Viessmann vitodens Technical Manual page 52

2.3 Installation in unfinished buildings on unfinished walls
200
Pre-installation in unfinished buildings for subsequent installation of Vitodens 200 and 300 (up to 35 kW)
directly on the wall installation on unfinished walls
300
Required accessories for installations
without DHW cylinder
Installation template
incl. fixing parts, valves and gas stop cock
R ½" with integral thermal safety shut-off
valve
2
Illustration: Gas fired combination boiler connection
*1
Cold and hot water connections for gas
fired boilers with DHW cylinder.
Key to symbols
ATR Drain funnel connection R 1"
E Drain
GA Gas connection R ½"
HR Heating return G ¾"
HV Heating flow G ¾"
OKFF Top edge finished floor
52
Additional requirements when
connecting a DHW cylinder
Connection set for DHW cylinders
A B C
SVL/WW
ATR
SRL/KW
E
HR
GA
HV
Only for gas fired combination boilers
KW Cold water G ½"
WW Hot water G ½"
Only for gas fired boilers
SRL Cylinder return G ¾"
SVL Cylinder flow G ¾"
*1
Obligatory in conjunction with DHW
cylinders installed below the boiler.
Otherwise, recommendation only.
Note
Ensure a clearance of 700 mm in front of
Vitodens or the DHW cylinder for
maintenance purposes.
Maintenance spaces to the l.h. or r.h. side
of Vitodens are not required.
A Installation template
B Vitodens
C Area for electrical supply cables.
Allow all cables to protrude
approx. 1 200 mm from the wall.
VITODENS