- Vermont Castings Direct Vent Homeowner's Manual 33XDV, 36XDV, 39XDV
XDV Direct Vent Gas Fireplace
16
10009383
FP1005
Side View Vent Termination
1/25/00 djt
Finished Wall
Vent
Termination
FP1005
Fig. 25 Side view of final unit location.
Rear Wall Vent Installations -
Flex Vent Pipe
Follow Steps 1 and 2 on Page 15.
Step 3
Install the 4” (102 mm) flex vent pipe to the appliance
collars described in “General Information Assembling
Vent Pipes”, Page 11. If the installation requires a 45°
angle, grasp the vent pipe close to the appliance collar
and bend to 45°. DO NOT exceed 45°. (Fig. 26)
Install the 7” vent pipe in the same manner as Step 2.
FP1473
corner flex install
4/04 djt
Termination
Flex Section
Appliance Collars
FP1473
Fig. 26 Grasp the vent pipe close to the collar and bend to
45° angle. Do not exceed 45°.
NOTE: There must be a 1/2” (13 mm) rise in a 12”
(305 mm) length of flex vent.
Step 4
Assemble the flex vent to the collars on the termination
as you did on the appliance.
FP1472
rise in length
4/04 djt
FP1472
Fig. 27 There must be a 1/2” rise per foot length.
Rise
Vertical Sidewall Applications
Since it is very important that the venting system
maintain its balance between the combustion air
intake and the flue gas exhaust, certain limitations
as to vent configurations apply and must be strictly
adhered to.
The Vent Graph shows the relationship between vertical
and horizontal side wall venting and will help to deter-
mine the various dimensions allowable.
Minimum clearance between vent pipes and com-
bustible materials is 1”(25 mm) on top, bottom and
sides unless otherwise noted.
When vent termination exits through foundations less
than 20” below siding outcrop, the vent pipe must
flush up with the siding. It is always best to locate the
fireplace in such a way that minimizes the number of
offsets and horizontal vent length.
The horizontal vent run refers to the total length of vent
pipe from the flue collar of the fireplace to the face of
the outer wall.
Horizontal plane means no vertical rise exists on this
portion of the vent assembly.
When installing the appliance as a rear
vent unit, the 90° or 45° transition elbow
attached directly to the rear of the unit is
NOT INCLUDED in the following criteria
and calculations, and unless specifically
mentioned should be ignored when calcu-
lating venting layouts.