Before Set-Up; Minimum Clearances; Recommended Minimum Service Clearances - Viessmann VITODENS 222-F Installation Instructions Manual

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 222-F, B2TA boiler has passed the
zero inches vent clearance to combustibles testing
requirements dictated by the boiler Harmonized
Standard ANSI Z21.13. CSA 4.9.2012 and
therefore is listed for zero clearance to combustibles
when vented with a single-wall UL/ULC certified
special venting system. The zero inches vent
clearance to combustibles for the Vitodens boiler
supercedes the clearance to combustibles listing
that appears on the special venting system label.
The back or side clearance shall be increased if
piping installation is required.
10
(continued)
Vitodens 222-F, B2TA 19 and 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.
The 2" (50 mm) clearance shown is to connect the
discharge pipe on either the left or right side of the boiler
for the pressure relief valve or the DHW tank temperature
and pressure valve.
This reduced clearance is also used in Vitodens multiple
boiler installation system as described in
the multiple boiler installation instructions.
The Vitodens 222-F, B2TA 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 222-F B2TA Venting
System Installation Instructions for details.
Left Right Vent pipe
0 0 0