10
CAST IRON STOVE AND BURNER SYSTEM
105501
CDVBN(A) AND CDVBP(A)
WARNING: Read all instruc-
tions completely and thoroughly
before attempting installation.
Failure to do so could result in
serious injury, property damage
or loss of life. Operation of im-
properly installed and maintained
venting system could result in
serious injury, property damage
or loss of life.
WARNING: Seal all vent con-
nections. Seal only the outer pipe
connections with high temperature
silicone (600
°
F/316
°
C). Before join-
ing elbows and pipes, apply a bead
of high temperature silicone seal-
ant (GE RTV 106/Loctite RTV 81585)
to the male end of the elbow or
pipe. High temperature silicone
must also be used to re-seal any
connections after maintenance to
venting system.
NOTICE: Failure to follow these
instructions will void the warranty.
INSTALLATION
PRECAUTIONS
Consult local building codes before begin-
ning the installation. The installer must
make sure to select the proper vent system
for installation. Before installing vent kit,
the installer must read this stove and burner
system manual and vent kit instructions.
Only a qualified service person should in-
stall venting system. The installer must fol-
low these safety rules:
• Wear gloves and safety glasses for
protection
• Use extreme caution when using ladders
or when on roof tops
• Be aware of electrical wiring locations
in walls and ceilings
The following actions will void the war-
ranty on your venting system:
• Installation of any damaged venting
component
• Unauthorized modification of the vent-
ing system
VENTING
INSTALLATION
WARNING: This stove with
burner system and vent assembly
must be vented directly to the out-
side. The venting system must
NEVER be attached to a chimney
serving a separate solid fuel burn-
ing appliance. Each gas appliance
must use a separate vent system.
Do not use common vent systems.
WARNING: Horizontal sec-
tions of this vent system require
a minimum clearance of 2" from
the top of the pipe and 1" mini-
mum to the sides and bottom.
Vertical sections of this system
require a minimum of 1" clear-
ance to combustible materials on
all sides of the pipe.
• Installation of any component part not
manufactured or approved by DESA
International
• Installation other than as instructed by
these instructions
INSTALLATION PLANNING
There are two basic types of direct-vent
installation:
• Horizontal Termination
• Vertical Termination
It is important to select the proper length
of vent pipe for the type of termination
you choose. It is also important to note the
wall thickness.
For Horizontal Termination:
Select the
amount of vertical rise desired. The horizon-
tal run of venting must have 1/4" rise for
every 12" of run towards the termination.
NOTICE: Treatment of firestops
and construction of the chase
may vary from building type to
building type. These instructions
are not substitutes for the re-
quirements of local building
codes. You must follow all local
building codes.
Note:
When installing in a chase, you should
insulate the chase as you would the outside
walls of your home. This is especially im-
portant in cold climates. Minimum clear-
ance between vent pipes and combustible
materials such as insulation is 1".
Installing Vent System in a Chase
A chase is a vertical boxlike structure built
to enclose venting that runs along the out-
side of a building. A chase is not required for
such venting.
WARNING: Never run the vent
pipe downward as this may cause
excessive temperatures which
could cause a fire.
You may use one or two 90
°
elbows in this
vent configuration. See Horizontal Termina-
tion Configurations on pages 13 and 14.
For Vertical Termination:
Measure the dis-
tance from the burner system flue outlet to
the ceiling. Add the ceiling thickness, the
vertical rise in an attic or second story, and
allow for sufficient vent height above the
roofline. You may use one or two 90
°
elbows
in this vent configuration. See Vertical Ter-
mination Configurations on pages 16 and 17.
Note:
You may use two 45
°
elbows in place
of a 90
°
elbow. You must follow rise to run
ratios when using 45
°
elbows.
For two-story applications, firestops are re-
quired at each floor level. If an offset is needed
in the attic, additional pipe and elbows will be
required (see Figure 31, page 15).
You may use a chase with a vent termina-
tion with exposed pipe on the exterior of
the house. See Installing Vent System in a
Chase, below.
Your Comfort Glow stove with direct-vent
burner system has been tested for a maxi-
mum 17" wall thickness when using a 60º
elbow directly off the back of the stove. The
maximum horizontal run is 20' with 8' ver-
tical rise (see Installation for Horizontal
Termination, pages 11 and 12). The maxi-
mum vertical run is 30' (see Installation for
Vertical Termination, pages 14 and 15).
It is very important that the venting system
maintain its balance between the combus-
tion air intake and the flue gas exhaust.
Certain limitations apply to vent configura-
tions and must be strictly followed.
