Boiler Installation
7
Logano G125 BE - Specifications subject to change without notice.
27
7.1.2.7 Installation of Galvanized Vent Pipe
z
Apply a ¼" wide bead of high temperature silicone
(500°F rated silicone, G.E. 106 or equivalent) all
around the boiler vent connection (breech) 1" from
the end (
Î
Fig. 19, page 26).
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Install 5" to 4" reducer on boiler vent connection. Se-
cure properly with a clamp.
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The maximum length of the direct vent system is 20
ft. of linear pipe plus a maximum of 3 x 90º elbows.
With 4 elbows the maximum pipe length is 10 ft. Use
high temperature silicone to seal any joints, screw
penetrations, or combustion test holes, as well as
seal at each pipe connection and all joints on adjust-
able 90º elbows.
WARNING!
HEALTH DANGER
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When using galvanized vent pipe a
proper protection (e.g. screen) at the
wall termination has to be installed. Fol-
low also local codes.
NOTICE
Once the entire venting system is in-
stalled, make sure all joints are secure
(
Î
as well as Chapter „7.1.2.4 Sealing of
the Vent Pipe“, page 25).
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.
WARNING!
DANGER TO LIFE
from toxic flue gases.
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All seams and joints of the exhaust
venting must be inspected for flue gas
leaks.
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Have the entire venting system cleaned
and inspected annually by a qualified
service company.
CAUTION!
BOILER DAMAGE
from condensation.
When using galvanized vent pipe the flue
gas temperature at the boiler breech must
exceed 300°F in order to avoid condensa-
tion. If less than 300°F are measured, the
flue gas temperature will have to be raised
by removal of 2 or more baffles
(
Î
Chapter 8.8, page 42).
This notice is not applicable if stainless
steel vent pipe is being used instead of gal-
vanized pipe.
