary selector
"DHW temperature"
D Burner fault display
E Burner fault reset
F Emissions test switch
G Burner operation display
H System ON/OFF switch
K Heating program selector switch
9 Standby mode
w Only DHW
rw Heating and DHW
L Display
M N/A
5692Ă485
G
B
0
1
2
3
4
0
T1
T2
S1
S2 S3 S4
S5
S6
S7
+ -
50
+ -
70
H
D B
C E F G
K
L
M
A