Carrier 48TM016 Air Conditioner User Manual

48TM016-028
Combination
Heating/Cooling Units
User’s Information Manual
NOTE TO INSTALLER
TO LIGHT UNIT
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
flammable 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 supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
— Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
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.
3. Never attempt to manually light the pilot on unit with
a match, lighter, or any other flame. If the electric
sparking device fails to light the pilot, refer to the
shutdown procedures, then call your dealer as soon as
possible.
If you do not follow these instructions exactly, a fire or
explosion may result, causing property damage, injury, or
loss of life.
See Fig. 1 for location of gas valves. 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 position.
Step 2 — Close the external manual gas valve.
Step 3 — Turn off the electrical supply to the unit.
Step 4 — Remove the burner compartment access panel.
Step 5 — Turn the control dial on the internal gas
valve counterclockwise
to the OFF position and wait
5 minutes.
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.
Step 6 — Turn control dial on internal gas valve clockwise
to ON position.
Step 7 — Replace the burner compartment access panel.
Step 8 — Turn on the electrical supply to unit.
Step 9 — Open the external gas valve.
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 combination heating/cooling unit is equipped with an
automatic intermittent pilot and induced draft power combustion blower.
Step 10 — Set room thermostat selector slightly above
room temperature to start unit. The induced-draft combustion
air fan will start. Main burners light within 30 seconds. Indoor
blower will start within a few minutes of main gas ignition.
Step 11 — Set the temperature selector on room thermostat
to desired setting.
Pilot will light automatically. Do not attempt to light by
hand; personal injury may result.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-80112
Printed in U.S.A.
Form 48TM-1SO
Pg 1
5-02
Replaces: New
Book 1 4
Tab 1a 6a
INDUCED DRAFT
MOTOR
MAINTAINING YOUR UNIT
INTEGRATED GAS
UNIT CONTROLLER
(HIDDEN)
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 assure proper functioning of the unit, flow of combustion
and ventilating air must not be obstructed from reaching the
unit. Clearance of at least 4 ft on all sides is required.
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Before proceeding with those things you might want to
maintain yourself, please carefully consider the following:
COMBUSTION
FAN HOUSING
MAIN BURNER
SECTION
FLUE BOX
COVER
1. TURN OFF GAS SUPPLY AND 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 doors 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 to a minimum,
be extremely careful when handling parts or reaching
into the unit.
MAIN GAS
VALVE
Fig. 1 — Typical Gas Heating Section
If the pilot fails to light, the main burner fails 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.
Air Filters — Air filters should be checked at least every 3
or 4 weeks and changed or cleaned whenever they become
dirty. Table 1 indicates the correct filter size for your unit. Remove the filter access panel to replace or inspect the filters. All
units have filter tracks into which the filters slide. Remove the
filters by pulling outward from the track. See Fig. 4 for filter
access panel location. Note the direction of flow arrows on the
filter frame.
For horizontal supply/return units, the size, location and
number of air filters varies from Table 1. If you have difficulty
in locating your air filter in the return-air duct system, or if you
have questions concerning proper filter maintenance, contact
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.
Units with outdoor air capability have a cleanable filter for
the outdoor air. This filter should be checked annually and
cleaned as necessary. Remove by removing screws in outdoor
air filter retainer and sliding filters out of the unit.
TO SHUT UNIT OFF
Do not turn off the electrical power to unit without first
turning off the gas supply.
Failure to follow these procedures can result in serious
fire or personal injury.
See Fig. 1 for location of gas valve. Refer to Fig. 3 while
proceeding with the following steps.
Step 1 — Set room thermostat to lowest temperature setting
and set SYSTEM switch to OFF position.
Step 2 — Close the external manual gas valve.
Step 3 — Turn off the electrical power supply to the unit.
Step 4 — Remove the burner compartment access panel.
Step 5 — Turn the control dial on the internal gas
valve counterclockwise
to the OFF position.
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 efficiency
and in some cases, fire.
Step 6 — Replace the burner compartment access panel.
Step 7 — If unit is being shut down because of a malfunction, 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.
Table 1 — Indoor-Air Filter Data*
UNIT SIZE
48TM
016-028†
TYPE OF
FILTER
Fiberglass
Throwaway
QUANTITY...SIZE (in.)
4...20 x 20 x 2
4...16 x 20 x 2
*When replacing filters, always use the same type and size originally supplied.
†The 48TM028 unit requires 2-in. industrial grade filters capable of
handling face velocities of up to 625 ft/min (such as American Air
Filter no. 5700 or equivalent).
2
STEP 1
STEP 2
STEP 4
STEP 5
STEP 7
STEP 6
STEP 8
STEP 3
STEP 9
STEP 10
Fig. 2 — To Light Unit
3
STEP 1
STEP 1
STEP 3
STEP 3
STEP 2 STEP 2
48TFD005-009
48TFE004-007
48TFL005,006
48TFM004-006
STEP 4
48TFF004-012
48TFD012,014
48TFE008,014
48TFN004-006
STEP 5
STEP 4
48TFD005-009
48TFE004-007
48TFL005,006
48TFM004-006
48TFF004-012
48TFD012,014
48TFE008,014
48TFN004-006
STEP 7
STEP 6
STEP 5
STEP 6
STEP 8
STEP 9
Fig. 3 — To Shut Unit Off
Fig. 2 — To Light Unit
4
STEP 7
STEP 10
seal is maintained. Contact your dealer for the required periodic maintenance.
BURNER ACCESS
PANEL (HIDDEN)
HOOD
(OPTION)
Fans and Belts — Periodically check the condition of
fan wheels and housings, and belt tension. When service is necessary, call your dealer.
Evaporator-, Condenser-, and Combustion
Fan Motors — Lubrication is not recommended. Bearings
will not require lubrication for at least 5 years of normal operation. After 5 years, motor life can be extended by having the
motors serviced at an authorized motor service shop.
Fan Shaft Bearings — Lubrication is not recommended. When service is necessary, call your dealer.
OUTDOOR-AIR
FILTER
RETAINER
Evaporator and Condenser Coils — Cleaning of the
OUTDOOR-AIR
FILTERS
coils should only be done by qualified service personnel. Contact your dealer for the required annual maintenance.
MOTORS AND FILTER
ACCESS PANEL
Condensate Drain — The drain pan and condensate
48TM016, 020
HOOD
(OPTION)
drain line should be checked and cleaned at the same time the
cooling coils are checked by your dealer.
BURNER ACCESS
PANEL (HIDDEN)
Compressor — All compressors are factory shipped with
a normal charge of the correct type refrigeration grade oil in
them and should rarely require additional oil. The service technician must be certain the proper oil level is maintained in the
compressor when it is installed and running.
Condenser Fan
Do not poke sticks, screwdrivers, or any other object into
revolving fan blades. Severe bodily injury may result.
OUTDOORAIR FILTER
RETAINER
MOTOR AND
FILTER
ACCESS PANEL
OUTDOORAIR FILTERS
The fan must be kept free of all obstructions to ensure
proper cooling. Contact your dealer for any required service.
48TM025
HOOD
(OPTION)
Electrical Controls and Wiring — Electrical controls
are difficult to check without proper instrumentation; therefore,
if there are any discrepancies in the operating cycle, contact
your dealer and request service.
BURNER ACCESS
PANEL (HIDDEN)
Integrated Gas Controller (IGC) — The IGC board
incorporates an LED that emits a flashing light to indicate an
alarm code. If the furnace section will not operate and the LED
is flashing a code (2 to 8 flashes in succession), contact your
dealer and request service. See Fig. 1.
Refrigerant Circuit — The refrigerant circuit is difficult
to check for leaks without the proper equipment; therefore, if
inadequate cooling is suspected, contact your dealer for service.
OUTDOORAIR FILTER
RETAINER
Combustion Area and Vent System — The comOUTDOORAIR FILTERS
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 improper performance if allowed to build up.
MOTOR AND FILTER
ACCESS PANEL
48TM028
Fig. 4 — Panel Locations
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 assembly and
the flue collector box cover and, when completed, reinstalling
the gas controls assembly for proper operation. Also, the flue
collector box cover must be replaced correctly so that a proper
If your unit makes an especially loud noise when the main
burners are ignited, shut down the heating section and call
your dealer.
See Fig. 1 and proceed as follows to inspect the combustion
area and power-venting system of your unit.
1. Turn off electrical power and gas supply to your unit.
2. Remove burner compartment access panel.
5
10. Inspection of all electrical wiring and components to
assure proper connection.
11. Inspection for leaks in the refrigerant circuit. Pressurecheck to determine appropriate refrigerant charge.
12. Operational check of the unit to determine working conditions. Repair or adjustment should be made at this time.
13. Your servicing dealer may offer an economical service
contract that covers seasonal inspections. Ask for further
details.
Complete Service Instructions can be found in the unit
Installation, Start-Up and Service Instructions literature.
3. Using a flashlight, carefully inspect the burner areas for
dirt, soot, rust, or scale.
If dirt, soot, rust, or scale accumulations are found, call
your dealer and do not operate your heating section.
4. When you have completed your inspection, follow the
start-up procedures in this manual to restore your unit to
operation.
5. Observe unit heating operation, and watch the burner
flame with the access panel removed, to see if it is bright
blue. If you observe a suspected malfunction, or that the
burner flames are not bright blue, call your dealer. See
Fig. 5. Some yellow flame may be present due to the panel being removed.
6. Replace burner compartment access panel.
BEFORE YOU CALL FOR SERVICE
CHECK FOR SEVERAL EASILY SOLVED
PROBLEMS
If insufficient heating or cooling is suspected:
( ) Check for sufficient airflow. Check the air filter for dirt.
Check for blocked return- or supply-air grilles. Be sure they
are open and unobstructed. If these checks do not reveal 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 heating season,
or below the indoor temperature during the cooling season. Be
sure the SYSTEM switch is in the proper HEAT or COOL
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 manual shutoff valve.
Is this lever parallel with the pipe, indicating that the valve is
open? Or is the lever at a right angle, indicating 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 startup procedures listed in this manual.
NOTE: Before proceeding with the next check, turn off the
electrical power supply to the unit. Remove the control access
door.
( ) During the heating season, check the control dial on the
gas valve. Is it in the ON position? If it is not, be sure it has not
been turned off for the purpose of safety. If nothing else seems
to be amiss, follow the start-up procedures in this manual.
( ) If your unit still fails to operate, call your servicing 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.
Fig. 5 — Proper Flame Appearance
Unit Panels — After performing any maintenance or
service on the unit, be sure all panels are securely fastened in
place to prevent rain from entering unit cabinet and to prevent
disruption of the correct unit airflow pattern.
REGULAR DEALER MAINTENANCE
In addition to the type of routine maintenance you might be
willing to perform, your unit should be inspected regularly by a
properly trained service technician. An inspection (preferably
each year, but at least every other year) should include the
following:
1. Inspection of all flue product passages — including the
burners, combustion baffles, heat exchanger, flue collector box, and vent pipe.
2. Inspection of all combustion- and ventilation-air passages
and openings.
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. Inspection, and if required, cleaning of the evaporator
drain pan.
6. Inspection, cleaning, and lubrication of blower wheel
housing and motor.
7. Inspection of all supply- and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems
found should be resolved at this time.
8. Inspection of the unit base to ensure that no cracks, gaps,
etc., exist which may cause a hazardous condition.
9. Inspection of the unit casing for signs of deterioration.
IN CASE OF TROUBLE
If, after performing the above, unit performance is unsatisfactory, shut off the unit and call your dealer.
Dealer’s Name _____________________________________
Telephone No. _____________________________________
Unit Model ________________________________________
Unit Serial Number _________________________________
6
Copyright 2002 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 534-80112
Printed in U.S.A.
Form 48TM-1SO
Pg 8
5-02
Replaces: New
Book 1 4
Tab 1a 6a