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
Useonlyapprovedventingcomponents. 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.
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.
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.
On
(OUTSIDE of | Gasket Vent Seal Plate | |
Appliance) | ||
Cabinet Top | Securing | |
Screws | ||
| ||
| Top Vent | |
Firebox Top |
| |
Vent Cover Plate | Cover Plate | |
| Securing Screws |
(Inside of Appliance)
CROSS SECTION
Figure 16
On
Rear Vent Seal & Cover Plate Removal
When Using The Rear Vent
Cover Plate | Vent Seal Plate | |
Securing Screws | ||
| ||
Gasket | ||
(INSIDE of |
| |
Appliance) | Securing | |
| ||
Rear Vent | Screws | |
| ||
Lintel |
| |
Lintel | Cabinet | |
Securing | Back | |
Screws | (OUTSIDE of | |
CROSS SECTION | ||
Appliance) | ||
Figure 17
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
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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
Restrictor
Inner
Fireplace
Collar Appliance Top
Vent Outlet
Figure 18
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
If needed, install the restrictor orientated as shown, either from inside or outside the unit, in the inner fireplace collar
Inner Fireplace | Appliance Rear | |
Collar | ||
Vent Outlet | ||
| ||
| Restrictor |
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.
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