Condensate Connection; Fill Siphon With Water - Viessmann VITODENS 100-W WB1B Series Installation And Service Instructions Manual

Connections
(continued)

Condensate connection

Fig. 19
Legend
A Flexible discharge tubing
B Discharge tubing

Fill siphon with water

Fig. 20
The Vitodens 100-W boiler comes
with a built-in condensate trap.
An external trap is not required
when connecting the field drain to
flexible discharge tubing. Discharge
tubing (field supplied) must be of 1"
diameter. Use CPVC, PVC or other
material approved by codes listed
below.
In the U.S. the drain pipe and fittings
must conform to ANSI standards and
ASTM D1785 or D2846. CPVC or
PVC cement and primer must conform
to ASTM D2564 or F493. In Canada
use CSA or ULC listed schedule 40
CPVC or PVC drain pipe, fittings and
cement.
If the condensate outlet of the
Vitodens 100-W boiler is lower than
the drain, a condensate pump must
be installed. Select a pump which
is approved for condensing boiler
applications. To avoid condensate
spillage, select a pump with an
overflow switch. The drain connection
must terminate into an open or vented
drain as close to the boiler as possible
to prevent siphoning of the boiler
drain.
Boiler Connections
1. Install the condensate drain pipe
with a suitable gradient.
2. Discharge condensate from the
boiler into the drainage system,
either directly or (if required) via a
neutralization unit (accessory).
Installation Instructions of
Neutralization Unit
(if applicable)
IMPORTANT
Pipe ventilation must take place
between the siphon trap and the
neutralization unit (if applicable).
IMPORTANT
Do not connect the drain pipe from
any other appliance, such as water
softener backwash pipe, to Vitodens
condensate drain pipe.
Fill a minimum of 10 fl.oz. / 0.3 liters
of water into the boiler adaptor.
WARNING
At initial start-up, flue gases may
be emitted from the condensate
drain. Fill the siphon with water
before start-up.
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