Lennox Hearth LMDV-33 Series fireplace FRAMING specifications, Proper Sizing of Gas Line, Natural

fireplace FRAMING specifications

Note-

Venting requirments for rear vent applications in corner installations -

• The horizontal vent length "a" to "b" must not exceed 28 inches (711 mm).

LMDVT-3328 and LMDVR-3328 Models -

Dimension A to F occur when one 45 degree elbow is connected directly to the appliance collar.

LMDVT-3530 and LMDVR-4035 Models -

Dimension D and F occur when one 45 degree elbow is connected directly to the appliance collar.

Model No.			A	B	C		D	E		F
LMDVT-3328	in.	33	1/8	48 1/2	34 5/16	17	3/16	241/4		5
LMDVR-3328	mm	841		1232	872	437		616	127
LMDV-3530	in.	35	1/8	57 1/2	40 5/8	19	3/16	28 3/4	6	1/8
	mm	892		1461	1032	487		730	156
LMDV-4035	in.	40	1/8	6 13/16	43 11/32	19	3/16	30 11/16	7	7/8
	mm	1019		1554	1101	487		779	200

b

LMDV and LMDVR units		F
		7 1/4 (184)
LMDV and LMDVT units
Inches
(millimeters)	C	E

D

a

A

B

Back wall of chase/enclosure (including any finishing materials)

Figure 15 - Corner Framing with Square Termination (SV4.5HT-2)

Proper Sizing of Gas Line

Properly size and route the gas supply line from the supply regulator to the area where the appliance is to be installed per require- ments outlined in the National Fuel Gas Code, NFPA 54 - latest edition (USA) or B149 - latest edition (Canada).

Never use galvanized or plastic pipe. Refer to Table 9 for proper sizing of the gas sup- ply line, if black iron pipe is being used. Gas lines must be routed, constructed and made of materials that are in strict accordance with local codes and regulations. We recommend that a qualified individual such as a plumber or gas fitter be hired to correctly size and route the gas supply line to the appliance. Installing a gas supply line from the fuel supply to the appliance involves numerous considerations of materials, protection, sizing, locations, controls, pressure, sediment, and more. Certainly no one unfamiliar and unqualified should attempt sizing or installing gas piping.

Schedule 40

Black Iron Pipe

Inside Diameter (Inches)

Schedule 40 Pipe	Natural	Propane
Length (feet)	Gas	Gas
0-10	1/2	3/8
10-40	1/2	1/2
40-100	1/2	1/2
100-150	3/4	1/2
150-200	3/4	1/2

Table 9

Notes:

•All appliances are factory-equipped with a flexible gas line connector and 1/2 inch shutoff valve (see Figure 48 on Page 24 ).

•See Massachusetts Requirements on Page 4 for additional requirements for installations in the state of Massachusetts in the USA.

•The gas supply line should Not be connected to the appliance until Step 6 (Page 24 ).

•A pipe joint compound rated for gas should be used on the threaded joints. Ensure propane resistant compounds are used in propane applications. Be very careful that the pipe compound does not get inside the pipe.

•It is recommended to install a sediment trap in the supply line as close as possible to the appliance (see Figure 48 ). Appliances using Propane should have a sediment trap at the base of the tank.

•Check with local building official for local code requirements(i.e.arebelowgradepenetrations of the gas line allowed?, etc).

IMPORTANT: If propane is used, be aware that if tank size is too small (i.e. under 100-lbs, if this is the only gas appliance in the dwelling. Ref. NPFA 58), there may be loss of pressure, resulting in insufficient fuel delivery (which can result in sooting, severe delayed ignition or other malfunctions). Any damage resulting from an improper installation, such as this, is not covered under the limited warranty.

10

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.