Monessen Hearth CDV7 Installation And Operating Instructions Manual page 20

CDVSC7 & CDV7 Series Gas Fireplace
Finish Wall
Figure 17 -
Side View of Final Unit Location
ReaR wall VenT InSTallaTIonS -
Flex VenT pIpe
Follow Steps 1 and  on Page 19.
Step 3
Install the 4" (10 mm) flex vent pipe to the appliance col-
lars described in "General Information Assembling Vent
Pipes", Page 1. If the installation requires a 45° angle,
grasp the vent pipe close to the appliance collar and bend
to 45°. DO NOT exceed 45°. Figure 18
Install the 7" vent pipe in the same manner as Step .
noTe: There must be a 1/" (13 mm) rise in a 1"
mm) length of flex vent.
Step 4
Assemble the flex vent to the collars on the termination as
you did on the appliance.
Termination
Flex Section
Appliance Collars
Figure 18 -
Grasp the vent pipe close to the collar and
bend to 45° angle. do not exceed 45°.
0
FP1473
Vent
Termination
FP94
FP2294
Side View Vent Termination
1/25/00 djt
(305
FP1473
Figure 19 -
There must be a 1/2" rise per foot length
Top VenT SIDewall applICaTIon
noTe: For all top vent installations where a 90° elbow
is the first pipe piece towards a sidewall termination (up
and out), an open-center ringed flue restrictor must be
installed onto the top edge of the firebox flue adapter. To
create this open-center re-
strictor, twist and break off
the center rib of the supplied
flue restrictor. The installed
part should appear similar
to that show n in Figure 20.
Since it is very im-
portant that the
Figure 20 -
venting system
Top Vent Vertical Sidewall
maintain its balance
Restrictor
between the com-
bustion air intake and the flue gas exhaust, certain
limitations as to vent configurations apply and must
be strictly adhered to.
The Vent Graph, showing the relationship between verti-
cal and horizontal side wall venting, will help to determine
the various dimensions allowable.
Minimum clearance between vent pipes and combus-
tible materials is 3" (76 mm) on top, and 1" (25 mm) on
the bottom and sides unless otherwise noted.
When vent termination exits through foundations less
than 0" (508 mm) below siding outcrop, the vent pipe
must flush up with the siding.
It is best to locate the fireplace in such a way that mini-
mizes 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 (or the top of the
Transition Elbow) to the face of the outer wall.
Horizontal plane means no vertical rise exists on this por-
tion 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 cri-
teria and calculations, and unless specifically men-
tioned should be ignored when calculating venting
layouts.
VenTInG InSTallaTIon
Rise
FP147
FP1472
rise in length
4/04 djt
FP2303
CDV7 rear restrictor
3/09
69D3011
FP303