Oil Furnace L85 Series Installation Manual

507148-01 Issue 1406 Page 5 of 13
Vertical Venting
1. Local building codes may have more stringent
installation requirements and should be consulted
before installation of the unit.
2. The ue pipe should be as short as possible to do the
job.
3. The ue pipe should not be smaller than the outlet
diameter of the ue outlet of the furnace.
4. Single wall ue pipe should not run outside or through
any unconditioned space.
5. The chimney should terminate 2’ above the highest
peak of a peaked roof, and 3’ higher than a at roof.
6. The ue pipe must not pass through a oor or ceiling.
Clearances to single wall ue pipe should be no less
than specied in Table 1.
7. The ue pipe may pass through a wall where provisions
have been made for a thimble as specied in the
Standards of the National Board of Fire Underwriters
(see Figure 2).
Figure 2. Wall Thimble
Thimble
Flue Pipe
CombustibleWall
8. The ue pipe should slope upward toward the chimney
on a horizontal run of at least 1/4” per foot and should
be supported by something other than the furnace
(see Figure 3 and Figure 4).
9. Extend the ue pipe into the chimney so that it is ush
with the inside of the ue liner. Seal the joint between
the pipe and the liner.
10. The furnace shall be connected to a factory-built
chimney or vent complying with a recognized standard,
or a masonry or concrete chimney lined with a lining
material acceptable to the authority having jurisdiction.
11. When two or more appliances vent into a common
ue, the area of the common ue should not be less
than the area of the largest ue or vent connection
plus 50% of the areas of the additional vents or ue
connections. The chimney must be able to su󰀩ciently
vent all appliances operating at the same time.
12. The ue pipe shall not be connected to a chimney ue
serving a solid fuel appliance or any mechanical draft
system.
13. All unused chimney openings should be closed.
Figure 3. Factory-Built Chimney
Rear Flue
Barometric Control
(in either location)*
Factory-Built
Chimney
Drain for
Condensate
Factory-Built
Chimney
Barometric Control
(in either location)*
Drain for
Condensate
* Barometric control may be installed in either the vertical or
horizontal section of the ue pipe within 18” of the ue outlet of
the furnace.
Front Flue
14. All vent pipe run through unconditioned areas or
outside shall be constructed of factory-built chimney
sections (see Figure 3).
15. Where condensation of ue gases is apparent, the vent
shall be constructed to prevent the condensation from
entering the ue transition box opening. Provisions
shall be made to drain o󰀨 the condensate (see Figure
3).
16. Vent connectors serving this appliance shall not be
connected into any portion of a mechanical draft
system operating under positive pressure.
17. Keep the area around the vent terminal free of snow,
ice, and debris.