Viessmann Vitodens 100 Installation And Service Instructions Manual page 22

Preparing the installation
Installation Requirements
C Circulation pump
D Feed & expansion tank
E Three way derverter valve
F Radiators
G Drain cock at lowest point in the
system
H Control unit
K Room temperature control (on
site)
Connection of Viessmann
Vitotrol 100 see page 38
22
(cont.)
L Fuse 3 A
M Mains ON/OFF switch
N Connection box (not supplied)
sÖ Circulation pump
fÖ Power supply
gH Mains connection accessories/
room temperature control
LR Connection of room temperature
control