Desa VH Series Stove"VICTOR HEARTH" Owner's Operation And Installation Manual page 12

ventinG instaLLation
Continued
TYPE B-VENT INSTALLATION
(Listed B-0 or Greater)
Before beginning installation be sure that the
overall height and gas vent size conform to
building code requirements. Gas vents ex-
tending through pitched roofs can extend a
minimum height of at least 600 mm (2') higher
than any obstruction within 3m (10'). Gas vents
extending through flat roofs are required to
extend at least 600 mm (2') above the roof and
at least 600 mm (2') higher than any portion
of the building or adjoining building within 3m
(10') of the gas vent.
• In absence of local codes, follow Section
7.0 of the current National Fuel Gas Code
NFPA 54/ANSI Z223.1 and the Natural
Gas Installation Code - vent sizings for
Category I systems using double wall B-1
vent pipe.
• Where the gas vent extends through acces-
sible spaces, it should be enclosed to avoid
personal contact and damage. Enclosure
walls should have a fire rating equal to or
greater than the floors through which the
gas vent passes except in single or two-
family dwellings.
• Situate the gas vent in the structure so that
it can be installed without cutting joists, sills,
plates, or major load bearing partitions or
members. It is also important to locate the
base of the gas vent as near as possible
to the heating appliance.
• This burner system must be properly con-
nected to a venting system. This burner
system is equipped with a vent safety
shutoff system.
• Use only vents labeled "FOR EXTERIOR
USE" above the roofline.
• Consult the authority having jurisdiction to
select the correct gas vent diameter. Avoid
using a larger than necessary diameter.
12
Storm Collar
Firestop
Spacer
Enclosure
Wall
Gas Vent
Length
Support
Plate
Adjustable
Length
Figure 20 - Typical B-Vent Installation
INSTALLATION OF LISTED B-1
VENT
should only be made by quali-
fied persons who are familiar
with the safety procedures
required for the installation of
the product, who are equipped
with the proper tools and test-
ing instruments, and who have
achieved proper certification of
licensing. Installations made by
unqualified persons can result
in the risk of injury or electrical
shock which can be serious or
even fatal.
www.desatech.com
Round
Top
Flashing
Keep Electrical
Wires and
Building
Insulation Away
from Gas Vent
and Out of the
Required Air
Space
25mm (1")
Clearance to
Combustibles
WARNING: Installation
Roof
Support
25mm (1")
Clearance to
Combustible
Material
112127-01C