Carrier GAS FURNACE 58MCA, 58MVP, 58MTA, 58MXA User's Information Manual

MULTIPOISE, CONDENSING 58MCA, 58MTA, 58MVP, 58MXA

GAS FURNACE

USER’S INFORMATION MANUAL FOR OPERATION AND MAINTENANCE OF

YOUR GAS-FIRED FURNACE

NOTE T O INST ALLER:
THIS MANUAL MUST BE LEFT WITH THE
EQUIPMENT USER.

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WARNING:
FIRE OR EXPLOSION HAZARD
Failure to f ollo w safety warnings exactly could result in
serious injury, death, or property damage.

— 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.

• Leave the building immediately.

• Immediately call your gas supplier from a neigh­bor’s phone. F ollo w the gas supplier’s instructions.

USER: Please read all instructions in
the manual and retain all manuals for
future reference.

• 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.

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WARNING:

Carbon Monoxide is invisible, odorless, and toxic!
Carrier Corporation recommends a carbon mon­oxide alarm in your home, even if you do not own
a gas appliance. Locate the carbon monoxide
alarm in the living area of your home and away
from gas appliances and doorways to attached
garages. Follow the alarm manufacturer’ s instruc­tion included with the alarm.

Do not use this furnace if any part has been
under water. A flood-damaged furnace is
extremely dangerous. Attempts to use the
furnace can result in fire or explosion. A
qualified service agency should be contacted
to inspect the furnace and to replace all gas
controls, control system parts, electrical
parts that have been wet or the furnace if
deemed necessary.

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TABLE OF CONTENTS

WELCOME TO A NEW GENERATION OF COMFORT . . . . . . .2

GENERAL FURNACE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

FURNACE COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

BEFORE STARTING YOUR FUR NACE . . . . . . . . . . . . . . . . . . . . . . .4

STARTING AND SHUTTING DOWN YOUR FURNACE . . . . . . .4

Steps for Starting Your Furnace. . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Shutting Down Your Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

PERF ORMING ROUTINE MAINTENANCE . . . . . . . . . . . . . . . . . . .6

Filtering Out Trouble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

COMBUSTION AREA AND VENT SYSTEM . . . . . . . . . . . . . . . . . . .8

Heading South for the Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

A CHECK-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10

BEFORE YOU REQUEST A SERVICE CALL . . . . . . . . . . . . . . . . .10

INSTALLATION DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

WELCOME TO A NEW GENERATION
OF COMFORT

Congratulations! In light of rising energy costs, the 58MXA,
58MCA, 58MTA, and WeatherMaker Infinity, Multipoise, Gas­Fired Condensing Furnaces are among the soundest investments
today’s homeowner can make.

Your new furnace is truly a triumph of technology in home heat­ing. A revolutionary design employs 2 heat exchangers to
“squeeze” out the maximum amount of heat from the fuel con­sumed. In fact, your new furnace is so ef ficient, o ver 90%* of the
heat generated during combustion is captured and deli vered inside
your home. That is more than a 33%* increase in heating effi­ciency over conventional furnaces.

These are among the most energy-ef ficient furnaces you can b uy to­day. They also are among the safest and most dependable. We are
proud of the technological advances incorporated into the design of
these furnaces. W ith only minimal care, your new furnace will deli ver
many years of money-saving home comfort and enjoyment. Spend
just a few minutes with this manual to learn the operation of your ne w
furnace and the small amount of maintenance it takes to help keep it
operating at peak efficiency year after year.

*The output capacity and any representations of efficiency for this furnace are based on standard
U.S. Department of Energy test procedures.

CERTIFIED

As an ENERGY STAR®
partner, Carrier Corporation
has determined that this
product meets the ENERGY
STAR® guidelines for
energy efficiency.

15. Freeze Damage Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7,9

16. Loud Noise Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

17. Antifreeze Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

MODELS 58MXA (SHOWN) AND
58MCA FIXED-CAPACITY FURNACES

1

GENERAL FURNACE SAFETY

1. Combustible Materials, Gasoline Warning . . . . . . . . . . . . . . . . . 1,4

2. Furnace Must be Kept Free and Clear of Insulating

Material War ning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3. Furnace Needs Air f or Comb ustion and Ventilation W arning . . .4

4. Starting (Lighting) and Shutting Down the

Furnace W arning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

5. Proper Furnace Shutdown Procedur es . . . . . . . . . . . . . . . . . . . . . . .5

6. Flood Damage W ar ning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

7. Fire or Explosion Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . . . .1

8. Carbon Monoxide W ar ning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

9. Service and Maintenance Electrical Hazard Warning . . . . . . . . . .7

10. Improper V ent W arning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

11. Sharp Edges Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

12. No Filter Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

13. Filter Rod Modification Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

14. Dirt, Rust, or Accumulation Caution . . . . . . . . . . . . . . . . . . . . . . . .9

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MODEL 58MVP
VARIABLE-CAP ACITY
AND MODEL 58MTA
TWO-STAGE FURNA CES

2

FURNACE COMPONENTS

1

Combustion-air intake connection to ensure contami­nant-free air (right or left side).

2

Burner sight glass for viewing burner flame.

3

Burner assembly (inside). Operates with energy-saving
inshot burners and hot surface igniter for safe,
dependable heating.

4

Redundant gas valve. Safe and efficient. Features 1 gas
control with 2 internal shutoff valves. Valve appearance
varies with furnace model.

5

Vent outlet. Uses PVC pipe to carry flue gas from the fur­nace’s combustion system (right or left side).

6

Inducer motor. Pulls hot flue gases through the heat ex­changers, maintaining negative pressure for added safety.

7

Blower access panel safety interlock switch.

8

Air filter and retainer.

9

Condensate drain connection. Collects moisture con­densed from burned gases for disposal into home drain
system. (Location in furnace varies.)

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need art

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Heavy-duty blower. Circulates air across the heat ex­changers to transfer heat into the home.

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Secondary condensing heat exchanger (inside). Wrings
out more heat through condensation. Constructed with
polypropylene-laminated steel to ensure durability.

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Primary serpentine heat exchanger (inside). Stretches fuel
dollars with the S-shaped heat-flow design. Solid con­struction of corrosion-resistant aluminized steel means re­liability.

13

Furnace control board.

14

3-amp fuse provides electrical and component protection.

15

Light emitting diode (LED) on furnace control board.
Code light is for diagnosing furnace operation and service
requirements.

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Pressure switch(es) ensure adequate flow of flue gas
through furnace and out vent system.

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Rollout switch (manual reset) to prevent overtemperature.

18

Junction box for 115-v electrical power supply. (May be
located on right or left side)

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Transformer (24v) behind furnace control board pro­vides low-voltage power to furnace control board and
thermostat.

MODELS 58MXA, 58MCA, AND 58MTA
FURNACES (UPFLOW POSITION)

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16

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19
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MODEL 58MVP
FURNACE (UPFLOW POSITION)

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SAFETY CONSIDERATIONS

Recognize safety information. This is the safety-alert sym-

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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,
CAUTION and NOTE. DANGER, WARNING and
CAUTION are used with the safety-alert symbol. DANGER
identifies the most serious hazards which
personal injury or death. WARNING signifies hazards which

could result in personal injury or death. CAUTION is used

to identify unsafe practices which
sonal injury or product and property damage. NOTE is used
to highlight suggestions which
lation, reliability or operation.

To minimize the possibility of serious personal injury, fire,
furnace damage, or improper operation;

these safety rules:

•Your gas furnace uses air from outside the home for com­bustion and vents flue gas to the outdoors. It is not to be
installed using indoor air for combustion. The vent and air­intake pipes must terminate outside the structure and must
not be obstructed in any way. Do not block or obstruct air
openings on furnace or spaces around the furnace.

will result in enhanced instal-

will result in severe

would result in minor per-

carefully follow

• Do not cover the furnace, store trash or debris near it, or
in any way block the flow of fresh air to the unit.

• A furnace installed in an attic or other insulated space must
be kept free and clear of insulating material. Examine the fur­nace area when the furnace is installed or when insulation is
added. Some materials may be combustible.

This furnace contains SAFETY DEVICES which must be
MANUALLY RESET. If the furnace is left unattended for
an extended period of time, have it checked periodically for
proper operation. 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.

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WARNING

Fire Hazard! Failure to keep insulation clear of
furnace could result in fire, personal injury/death
or property damage.

!

WARNING

Do not keep combustible materials, gasoline, and
other flammable liquids or vapors around your
furnace. Failure to follow this warning could result
in fire, personal injury/death or property damage.

• Keep the area around your furnace clear and free of com­bustible materials, gasoline, and other flammable liquids and
vapors.

!

WARNING

For proper and safe operation the furnace needs
air for combustion and ventilation. Do not block
or obstruct the openings on the furnace, air
openings to the area in which the furnace is in­stalled, and the space around the furnace. Failure
to follow this warning could result in fire, personal
injury/death or property damage.

BEFORE STARTING YOUR FURNACE

Examine the furnace installation to determine that:

1. All flue gas carrying areas external to the furnace
(i.e. chimney, vent connector) are clear and free of
obstructions.

2. The vent connector is in place, slopes upward and is phys-

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ically sound without holes or excessive corrosion.

3. The return-air duct connection(s) is physically sound, is
sealed to the furnace casing, and terminates outside the
space containing the furnace.

4. The physical support of the furnace is sound without sag­ging cracks, gaps, etc. around the base.

5. There are no obvious signs of deterioration of the furnace.

6. The pilot and burner flames are in good adjustment (by
comparison with pictorial sketches or drawings of the
main burner flame and, if applicable, the pilot burner
flame).

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