Carrier 48TJD005-014, 48TJE004-014, 48TJF004-012 User Manual

Single-Package Rooftop Heating/Cooling Units

User’s Information Manual

48TJD005-014

48TJE004-014

48TJF004-012

This manual should be left with the equipment owner.

NOTE TO INSTALLER

FOR YOUR SAFETY

Do not store or use gasoline or other
flammable vaporsand liquids in the vicinity
of this or any other appliance.

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.

FOR YOUR SAFETY

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Donot touch any electrical switch; donot
use any phone in your building.

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

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

INTAKE LOUVERS

BURNER
ACCESS
PANEL

Fig. 1A — Gas Valve Location (Sizes 004-007)

GAS
VALVE

FLUE VENT

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

Your rooftop combination heating/cooling unit is equipped
with an automaticdirect spark ignition and induced draft com­bustion blower.

Fig. 1B — Gas Valve Location (Sizes 008-014)

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

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

TO LIGHT UNIT

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.

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, fa­miliarize yourself with all the procedures that must
be followed.

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

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

Book 1 4
Tab 1a 6a

PC 111 Catalog No. 564-991 Printed in U.S.A. Form 48TJ-3SO Pg 1 5-98 Replaces: 48TJ-2SO

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 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
first turning off the gas supply.

2. 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.

Failure to follow these procedures can result in

serious fire or personal injury.

Step 7 — 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 opera­tion 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. Im­mediately call a qualified 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, experi­enced personnel.Your dealer can help you establish a stand­ard procedure.

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

To ensure proper functioning of the unit, flow of combus­tion 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 flue 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:

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

Step 1 — Set room thermostat to lowest temperature set-

ting and set SYSTEM switch to OFF position.

Step 2 — Close the external manual gas valve.
Step 3 — Turn off the electrical power supply to unit.
Step 4 — Remove the burner access panel.
Step 5 — Move the control on the gas valve to the OFF

position.

Step 6 — Replace the burner access panel.

1. TURN OFF GAS SUPPLY AND THEN ELECTRI­CAL POWER TO YOUR UNIT BEFORE SERVIC­ING OR PERFORMING MAINTENANCE.

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

3. When removing access panels or performing main­tenance 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 reach­ing into the unit.

2

STEP 1

STEP 2

STEP 3

48TJD005-009
48TJE004-007

STEP 6

STEP 4

48TJF004-007
48TJD012,014
48TJE008-014
48TJF008-012

48TJD005-009
48TJE004-007

48TJF004-007
48TJD012,014
48TJE008-014
48TJF008-012

STEP 5

STEP 7

STEP 8

STEP 9

Fig.2—ToLight Unit

STEP 10

3