Carrier 58TUA Guide

INDUCED-COMBUSTION 58TUA & 58TMA
GAS FURNACE
USER’S INFORMATION MANUAL FOR
THE OPERATION AND MAINTENANCE
OFYOUR NEW GAS-FIRED FURNACE
NOTETO INSTALLER:
THIS MANUAL MUST BE LEFT WITH
THE EQUIPMENT USER.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IFYOU 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.
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.
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HIGH EFFICIENCY GAS FURNANCE
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Do not use this furnace if any part has been under
water. Immediately call a qualified service techni-
cian to inspect the furnace and to replace any part
of the control system and gas control which has
been under water.

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WELCOME TO TODAY’S
GENERATION OF
COMFORT
Congratulations!Your new, high-
efficiencygasfurnaceis a soundinvest-
ment which will reward you and your
family with years of warm memories
winter after winter.
Not only is your new furnace energy
efficient, it is also extremely reliable
and supplies superior home comfort.
Spend just a few minutes with this
booklet to learn about the operation
of your new furnace and the small
amount of maintenance it takes to
keep it operating at peak efficiency.
Years went into the development of
your new furnace. Take a little time
now to assure its most efficient opera-
tion for years to come.
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MODEL 58TUA
UPFLOW FURNACE
2
MODEL 58TMA
DOWNFLOW/
HORIZONTAL FURNACE
UPFLOW FURNACE COMPONENTS
Relief Box
Rating Plate
Gas Valve Control Knob or Electric Switch (On/Off)
2-Stage Gas Valve
Manual Reset Flame Rollout Switch
Gas Burner
Flame Sensor
Hot Surface Ignitor
Status LED Light
Blower and Blower Motor
Draft Safeguard Tube and Switch
Gas Manifold
Blower Door Safety Switch
Filter Retainer
Air Filter
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15
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DOWNFLOW/HORIZONTAL
FURNACE COMPONENTS
Manual Reset Auxiliary Limit Switch
Blower and Blower Motor
Relief Box
Gas Valve Control Knob or Electric Switch (On/Off)
2-Stage Gas Valve
Gas Burner
Rating Plate
Status LED Light
Blower Door Safety Switch
Draft Safeguard Tube and Switch
Manual Reset Flame Rollout Switch (2)
Gas Manifold
Hot Surface Ignitor
Flame Sensor
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IMPORTANT FACTS
Your furnace must have adequate airflow for efficient com-
bustion and safe ventilation. Do not enclose it in an airtight
room or “seal’’ it behind solid doors.
To minimize the possibility of serious personal injury, fire,
furnace damage, or improper operation,
carefully follow
these safety rules:
•Keep the area around your furnace free of combustible
materials, gasoline, and other flammable liquids and vapors.
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•Do not cover the furnace, store trash or debris near it, or
in any way block the flow of fresh air to the unit.
•Combustion air must be clean and uncontaminated with
chlorine or fluorine. These compounds are present in
many products around the home, such as: water softener
salts, laundry bleaches, detergents, adhesives, paints, var-
nishes, paint strippers, waxes, and plastics.
Make sure the combustion air for your furnace does not con-
tain any of these compounds. During remodeling be sure the
combustion air is fresh and uncontaminated. If air with
vapors of these compounds is burned in your furnace, the
heat exchangers and metal vent system may deteriorate.
•A furnace installed in an attic or other insulated space
must be kept free and clear of insulating material. Examine
the furnace area when installing the furnace or adding more
insulation. Some materials may be combustible.
NOTE: Do not use this furnace if any part has been under
water. Immediately call a qualified service technician to
inspect the furnace and to replace any part of the control
system, electrical components and any gas control which has
been under water.
NOTE: The qualified installer or agency must use only
factory-authorized replacement parts, kits, and accessories
when servicing this product.
This furnace contains safety devices which must be manu-
ally reset. If the furnace is left unattended for an extended
period of time, have it checked periodically for proper oper-
ation. This precaution will prevent problems associated
with no heat, such as frozen water pipes, etc. See “Before
You Request a Service Call’’ section in this manual.
SAFETY CONSIDERATIONS
Installing and servicing heating equipment can be hazard-
ous due to gas and electrical components. Only trained and
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qualified personnel should install, repair, or service heating
equipment.
Untrained personnel can perform basic maintenance func-
tions such as cleaning and replacing air filters. All other
operations must be performed by trained service person-
nel. Observe safety precautions in this manual, on tags and
labels attached to the furnace, and other safety precautions
that may apply.
Recognize safety information. This is the safety-alert sym-
bol . When you see this symbol on the furnace and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety-alert sym-
bol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING
signifies hazards which
could result in personal injury or
death. CAUTION is used to identify unsafe practices which
would result in minor personal injury or product and prop-
erty damage.
STARTING YOUR FURNACE
Instead of a continuously burning pilot flame, your furnace
uses an automatic hot surface ignition system to light the
burners each time the thermostat turns your furnace on.
Follow these important safeguards:
•Never attempt to manually light the burners with a match
or other source of flame.
6
•Read and follow the operating instructions on the furnace,
especially the item that reads as follows:
Wait 5 minutes to clear out any gas. Then smell for gas,
includingnear the floor.If yousmell gas,
STOP! Follow“B’’
in the above safety information on this label. If you don’t
smell gas, go to the next step.
•If a suspected malfunction occurs with your gas control
system, such as the burners do not light when they should,
refer to the shutdown procedures on the furnace or see
“Shutting Down your Furnace”section in this manual, then
call your dealer as soon as possible.
•
CheckAir Filter: Before attempting to start your furnace,
be sure the furnace filter is clean and in place. (See the main-
tenance section of this manual.) Then proceed as follows:
STEPS FOR STARTING YOUR
FURNACE
1. Set your room thermostat to the lowest temperature set-
ting. (See Fig. 7.)
2. Close the external manual gas valve. (See Fig. 8.)
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3. Turn off electrical supply to the furnace. (See Fig. 9.)
4. Remove the furnace access door(s).
a. Downflow/Horizontal—Remove blower door after
removing 2 screws first, then remove the control
door. (See Fig. 10.)
b. Upflow—Remove control door. (See Fig. 11
.)
10 11
5. The gas valve will have EITHER a control knob or con-
trol switch to turn off and on. Turn the control knob or
switch on the gas valve to the OFF position and wait
5 minutes. (See Fig. 12 or 13.)
6. After waiting 5 minutes, turn the control knob or switch
on the gas valve to the ON position. (See Fig. 14 or 15.)
7. Replace the access door(s). See Fig. 16 for upflow and
Fig. 17 for downflow. Replace control doorfirst on
downflow furnaces. Replace blower door and secure
with 2 screws.
8. Turn ON the electrical supply to the furnace. (See
Fig. 18.)
WARNING
Should overheating occur or the gas valves fail to
shut off the gas supply, turn off the manual gas
valve to the furnace BEFORE turning off the elec-
trical supply. (See Fig. 8.) A failure to follow this
warning could result in a fire or explosion, and
personal injury or death.
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9. Open the external manual gas valve. (See Fig. 19.)
10. Set the room thermostat to a temperature slightly
above the room temperature. This will automatically
signal the furnace to start. The inducer motor will start,
and the hot surface ignitor will energize. When hot, the
ignitor will have an orange glow.
11. After 15 to 70 sec, the gas valve permits gas toflow to
the main burners where it is ignited. Hotflames begin
to warm the furnace’s heat exchanger.After a time
delay of approximately 45 sec, the furnace blower is
switched on.
NOTE: If the main burners fail to ignite, the furnace control
system will go through 3 more ignition cycles. If burners
still fail to ignite, the system will lockout. (Under some cir-
cumstances the furnace may reset from lockout and attempt
to ignite if a call for heat still exists.) If lockout occurs or the
blower does not come on, refer to the shutdown procedures
on the furnace or see “Shutting DownYour Furnace”section
in this manual, and call your dealer for service.
12. Set your thermostat to the temperature that satisfies
your comfort requirements. SUGGESTION: Setting
the thermostat back a few degrees and compensating
for the difference with warmer clothing can make a big
difference in your fuel consumption. The few degrees
at the top of your thermostat “comfort level’’ are the
most costly degrees to obtain.
When the room temperature drops below the temperature
selected on the thermostat, the furnace will switch on auto-
matically. When the room temperature reaches the setting
selected on the thermostat, the furnace will automatically
switch off.
Some thermostats have a “FAN’’ switch with 2 selections,
AUTOandON.WhenthermostatissetonAUTO,thefurnace
blowercyclesonand off,controlledbythe thermostat. InON
position, the furnace blower runs continuously
except for a 77-sec delay at the“call for heat.’’This keeps the
temperature level in your home more evenly balanced.
It also continuously filters the indoor air. When the FAN
switch is moved from ON toAUTO, the furnace blower will
continue running for 90 sec before stopping.
SHUTTING DOWN YOUR FURNACE
Should you ever suspect a malfunction in your furnace, you
will need to turn the furnace off. The following procedures
must be followed:
1. Set your room thermostat to the lowest temperature
setting. (See Fig. 20.)
2. Close the manual gas valve that is located outside of the
furnace cabinet. (See Fig. 8.)
3. Turn off electrical power to your furnace. (See Fig. 21.)
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