Domestic Hot Water Connections - Viessmann vitodens 100 Installation Instructions Manual

Connections
(continued)

Domestic hot water connections

WW KW
WW Hot water
KW Cold water
Condensate connections
Connect the pre-installed cold and
hot water connections to the boiler.
Max. operating pressure
(secondary circuit)
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Test pressure
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¨ Caution!
The instantaneous water heater is
designed as a plate-type heat ex
changer with copper components.
Do not use galvanized pipes and fit
10 bar
tings for the hot water distribution
15 bar
system.
In cases where existing systems are
being modernized, the risk of electro
lytic corrosion is minimal as a pro
tective film will have formed in the
pipes.
Please note:
It is not necessary to install safety
equipment to DIN 1988 unless the
mains drinking water supply pres
sure exceeds 10 bar and no pressure
reducing valve is used (as per DIN
4753).
A safety valve must be used if a non-
return valve is installed in the cold
water supply. In addition, the toggle
on the cold water shut-off valve must
be removed. Non-return valves are
used, for example, in pressure re
ducers and combined non-chokable
valves with non-return valve.
1. Install the condensate drain pipe
with a suitable gradient.
2. Discharge the condensate from
the flue system (if drain installed)
together with the condensate from
the boiler into the drainage sys
tem either directly or (if required)
via a neutralizing unit (accessory).
Please note:
A pipe ventilation facility must be
arranged between the siphon trap
and the neutralizing unit.
Boiler
9