Carrier 58MVC User Manual
I n f i n i t y I C S --- M o d e l 5 8 M V C , D i r e c t V e n t 4 --- W a y M u l t i p o i s e
Condensing Gas Furnace With IdealComfortt IdealHumidit yt
Service and Maintenance Procedures
NOTE: Read the entire instruction manual before starting the
installation.
!
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow warnings could result in personal injury,
death, or property damage.
Improper servicing could result in dangerous operation,
serious injury, death, or property damage.
--Before servicing, disconnect all electrical power to
furnace.
--When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
--Verify proper operation after servicing.
!
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in property
damage, personal injury, or death.
The ability to properly perform maintenance on this
equipment requires certain expertise, mechanical skills,
tools, and equipment. If you do not possess these, do not
attempt to perform any maintenance on this equipment
other than those procedures recommended in the User’s
Manual.
As an ENERGY STAR® Pa rtner,
Carrier Co rporati on has determined
that this product meets the ENERGY
STAR® guidelines for energy efficiency.
SAFETY CONSIDERATIONS
Recognize safety information. This is the safety--alert symbol
. When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety--alert symbol. 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 may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
Untrained personnel can perform basic maintenance functions
described in User’s Information Manual such as cleaning and
replacing air filters. All other operations must be performed by
trained service personnel. When working on heating equipment,
observe precautions in the literature, on tags, and on labels
attached to or shipped with the unit and other safety precautions
that may apply.
ama
CERTIFIED
ISO 9001:2000
REGISTERED
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Never store anything on, near, or in contact with the
furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners, or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning
compounds, plastic or plastic containers, gasoline, kerosene,
cigarette lighter fluid, dry cleaning fluids, or other volatile
fluids.
3. Paint thinners and other painting compounds, paper bags,
or other paper products.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Be careful of sharp metal edges, etc. Use care and wear
protective clothing, gloves, and safety glasses when
removing parts.
Installing and servicing heating equipment can be hazardous due
to gas and electrical components. Only trained and qualified
service agency personnel should install, repair, or service heating
equipment.
Follow all safety codes including the National Fuel Gas Code
(NFGC) NFPA 54--2006/ANSI Z223.1 -- 2006 in the USA, CSA
B149.1--05 National Standard of Canada, Natural Gas and
Propane Installation Codes (NSCNGPIC) in Canada, and the
Installation Standards, Warm Air Heating and Air Conditioning
Systems (NFPA 90B) ANSI/NFPA 90B. Wear safety glasses and
work gloves. Have a fire extinguisher available during start--up
and adjustment procedures and service calls.
1
58MVC
Fig. 1 -- Multipoise Furnace in Upflow Orientation
GENERAL
This furnace can be installed as a direct vent (2--pipe) or an
optional ventilated combustion air condensing gas furnace. These
instructions are written as if the furnace is installed in an upflow
application. An upflow furnace application is where the blower is
located below the combustion and controls section of the furnace,
and conditioned air is discharged upward. Since this furnace can
be installed in any of the 4 positions shown in Fig. 2, you may
need to revise your orientation to component location
accordingly.
AIRFLOW
UPFLOW
AIRFLOW
HORIZONTAL
LEFT
Fig. 2 -- Multipoise Orientation
DOWNFLOW
AIRFLOW
HORIZONTAL
RIGHT
A05085
AIRFLOW
A93041
ELECTROSTATIC DISCHARGE (ESD)
PRECAUTIONS
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may damage furnace
components.
Failure to follow this caution may damage furnace
components. Electrostatic discharge can affect electronic
components. Take precautions during furnace installation
and servicing to protect the furnace electronic control.
Precautions will prevent electrostatic discharges from
personnel and hand tools which are held during the
procedure. These precautions will help to avoid exposing
the control to electrostatic discharge by putting the furnace,
the control, and the person at the same electrostatic
potential.
1. Disconnect all power to the furnace. DO NOT TOUCH
THE CONTROL OR ANY WIRE CONNECTED TO
THE CONTROL PRIOR TO DISCHARGING YOUR
BODY’S ELECTROSTATIC CHARGE TO GROUND.
2. Firmly touch a clean, unpainted, metal surface of the
furnace chassis which is close to the control. Tools held in
a person’s hand during grounding will be satisfactorily
discharged.
3. After touching the chassis, you may proceed to service the
control or connecting wires as long as you do nothing that
recharges your body with static electricity (for example;
DO NOT move or shuffle your feet, DO NOT touch
ungrounded objects, etc.).
4. If you touch ungrounded objects (recharge your body with
static electricity), firmly touch furnace again before
touching control or wires.
5. Use this procedure for installed and uninstalled
(ungrounded) furnaces.
6. Before removing a new control from its container,
discharge your body’s electrostatic charge to ground to
protect the control from damage. If the control is to be
installed in a furnace, follow items 1 through 5 before
bringing the control or yourself into contact with the
furnace. Put all used AND new controls into containers
before touching ungrounded objects.
7. An ESD service kit (available from commercial sources)
mayalsobeusedtopreventESDdamage.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible
furnace failure, it is essential that maintenance be performed
annually. Consult your local dealer for maintenance and
maintenance contract availability.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off the gas and electrical supplies to the unit before
performing any maintenance or service. Follow the
operating instructions on the label attached to the furnace.
2
WASHABLE
FILTER
FILTER
SUPPORT
FILTER
RETAINER
WASHABLE FILTER OR
DISPOSABLE MEDIA FILTER
IN FILTER CABINET
Fig. 3 -- Bottom Filter Arrangement
A00232
WASHABLE
FILTER
IN FURNACE
WASHABLE FILTER OR
DISPOSABLE MEDIA
FILTER IN FILTER CABINET
Fig. 4 -- Filter Installed for Side Inlet
FILTER
RETAINER
A00233
58MVC
The minimum maintenance that should be performed on this
equipment is as follows:
1. Check and clean or replace air filter each month as needed.
2. Check blower motor and wheel for cleanliness annually.
3. Check electrical connections for tightness and controls for
proper operation each heating season. Service as
necessary.
4. Check for proper condensate drainage. Clean as necessary.
5. Check for blockages in combustion--air and vent pipes
annually.
6. Check burners for cleanliness annually.
A. CLEANING AND/OR REPLACING AIR FILTER
The air filter arrangement may vary depending on the application
or orientation.
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
Never operate unit without a filter or with the blower access
panel removed. Operating a unit without a filter or with the
blower access door removed could cause damage to the
furnace blower motor. Dust and lint on internal parts of
furnace can cause a loss of efficiency.
NOTE: If the filter has an airflow direction arrow, the arrow
must point toward the blower.
To clean or replace filters, proceed as follows:
If filter is installed in filter cabinet adjacent to furnace:
1. Turn off electrical supply to furnace.
2. Remove filter cabinet door.
3. Slide filter out of cabinet.
4. If equipped with permanent, washable filter, clean filter by
spraying cold tap water through filter in opposite direction
of airflow. Rinse filter and let dry. Oiling or coating of the
filter is not recommended.
5. If equipped with factory specified disposable media filter,
replace only with a factory specified media filter of the
same size.
6. Slide filter into cabinet.
7. Replace filter cabinet door.
8. Turn on electrical supply to furnace.
If filter is installed in furnace blower compartment:
1. Turn off electrical supply to furnace.
2. Remove main furnace door and blower access panel.
3. Release filter retainer wire. (See Fig. 3 or 4.)
NOTE: Filters shown in Fig. 3 and 4 can be in furnace blower
compartment or in filter cabinet, but not in both.
4. Slide filter out of furnace.
5. Furnaces are equipped with permanent, washable filter(s).
Clean filter by spraying cold tap water through filter in
opposite direction of airflow.
6. Rinse filter and let dry. Oiling or coating filter is not
recommended.
7. Slide filter into furnace.
8. Recapture filter retaining wire.
9. Replace blower access panel and main furnace door.
10. Turn on electrical supply to furnace.
B. BLOWER MOTOR AND WHEEL MAINTENANCE
To ensure long life, economy, and high efficiency, clean
accumulated dirt and grease from blower wheel and motor
annually.
The inducer and blower motors are pre--lubricated and require no
additional lubrication. These motors can be identified by the
absence of oil ports on each end of the motor.
The following items should be performed by a qualified service
technician.
3
PLUG
T
COLLECTOR BOX
DRAIN TUBE (BLUE &
WHITE STRIPED)
CAP
COLLECTOR BOX
TUBE (PINK)
INDUCER HOUSING
(MOLDED) DRAIN
UBE (BEHIND
COLLECTOR BOX
DRAIN TUBE)
COLLECTOR BOX
DRAIN TUBE (BLUE)
COLLECTOR BOX
TUBE (GREEN ,
ROUTES BEHIND
INDUCER)
CONDENSATE
FIELD- INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE
COUPLING (LEFT
58MVC
DRAIN OPTION)
FIELD- INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE
FIELD- INSTALLED
FACTORY- SUPPLIED
½ - IN. CPVC STREET
ELBOWS (2) FOR
LEFT DRAIN OPTION
FIELD- INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE
COUPLING (LEFT
DRAIN OPTION)
A07274
Fig. 5 -- Factory--Shipped Upflow Tube Configuration (Shown with Blower Access Panel Removed)
Clean blower motor and wheel as follows:
1. Turn off electrical supply to furnace.
2. Remove main furnace door and blower access panel.
3. Disconnect wires
All factory wires can be left connected, but field
thermostat connections may need to be disconnected
depending on their length and routing.
4. Position control box, transformer, and door switch
assembly to right side of furnace casing.
5. If condensate trap is located in left-- or right--hand side of
furnace casing, proceed to item 6. Otherwise remove trap
and tubing as described below (See Fig. 5.):
a. Disconnect field drain connection from condensate trap.
b. Disconnect drain and relief port tubes from condensate
trap.
c. Remove condensate trap from blower shelf.
6. Remove screws securing blower assembly to blower shelf
and slide blower assembly out of furnace. Detach ground
wire and disconnect blower motor harness plugs from
blower motor.
NOTE: Blower wheel is fragile. Use care.
7. Clean blower wheel and motor by using a vacuum with
soft brush attachment. Be careful not to disturb balance
weights (clips) on blower wheel vanes. Do not bend wheel
or blades as balance will be affected.
8. If greasy residue is present on blower wheel, remove
wheel from the blower housing and wash it with an
appropriate degreaser. To remove wheel:
a. Mark blower wheel location on shaft before disassembly
to ensure proper reassembly.
b. Loosen setscrew holding blower wheel on motor shaft.
NOTE: Mark blower mounting arms and blower housing so
each arm is positioned at the same hole location during
reassembly.
c. Mark blower wheel orientation and cutoff plate location
to ensure proper reassembly.
d. Remove screws securing cutoff plate and remove cutoff
plate from housing.
e. Remove bolts holding motor mounts to blower housing
and slide motor and mounts out of housing.
f. Remove blower wheel from housing.
g. Cleanwheelper instructionson degreaser cleaner.Do not
get degreaser in motor.
9. Reassemble motor and blower wheel by reversing items
8b through 8f. Ensure wheel is positioned for proper
rotation.
NOTE: Be sure to attach ground wire and reconnect blower
harness plugs to blower motor.
10. Reinstall blower assembly in furnace.
11. Reinstall condensate trap and tubing if previously
removed.
a. Reinstall condensate trap in hole in blower shelf.
b. Connect condensate trap drain tubes. See Fig. 5 or tubing
diagram on main furnace door for proper tube location.
(1.) Connect 1 tube (blue or blue and white striped)from
collector box.
(2.) Connect 1 tube (violet or unmarked) from inducer
housing.
(3.) Connect one tube (relief port, green or pink) from
collector box.
c. Connect field drain to condensate trap.
NOTE: Ensure tubes are not kinked or pinched, as this will
affect operation.
12. Reinstall control box, transformer, and door switch
assembly on blower shelf.
13. Reconnect wires.
a. Refer to furnace wiring diagram and connect thermostat
leads if previously disconnected. (See Fig. 21.)
4
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Blower access panel door switch opens 115--v power to
furnace control. No component operation can occur.
Caution must be taken when manually closing this switch
for service purposes.
12. Remove burner assembly from burner box. NOTE: All
burners are attached to burner bracket and can be removed
as 1 assembly.
13. Clean burners with soft brush and vacuum.
14. Reinstall manifold, orifice, and gas valve assembly in
burner box. Ensure manifold seal grommet is installed
properly and burners fit over orifices.
15. Reinsert the igniter wires in the slot in the manifold
grommet, dressing the wires to ensure there is no tension
on the igniter itself. (See Fig. 7.)
14. Turn on electrical supply. Manually close blower access
panel door switch. Use a piece of tape to hold switch
closed. Check for proper rotation and speed changes
between heating and cooling by jumpering R to G and R
to Y/Y2 on furnace control thermostat terminals. (See Fig.
15.)
15. If furnace is operating properly, release blower access
panel door switch, replace blower access panel, and
replace main furnace door.
C. CLEANING BURNERS
The following items should be performed by a qualified service
technician. If the burners develop an accumulation of light dirt or
dust, they may be cleaned by using the following procedure:
1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
3. Remove burner box cover.
4. Using backup wrench, disconnect gas supply pipe from
furnace gas control valve.
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in furnace
component damage.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Igniter wires must be securely placed in slot in manifold
grommet or else they could become pinched or severed and
electrically shorted.
16. Reconnect wires to gas valve and igniter. Refer to furnace
wiring diagram for proper wire location.
17. Reinstall burner box pressure tube to gas valve regulator
fitting.
18. Reinstall gas supply pipe to furnace gas control valve
using backup wrench on gas valve to prevent rotation and
improper orientation.
CELL
PANEL
MANIFOLD
MOUNTING
SCREWS
58MVC
5. Remove wires from gas valve. Note location for
reassembly.
6. Remove burner box pressure tube from gas valve regulator
fitting.
7. Unplug igniter from harness.
8. Remove igniter leads from slot in manifold grommet.
9. Remove screws that secure manifold to burner box. (See
Fig. 6.)
NOTE: Do not remove burner box from cell panel.
10. Remove manifold, orifices, and gas valve as 1 assembly.
11. Remove screws attaching burner assembly in burner box.
NOTE: Use care when removing and reinstalling burners not to
strike the hot surface igniter.
5
GAS
CONTROL
VALVE
GASKET
MANIFOLD
THROTTLING
VALVE
GAS VALVE
REGULATOR
FITTING
A07562
Fig. 6 -- Burner Box Assembly
PRIMARY HX
INLET OPENINGS
58MVC
IGNIT ER WIRES MUST
BE PLACED IN THIS SLOT
Fig. 7 -- Igniter Wire Placement
A05074
Fig. 8 -- Cleaning Inlet Openings of
Primary Heat Exchangers
A96305
RTV
PAM
A93087
Fig. 9 -- Combustion--air Intake
Housing Gasket Repair
6
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