Massachusetts Requirements - Lennox Montebello MDLX40IN Installation Instructions Manual

LENNOX HEARTH PRODUCTS • MONTEBELLO
These electronic appliances are remotely
controlled and feature an electronic intermit-
tent pilot ignition system or standing pilot.
External electrical power is required to operate
these units.
These electronic models come standard with a
remotely-modulated gas valve; flame appear-
ance and heat output cannot be controlled at
the gas valve. The BTU Input for these appli-
ances is shown in Table 1.
Input (BTU/HR)
Model No.
Natural Gas
MDLX40IN 32,000 to 50,000
MDLX45IN 38,500 to 60,000
Propane Gas
MDLX40IP 32,000 to 50,000
MDLX45IP 38,500 to 60,000
Table 1
Gas Pressure - All Models
Appliance inlet and manifold gas pressure
requirements are listed in Tables 2 and 3.
Inlet Gas Supply Pressure
Fuel # Minimum
5.5" WC
Natural
(1.37 kPa)
Gas
11.0" WC
Propane
(2.74 kPa)
Table 2
Manifold Gas Supply Pressure
Fuel # Low
Natural 1.6" WC
Gas (.4 kPa)
6.3" WC
Propane
(1.57 kPa)
Table 3
Test gauge connections are provided on the
front of the gas control valve (identified IN for
the inlet and OUT for the manifold side).
Propane tanks are at pressures that will cause
damage to valve components. Verify that the
tanks have step-down regulators to reduce the
pressure to safe levels.
The appliance and its appliance main gas
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas
supply piping system by closing its equipment
shutoff valve during any pressure testing of
the gas supply piping system at test pressures
equal to or less than 1/2 psi (3.5 kPa).
4
®
Orifice Sizes - Sea Level To High Altitude
(All Models)
These appliances are tested and approved
for installation at elevations of 0 - 4500 feet
(0 - 1372 meters) above sea level, using the
standard burner orifice sizes (marked with an
asterisk (*) in Table 4). For elevations above
4500 feet, contact your gas supplier or qualified
service technician.
Deration - At higher elevations, the amount
of BTU fuel value delivered must be reduced
by either:
Input (BTU/Hr) • using gas that has been derated by the gas
company; or
• changing the burner orifice to a smaller size
as regulated by the local authorities having
jurisdiction and by the (USA) National Fuel
Gas Code NFPA 54/ANSI Z223.1 - latest
edition or, in Canada, the CAN/CGA-B149.1
codes - latest edition.
Install the appliance according to the regulations
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA
54 / ANSI Z223.1 - latest edition or , in Canada,
the CAN/CGA-B149.1- latest edition.
NOTE: Flame appearance will diminish 4% per
thousand feet of altitude.
Maximum
10.5" WC
Elevation 0 - 4500 ft ( 0 - 1372 m)
(2.61 kPa)
Model
13.0" WC
(3.23 kPa)
MDLX40
MDLX45
High
Table 4
3.5" WC
(.87 kPa)
Gas Valve Diagram
10.0" WC
The SIT Proflame gas valve is shown in Figure
(2.49 kPa)
1.
(From DFC Wire
Main Gas Inlet
Figure 1 - SIT Proflame Valve
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS
Burner Orifice Sizes
Nat.Gas Propane
drill size (inches) drill size (inches)
0.1405" (#28)* 0.086" (#44)*
• H2286 • H2287
0.154" (#23)* 0.093" (#42)*
• H8808 • H4816
* Standard size installed at factory
• Part /Cat. Number
Green Wire
(From DFC Wire
Harness)
Manifold (Out)
Test Port
Inlet (In) Test Port
Wire
Harness)
3/8" NPT
REQUIREMENTS FOR THE COMMON-
WEALTH OF MASSACHUSETTS
These fireplaces are approved for installation in
the US state of Massachusetts if the following
additional requirements are met:
• Install this appliance in accordance with
Massachusetts Rules and Regulations 248
C.M.R.
• Installation and repair must be done by a
plumber or gas fitter licensed in the Com-
monwealth 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.
Connect GTMS
Wire Harness
Pressure
Regulator
Tower
Yellow Ground Wire
(From DFC Wire
Harness)