15
Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
Ceiling
Firestop
Straps
Optional
Additional
Support
Joint
Band
(Optional)
Figure 5.4 Secure the Chimney
Figure 5.3 Assembling Chimney Sections
• Support the pipe during construction and check to be
sure inadvertent loading has not dislodged the chimney
section from the fireplace or at any chimney joint.
• Attach a straight chimney section or an offset to the top
of the fireplace.
• Place inner flue to the inside of the chimney section below
it. Place the outer casing outside the outer casing of the
chimney section below it. Refer to Figure 5.3.
NOTICE:
Chimney sections cannot be disassembled
once locked together. Plan ahead!
• Lock chimney sections and/or offsets/returns together by
pushing downward until the top section meets the stop
bead on the lower section.
• Pull on the top section to make sure it is fully engaged
and will not separate.
• You may use #6 or #8 sheet metal screws no longer than
1/2 in. (13 mm) to fasten chimney sections together. Do
NOT penetrate inner flue.
WARNING!
Risk of Fire! You MUST use screws to fas
-
ten offset/returns to chimney sections to keep the chim
-
ney parts from twisting. Failure to do so could cause
fire.
• Fasten offset/returns to chimney sections. Insert the
screws through the predrilled holes. Do NOT penetrate
inner flue.
• Secure chimney returns with hanger straps provided;
fasten to studs or joists.
• Vertical straight runs of chimney must be supported every
35 ft (10.7 m).
B. Assemble Chimney Sections
WARNING! Risk of Fire! DO NOT
install substitute or
damaged chimney components.
• Use only those components described in this manual.
Substitute or damaged chimney components could impair
safe operation and cause overheating and fire.
C. Roof Penetration
• Refer to Figure 5.5.
• Plumb from roof to center of chimney.
• Drive a nail up through roof to mark center of pipe.
• Measure to either side of nail and mark the 14-1/2 in. x
14-1/2 in. (368 mm x 368 mm) opening required.
• Measure opening on the horizontal; actual length may
be larger depending on roof pitch.
• Cut out and frame opening.
• Refer to local codes for roof framing details.
Figure 5.5 Ceiling/Attic Construction
