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Boiler Connections
Preparing for Installation
22
Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Condensate connection
The Vitodens 222-F B2TB 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. (25 mm)
diameter.
Use CPVC, PVC or other material approved by codes
Air gap
r ga
listed below.
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 222-F B2TB
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. Pull the condensate hose far out of the
boiler that no unnecessary bends are created inside
the boiler. Check tightness of siphon connection A.
IMPORTANT
As shipped, the flexible discharge tubing B will be found
to be pushed up inside the boiler housing. Ensure the
condensate drain pipe is pulled down and positioned to
allow the condensate to properly drain.
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.
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