Lennox Hearth VIN Gas Line Installation, Gas Pressure Requirements, LP and Natural Gas Supplies

Gas Line Installation

This stove must be connected to the gas line in accordance with local codes and/or the National Fuel Gas Code, ANSI Z223.1 (In Canada, the current CAN/CSA B149.1 installation code).

The gas line screws into the gas valve at the back of the stove 5” in from the right side of the stove and 4 3/16” up from the base of the unit. After connecting the gas line, all joints in the line and connections at the valve should be checked for leaks. After connecting the gas line, all joints in the line and connections at the valve should be checked for leaks before final positioning of the unit. Conduct a gas leakage test of the appliance piping and control system downstream of the shutoff valve in the supply line to the appliance.

Gas Pressure Requirements

A MAJOR CAUSE OF OPERATING PROBLEMS WITH GAS APPLIANCES IS IMPROPER GAS PRESSURE!

The most important item to check during the initial installation and the first thing to check when operating problems occur is gas pressure! This appliance will not function properly unless the required gas pressure is supplied. See the table on this page for gas pressure requirements.

Two pressure taps are provided on the stove’s valve to check gas pressures. To access the taps remove the two socket head screws to remove the valve control panel. The taps are located above the on/off/pilot knob (see the diagram on Page 20). The right tap is the inlet (supply) pressure side. To check inlet pressure (with the stove burning) insert a small flat bladed screw driver into the tap and turn a half turn counter-clockwise. Cover the tap with the line from a manometer. Read the pressure. Close tap gently but securely after completing the check. The manifold (outlet) tap is to the left of the inlet tap. To check manifold pressure (with the stove burning at the high burn setting) insert a small flat bladed screwdriver into the tap and turn a half turn counter-clockwise. Cover the tap with the line from the manometer and check the pressure. Again close tap gently but securely after completing the check. Check the taps for gas leaks with a gas leak test solution (retighten if necessary).

If the pressure is not sufficient, make sure the gas supply line is large enough, The supply regulator is properly adjusted and the total gas load for the residence does not exceed the amount supplied.

The appliance and its individual shut off 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 psig.

The appliance must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig. Check with your gas supplier or plumber.

Fuel		Inlet Pressure		Manifold Pressure
Type
	Desired	Minimum	Maximum	On Hi	On Lo
				Fire	Fire
Natural	7" WC	5" WC	10.5" WC	3.5" WC	1.8" WC
Gas
LP Gas	11" WC	11" WC	13" WC	10" WC	6.0” WC

LP and Natural Gas Supplies:

Your Vintage™ gas stove is equipped from the factory for use with natural gas only as specified on the Safety / Listing label attached to the appliance. This appliance can only be operated using propane gas (LP) if a certified fuel conversion kit provided by Lennox Hearth Products is installed by a qualified service technician.

Also check the orifice size on the label on the igniter bracket. It must be the correct size for the fuel and altitude.

Do not run propane tank dry. Running the tank dry may cause a hazardous condition due to pressure drop in empty tank.

Solid fuel is NOT to be used with this unit.

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.