Vent Clearances And Framing; Pipe Clearances To Combustibles - HEAT GLO PRIMO48 Installation Manual

5

Vent Clearances and Framing

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.
• These clearances to combustible override the
clearances noted in the PVI-SLP-B installation
instructions.
• Clearance above an elbow is 3 inches unless 3 feet
of vertical pipe is installed between the 6 inch factory-
installed pipe section and the first elbow. After 3 feet of
vertical pipe is installed, the clearance is 1-1/2 inches.
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.
• SLP heat shield - designed to be used on a wall 4-3/8 in. to 7-5/8 in.
(111 mm to 194 mm thick).
• If wall thickness is less than 4-3/8 the existing heat shields must be
field trimmed. If wall thickness is greater than 7-5/8 in. a DVP-HSM-B
will be required.
(DVP-SLP Pipe Shown)
3 in. (76 mm) 1-1/2 in. (38 mm) clearance
clearance above elbow
above horizontal pipe sections
1 in. (25 mm)
clearance around
PVI-SLP
vertical sections
Figure 5.1 Horizontal Venting Clearances To Combustible
Materials (PVI-SLP-B)
Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. Z • 3/19
Heat Heat
Shield Shield
1 in. (25 mm)
Wall clearance on bottom
Shield
and sides of horizontal
Firestop
pipe sections
WALL
3 in. (76 mm)
top clearance
clearance above horizontal pipe sections
1 in. (25 mm)
clearance around
vertical sections
1in. (25 mm) clearance below
Figure 5.2 Clearances - Elbow Directly Off Top of Appliance
(PVI-SLP-B/PVLP-SLP)
1-1/2 in. (38mm)
clearance above
an elbow
1 in. (25 mm)
clearance around
vertical sections
Figure 5.3 Clearances - 3 Feet of Vertical Pipe Before an Elbow
(PVI-SLP-B/PVLP-SLP)
1-1/2 in. (38 mm)
horizontal pipe sections
1-1/2 in. (38 mm) clearance
above horizontal pipe sections
1 in. (25 mm)
clearance on bottom
and sides of horizontal
pipe sections
3 ft. min. (914 mm)
25