Viessmann vitodens Technical Manual page 53

Pre-installation with a mounting frame on unfinished walls
Mounting frame with expansion vessel for Vitodens 300 (up to 35 kW)
Key to symbols
E Drain
GA Gas connection R ½"
HR Heating return G ¾"
HV Heating flow G ¾"
OKFF Top edge finished floor
Gas fired combination boilers only:
KW Cold water G ½"
WW Hot water G ½"
Gas fired boilers only:
SRL Cylinder return G ¾"
SVL Cylinder flow G ¾"
*1
Compulsory in conjunction with DHW
cylinders installed below the boiler.
Otherwise, recommendation only.
VITODENS
2.3 Installation on unfinished walls (mounting frame)
A B
C
HV
E
HR
SRL/KW
SVL/WW
GA
A Mounting frame Vitodens 300
B Boiler top edge
C Area for electrical supply cables
Allow all cables to protrude
approx. 1 200 mm from the wall.
Mounting frame
With diaphragm expansion vessel
(capacity 11 litres), valves, fixing parts
and gas angle valve G ¾" incl. thermal
safety shut-off valve
H for gas fired combination boiler
for installation on finished walls
with solder fittings
with compression fittings
for installation on unfinished walls
H for gas fired boiler
for installation on finished walls
with solder fittings
with compression fittings
for installation on unfinished walls
All valves are located under the boiler
cover.
Please note
Ensure a clearance of 700 mm in front of
Vitodens 300 or the DHW cylinder for
maintenance purposes.
Maintenance spaces to the l.h. or r.h. side
of Vitodens 300 are not required.
The mounting frame must not be
plastered over.
300
2
53