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Heatilator • CRAVE4836/ST-B, CRAVE6048/ST-B, CRAVE7260/ST-B, CRAVE8472/ST-B Installation Manual • 2301-973 Rev. H • 5/17
A. Pipe Clearances to Combustibles
WARNING! Risk of Fire!
Maintain air space clearance
to vent.
DO NOT
pack insulation or other combustibles:
• Between ceiling firestops
• Between wall shield firestops
• Around vent system
Failure to keep insulation or other material away from
vent pipe could cause overheating and fire.
5
Vent Clearances and Framing
B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield firestop(s). The wall shield
firestop maintains minimum clearances and prevents cold
air infiltration.
• The opening must be framed on all four sides using the
same size framing materials as those used in the wall
construction.
• DVP pipe - A wall shield firestop must be placed on
each side of an interior wall. A minimum 1-1/2 in. (38
mm) overlap of attached heat shields must be main-
tained.
• See Section 7.F. for information for regarding the instal
-
lation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-com-
bustible materials such as concrete, a hole with diameter
one inch greater than the pipe is acceptable.
Note:
Do not pack the gap with insulation.
Whenever a non-combustible wall is penetrated, the wall
shield firestop is only required on one side and no heat
shield is necessary.
Figure 5.1 Horizontal Venting Clearances To Combustible
Materials
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
•
DVP heat shield
- 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. the existing heat shields must be
field trimmed. If wall thickness is greater than 7-1/4 in. a DVP
-
HSM-B will be required.
(DVP Pipe Shown)
3 in. (76 mm)
top clearance *
1 in. (25 mm)
clearance
bottom & sides
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
Figure 5.2 Wall Penetration
* Shows center of vent framing hole for top venting. The center of the hole is
one (1) in. (25.4 mm) above the center of the horizontal vent pipe.
MODEL
A*
B
CRAVE4836-B
CRAVE4836ST-B
CRAVE6048-B
CRAVE6048ST-B
CRAVE7260-B
CRAVE7260ST-B
64 in.
63 in.
1.63 m
1.60 m
CRAVE8472-B
CRAVE8472ST-B
76 in.
75 in.
1.93 m
1.90 m
A
10 in.
12 in.
B
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL
Note:
Measurements were taken with a 2 ft. vertical section of pipe directly
off the top of appliance.