Mendota DT3-PF2-LX Page 21 Installation & Operating Instructions Manual Download

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MINIMUM RISE THROUGH-THE-WALL VENTING

The minimum vertical rise for vent installation through the wall is 16 1/4" from the top of the fireplace to the centerline of
the 90

elbow in installations where only a 6” (or 7”) horizontal vent section is used (refer to chart on PG.16 when using

horizontal sections).  NOTE: We recommend always using the most vertical rise the installation will allow. This maximizes
efficiency and flame appearance.  This is especially true for LP gas installations and for installations at higher  altitudes.
Use "fixed" pipe sections in place of adjustable pipe sections wherever possible.  1000

sealant use is recommended on

inner pipe joints. Always maintain 1" clearances from vent pipe sides and bottom to combustibles, 3" above pipes on hori-
zontal runs and above elbows. Do not fill air spaces with insulation or other material.

For

L.P. gas and High Altitude (above 4,000 ft.),

elbows must be used in place of 90

elbows.

NOTE: This requires 19" minimum rough opening depth (see PG. 15). CAUTION: If 90

elbows must be used, a 2-foot

vertical starter section must be used directly off the top of the fireplace.

THIS FIREPLACE MUST BE INSTALLED BY A QUALIFIED MENDOTA APPROVED SERVICEPERSON.

1. Position fireplace in desired location. See PG. 11 for guidelines on proper vent cap placement on the exterior of

home. Check to determine if wall studs are in the way when venting system is attached. If this is the case, you may
want to adjust the fireplace location.

2. Measure from the top of the fireplace up minimum (see Figure 4: Specifications & Clearances, PG. 164) and mark wall

directly at the center of where the vent pipe will penetrate the wall.

3. Cut and frame a 9" wide x 10" high rectangle opening in the wall. The hole must be positioned so the vent system will

run level or have a ¼" rise AND be perpendicular to the wall. The height of the opening must be located to meet all lo-
cal and national building codes and not allow the termination to be easily blocked or obstructed. If wall being penetrat-
ed is non-combustible material, i.e. masonry block, brick, etc., a 7-inch diameter hole is acceptable.

4. Assemble the components to the fireplace adapter with pipe seams oriented toward the wall or floor -- as much out of

view as possible. Be sure all vent component connections are in their fully twist-locked position and are leak-proof.
Be sure 1000

sealant is used on the inner pipe joints of all pipe sections manufactured by Simpson DuraVent. Ameri-

can Metal pipe joints do not require this sealant.

5. The length of the horizontal piece that fits through the wall will be determined by the thickness of the wall. When in-

stalled, the end of the horizontal piece must be flush with the exterior wall of the home. There MUST be a minimum of
1" air space clearance to combustibles from all vent pieces (3" above horizontal runs and on top of elbows).

A wall thimble must always be used when penetrating combustible wall materials.

NOTE: Combustible wall thickness must be 4" to 8" maximum for the wall thimble. Wall more than 8” thick will require
special protection. Contact Mendota Technical services for assistance.

7. From the exterior of the home, slide the horizontal vent cap over the end of the horizontal pipe and tightly secure the

cap to the wall with screws. Seal with a high quality caulking.

WARNING

: Venting terminal shall never be recessed into wall cladding or siding. Vent Cap must sit on top of siding or

cladding.

IMPORTANT: REFER TO DRAWINGS ON PAGES 14-17 WHILE FOLLOWING THESE INSTRUCTIONS.

NOTE: DO NOT SEPARATE TELESCOPING SECTIONS. THEY MUST BE USED AS COMPLETE ASSEMBLIES.