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Manafacture: Lennox International Inc. File size: 2.39 mb File name: Language of manual:

REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS These fi replaces 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 fi tter licensed in the Commonwealth of Massachusetts. • The fl exible gas line connector used shall not exceed 36 in. (92 cm) in length. • The individual manual shut-off must be a T-handle type valve. COLD CLIMATE INSULATION For cold climate installations, seal all cracks around your 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 fl oor on which appliance rests, if fl oor is above ground level. Gas line holes and other openings should be caulked or stuffed with unfaced fi berglass insulation. If the fi replace is being installed on a cement slab in cold climates, a sheet of plywood or other raised platform can be placed underneath to prevent conduction of cold transferring to the fi replace and into the room. It also helps to sheetrock inside surfaces and tape for maximum air tightness and caulk fi restops. MANUFACTURED HOUSING B-Vent Fireplaces are not approved for use in OEM or aftermarket manufactured housing built to HUD standards. HI LOWHTPTHTPTPILOT PILOTON itOFF IN OUT HI/LO Variable Flame HeightAdjustment Figure 1: SIT Millivolt Gas Valve Manifold Pressure Tap Inlet Pressure Tap Pilot Adjustment Screw Main Gas Control Knob OFF/PILOT/ON Orange Wire (from DFC Wire Harness) Main Gas Inlet 3/8 in. NPT Green Wire (from DFC Wire Harness) Inlet (IN) Test Port Manifold (OUT) Test Port Figure 2: SIT Electronic Gas Valve Hi/Lo Flame Control Knob Yellow Ground Wire (from DFC Wire Harness) Model Series Nat.Gas drill size (inches) Propane drill size (inches) MPB33 #47 (.0785") * 99K74 • (.048")* 99K78 • MPB35 #44 (.086") * 60J80 • #55 (.052") * 19L52 • MPB40 #38 (.102") * 99K76 • (.0625") * 21L01 • MPB45 #36 (.104") * 24M10 • #52 (.0635") * 37G00 • * Standard size installed at factory• Part /Cat. Number Table 4: Burner Orifi ce Sizes Elevation 0-4500 feet (0-1372 meters) LENNOX HEARTH PRODUCTS • MERIT PLUS® B-VENT GAS FIREPLACES (MPB33/35/40/45) • INSTALLATION INSTRUCTIONS 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 traffi c and away from furniture and draperies (Figure 3). En raison des temperatures elevees, l’appareil devrait etre installe dans un endroit ou il y a peu de circulation et loin du mobilier et des tentures (Figure 3). The location should also be free of electrical, plumbing or other heating/air conditioning ducting. Be aware that this is a heat producing appliance. Objects...

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