Boiler Installation
7
Logano G125 BE - Specifications subject to change without notice.
22
7.1.2 Horizontal Venting
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
Î
Chapter
„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 (
Î
Chapter „7.1.2.7 Installation of Galva-
nized Vent Pipe“, page 27).
Venting system: Side wall
Comment
Draft
Combus-
tion air
Max. Vent length
Sealed vent
Positive
Outside air
only
20 ft.
Fig. 15
Aerocowl (AT-4) and Concentric (FT-4) termination
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.
