Viessmann Vitodens 100 WB1A Installation And Service Instructions Manual page 25

Installation Requirements
H Control unit
K Cylinder thermostat
L Room temperature control (on
site)
Connection of Viessmann
Vitotrol 100 see page 42
M Time switch
N Frost stat
O Open therm-connection(alterna-
tive)
Connection see page 42
P Connection box (not supplied)
R Fuse 3 A
&
The following Viessmann control
configurations are available:
Constant temperature
Timer with constant temperature
Vitotrol 100 UTD
&
The boiler requires a permanent live
feed via plug 40.
Hydraulic components in the boiler
Pump
The available head shown in following
figure is that in excess of the appli-
ance hydraulic resistance, i.e that
available for the system.
(cont.)
S Mains ON/OFF switch
T When connecting, remove bridge
U Temporary filling loop
V Water mains
fÖ Power supply
gH Mains connection accessories/
room temperature control/DHW
cylinder control
LR Connection of room temperature
control
LS Connection of DHW cylinder con-
trol
&
The DHW cylinder must have an
integrated temperature control con-
nected to the Vitodens 100
&
The DHW will always take priority
over the central heating when timed
demand is selected.
Preparing for installation
25