Horizontal Venting - Buderus Logano G125 BE US/CA Installation And Service Instructions Manual

7 Boiler Installation

7.1.2 Horizontal Venting

Venting system: Side wall
Comment Draft
Sealed vent Positive Outside air
The maximum length of the direct vent system is 20 ft. of
linear pipe including 3 x 90° elbows. With 4 elbows the
maximum pipe length is 10 ft.
The following two direct vent terminations are approved
with the G125 BE, and are available for purchase from
your Buderus supplier.
Both exhaust terminations are approved for use with two
different exhaust vent pipe options.
– Option 1:
Flexible, insulated 4" stainless steel oil vent. The in-
sulated oil vent is rated for 1" clearance to combusti-
bles. Wrap the adapters with 3" of ceramic wool
covered with foil tape or sheet metal to maintain 1"
clearance. For installation instructions
„7.1.2.6 Installation of Insulated Flexible Oil Vent",
page 26.
– Option 2:
Standard, 26 gauge galvanized 4" vent pipe. Main-
tain 18" clearance to combustibles with galvanized
vent pipe ( Chapter „7.1.2.7 Installation of Galva-
nized Vent Pipe", page 27).
NOTICE
Horizontal vent systems operate under
positive pressure, which requires all
seams to be sealed. Use high temperature
silicone (500°F rated, G.E. 106 or equiva-
lent) to seal any joints, screw penetrations,
or combustion test holes, and seal at each
pipe connection and all joints on adjust-
able elbows. Refer to 7.1.2.2 for details.
NOTICE
Installations in Canada less than 7 ft.
above ground are required to have a
cage/screen over the termination to pre-
vent injury from touching hot surfaces.
22
Combus- Max. Vent length
tion air
20 ft.
only
Chapter
Fig. 15 Aerocowl (AT-4) and Concentric (FT-4) termination
Logano G125 BE - Specifications subject to change without notice.