26
Heatilator • Caliber CNXT Series • 4047-132 Rev P • 11/07
WA
LL
No combustible
framing to be
located within
shaded area.
2 x 4 or
2 x 6
header
Drywall
3 in.
(76 mm)
1 in. (25 mm)
1/2 in. (13 mm)
minimum to
perpendicular
wall.
Air space clearances
to bottom and sides
of horizontal pipe
must be at least
1 in. (25 mm)
B. Wall Penetration Framing
• Wherever a combustible wall is penetrated, the hole must
be framed with a wall shield
fi
restop. This shield maintains
minimum clearances and restricts cold air in
fi
ltration.
• If the wall being penetrated is of noncombustible materials
(material which will not ignite or burn, or has a UL
fi
re rating
of zero), a 9 in. (229 mm) diameter hole is acceptable.
• Whenever a wall is penetrated the wall shield
fi
restop
is only required on one side and no heat shield is
necessary.
• If your local inspector requires the wall shield
fi
restop on
both sides of the wall, then both wall shield
fi
restops must
have a heat shield attached to them.
A. Pipe Clearances to Combustibles
Fire Risk
Explosion Risk
Maintain vent clearance to combustibles as
speci
fi
ed.
• Do not pack air space with insulation or
other materials.
Failure to keep insulation or other materials
away from vent pipe may cause
fi
re.
WARNING
Figure 6.1 Pipe Clearances
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance
bottom & sides
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
Note: Heat shields MUST overlap by a minimum of 1-1/2 in.
(38 mm).
The heat shield is designed to be used on a wall
4 in. to 7-1/4 in. (102 mm to 184 mm) thick.
If wall thickness
is less than 4 in. (102 mm) the existing heat shields must be
field trimmed. If wall thickness is greater than 7-1/4 in. (184
mm) a DVP-HSM-B will be required.
Figure 6.2 Horizontal Venting Clearances to Combustible Materials
27-1/4 in.
(692 mm)*
Framing should be
constructed of 2 X 4
lumber or heavier.
The center of the
framing hole is
1 in. (25mm) above
the center of the
horizontal vent pipe.
42-1/4 in.
(1073 mm)*
6ENTFRAMINGHOLE
$/./40!#+7)4(
).35,!4)/./2/4(%2
-!4%2)!,
* Measured to center
of pipe.
10 in.
12 in.
Figure 6.3 Exterior Wall Hole
6
6
Vent Clearances and Framing
Содержание CNXT4236IH CNXT4842IH
Страница 88: ...88 Heatilator Caliber CNXT Series 4047 132 Rev P 11 07 This page intentionally left blank...
Страница 89: ...Heatilator Caliber CNXT Series 4047 132 Rev P 11 07 89 This page intentionally left blank...
Страница 90: ...90 Heatilator Caliber CNXT Series 4047 132 Rev P 11 07 This page intentionally left blank...