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General Information/Set-up
Mechanical Room
IMPORTANT
Boiler operation in marine environments (damp, salty
coastal areas)
The service life of the boiler's exposed metallic surfaces,
such as the casing and fan housing, is directly influenced
by proximity to damp and salty marine environments.
Before Set-up
Before placing boiler in its installation location, ensure all
necessary accessories are installed.
Minimum Clearances
Note: The Vitodens 200-W, B2HA boiler has passed the
zero inches vent clearance to combustibles testing
requirements dictated by the boiler Harmonized
Standard ANSI Z21.13. CSA 4.9.2007 and
therefore is listed for zero clearance to combustibles
when vented with a single-wall special venting
system (AL-29-4C material) or UL/ULC-listed
CPVC/PPs gas vent material. The zero inches
vent clearance to combustibles for the Vitodens
200-W, B2HA boiler supercedes the clearance to
combustibles listing that appears on the special
venting system label.
10
(continued)
Vitodens 200-W B2HA 19, 28, 35 Installation
In such areas, higher concentration levels of chlorides
from sea spray, coupled with relative humidity, can
lead to degradation of the exposed metallic surfaces
mentioned above. Therefore, it is imperative that boilers
installed in such environments not be installed using direct
vent systems which draw outdoor air for combustion.
Such boilers must be installed using room air dependent
vent systems; i.e. using room air for combustion. The
indoor air will have a much lower relative humidity and,
hence, potential corrosion will be minimized.
CAUTION
The boiler must be installed in such a way that gas
ignition system components are protected from water
(spraying, splashing, etc.) during boiler operation and
service.
Recommended minimum service clearances
For typical Vitodens installations, Viessmann recommends
installing the boiler with the clearances shown in the
illustration on the left.
Note: The 12 in. (305 mm) side clearance specified is
only recommended to be able to view the boiler
certified rating plate, decal and also accommodate
the PRV installation kit.
If the pressure relief valve is rotated 90º facing forward
by using an extension between the tee and the boiler
connection, then this clearance can be reduced to b in.
(12 mm). This b in. (12 mm) clearance is only required
to be able to remove the boiler's front cover and view
the rating plate attached to it, if needed.
This reduced clearance is also used in Vitodens multiple
boiler installation system as described in
the multiple boiler installation instructions.
The Vitodens 200-W, B2HA boiler is approved for closet
and alcove installation with the following clearances to
combustibles.
Table 1 Clearances
Top
Front
Rear
0
0 AL CL
0
AL = Alcove
CL = Closet
See the Vitodens 200-W B2HA Venting
System Installation Instructions for details.
Left
Right
Vent pipe
0
0
0
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