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BDV7 Series Direct Vent 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 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
20" (508 mm). Figure 15
•
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" (25 mm)
Sides - 1" (25 mm)
Bottom - 1" (25 mm)
20"
(508 mm)
Max.
Figure 16 -
Rear Vent Application, No Elbows
ReAR WAll VeNt INStAllAtIoN -
FP2292
t- loCK PIPe
rear vent top vu
Step 1
Locate and cut the vent opening in the wall.
For combustible walls first frame in opening. Figure 17
Note: When using flex vent, the opening will have to be
measured according to the 1" (25 mm) rise in 24" (610
mm) vertical run.
Combustible Walls: Cut a 9B\,"H x 9B\," W (244 x 244
mm) hole through the exterior wall and frame as shown.
Figure 17
Noncombustible Walls: Hole opening should be 7Z\x"
(191 mm) diameter.
Step 2
Secure firestop to the inside frame, center in the 9B\," x
9B\," vent opening.
16
Figure 17 -
Locate vent opening on wall.
Rear Vent top
View
Step 3
Measure the horizontal length requirement for the venting
including a 2" (51 mm) overlap, i.e. from the elbow to the
outside wall face plus 2" (51 mm). Figure 16
Step 4
Install the unitized T-lock vent pipe to the appliance collar,
following T-lock directions on Page 14. It is not necessary
FP2292
to seal this connection. If a 45° elbow is being used attach
the elbow to the appliance in the same manner then at-
tach the venting to the elbow.
IMPoRtANt: Pipe can be twisted in either direction.
however, All PIPe MuSt Be RotAteD IN the SAMe
DIReCtIoN.
Securing the joints with sheet metal screws is not re-
quired.
Step 5
Guide the venting through the vent hole as you place the
appliance in its installed position. Guide the 4" (102 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 18. Attach the termination to the wall as outlined in the
instruction sheet supplied with the termination.
VeNtING INStAllAtIoN
Vent opening for Combustible Walls
9B\,"
(244 mm) Min.
9B\,"
(244 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
FP2293
20301836
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