Condensate Connection; Fill Siphon With Water - Viessmann Vitodens 100-W B1HA 26Vitodens 100-W B1HA 35Vitodens 100-W B1KA 35 Installation And Service Instructions Manual

Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
Boiler Connections
Legend
A Flexible discharge tubing
B Discharge tubing
(continued)

Condensate connection

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 in. 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.
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 siphon with water

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.
Connections
21