Lennox Hearth Electronic LMDV-3530-CNM - Manual (Page 11)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
11
Figure 18
Figure 19
Select Venting System - Horizontal or Vertical
With the appliance secured in framing, de-
termine vent routing and identify the exterior
termination location. The following sections
describe vertical (roof) and horizontal (exterior
wall) vent applications. Refer to the section
relating to your installation. A list of approved
venting components is shown on Pages 31
and 32.
Installation of Vent Restrictor
A vent restrictor may be needed with this ap-
pliance, install vent restrictor (provided) in the
appliance top flue outlet as shown in
Figure 18
(LMDV-3328, LMDV-3530 and LMDV-4035) or
rear flue outlet as shown in
Figure 19 (LMDV-
3328, LMDV-3530 and LMDV-4035). It is held
in place by friction, only.
Step 3. INSTALL THE VENT SYSTEM
General Information
These instructions should be used as a guide-
line and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and
-B149.2 in Canada.
Use only approved venting components. See
Approved Vent Components on Page 2.
These fireplaces must be vented directly
to the outside.
The vent system may not service multiple
appliances, and must never be connected to a
flue serving a solid fuel burning appliance. The
vent pipe is tested to be run inside an enclosing
wall (such as a chase). There is no requirement
for inspection openings in the enclosing wall at
any of the joints in the vent pipe.
Preparing the Appliance Vent Collar on LMDV-
3530/4035 Series (Combined Top and Rear
Vent) Models.
Each of the unit's two vent collars are sealed
with a cover plate and a seal plate and gasket.
The cover, and seal plate and gasket must be
removed from the vent collar being used. Refer
to Figure 16 for top vent usage and Figure 17
for rear, and the following steps to prepare the
appropriate collar for use.
From the vent collar being used, remove the four
screws securing the vent seal plate and gasket.
Remove and discard the seal plate and gasket.
When the top vent collar is being used, from
inside the firebox, loosen the two screws in the
keyhole slots of the cover plate and remove the
remaining two cover plate securing screws.
Remove and discard the cover plate. Reinstall
and securely tighten all four screws.
Figure 17
On LMDV-3530/4035 Series Models
(Combined Top And Rear Vent Units)
Rear Vent Seal & Cover Plate Removal
When Using The Rear Vent
When the rear vent collar is being used, from
inside the firebox, remove the two screws se-
curing the lintel to the rear wall of the firebox,
then remove the lintel. Remove the four cover
plate securing screws.
Remove and discard the cover plate. Rein-
stall and securely tighten all four cover plate
screws. Re-secure the lintel to the rear wall
of the firebox.
Cover Plate
Securing Screws
Top Vent
Vent Seal Plate
Firebox Top
(Inside of Appliance)
Figure 16
On LMDV-3530/4035 Series Models
(Combined Top And Rear Vent Units)
Top Vent Seal & Cover Plate Removal
When Using The Top Vent
(OUTSIDE of
Appliance)
Securing
Screws
Cabinet Top
CROSS SECTION
Vent Cover Plate
Gasket
Gasket
Lintel
Securing
Screws
Rear Vent
Lintel
(OUTSIDE of
Appliance)
(INSIDE of
Appliance)
CROSS SECTION
Securing
Screws
Vent Seal Plate
Cabinet
Back
Cover Plate
Securing Screws
WARNING
Failure to reinstall and securely
tighten cover plate screws could
result in leakage of flue products
into the living space. Vent cover
plate and vent seal plate must
remain securely installed on
unused vent collar. Failure to do
so could result in leakage of flue
products into living space.
Vent Restrictor Installation
(Top Vent)
A vent restrictor may be needed when vertical-
ly terminating the vent system above the roof
(when using the appliance top vent), install
vent restrictor in the top vent of the fireplace
outlet on LMDV-3530/4035 and LMDVT-3328
series models. If needed, install the restrictor
orientated as shown, either from inside or out-
side the unit,in the inner fireplace collar.
Appliance Top
Vent Outlet
Restrictor
Inner
Fireplace
Collar
VENT RESTRICTOR INSTALLATION
(REAR VENT)
A vent restrictor may be needed when horzontally
terminating the vent system from the rear of the
appliance (when using the appliance rear vent),
install vent restrictor in the rear vent of the fire-
place outlet on LMDV(R)-3328/3530/4035 series
models, in any installation that has a vertical vent
run in excess of three feet (0.914 meters).
If needed, install the restrictor orientated as
shown, either from inside or outside the unit,
in the inner fireplace collar
Inner Fireplace
Collar
Appliance Rear
Vent Outlet
Restrictor