Rear Wall Vent Application - Vermont Castings CDVR33n Installation And Operating Instructions Manual

CDVSC7 & CDV7 Series Gas Fireplace

ReaR wall VenT applICaTIon

When installed as a rear vent unit this appliance may be
vented directly to a termination located on the rear wall
behind the appliance.
•
Only Vermont Castings Group approved venting com-
ponents are approved to be used in these applications
(Refer to 'Venting Components' listed for different in-
stallation requirements).
•
The maximum horizontal distance between the rear of
the appliance (or end of the transition elbow in a cor-
ner application) and the outside face of the rear wall is
0" (508 mm). Figure 14
•
Only one 45° elbow is allowed in these installations.
•
Minimum clearances between vent pipe and combus-
tible materials are as follows:
Top - 3" (76 mm)
- except at outside wall 1" (5 mm)
Sides - 1" (5 mm)
Bottom - 1" (5 mm)
Rear Vent Top View
20"
(508 mm)
Max.
Figure 15 -
Rear Vent Application, No Elbows
ReaR wall VenT InSTallaTIon - TwIST
FP1188
loCk pIpe
rear wall install
Step 1
Locate and cut the vent opening in the wall.
For combustible walls first frame in opening. Figure 16
noTe: When using flex vent, the opening will have to be
measured according to the 1" (5 mm) rise in 4" (610
mm) vertical run.
Combustible walls: Cut a 9B\,"H x 9B\," W (44 x 44
mm) hole through the exterior wall and frame as shown.
Figure 16
noncombustible walls: Hole opening should be 7Z\x"
(191 mm) diameter.
18
9B\,"
(44 mm)
Min.
Figure 16 -
Locate vent opening on wall
20"
Step 2
(508 mm)
Max.
Secure firestop to the inside frame, center in the 9B\," x
9B\," vent opening.
Step 3
Measure the horizontal length requirement for the venting
including a " (51 mm) overlap, i.e. from the elbow to the
outside wall face plus " (51 mm). Figure 15
Step 4
Install the 4" (10 mm) vent to the appliance collar and
FP1188
secure with 3 sheet metal screws. Install the 7" (178 mm)
vent pipe to the appliance collar and secure with 3 sheet
metal screws. It is not necessary to seal this connection.
If a 45° elbow is being used attach the elbow to the appli-
ance in the same manner then attach the venting to the
elbow.
Step 5
Guide the venting through the vent hole as you place the
appliance in its installed position. Guide the 4" (10 mm)
and 7" (178 mm) collar of the vent termination into the
outer ends of the venting. Do not force the termination. If
the vent pipes do not align with the termination, remove
and realign the venting at the appliance flue collars. Fig-
ure 17. Attach the termination to the wall as outlined in the
instruction sheet supplied with the termination.
VenTInG InSTallaTIon
Vent opening for Combustible walls
9B\,"
(44 mm) Min.
Fireplace Hearth
opening for noncombustible wall
7Z\x"
(190 mm)
Fireplace Hearth
VO584-100
Vent Opening
2/99 djt
It is critical that there is no downward slope
away from the appliance when connecting
the vent or elbow.
Framing Detail
FP93
69D3011