Viessmann vitodens Technical Manual page 55

Gas fired condensing boiler
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Pre-installation on unfinished walls Vitodens 333
With connection set (part no. 7179 419)
for gas, primary and secondary
connection of on-site pipes/lines from
below
comprising:
H 2 ball shut-off valves (G ¾") with air
vent valve, heating water
H Gas tap R ½" with integral thermal
safety shut-off valve
H Filling tap
H Wall mounting bracket
H Flexible connection pipes, heating
water and DHW plus gas
H Drain outlet kit with drain pipes from
the safety valves
KW HV
GA
HR
WW
Z2
243
180
470
208
C
KOA
Z1
200
Key to symbols
GA
Gas connection G ¾"
HR
Heating return G ¾"
HV
Heating flow G ¾"
KOA Condensate drain (funnel siphon)
OKFF Top edge finished floor
KW
Cold water G c"
WW Hot water G c"
Z 1
DHW circulation G 1" (without DHW
circulation pump connection set)
Z 2
DHW circulation G ¾" (with DHW
circulation pump connection set)
VITODENS
Note
Ensure a clearance of 700 mm in front of
Vitodens is maintained for service work.
Maintenance clearance to the l.h. or r.h.
side of Vitodens are not required.
D
A
B
OKFF
A Connection set
B Vitodens 333 (external dimensions)
C Area for electrical supply cables.
Allow all cables to protrude approx.
2 000 mm from the wall.
D Safety assembly to DIN 1988, DN 15,
as separate accessory
E DHW circulation connection with
DHW circulation pump (separate
accessory)
2.3 Installation on unfinished walls
E
A
333
2
55

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