Boiler Installation
7
Logano G125 BE - Specifications subject to change without notice.
25
7.1.2.4 Sealing of the Vent Pipe
7.1.2.3 General Guidelines for Vent Pipe Installation
Maintain a minimum slope of ¼" per foot toward the ter-
mination on the last horizontal vent pipe section.
z
The wall termination assembly must also slope ¼"
per foot toward the outside to drain possible conden-
sate from the venting system.
z
Slope all other horizontal pipe runs ¼" per foot to-
ward the boiler.
z
Avoid any dips in the piping, particularly when using
the flexible insulated stainless steel oil vent.
WARNING!
DANGER TO LIFE
from toxic flue gases.
The discharge side of the direct vent com-
bustion system operates under positive
pressure.
z
It is of vital importance to seal all joints
and screw penetrations using high tem-
perature silicone (rated for 500°F, G.E.
106 or equivalent) to prevent leakage of
flue gases into the building.
z
The venting system shall never be
pierced under any circumstances after
initial installation. Combustion mea-
surements shall be taken at the exhaust
termination and/or overfire. The
breeching can be pierced for testing as
long as the hole is sealed airtight with a
bolt, washers and high temperature sil-
icone.
WARNING!
DANGER OF LIFE
from toxic flue gases.
z
Never install a barometric damper into
the horizontal direct vent exhaust pip-
ing.
z
Verify that after system installation, all
vent pipe connections have been in-
stalled properly.
z
Check all seams and joints for gas
leaks. Correct as necessary.
z
Have the entire venting system cleaned
and verified annually by a qualified ser-
vice company.
CAUTION!
DANGER OF FIRE
from combustible material or liquid.
z
Establish a safe clearance between
the vent termination and the combusti-
ble material per NFPA 31.
The minimum clearance are:
–
galvanized vent pipe 18",
–
insulated oil vent pipe 1"
The minimum clearances compared to the
boiler
Î
Chapter 6.1, page 15.
