Lennox International Inc GSR21V, GSR21Q Carbon monoxide gas is invisible, odorless, and toxic

4 - DO NOT draw the return air from a room where another gas appliance (ie., a water heater) is

installed. Even though this furnace draws its com- bustion air from outside of the structure, other gas appliances that share a utility room may not. When return air is drawn from a room, a negative pressure is created in the room. If a gas appliance is operating in a room with negative pressure, the flue products can be pulled back down the vent pipe and into the room. This reverse flow of the flue gas may result in incomplete combustion and the formation of carbon monoxide gas. This toxic gas might then be distrib- uted through the house by the furnace duct system.

Your furnace is a gas appliance. It is critical that the gas supplied to the unit be completely burned to avoid the pro- duction of carbon monoxide gas. Complete combustion of the gas requires, but is not limited to, correct gas pres- sure and gas flow rate, adequate combustion, air, and proper venting.

WARNING

Carbon monoxide gas is invisible, odorless, and toxic.

Exposure to this gas can cause personal injury and even death to all occupants, including pets. Any item that is pow- ered by or gives off heat from a combustion process (in- cluding lawn mowers, automobiles, and fireplaces) has the potential to produce carbon monoxide gas. Because of this, Lennox recommends the use of a carbon monox-

ide detector in your home, even if you do not own gas

81,723(5$7,21

This appliance does not have a pilot. It is equipped with an ignition system which automatically lights the burner. Do not try to light by hand.

A-Gas Valve Operation

WARNING

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

Gas Valve Operation for Robertshaw and White Rodgers ValvesROBERTSHAW(Figures 27200GASand 5) VALVE

GAS VALVE
SELECTOR ARM
IN OFF
WHITEPOSITION36EGASRODGERSVALVE
GAS VALVE	FIGURE2
SHOWN
IN OFF
POSITION

appliances. Reliable detectors are available at reason-

able retail prices. Contact your independent Lennox dealer		1-
for more details about this investment in your safety.		2-
		3-
Your furnace is designed to meet standards set by nation-
al agencies, and to operate safely when properly installed
and maintained. However, the unit’s performance can be		4-
greatly impacted by the individual installation and the op-		5-
erating environment. It is your responsibility to ensure
that this appliance is maintained. Proper maintenance is
critical for your safety and the satisfactory operation of the		6-
product. Lennox strongly recommends annual in-	￿
spection and maintenance of this appliance. Contact
your independent Lennox dealer for an inspection by 3DJHa
qualified service technician.

Set thermostat to lowest setting. See figure 3.

Turn off all electrical power to furnace. See figure 4.

This appliance Is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

Remove unit access panel.

On Robertshaw 7200 gas valve, depress lever on gas control and move to OFF and release. For White Rodgers 36E gas valves, move switch to OFF. Do not force.

Wait five (5) minutes to clear out any gas. Smell for gas, including near the floor. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instruc- tions. If you do not smell gas go to next step.