Carrier 48TJE004-014, 48TJF004-012, 48TJD005-014 To Shut Unit OFF, Maintaining Your Unit

Step 8 Ð Turn on the electrical supply to unit.

Step 9 Ð Open the manual gas valve.

Step 10 Ð Set room thermostat selector slightly above room temperature to start unit. The induced-draft combus- tion 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 lock- out. If burners still do not light, call for service.

Step 11 Ð Set the temperature selector on room thermo- stat 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.

TO SHUT UNIT OFF

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

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

Failure to follow these procedures can result in serious ®re or personal injury.

Refer to Fig. 3 while proceeding with the following steps.

Step 1 Ð Set room thermostat to lowest temperature set- ting and set SYSTEM switch to OFF position.

Step 2 Ð Close the external manual gas valve.

Step 3 Ð Turn off the electrical power supply to unit. Step 4 Ð Remove the burner access panel.

Step 5 Ð Move the control on the gas valve to the OFF position.

Step 6 Ð Replace the burner access panel.

Step 7 Ð If unit is being shut down because of a mal- function, call your dealer as soon as possible.

If unit is being shut down because the heating season has ended, restore electrical power to the unit to ensure opera- tion of the cooling system during the cooling season.

Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the unit before shutting off the electrical supply.

Do not use this unit if any part has been under water. Im- mediately call a quali®ed service technician to inspect the unit and to replace any part of the control system and any gas control which has been under water.

MAINTAINING YOUR UNIT

All maintenance should be handled by skilled, experi- enced personnel. Your dealer can help you establish a stand- ard procedure.

For your safety, keep the area around the unit clear and free of combustible materials, gasoline, and other ¯am- mable liquids and vapors.

To ensure proper functioning of the unit, ¯ow of combus- tion and ventilating air must not be prevented from reaching the unit. Clearance of at least 3 ft on size 004-007 units and 4 ft on size 008-014 units on the ¯ue and condenser sides and 6 in. on all other sides is required. A clearance of 5 ft is required above the condenser discharge.

ROUTINE MAINTENANCE AND CARE

FOR THE EQUIPMENT OWNER

Consider the following information before maintaining or servicing equipment:

1.TURN OFF GAS SUPPLY AND THEN ELECTRI- CAL POWER TO YOUR UNIT BEFORE SERVIC- ING OR PERFORMING MAINTENANCE.

2.Do not turn off electrical power to this unit without ®rst turning off the gas supply.

3.When removing access panels or performing main- tenance functions inside your unit, be aware of sharp sheet metal parts and screws. Although special care has been taken to reduce sharp edges inside the unit, be extremely careful when handling parts or reach- ing into the unit.

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