Viessmann Vitodens 111-W, Инструкция по установке и обслуживанию

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9
Safety assembly to DIN 1988 and EN 806 at the cold water connection
C
F
B
D E GH D
K
D H L M D N K
A
O
Fig. 2
A
Safety assembly (accessories for connection sets
for unfinished walls)
B
Safety valve
C
Visible discharge pipe outlet point (tundish)
D
Shut-off valve
E
Flow regulating valve (installation recommended)
F Pressure gauge connection
G
Non-return valve
H
Drain
K
Cold water
L
Drinking water filter
M Pressure reducer to DIN 1988-2, Dec. 1988 issue
N
Non-return valve/pipe separator
O
Cold water connection at connection set (accesso-
ries)
Combination inlet group
Combines elements
A
,
M
and
N
■ Pressure reducing valve
This must be installed near the cylinder. The cold
water supply to any mixer taps/showers must be
taken from the cold water tapping of this valve to
ensure balanced hot and cold pressures. This valve
is factory set to ensure the correct operating pres-
sure.
■ Non-return valve
This is integral to the pressure-reducing valve to pre-
vent the backflow of hot water towards cold water
draw-off points.
■ Cold water expansion relief valve
This safety device is preset at the factory and will
relieve excess cold water pressure resulting from a
fault condition.
Preparing for installation
Preparing for boiler installation
(cont.)
5697789
Installation