Rear Vent Applications & Installation; Rear Wall Vent Application - Monessen Hearth CDV7 Installation And Operating Instructions Manual

VenTInG InSTallaTIon

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 MHSC venting components are approved to be
used in these applications (Refer to 'Venting Compo-
nents' listed for different installation 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)
20"
(508 mm)
Max.
Figure 15 -
Rear Vent Application, No Elbows
FP2292
ReaR wall VenT InSTallaTIon - TwIST
rear vent top vu
loCK pIpe
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.
69D3011
Figure 16 -
Locate vent opening on wall
Rear Vent Top
Step 2
View
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
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.
CDVSC7 & CDV7 Series Gas Fireplace
Vent opening for Combustible walls
9B\,"
(44 mm) Min.
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
19