New Buck Corporation 85 - Manual (Page 19)

maintaining clearances to the ceiling as noted in Figure 6. This will give you the center of
the hole for the chimney penetration.
4. After locating the center of the penetration, install the tee box and chimney as per the
chimney manufacturer's specifications.
5. Connect the chimney collar to the tee-box using #24 ga. minimum blued or black steel
connector pipe. (DO NOT USE GALVANIZED PIPE.) Connect each section so the
crimped end faces downward, and secure each section to each other using three (3) sheet
metal screws or rivets.
C. Wall Exit Into Masonry (Using Single Wall Pipe)
1. Before connecting these units to a masonry chimney, determine that the masonry fireplace
wall pass-through connector thimble meets the NFPA-211 Code and local building codes
and is a minimum of 18" from the ceiling. If the connector thimble does not meet
these codes, the pass-through connector must be modified. (See Figure 7.)
F igure 7
Connectors may pass through walls or partitions constructed of combustible material if the
connector is:
(a) Either listed for wall pass-through or is routed through a device listed for wall pass-
through and is installed in accordance with the conditions of the listing.
(b) Selected or fabricated in accordance with the conditions and clearances as stated in
the NFPA-211 Code. Any unexposed metal that is used as part of a wall pass-through
system and is exposed to flue gases shall be constructed of stainless steel or other
equivalent material that will resist corrosion, softening, or cracking from flue gases at
temperatures up to 1800
o F.
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