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Set-up
Before Set-up
Before placing boiler in its installation location, ensure all
necessary accessories are installed.
Minimum Clearances
Note: The Vitodens 222-F, B2TB boiler has passed the
zero inches vent clearance to combustibles testing
requirements dictated by the boiler Harmonized
Standard ANSI Z21.13. CSA 4.9 (latest edition) 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.
See the Vitodens 222-F B2TB Venting
System Installation Instructions for details.
10
Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
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 service 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 in. (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, B2TB boilers are approved for
closet and alcove installation with the clearances to
combustibles listed.
Minimum clearances to combustibles
Boiler model B2TB
Top
Sides (left and right)
Vent pipe
Front (alcove or closet)
Rear
Floor
19, 68
35, 125
0
0
0
0
0
0
0
0
0
0
combustible
combustible
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