4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Massachusetts And New York City, NY Re-
quirements
These appliances are approved for installation in
the following USA locations listed as follows:
Massachusetts:
These fireplaces are approved for installation in
the US state of Massachusetts 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.
• Install this appliance in accordance with Mas-
sachusetts Rules and Regulations 248 C.M.R.
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:
These fireplaces are approved for installation in
New York City in the US state of New York.
Figure 2
Dexen Electronic Gas Valve
Pilot Stage
Terminal
Pressure-Tap
(Inlet)
Pilot Gas
Outlet
Supply
Gas
Inlet
Pressure-Tap
(Manifold)
Burner Stage
Terminal
Ground
(TP)
PILOT
OUT
VENT
LO
TH TP
TH
TP
HI
IN
IN
Regulator
Mounting Screw
COLD CLIMATE INSULATION
For cold climate installations, seal all cracks
around the appliance with noncombustible
material and wherever cold air could enter
the room. It is especially important to insulate
outside chase cavity between studs and under
floor on which the appliance rests, if floor is
above ground level. Gas line holes and other
openings should be caulked or stuffed with
unfaced fiberglass insulation.
If the fireplace is being installed on a cement
slab, in cold climates, a sheet of plywood or other
raised platform can be placed underneath to
prevent conducting cold up into the room. It also
helps to sheetrock inside surfaces and tape for
maximum air tightness and caulk firestops.
Figure 3
-
Typical Locations
LOCATION
In selecting the location, the aesthetic and
functional use of the appliance are primary
concerns. However, vent system routing to
the exterior and access to the fuel supply are
also important.
Due to high temperatures,
the appliance should be located out of traffic
and away from furniture and draperies, etc.
(
Figure 3
)
. The location should also be free
of electrical, plumbing or other heating/air
conditioning ducting.
These direct vent appliances are uniquely
suited for installations requiring a utility shelf
positioned directly above the fireplace. Utility
shelves like these are commonly used for locat-
ing television sets and decorative plants.
N
O
IT
A
CI
L
P
P
A
T
N
E
V
P
O
T
APPLICATION
TOP VENT
TN
EV
PO
T
NOI
TA
CI
LP
PA
RECESSED
INSTALLATION
TOP VENT
APPLICATION
NOI
TA
CI
LP
PA
TN
EV
PO
T
NOI
TA
CI
LP
PA
TN
EV
PO
T
HORIZONTAL VENT
(Top Vent Application)
VERTICAL VENT
(Top Vent Application)
Note:
When the unit is installed with one
side flush with a wall, the wall on the other
side of the unit must not extend beyond the
front edge of the unit.
Summary of Contents for Merit MLDVT-45NE
Page 29: ...29 NOTES...
