Lennox Hearth LMDV-4035-CNE, LMDVT-3328-CPM Connecting Gas Line, Schematic Representation Only

24

	Plug blower		Green
	into this			White		Ground - Green
	receptacle					Neutral - White
				Black		120 VAC - Black
Blower						Junction Box
						* Wall-mounted
	Ground				Tab	ON/ OFF Blower
						Switch or Variable
	Tab Intact				Broken	Speed Control Switch.
				Red
	Green		Neutral	Hot		J-BOX WIRING FOR
						WALL SWITCH
	Ground
			Side of	Side of
	Screw					BLOWER CONTROL
			Receptacle	Receptacle
View A
J-Box Wiring when			Relay Module C/W FBK-250 only. Plug blower
using unit mounted
			into J-Box receptacle for FBK-100 or FBK-200
relay module.
			application. See View A for J-Box wiring.
BK	VAC
W
	120
G			Optional Blower
Junction Box
			*OFF/ON Switch
Pilot Burner			(Integral with
Assembly			Gas Valve)
			Honeywell
			Electronic
			Gas
			Valve
	Igniter					* Leave the OFF/ON switch, which is
	Connector				GROUND	integral with the gas valve, in the ON
BL				Transformer		position.
						** Optional Control Switches: Wall
BL BK						Switch, Wall Thermostat or Remote
			R	BL		Control Receiver.
				24 V	120 VAC
		BK		Secondary		Notes:
					Primary
						1. If any of the original wire as supplied
						must be replaced, use Type AWM 105°C
			BK	BK = BLACK	BL = BLUE	- 18 gage wire ONLY.
Optional Control Switch						2. 120 VAC, 60 Hz - Less than 3 Amps.
				R = RED	W = WHITE
			W			Caution: label all wires prior to
				G = GREEN
						disconnection when servicing controls.
				Field Wired
						Wiring errors can cause improper and
				Factory		dangerous operation.
				Wired

Schematic Representation Only

Electronic Wiring Diagram (Honeywell) Showing Blower Wiring for Optional FBK-100, FBK-200 & FBK-250 Kits

Figure 47

CAUTION

Ground supply lead must be connected to the wire attached to the green ground screw located on the outlet box. See Figure 47. Failure to do so will result in a potential safety hazard. The appliance must be electrically grounded in accordance with local codes or, in the absence of local codes, the National Electrical Code, ANSI/NFPA 70-latest edition. (In Canada, the current CSA C22-1 Canadian Electrical Code).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Gas		Gas Flex Line Connector
		3/8" NPT x	1/2" x 3/8" Flare
Valve
		Flare Fitting
			Shut-off Valve
*Sediment	3"	3/8" Flex Tubing
Trap	Min		1/2" x 3/8"	Gas
			Reducer	Stub

3/8" Nipple

3/8" Union

3/8" Close Nipple

3/8" Shut-off Valve

*A Sediment Trap is recommended to prevent moisture and debris in gas line from damaging the valve.

Note:The gas supply line must be installed in accor- dance with building codes by a qualified installer approved and/or licensed as requed by the locality. In the Commonwealth of Massachusetts, installa- tion must be performed by a licensed plumber or gas fitter.

Figure 48 - GAS CONNECTION

Step 6. Connecting Gas Line

Make gas line connections. All codes require a shut-off valve mounted in the supply line. Figure

48illustrates two methods for connecting the gas supply. The flex-line method is acceptable in the U.S., however, Canadian requirements vary depending on locality. Installation must be in compliance with local codes.

These appliances are equipped with a gas flex line for use (where permitted) in connecting the appliance to the gas line. A gas flex line is provided to aid in attaching the direct vent appliance to the gas supply. The gas flex line can only be used where local codes permit. See Figure 48 for flex line description. The flex line is rated for both natural gas and propane gas. A manual shut off valve is also provided with the flex line.

The incoming gas line should be piped into the valve compartment and connected (see Figures 48 & 49). The millivolt control valve has a 3/8" (10 mm) NPT thread inlet port. The electronic control valve has a 1/2" (13 mm) NPT thread inlet port and is fitted with a 1/2" x 3/8" (13 mm x 10 mm) NPT fitting.

Secure all joints tightly using appropriate tools and sealing compounds (ensure propane resistant compounds are used in propane applications).

Optional: Seal around the gas line to pre- vent cold air leakage.