48TJD005-014
48TJE004-014
48TJF004-012
Single-Package Rooftop Heating/Cooling Units
User’s Information Manual
NOTE TO INSTALLER
INTAKE LOUVERS
This manual should be left with the equipment owner.
FOR YOUR SAFETY
Do not store or use gasoline or other
flammable vapors and 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.
BURNER
ACCESS
PANEL
GAS
VALVE
FLUE VENT
Fig. 1A — Gas Valve Location (Sizes 004-007)
FOR YOUR SAFETY
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
supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
Before performing recommended maintenance, be sure
main power switch to unit is turned off. Electrical shock
could cause personal injury.
Fig. 1B — Gas Valve Location (Sizes 008-014)
Your rooftop combination heating/cooling unit is equipped
with an automatic direct spark ignition and induced draft com-
bustion blower.
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.
Do not attempt to light by hand; personal injury may
result.
Step 2 — Close the manual gas valve.
TO LIGHT UNIT
Step 3 — Turn off the electrical supply to the unit.
Step 4 — Remove the burner access panel.
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.
If you do not follow these instructions exactly, a fire
or explosion may result. Property damage, injury, or loss
of life could occur.
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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 PC 111 Catalog No. 564-991 Printed in U.S.A. Form 48TJ-3SO Pg 1 5-98 Replaces: 48TJ-2SO
Tab 1a 6a
4
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STEP 1
STEP 3
STEP 2
48TJD005-009
48TJE004-007
STEP 4
48TJF004-007
48TJD012,014
48TJE008-014
48TJF008-012
STEP 5
48TJD005-009
48TJE004-007
48TJF004-007
STEP 7
48TJD012,014
48TJE008-014
48TJF008-012
STEP 6
STEP 10
STEP 9
STEP 8
Fig. 2 — To Light Unit
3
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STEP 1
STEP 3
STEP 2
STEP 4
48TJD005-009
48TJE004-007
48TJF004-007
48TJD012,014
48TJE008-014
48TJF008-012
STEP 5
STEP 6
STEP 7
Fig. 3 — To Shut Unit Off
4
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Air Filter(s) — Air filter(s) should be checked at least
every 3 or 4 weeks and changed or cleaned when necessary.
Table 1 indicates the correct filter size for your unit. See Fig. 4
for filter access door location.
To replace or inspect filters:
1. Lift up and remove filter access panel.
2. While holding filter, tilt upper filter rack.
3. Remove filters by pulling up and out toward you from
the track.
4. Inspect or replace filters.
5. Return filters to filter track. Note direction of airflow ar-
rows on filter frame.
6. Replace filter access panel.
Heat Exchanger — To ensure dependable and efficient
heating operation, the heat exchanger should be checked by
a qualified maintenance person before each heating season,
and cleaned when necessary. This checkout should not be
attempted by anyone not having the required expertise and
equipment to do the job properly. Checking and/or cleaning
the heat exchanger involves removing the gas controls as-
sembly and the flue collector box cover and, when com-
pleted, reinstalling the gas controls assembly for proper op-
eration. Also, the flue collector box cover must be replaced
correctly so that a proper seal is maintained. Contact your
dealer for the required periodic maintenance.
Fans, Belts and Fan Motor — Periodically check the
condition of the fan wheels and housings, belt tension and
fan motor shaft bearings. No lubrication of condenser or evapo-
rator fan bearings or motors is required or recommended.
If you have difficulty in locating your air filter, or if you
have questions concerning proper filter maintenance, con-
tact your dealer for instructions. When replacing your unit
filters, always use the same size and type of filter that was
originally supplied by the installer.
Evaporator and Condenser Coils — Cleaning of
the coils should be done by qualified service personnel. Contact
your dealer for the required annual maintenance.
Units with outdoor air capability have a cleanable filter
for the outdoor air. This filter should be checked annually
and cleaned as necessary with steam or hot water and a mild
detergent. Do not use throwaway filters in place of cleanable
filters.
Condensate Drain — The drain pan and condensate
drain line should be checked and cleaned at the same time
the cooling coils are checked by your dealer.
Compressor — All compressors are factory supplied with
a normal charge of the correct type refrigeration-grade oil in
them and should not require additional oil.
Condenser Fan
Never operate your unit without filters in place. Failure
to heed this warning may result in damage to the blower
motor and/or compressor. An accumulation of dust and
lint on internal parts of your unit can cause loss of ef-
ficiency and, in some cases, fire.
Do not poke sticks, screwdrivers, or any other
object into revolving fan blades. Severe bodily injury
may result.
The fan must be kept free of all obstructions to ensure
proper cooling. Contact your dealer for any required service.
Table 1 — Indoor-Air Filter Data
Electrical Controls and Wiring — Electrical con-
trols are difficult to check without proper instrumentation;
therefore, if there are any discrepancies in the operating cycle,
contact your dealer and request service.
INDOOR-AIR FILTERS
(Throwaway Fiberglass)
UNIT SIZE
48TJ
QUANTITY
SIZE (in.)
16 x 25 x 2
16 x 20 x 2
20 x 20 x 2
004-007
008,009
012,014
2
4
4
Refrigerant Circuit — The refrigerant circuit is diffi-
cult to check for leaks without the proper equipment; there-
fore, if inadequate cooling is suspected, contact your local
dealer for service.
NOTE: Replacement filters should be UL (Underwriters’ Laborato-
ries) certified or equivalent.
FILTER ACCESS PANEL
FILTER ACCESS PANEL
48TJ004-007
48TJ008-014
Fig. 4 — Typical Filter Access Panel Location
5
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Combustion Area and Vent System — The com-
bustion area and vent system should be visually inspected
before each heating season. The normal accumulation of dirt,
soot, rust, and scale can result in loss of efficiency and im-
proper performance if allowed to build up.
Unit Panels — After performing any maintenance or serv-
ice on the unit, be sure all panels are securely fastened in
place to prevent rain from entering unit cabinet and to pre-
vent disruption of the correct unit airflow pattern.
If your unit makes an unusual or especially loud noises
during heating, shut down the heating section and call
your dealer.
REGULAR DEALER MAINTENANCE
In addition to the type of routine maintenance you might
be willing to perform, your unit should be inspected regu-
larly by a properly trained service technician. An inspection
(preferably each year, but at least every other year) should
include the following:
See Fig. 1A, 1B and 5 and proceed as follows to inspect
the combustion area and power-venting system of your unit.
1. Turn off gas supply to your unit.
2. Turn off electrical power to your unit.
3. Remove burner access panel.
4. Using a flashlight, carefully inspect the burner areas for
1. Inspection of all flue product passages — including the
burner, heat exchanger, and flue collector box.
dirt, soot, or scale.
2. Inspection of all combustion- and ventilation-air pas-
sages and openings.
If dirt, soot, rust, or scale accumulations are found,
call your dealer and do not operate your heating sec-
tion.
3. Close inspection of all gas pipes leading to and inside
your unit.
4. Inspection, and if required, cleaning of the condenser
and evaporator coils.
5. When you have completed your inspection, follow the
start-up procedures in this manual to restore your unit to
operation.
5. Inspection, and if required, cleaning of the condensate
drain pan and trap.
6. Observe unit heating operation.
6. Inspection and cleaning of blower wheel housing and
motor.
Components in heat section may be hot after unit
has been started up. When observing flame, be care-
ful not to get to close to or touch heating compo-
nents. Serious personal injury may result.
7. Inspection of all supply- and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems found
should be resolved at the time of inspection.
8. Inspection of the unit base for cracks, gaps, etc., which
may cause a hazardous condition.
Watch the burner flame to see if it is bright blue. If you
observe a suspected malfunction or that the burner flame
is not bright blue, call your dealer.
9. Inspection of the unit casing for signs of deterioration.
7. Replace burner access panel.
10. Inspection of all electrical wiring and components to en-
sure proper connection.
11. Inspection for leaks in the refrigerant circuit. Pressure-
check to determine appropriate refrigerant charge.
12. Inspection and cleaning of fan wheels and housings, belt
tension, and fan motor and shaft bearings.
13. Operational check of the unit to determine working con-
ditions. Repair or adjustment should be made at the time
of inspection.
Your servicing dealer may offer an economical service con-
tract that covers seasonal inspections. Ask for further de-
tails.
INDUCED-DRAFT
MOTOR
Complete Service Instructions can be found in the unit
Installation, Start-Up and Service Instructions.
GAS VALVE
Fig. 5 — Typical Heat Section Detail
(Size 004-007 Shown)
6
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(
) During the heating season, check the control dial on
BEFORE YOU CALL FOR SERVICE,
CHECK FOR PROBLEMS THAT CAN BE
EASILY SOLVED
the gas valve. Is it in the ON position? If it is not, be sure
it has not been turned off for safety reasons. If no safety haz-
ards are present, follow the start-up procedures in this manual.
If insufficient heating or cooling is suspected:
(
) If your unit still fails to operate, call your servicing
(
) Check for sufficient airflow. Check the air filter for
dealer for troubleshooting and repairs. Specify the model and
serial numbers of your unit. (Record them in this manual in
the space provided.) If the dealer knows exactly which unit
you have, he may be able to offer suggestions over the phone,
or save valuable time through knowledgeable preparation for
the service call.
dirt. Check for blocked return- or supply-air grilles. Be sure
they are open and unobstructed. If these checks do not re-
veal the cause, call your servicing dealer.
If your unit is not operating at all, check the following list
for easy solutions:
(
) Check to be sure that your thermostat temperature
selector is set above the indoor temperature during the heat-
ing season, or below the indoor temperature during the cool-
ing season. Be sure the SYSTEM switch in the proper HEAT,
COOL or AUTO. position and not in the OFF position.
(
) Is the electrical supply switch ON?Are any fuses blown,
or has the circuit breaker tripped?
) During the heating season, check the external manual
IN CASE OF TROUBLE
If, after performing the above, unit performance is unsat-
isfactory, shut off the unit and call your dealer.
(
shutoff valve. Is this lever parallel with the pipe, indicating
that the valve is open? Or is the lever at a right angle, in-
dicating that the valve is closed? If closed, has the gas been
shut off for safety reasons? Otherwise, you may open the
valve and follow the start-up procedures listed in this manual.
Dealer’s Name.
Telephone No.
Unit Model
NOTE: Before proceeding with the next check, turn OFF
the electrical power supply to the unit. Remove the control
access door.
Unit Serial Number
7
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CARRIER CORPORATION
®
IF YOUR UNIT DOES NOT WORK, FOLLOW THESE STEPS IN ORDER:
FIRST: Contact the installer. You may find his name on the product or in your
Homeowner's Packet. If his name is not known, call your builder if
yours is a new residence.
SECOND: Contact the nearest CARRIER distributor. (See telephone yellow pages.)
THIRD: Contact:
CARRIER CORPORATION
Consumer Relations Department
P.O. Box 4808
Syracuse, New York 13221
Phone: 1-800-CARRIER (227-7437)
Model No.
Unit Serial No.
Date of Installation
Name of Owner
Installed by
Address of Installation
Outdoor Cooling or Heating-Cooling Product
(Units Smaller Than 185,000-Btuh Cooling Capacity)
Limited Warranty
LIMITATIONS OF WARRANTIES—ALL IMPLIED WARRANTIES (INCLUDING
IMPLIED WARRANTIES OF MERCHANTABILITY) ARE HEREBY LIMITED IN
DURATION TO THE PERIOD FOR WHICH THE LIMITED WARRANTY IS GIVEN.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE
ONE-YEAR WARRANTY—This CARRIER CORPORATION (herein after referred
to as ‘COMPANY’) product is warranted to be free from defects in material and
workmanship under normal use and maintenance for a period of one year from
the date of original installation whether or not actual use begins on that date. A
new or remanufactured part, at the COMPANY'S sole option, to replace any EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND
MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR,
DEALER, OR OTHER PERSON WHATSOEVER.
defective part will be provided without charge for the part itself; PROVIDED the
defective part is returned to our distributor through a qualified servicing dealer.
The replacement part assumes the unused portion of the warranty.
ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED
DURING NORMAL WORKING HOURS. ALL REPLACEMENT PARTS, WHETHER
NEW OR REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY
THE REMAINING TIME PERIOD OF THIS WARRANTY.
THIS WARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred
for diagnosing, repairing, removing, installing, shipping, servicing or handling of
either defective parts or replacement parts or complete unit. Such costs may be
covered by a separate warranty provided by the installer.
THE COMPANY WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the installation and servicing instructions or
owner's manual including coil cleaning, filter cleaning and/or replacement and
lubrication.
EXTENDED 4-YEAR WARRANTY ON COMPRESSOR ONLY —During the
second through fifth years after the date of original installation, the COMPANY
further warrants the compressor against defects in material or workmanship under
normal use and maintenance. A new or remanufactured compressor, at the
COMPANY'S sole option, will be provided under the same conditions as stated in
the ONE-YEAR WARRANTY.
2. Damage or repairs required as a consequence of faulty installation, misapplication,
abuse, improper servicing, unauthorized alteration or improper operation.
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or
other damages due to the inadequacy or interruption of electrical service.
EXTENDED 4-YEAR WARRANTY ON GAS-FIRED HEAT EXCHANGER
ONLY—During the second through fifth years after the date of original installation,
the COMPANY further warrants the gas-fired heat exchanger against defects in
4. Damage as
a
result of floods, winds, fires, lightning, accidents, corrosive
environments or other conditions beyond the control of the COMPANY.
5. Parts not supplied or designated by the COMPANY, or damages resulting from
their use.
material or workmanship under normal use and maintenance.
A
new or
remanufactured heat exchanger, at the COMPANY'S sole option, will be provided
under the same conditions as stated in the ONE-YEAR WARRANTY.
6. COMPANY products installed outside the continental U.S.A., Alaska, Hawaii and
Canada.
THESE EXTENDED WARRANTIES DO NOT INCLUDE LABOR OR OTHER
COSTS incurred for diagnosing, repairing, removing, installing, shipping, servicing
or handling of either defective parts or replacement parts.
7. Electricity or fuel costs or increases in electricity or fuel costs from any reason
whatsoever including additional or unusual use of supplemental electric heat.
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMER-
CIAL DAMAGE OF ANY NATURE WHATSOEVER. Some states do not allow the
exclusion of incidental or consequential damages, so the above limitation may not
apply to you.
THESE WARRANTIES APPLY ONLY TO PRODUCTS IN THEIR ORIGINAL
INSTALLATION LOCATION AND BECOME VOID UPON REINSTALLATION.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Catalog No. 530-098
Effective on product manufactured after July 1, 1987. Supersedes any other warranty certificates supplied with the product.
Copyright 1998 Carrier Corporation
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. 564-991
Printed in U.S.A.
Form 48TJ-3SO
Pg 8
5-98
Replaces: 48TJ-2SO
Tab 1a 6a
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