Lennox Hearth B-MNC0353VDE - Manual (Page 10)

10 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
VENT SEAL CAP
SECURING SCREWS
CROSS SECTION
BAFFLE
SECURING
SCREWS
BAFFLE
REAR VENT
COVER PLATE
SECURING SCREWS
REAR VENT SEAL CAP & COVER PLATE REMOVAL
WHEN USING THE REAR VENT
CABINET BACK
(INSIDE UNIT)
(OUTSIDE UNIT)
VENT RESTRICTOR INSTALLATION
Vent restrictor may be needed when vertically
terminating the vent system above the roof (when
using the appliance top vent), install a vent
restrictor in the top vent of the fireplace outlet.
RESTRICTOR
APPLIANCE TOP
VENT OUTLET
If needed, install the restrictor as shown, either
from inside or outside the unit, in the inner
fireplace collar.
Figure 14
Figure 13
VENT SEAL CAP
FIREBOX TOP
CABINET TOP
SECURING SCREWS
VENT
COVER PLATE
TOP VENT
TOP VENT SEAL CAP & COVER PLATE
REMOVAL WHEN USING THE TOP VENT
VENT COVER PLATE
SECURING SCREW
CROSS SECTION
(INSIDE UNIT)
(OUTSIDE UNIT)
LINTEL
LINTEL
COVER PLATE
PUSH TO BEGIN REMOVAL
PROCESS OF LINTEL COVER PLATE
Figure 12
These fireplaces are designed, tested
and listed for operation and installation
with, and only with, Secure Vent™
Direct
Vent System Components, Secure Flex™
Flexible Vent Components manufactured
by Security Chimneys International and
Z-FLEX™ Model GA Venting Systems listed
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited. These ap-
proved vent system components are la-
beled for identification.
DO NOT use
any other manufacturer's vent compo-
nents with these appliances.
Massachusetts And New York City, NY
Requirements
These appliances are approved for installation
in the following USA locations listed in the
following:
Massachusetts:
Installation of these fireplaces are approved
for installation in the US state of Massachu-
setts if the following additional requirements
are met-
• Installation and repair must be done by a
plumber or gas fitter licensed in the Common-
wealth of Massachusetts.
• The flexible gas line connector used shall not
exceed 36 inches (92 centimeters) in length.
• The individual manual shut-off must be a T-
handle type valve.
Massachusetts Horizontal Vent Requirements
In the Commonwealth of Massachusetts, hori-
zontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
• A hard wired carbon monoxide detector with
an alarm and battery back-up must be installed
on the floor level where the gas fireplace is
installed. The carbon monoxide detector must
comply with NFPA 720, be ANSI/UL 2034
listed and be ISA certified.
• A metal or plastic identification plate must be
permanently mounted to the exterior of the
building at a minimum height of eight (8) feet
above grade and be directly in line with the
horizontal termination. The sign must read, in
print size no less than one-half (1/2) inch in
size, GAS VENT DIRECTLY BELOW. KEEP
CLEAR OF ALL OBSTRUCTIONS.
New York City, NY:
Installation of these fireplaces are approved
for installation in New Your City in the US state
of New York.
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 CAP
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 is being used, from inside
the firebox, remove the two screws securing the
baffle to the rear wall of the firebox, then remove
the baffle. Loosen the two screws in the keyhole
slots of the cover plate and remove the remain-
ing two cover plate securing screws. Remove
and discard the cover plate. Reinstall and se-
curely tighten all four cover plate screws. Re-
secure the baffle to the rear wall of the firebox. 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 enclos-
ing wall (such as a chase). There is no require-
ment for inspection openings in the enclosing
wall at any of the joints in the vent pipe.
Preparing the Appliance Vent Collar
Each of the unit's two vent collars are sealed
with a cover plate and a seal cap. The cover
plate and seal cap must be removed from the
cent collar being used. Refer to
Figure 12 for
top vent usage and Figure 13 for rear, and the
following steps to prepare the appropriate
collar for use.
From the vent collar being used, remove the
screw securing the vent seal cap. Twist the
cap counterclockwise to disengage it from the
vent collar. Remove and discard the seal cap.
When the top vent is being used, remove the
lintel cover plate by pushing it back towards
the rear of the fireplace by its front flange. It
can then be removed by pulling it forward.
Loosen the two screws in the keyhole slots of
the vent cover plate and remove the remaining
two vent cover plate securing screws. Re-
move and discard the vent cover plate. Rein-
stall and securely tighten all four cover plate
screws. Reinstall the lintel cover plate.