Mendota CHELSEA M-27, Installation And Operating Instructions Manual

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85-03-01120 M27 Page 60
ZERO RISE HORIZONTAL TERMINATION
The M27 Fireplace must be installed by a qualified Mendota approved serviceperson.
A Maximum Horizontal Run allowed is 48 inches if a 90-degree
elbow is connected directly to this fireplace’s flue starter collar.
When a 90-degree elbow is connected directly to this fireplace,
the horizontal centerline of the 90
º
elbow will be 44-9/16 ” inches
up from the floor level of this Fireplace.
See, MASTER VENTING CHART and Figures, below.
Use "fixed" pipe sections in place of adjustable pipe sections
wherever possible.
Always maintain 1" clearance from vent pipe sides and bottom to
combustibles, 3" clearance on top of pipe on horizontal runs and
on top of horizontal discharge elbows. Do not fill air spaces with
insulation or other material.
1. Position fireplace in desired location. See 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 or modify the exterior wall framing to allow
the vent system to penetrate the wall.
2. Measure from the floor level of the fireplace up 44-9/16 ”
inches [add ¼” rise for every foot of horizontal run] and mark wall directly at the center of wh ere the vent pipe will penetrate
the exterior wall.
3. Cut and frame a 9-1/4" wide x 10-1/4" high opening in the wall for use with a mandatory wall thimble. The hole must be
positioned so the vent system will run level or have a ¼" rise per foot of run AND be perpendicular to the wall. The height of
the opening must be located to meet all local and national building codes. Do not allow the termination to be easily blocked or
obstructed. If wall being penetrated is non-combustible material, i.e. masonry block, brick, etc., a 9-inch diameter hole is
acceptable.
4. Attach the 90-degree elbow to the fireplace starter adapter. Attach a horizontal section to the 90-degree elbow. Be sure all
vent component connections are in their fully twist-locked position and are leak-
proof. The length of the horizontal piece that fits through the wall will be
determined by the location of the fireplace relative to the wall. For a normal
installation where this fireplace is installed directly against an exterior wall
constructed using 2x4 lumber or 2x6 lumber, only a 6” horizontal section is required.
There MUST be a minimum of 1" air space clearance to combustibles from all vent
components (3" above horizontal runs and horizontal discharge elbows).
5. A wall thimble must always be used when penetrating any combustible wall
materials.
6. 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.
NOTE: Combustible wall thickness must be 4" to 8" maximum for wall thimble
application.
NOTE: Vent Cap should not be recessed into wall or siding.