User’s Information Manual

48TF004-014 48TM004-014 Single-Package Rooftop Heating/ Cooling Units

NOTE TO INSTALLER

This manual should be left with the equipment owner.

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

—Do not store or use gasoline or other flam- mable vapors and liquids in the vicinity of this or any other appliance.

—WHAT TO DO IF YOU SMELL GAS

•Do not try to light any appliance.

•Do not touch any electrical switch; do not use any phone in your building.

•Immediately call your gas supplier from a neighbor’s phone. Follow the gas sup- plier’s instructions.

•If you cannot reach your gas supplier, call the fire department.

—Installation and service must be per- formed by a qualified installer, service agency or the gas supplier.

Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency, or the gas supplier.

Before performing recommended maintenance, be sure main power switch to unit is turned off and lockout tag is installed. Electrical shock could cause personal injury.

Your rooftop combination heating/cooling unit is equipped with an automatic direct spark ignition and induced draft com- bustion blower.

Do not attempt to light by hand; personal injury may result.

TO LIGHT UNIT

1.Do not turn off the electrical power to unit without first turning off the gas supply.

2.Before attempting to start the gas heating section, fa- miliarize yourself with all the procedures that must be followed.

3.Never attempt to manually light the main burners on unit with a match, lighter, or any other flame. If the electric sparking device fails to light the main burners, refer to the following shutdown procedures, then call your dealer as soon as possible.

If you do not follow these instructions exactly, a fire or explosion may result. Property damage, injury, or loss of life could occur.

See Fig. 1A and 1B for location of gas valve. Refer to Fig. 2 while proceeding with the following steps.

Step 1 — Set room thermostat to the lowest temperature setting and set SYSTEM switch to HEAT or AUTO. position.

Step 2 — Close the manual gas valve.

Step 3 — Turn off the electrical supply to the unit and install lockout tag.

Step 4 — Remove the burner access panel.

Step 5 — Move the control on the gas valve to the OFF position and wait 5 minutes.

Step 6 — Move control on gas valve to ON position. Step 7 — Replace the burner access panel.

Step 8 — Turn on the electrical supply to unit. Step 9 — Open the manual gas valve.

Step 10 — Set room thermostat selector slightly above room temperature to start unit. The induced-draft combustion air fan will start. Main gas valve will open and main burners should ignite within 5 seconds. If the burners do not light, there is a 22-second delay before another 5-second try. If the burner still does not light, the time delay is repeated. If the burner does not light within 15 minutes, there is a lockout. If burners still do not light, call for service.

Step 11 — Set the temperature selector on room thermostat to desired setting.

If the main burners fail to light, or the blower fails to come on, shut down gas heating section and call your dealer for service. Failure to follow these requirements could result in serious personal injury.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book	1	4	PC 111	Catalog No. 534-80104	Printed in U.S.A.	Form 48T-1SO	Pg 1	502	3-02	Replaces: 48TF-2SO
Tab	1a	6a