58MEC
D E L U X E 4 --- WAY M U LT I P O I S E 2 --- S TA G E
CONDENSING GAS FURNACE
SIZES 060 TO 120
Service and Maintenance Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Recognize safety information. This is the safety--alert symbol
.
When you see this symbol on the furnace and in instructions or
manuals, be alert to the potential for personal injury.
TABLE OF CONTENTS
Understand the signal words DANGER, WARNING, and
CAUTION. 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 a hazard
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.
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.
PAGE
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS . . . 2
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 3
Cleaning and/or Replacing Air Filter . . . . . . . . . . . . . . . . . . . . 3
Blower Motor and Wheel Maintenance . . . . . . . . . . . . . . . . . . 3
Cleaning Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cleaning Heat Exchangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Primary Heat Exchangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Secondary Heat Exchangers . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Flushing Collector Box and Drainage System . . . . . . . . . . . . . 8
Servicing Hot Surface Igniter . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Controls and Wiring . . . . . . . . . . . . . . . . . . . . . . . . 11
Checking Heat Tape Operation (If Applicable) . . . . . . . . . . . 11
Winterizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Status Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Component Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . 17
!
WARNING
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
HAZARD
Failure to follow this warning could result in personal
injury, death or property damage.
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.
!
WARNING
FIRE OR EXPLOSION HAZARD
!
WARNING
Failure to follow this warning could result in property
damage, personal injury, or death.
ELECTRICAL SHOCK, FIRE, OR EXPLOSION
HAZARD
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.
Failure to follow safety warnings exactly could result in
dangerous operation, personal injury, death, or property
damage.
-- Before servicing, disconnect all electrical power to furnace
and install lock out tag.
--When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
-- Verify proper operation after servicing.
1
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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.
Step 1 — Cleaning and/or Replacing Air Filter
The air filter arrangement may vary depending on the application
or orientation.
information.
See Tables 1 and 2 for filter size and type
2. Firmly touch a clean, unpainted, metal surface of the fur-
nace chassis which is close to the control. Tools held in a
person’s hand during grounding will be satisfactorily dis-
charged.
!
WARNING
FIRE, CARBON MONOXIDE POISONING
HAZARD
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 ungroun-
ded objects, etc.).
Failure to follow this warning could result in personal injury,
death or property damage.
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.
4. If you touch ungrounded objects (recharge your body with
static electricity), firmly touch furnace again before touch-
ing control or wires.
5. Use this procedure for installed and uninstalled (ungroun-
ded) furnaces.
NOTE: If the filter has an airflow direction arrow, the arrow must
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 con-
trol or yourself into contact with the furnace. Put all used
AND new controls into containers before touching un-
grounded objects.
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.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
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.
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.
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.
!
WARNING
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.)
ELECTRICAL SHOCK EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Turn off the gas and electrical supplies to the unit and install
lock out tags before performing any maintenance or service.
Follow the operating instructions on the label attached to the
furnace.
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 op-
posite direction of airflow.
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.
6. Rinse filter and let dry. Oiling or coating filter is not recom-
mended.
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.
4. Check for proper condensate drainage. Clean as necessary.
5. Check for blockages in combustion--air and vent pipes an-
nually.
6. Check burners for cleanliness annually.
Step 2 — Blower Motor and Wheel Maintenance
To ensure long life, economy, and high efficiency, clean
accumulated dirt and grease from blower wheel and motor
annually.
!
CAUTION
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.
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.
The following items should be performed by a qualified service
technician.
Clean blower motor and wheel as follows:
1. Turn off electrical supply to furnace.
2. Remove main furnace door and blower access panel.
3
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Table 1 – Furnace Air Filter Table
FILTER QUANTITY AND SIZE *
FURNACE CASING WIDTH
IN (MM)
FILTER TYPE
IN (MM)*
SIDE RETURN{*
BOTTOM RETURN*
IN (MM)
IN (MM)
(1) 16 x 25 x 3/4 {
(406 x 635 x 19) {
(1) 16 x 25 x 3/4
(406 x 635 x 19)
(1) 16 x 25 x 3/4
(406 x 635 x 19)
(1) 16 x 25 x 3/4
(406 x 635 x 19)
(1) 20 x 25 x 3/4 {
(508 x 635 x 19) {
(1) 24 x 25 x 3/4 {
(610 x 635 x 19) {
17---1/2 (445)
21 (533 )
3/4 (19 mm) thick washable
3/4 (19 mm) thick washable
3/4 (19 mm) thick washable
24---1/2 (610)
Table 2 – Air Filter Located in Filter Cabinet
FILTER CABINET HEIGHT --- IN (MM)
F I LT E R S I Z E --- I N ( M M )
FILTER TYPE
(1) 16 x 25 x 3/4*
(406 x 635 x 19) or
(1) 16 x 25 x 4---5/16
(406 x 635 x 110)
16 (406)
Washable
(1) 20 x 25 x 3/4*
(508 x 635 x 19) or
(1) 20 x 25 x 4---5/16
(508 x 635 x 110)
(1) 24 x 25 x 3/4*or
(610 x 635 x 19) or
(1) 24 x 25 x 4---5/16
(610 x 635 x 110)
20 (508)
24 (610)
Washable
Washable
* Filters with a side return--air may have a different filter size. Measure the filter to
NOTE: Blower wheel is fragile. Use care.
obtain the correct size.
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.
{
Factory--provided with furnace.
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.
WASHABLE
FILTER
NOTE: Mark blower mounting arms and blower housing so each
arm is positioned at the same hole location during reassembly.
FILTER
SUPPORT
c. Mark blower wheel orientation and cutoff plate location
to ensure proper reassembly.
FILTER
RETAINER
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. Disconnect
capacitor and ground wire attached to blower housing
before removing motor. Motor mounts do not need to
be removed from motor.
WASHABLE FILTER OR
DISPOSABLE MEDIA FILTER
IN FILTER CABINET
A00232
Fig. 3 -- Bottom Filter Arrangement
f. Remove blower wheel from housing.
WASHABLE
FILTER
IN FURNACE
3. Disconnect blower motor wires from furnace control. Field
thermostat connections may need to be disconnected de-
pending on their length and routing.
FILTER
RETAINER
4. Remove control box mounting screws and 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.
WASHABLE FILTER OR
DISPOSABLE MEDIA
c. Remove condensate trap from blower shelf.
FILTER IN FILTER CABINET
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.
A00233
Fig. 4 -- Filter Installed for Side Inlet
4
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(1.) Connect 1 tube (blue or blue and white striped)
from collector box.
(2.) Connect 1 tube (violet or unmarked) from inducer
housing.
PLUG
CAP
(3.) Connect 1 tube (relief port, green or pink) from
collector box.
COLLECTOR BOX
DRAIN TUBE (BLUE
& WHITE STRIPED)
NOTE: Ensure tubes are not kinked or pinched, as this will affect
operation.
c. Connect field drain to condensate trap.
13. Reconnect wires.
COLLECTOR BOX
TUBE (PINK)
Refer to furnace wiring diagram and connect thermostat leads if
previously disconnected. (See Fig. 16.)
NOTE: Refer to Table 3 for motor speed lead reconnection if
COLLECTOR BOX
TUBE (GREEN)
leads were not identified before disconnection.
INDUCER HOUSING
(MOLDED) DRAIN
TUBE (BEHIND
COLLECTOR BOX
DRAIN TUBE)
!
CAUTION
UNIT DAMAGE HAZARD
Failure follow this caution may result in unit component
damage.
COLLECTOR BOX
DRAIN TUBE (BLUE)
CONDENSATE
TRAP
Heating air speed selection MUST be adjusted to provide
proper temperature rise as specified on the rating plate.
FIELD-INSTALLED
FACTORY-SUPPLIED
DRAIN TUBE
COUPLING (LEFT
DRAIN OPTION)
Table 3 – Speed Selection
FACTORY
ATTACHED TO
Cool
Spare
High---Heat
Spare
COLOR
SPEED
FIELD-INSTALLED
FACTORY-SUPPLIED
DRAIN TUBE
Gray
Yellow
Blue
5
4
3
2
FIELD-INSTALLED
FIELD-INSTALLED
FACTORY-SUPPLIED
DRAIN TUBE
COUPLING (RIGHT
DRAIN OPTION)
FACTORY-SUPPLIED
Orange
1
⁄
2-IN. CPVC STREET
ELBOWS (2) FOR
Low Heat/Cont
Fan
Red
1
LEFT DRAIN OPTION
A01030
Fig. 5 -- Factory--Shipped Upflow Tube Configuration
(Shown with Blower Access Panel Removed)
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
!
CAUTION
Blower access 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.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in noise or furnace
component failure.
The blower wheel should not be dropped or bent as balance
will be affected.
14. Turn on electrical supply. Manually close blower access
door switch. Use a piece of tape to hold switch closed.
Check for proper rotation and speed changes by performing
a component self--test as shown at the bottom of Service la-
bel. (See Fig. 21.)
g. Clean wheel per instructions on 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.
Tighten setscrew to between 140--160 in.--lb torque.
15. If furnace is operating properly, remove tape to release
blower access door switch, replace blower access door, and
replace main furnace door.
NOTE: Be sure to attach ground wire to blower housing.
Step 3 — 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:
10. Reinstall blower assembly in furnace.
11. Reinstall control box, transformer, and door switch as-
sembly on blower shelf.
12. Reinstall condensate trap and tubing if previously removed.
a. Reinstall condensate trap in hole in blower shelf.
1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
b. Connect condensate trap drain tubes. See Fig. 5 or
tubing diagram on main furnace door for proper tube
location.
3. Remove burner box cover.
4. Using backup wrench, disconnect gas supply pipe from fur-
nace gas control valve.
5
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!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to furnace.
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
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.
IGNITER WIRES MUST
BE PLACED IN THIS SLOT
NOTE: Use care when removing and reinstalling burners not to
strike the hot surface igniter.
A05074
Fig. 7 -- Igniter Wire Placement
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.
!
CAUTION
14. Reinstall burner assembly, 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 grom-
met, dressing the wires to ensure there is no tension on the
igniter itself. (See Fig. 7.)
UNIT COMPONENT ELECTRICAL SHORT HAZARD
Failure to follow this caution may result in unit component
damage.
Igniter wires must be securely placed in slot in manifold
grommet or else they could become pinched or severed and
electrically shorted.
CELL
PANEL
MANIFOLD
MOUNTING
SCREW
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 fit-
ting.
18. Reinstall gas supply pipe to furnace gas control valve using
backup wrench on gas valve to prevent rotation and im-
proper orientation.
NOTE: Use propane gas resistant pipe dope to prevent gas leaks.
DO NOT use Teflon tape.
!
WARNING
MANIFOLD
FIRE, EXPLOSION, UNIT DAMAGE HAZARD
GAS VALVE
REGULATOR
FITTING
Failure to follow this warning could result in property damage,
personal injury, or death.
Gas valve switch MUST be facing forward or tilted upward.
GAS VALVE
A96304
Fig. 6 -- Burner Box Assembly
19. Replace burner box cover.
20. Turn on gas and electrical supplies to furnace.
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for the
detection of leaks to check all connections.
6
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21. Check for gas leaks.
9. Remove 2 screws attaching top filler panel and rotate up-
wards to gain access to screws attaching burner box to cell
panel.
22. Replace main furnace door.
Step 4 — Cleaning Heat Exchangers
The following items should be performed by a qualified service
technician.
10. Remove screws attaching burner box to cell panel. (See Fig.
6).
NOTE: Burner box, cover, manifold, gas valve, and burner
assembly should be removed as one assembly.
PRIMARY HEAT EXCHANGERS
If the heat exchangers get an accumulation of light dirt or dust on
the inside, they may be cleaned by the following procedure:
11. Clean heat exchanger openings with a vacuum and a soft
brush. (See Fig. 8.)
NOTE: If heat exchangers get a heavy accumulation of soot and
carbon, both the primary and secondary heat exchangers should be
replaced rather than trying to clean them thoroughly due to their
intricate design. A build--up of soot and carbon indicates that a
problem exists which needs to be corrected, such as improper
adjustment of manifold pressure, insufficient or poor quality
combustion air, improper vent termination, incorrect size or
damaged manifold orifices(s), improper gas, or a restricted heat
exchanger (primary or secondary). Action must be taken to correct
the problem.
NOTE: After cleaning, inspect the heat exchanger to ensure they
are free of all foreign objects that may restrict flow of combustion
products.
12. Reverse items 4 through 10 for reassembly.
!
CAUTION
UNIT MAY NOT OPERATE
Failure to attach this ground wire to an adequate casing
ground may cause the furnace control to lock out.
1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
The ground wire from the gas valve MUST be attached to the
burner box attachment screw.
!
CAUTION
NOTE: Be sure burner box gasket is installed between burner box
UNIT DAMAGE HAZARD
and cell panel. (See Fig. 6.) If gasket is damaged, replace it.
Failure to follow this caution may result in furnace component
damage.
NOTE: Inspect combustion--air intake housing. If foamed gasket
was removed, check for any damage. If gasket is damaged in any
way, it must be repaired. To repair, remove damaged gasket
section, apply sealant releasing agent such as PAM cooking spray
or equivalent (must not contain corn nor canola oil, halogenated
hydrocarbons nor aromatic content, to prevent inadequate seal
from occurring) to burner box and apply a small bead of G.E. RTV
162, G.E. RTV 6702, or Dow--Corning RTV 738 sealant to edge
of combustion--air intake housing. (See Fig. 9.)
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and hazardous operation.
3. Disconnect wires or connectors to flame rollout switch, gas
valve, igniter, and flame sensor.
4. Disconnect combustion-air intake pipe from intake housing.
5. Remove the pressure switch tube from intake housing.
6. Remove screws attaching intake housing to burner box, and
13. Refer to furnace wiring diagram and reconnect wires to
flame rollout switch, gas valve, igniter, and flame sensor.
rotate intake housing away from burner box for removal.
14. Reconnect pressure switch tubes to gas valve and intake
housing. Refer to tube routing label on main furnace door
or Fig. 10 for proper tube location. Be sure tubes are not
kinked.
7. Using backup wrench, disconnect gas supply pipe from fur-
nace gas control valve.
8. Disconnect pressure tubing from gas valve.
15. Turn on gas and electrical supplies to furnace.
PRIMARY HX
INLET OPENINGS
16. Check furnace operation through 2 complete heat operating
cycles. Look through sight glass in burner enclosure to
check burners. Burner flames should be clear blue, almost
transparent. (See Fig. 11.)
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this safety warning could result in personal
injury, death, or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for the
detection of leaks to check all connections.
17. Check for gas leaks.
18. Replace main furnace door.
A96305
Fig. 8 -- Cleaning Inlet Openings of Primary
Heat Exchangers
SECONDARY HEAT EXCHANGERS
NOTE: The condensing side (inside) of the secondary heat
exchangers CANNOT be serviced or inspected. A small number
of bottom outlet openings can be inspected by removing the
7
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inducer assembly. See Flushing Collector Box and Drainage
System section for details on removing inducer assembly.
inducer housing. Apply a small bead of G.E. RTV 162, G.E. RTV
6702, or Dow--Corning RTV 738 sealant to groove in collector
box. (See Fig. 12.)
Step 5 — Flushing Collector Box and Drainage
System
11. Refer to furnace wiring diagram and reconnect wires to in-
ducer motor and pressure switches or connectors.
1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
12. Reconnect pressure tubes to pressure switches. See diagram
on main furnace door for proper location of tubes. Be sure
tubes are not kinked. (See Fig. 10.)
3. Disconnect inducer motor and pressure switch wires or con-
nectors.
13. Turn on gas and electrical supplies to furnace.
4. Disconnect pressure switch tubes.
5. Disconnect vent pipe from inducer housing outlet by
14. Check furnace operation through 2 complete heat operating
cycles. Check area below inducer housing, vent pipe, and
condensate trap to ensure no condensate leaks occur. If
leaks are found, correct the problem.
loosening coupling clamp on inducer outlet.
6. Disconnect drain tube from inducer housing. (See Fig. 10.)
NOTE: Ensure the drain tube disconnected from the inducer
housing is higher than the collector box opening or water will flow
out of tube.
!
WARNING
FIRE OR EXPLOSION HAZARD
7. Remove inducer housing assembly by removing 4 bolts at-
taching assembly to cell panel.
Failure to follow this warning could result in personal injury,
death, or property damage.
8. Flush inside of collector box with water until discharge
from condensate trap is clean and runs freely.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for the
detection of leaks to check all connections.
9. Inspect inside area of collector box for any pieces of foreign
materials and remove them if present.
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in furnace component
damage.
RTV
DO NOT use wire brush or other sharp object to inspect or
dislodge materials in secondary heat exchangers as cutting the
secondary heat exchanger protective coating may occur. Flush
with water only.
PAM
10. Reassemble inducer assembly by reversing items 5-7. Tight-
en vent coupling clamp screw(s) to 15 in.-lb of torque.
A93087
Fig. 9 -- Combustion-Air Intake Housing
Gasket Repair
NOTE: If seal between the inducer housing and the collector box
is damaged in any way, it must be repaired. To repair, apply
sealant releasing agent such as PAM cooking spray or equivalent
(must not contain corn nor canola oil, halogenated hydrocarbons
nor aromatic content, to prevent inadequate seal from occurring) to
15. Check for gas leaks.
16. Replace main furnace door.
8
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TUBE ROUTING
Furnace is shipped from factory in upflow configuration. Pressure tube and drain tube routing MUST match the diagrams below.
Condensate Trap on LEFT
Condensate Trap; Factory Installed
Tube location when used in UPFLOW application
Side Optional
in Blower Shelf
BURNER ENCLOSURE
PRESSURE REFERENCE
TUBE ASSEMBLY
BURNER ENCLOSURE
PRESSURE REFERENCE
TUBE ASSEMBLY
(Blower access panel removed)
CAP
CAP
COLLECTOR BOX TUBE
(PINK)
PLUG
PLUG
COLLECTOR BOX TUBE
COLLECTOR BOX TUBE
(GREEN)
(PINK)
COLLECTOR BOX DRAIN
TUBE
COLLECTOR BOX TUBE (GREEN)
(BLUE & WHITE STRIPED)
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
INDUCER HOUSING (MOLDED) DRAIN TUBE
(BEHIND COLLECTOR BOX DRAIN TUBE)
CONDENSATE TRAP
COLLECTOR BOX DRAIN TUBE
(BLUE)
COLLECTOR BOX DRAIN TUBE
(BLUE)
FIELD-INSTALLED
FACTORY- SUPPLIED
DRAIN TUBE COUPLING
(RIGHT DRAIN OPTION)
CONDENSATE TRAP
FIELD-INSTALLED
INDUCER HOUSING DRAIN TUBE
(VIOLET)
FACTORY-SUPPLIED DRAIN TUBE
COUPLING (LEFT DRAIN OPTION)
FIELD-INSTALLED
FACTORY-SUPPLIED 1/2-IN.
CPVC STREET ELBOWS (2)
FOR LEFT DRAIN OPTION
FIELD-INSTALLED FACTORY-SUPPLIED
DRAIN TUBE
Condensate Trap on
LEFT Side
Condensate Trap on
Tube location when used in DOWNFLOW application
RIGHT Side
T
PLUG
COLLECTOR BOX
DRAIN TUBE (BLUE)
PLUGGED END
CAP
CAP
COLLECTOR BOX DRAIN TUBE
(BLUE)
COLLECTOR BOX DRAIN
TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX
TUBE (GREEN)
COLLECTOR BOX TUBE
(PINK)
PLUG
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX TUBE
(GREEN)
INDUCER HOUSING DRAIN
TUBE (VIOLET)
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR BOX EXTENSION TUBE
BURNER ENCLOSURE PRESSU
REFERENCE TUBE ASSEMBL
COLLECTOR BOX
EXTENSION TUBE
CONDENSATE TRAP
DRAIN TUBE COUPLING
CONDENSATE TRAP
COLLECTOR BOX
TUBE (PINK)
BURNER ENCLOSURE PRESSURE
REFERENCE TUBE ASSEMBLY
DRAIN TUBES ROUTED IN
FRONT OF GAS VALVE
COLLECTOR BOX
EXTENSION DRAIN TUBE
GAS VALVE
INDUCER HOUSING DRAIN TUBE (VIOLET)
Tube location when used on
HORIZONTAL - LEFT application
Tube location when used on
HORIZONTAL - RIGHT application
AUXILIARY "J" BOX
COLLECTOR BOX DRAIN TUBE
COLLECTOR BOX DRAIN TUBE
(BLUE & WHITE STRIPED)
COLLECTOR BOX EXTENSION TUBE
(BLUE)
COLLECTOR BOX TUBE (PINK)
PLUG
CAP
AUXILIARY "J" BOX RELOCATED HERE
PLUG
COLLECTOR BOX
TUBE (GREEN)
BURNER ENCLOSURE
PRESSURE REFERENCE
TUBE ASSEMBLY
INDUCER HOUSING
DRAIN TUBE
(VIOLET)
CAP
COLLECTOR BOX
BURNER ENCLOSURE
PRESSURE REFERENCE
TUBE ASSEMBLY
EXTENSION TUBE
COLLECTOR BOX
DRAIN TUBE (BLUE)
CONDENSATE TRAP
COLLECTOR BOX
EXTENSION TUBE
COLLECTOR BOX
TUBE (GREEN)
DRAIN TUBE
COUPLING
COLLECTOR BOX TUBE (PINK)
RELOCATE TUBE BETWEEN BLOWER
SHELF AND INDUCER HOUSING FOR
060 AND 080 HEATING INPUT
FURNACES
COLLECTOR BOX EXTENSION DRAIN TUBE
COLLECTOR BOX DRAIN TUBE
(BLUE AND WHITE STRIPED)
CONDENSATE TRAP
INDUCER HOUSING DRAIN TUBE (VIOLET)
NOTE:
1. All tubing must be connected securely and routed to avoid kinks and traps.
2. Pressure tubing must always slope away from pressure switch to collector box connection as shown.
3. HORIZONTAL-LEFT installations require the collector box pressure tube to be relocated between the inducer housing and the blower shelf to
prevent a trap. Refer to the Installation Instructions for further details.
326476-201 REV. B
(lit-bottom)
A01052
Fig. 10 -- Furnace Pressure and Draining Tube Diagram
9
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BURNER FLAME
!
CAUTION
BURNER
BURN HAZARD
Failure to follow this caution may result in personal injury.
Allow igniter to cool before removal. Normal operating
temperatures exceed 2000°F (1093°C).
a. Remove burner box cover.
b. Remove igniter wires from slot in manifold grommet.
(See Fig. 7.)
c. Using a 1/4 in. driver, remove the single screw securing
the igniter bracket to the burner box bracket (See Fig.
13.) and carefully withdraw the igniter and bracket as-
sembly through the front of the burner box without
striking the igniter on surrounding parts. Note that the
igniter bracket has a handle that extends to the front of
the burner box to aid in handling (See Fig. 13.).
MANIFOLD
A89020
Fig. 11 -- Burner Flame
d. Inspect igniter for signs of damage or failure.
!
CAUTION
PAM
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
RTV
The igniter is fragile. DO NOT allow it to hit the side of the
burner box parts while removing or replacing it.
e. If replacement is required, replace igniter on igniter
bracket and then install assembly to burner box to avoid
damage to the igniter.
6. To replace igniter and bracket assembly, reverse items 5a
through 5d.
7. Reconnect igniter wire connection and insert the igniter
wires in the slot in the manifold grommet, dressing the ig-
niter wires to ensure there is no tension on the igniter itself.
(See Fig. 7.)
A93081
!
Fig. 12 -- Gasket on Collector Box
CAUTION
UNIT COMPONENT ELECTRICAL SHORT HAZARD
Step 6 — Servicing Hot Surface Igniter
The igniter does NOT require annual inspection. Check igniter
resistance before removal.
Failure to follow this caution may result in unit component
damage.
Igniter wires must be securely placed in slot in manifold
grommet or else they could become pinched or severed and
electrically shorted.
1. Turn off gas and electrical supplies to furnace.
2. Remove main furnace door.
3. Disconnect igniter wire connection.
4. Check igniter resistance. Igniter resistance is affect by tem-
perature. Only check resistance when the igniter is at room
temperature.
8. Reinstall burner box cover.
9. Turn on gas and electrical supplies to furnace.
d. Using an ohm meter, check resistance across both ig-
niter leads in connector.
10. Verify igniter operation by initiating furnace control board
self-test feature or by cycling thermostat.
e. Cold reading should be between 40 ohms and 70 ohms.
5. Remove igniter assembly.
11. Replace main furnace door.
10
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!
CAUTION
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in furnace component
or property damage.
If this furnace is to be operated in an unconditioned space
where the ambient temperatures may be 32_F (0_C) or lower,
freeze protection measures must be taken. (See Fig. 18). See
CONDENSATE DRAIN PROTECTION section of
Installation, Start--up, and Operating Instructions.
A05075
Fig. 13 -- Igniter Bracket
Step 8 — Checking Heat Tape Operation (If
Applicable)
In applications where the ambient temperature around the furnace
is 32°F (0_C) or lower, freeze protection measures are required. If
this application is where heat tape has been applied, check to
ensure it will operate when low temperatures are present.
NOTE: Heat tape, when used, should be wrapped around the
condensate drain trap and drain line. There is no need to use heat
tape within the furnace casing. Most heat tapes are temperature
activated, and it is not practical to verity the actual heating of the
tape. Check the following:
1. Check for signs of physical damage to heat tape such as
nicks, cuts, abrasions, gnawing by animals, etc.
2-5/32˝
2. Check for discolored heat tape insulation. If any damage or
(55 mm)
discolored insulation is evident, replace heat tape.
A04181
3. Check that heat tape power supply circuit is on.
Fig. 14 -- Igniter
Step 9 — Winterizing
Step 7 — Electrical Controls and Wiring
!
CAUTION
!
WARNING
UNIT DAMAGE HAZARD
Failure to follow this caution may result in furnace component
damage.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Freezing condensate left in the furnace may damage the
furnace.
There may be more than 1 electrical supply to the unit. Check
accessories and cooling unit for additional electrical supplies.
If the furnace will be off for an extended period of time in a
structure where the temperature will drop to 32°F (0_C)or below,
winterize as follows:
The electrical ground and polarity for 115-v wiring must be
maintained properly. Refer to Fig. 15 or 16 for field wiring
information and to Fig. 22 for unit wiring information.
1. Turn off electrical supply to furnace.
2. Remove main furnace door.
NOTE: If the polarity is not correct or the furnace is not
grounded, the STATUS LED on the furnace control board will
flash rapidly and prevent the furnace from operating. The control
system also requires an earth ground for proper operation of the
furnace control board and flame sensor.
3. Disconnect cap from unused drain tap on inducer housing.
(See Fig. 19.)
4. Connect field-supplied 1/2-in. (13 mm) I.D. tube to upper
inducer housing drain connection.
The 24-v circuit contains an automotive-type, 3-amp fuse located
on the control. (See Fig. 17.) Any direct shorts of the 24-v wiring
during installation, service, or maintenance will cause this fuse to
blow. If fuse replacement is required, use ONLY a 3 amp fuse. The
control LED will display status code 24 when fuse needs to be
replaced.
!
CAUTION
UNIT DAMAGE HAZARD
Failure of plastic components may occur.
Do not use ethylene glycol (Prestone II antifreeze/coolant or
equivalent automotive type).
With power to the unit disconnected, check all electrical
connections for tightness. Tighten all screws on electrical
connections. If any smoky or burned connections are found,
disassemble the connection, clean all parts, strip wire, and
reassemble properly and securely.
Reconnect electrical supply to unit and observe unit through 1
complete operating cycle for proper operation.
11
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FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
1-STAGE THERMOSTAT TERMINALS
W
Y
R
G
C
FIVE
WIRE
FIELD-SUPPLIED
FUSED DISCONNECT
TWO-WIRE
HEATING-
ONLY
208/230- OR
460-V
THREE
PHASE
W2
BLK
BLK
GND
GND
GND
COM
W/W1
WHT
WHT
208/230-V
SINGLE
PHASE
GND
GND
Y/Y2
115-V FUSED
DISCONNECT
SWITCH
JUNCTION
BOX
GND
R
G
CONTROL
CONDENSING
UNIT
(WHEN REQUIRED)
BOX
24-V
TERMINAL
BLOCK
NOTES: 1. Connect Y-terminal as shown for proper operation.
FURNACE
2. Some thermostats require a "C" terminal connection as shown.
3. If any of the original wire, as supplied, must be replaced,
use same type or equivalent wire.
A99071
Fig. 15 -- Field Wiring
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
2-STAGE THERMOSTAT TERMINALS
W2 W1 Y2
R
G
Y1
C
SEVEN
WIRE
FIELD-SUPPLIED
FUSED DISCONNECT
THREE-WIRE
208/230- OR
HEATING-
ONLY
460-V
THREE
PHASE
W2
COM
W/W1
BLK
BLK
GND
C
GND
GND
WHT
WHT
208/230-V
SINGLE
PHASE
GND
GND
Y/Y2
115-V FUSED
DISCONNECT
SWITCH
JUNCTION
BOX
Y1
Y2
GND
R
G
CONTROL
2-SPEED
CONDENSING
UNIT
(WHEN REQUIRED)
BOX
24-V
TERMINAL
BLOCK
NOTES: 1. Connect Y-terminal as shown for proper operation.
FURNACE
2. Some thermostats require a "C" terminal connection as shown.
3. If any of the original wire, as supplied, must be replaced,
use same type or equivalent wire.
A99072
Fig. 16 -- Field Wiring
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SET UP SWITCHES
LOW HEAT ONLY
AND BLOWER
OFF-DELAY
TWINNING AND/OR
COMPONENT TEST
TERMINAL
ACRDJ - AIR CONDITIONING
RELAY DISABLE JUMPER
LHT
OFF
DLY
24-V THERMOSTAT
TERMINALS
HUMIDIFIER TERMINAL
(24 VAC 0.5 AMPS MAX)
TEST / TWIN
HUM
TRANSFORMER
24 VAC CONNECTIONS
PL1-LOW VOLTAGE
FUSE 3-AMP
MAIN HARNESS CONNECTOR
3-AMP FUSE
SEC-2
COM
SEC-1
24VAC
LED OPERATION
& DIAGNOSTIC LIGHT
COM
HI HT
COOL
LO HT
BLOWER SPEED
TERMINALS
SPARE 2 SPARE 1
EAC-2
EAC-1
115-VAC (L2)
NEUTRAL
CONNECTIONS
HSI HI LO
L1 BL-1 PR-1
115 VAC LINE (L1)
CONNECTION
PL2 - HOT SURFACE
IGNITER/INDUCER
MOTOR CONNECTION
115 VAC
BLOWER POWER (BL1)
CONNECTION
A08344
Fig. 17 -- Two-Stage Control
5. Insert funnel in tube and pour up to 1 quart of antifreeze,
propylene glycol (RV, swimming pool antifreeze, or equi-
valent) into funnel until it is visible at point where condens-
ate enters open drain. (See Fig. 20.)
To retrieve previous codes, remove one of the red main limit or
flame rollout switch wires 1 to 4 sec until the LED light goes out,
the reconnect it. (Do not leave red wire disconnected for longer
periods of time as the control will assume an overtemperature
condition exists and will respond with blower operation.) This
places the control in the status recall mode and displays the first
code stored in memory.
6. Reconnect drain cap to inducer housing.
7. Replace main furnace door.
8. Propylene glycol need not be removed before restarting fur-
nace.
WIRING DIAGRAM
See Fig. 22 for Wiring Diagram.
TROUBLESHOOTING
Use the Troubleshooting Guide, the status code LED on the
control and the Component Test to isolate furnace operation
problems.
Step 1 — Status Codes
For an explanation of status codes, refer to service label located on
back of main furnace door or Fig. 21. The stored status codes will
NOT be erased from the control memory, if 115-or 24-v power is
interrupted. The control will store up to 7 Status Codes.
NOTE: Removing the blower access door will open the blower
access door switch and terminate 115--v power to the control. To
read current status code, remove main furnace door. The status
code LED can be viewed through the sight glass on the blower
access door.
NOTE: NO thermostat signals may be present at control and all
blower off delays must be completed to view previous codes.
A07911
Fig. 18 -- Winterizing the Furnace
13
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A99118
A99119
Fig. 19 -- Inducer Housing Drain Tube Cap
Fig. 20 -- Funnel in Drain Tube and Antifreeze
Running Through Trap
Record the code and repeat the disconnect and reconnect of the red
wire, recording each code until code 11 is displayed indicating no
additional codes. After the last code is displayed or after 2 minutes
in the code recall mode the control will return to normal standby
mode.
1. Remove blower access door.
2. Disconnect thermostat R lead from furnace control.
3. Manually close blower door switch.
4. For approximately 2 sec, short (jumper) the COM-24 v ter-
minal on control to the TEST/TWIN 3/16-in. quick-connect
terminal on control until LED turns off. Remove jumper
from terminals. (See Fig.17.)
Step 2 — Component Test
NOTE:
The furnace control component test allows all
components to run for a short time; except the gas valve and
humidifier terminal HUM are not energized for safety reasons. The
EAC--1 terminal is energized when blower is energized. This
feature helps diagnose a system problem in case of a component
failure. The component test feature will not operate if any
thermostat signal is present at control and not until all time delays
are completed.
NOTE: If TEST/TWIN and COM--24v terminals are jumpered
longer than 2 sec, LED will flash rapidly and ignore status code
retrieval request.
Component test sequence for 2-stage furnace is as follows:
a. LED will display previous status code 4 times.
b. Inducer motor starts on high--speed and continues to run
until Step g of component test sequence.
To Begin Component Self-Test:
c. Hot surface igniter is energized for 15 sec, then off.
d. Blower motor operates on LO--HEAT speed for 10 sec.
e. Blower motor operates on HI--HEAT speed for 10 sec.
f. Blower motor operates on COOL speed for 10 sec.
g. Inducer motor goes to low--speed for 10 sec, then stops.
!
WARNING
ELECTRICAL SHOCK AND UNIT OPERATION
HAZARD
5. Reconnect R lead to furnace control, remove tape from
Failure to follow this warning could result in personal injury,
or death.
blower door switch, and re-install blower door.
6. Operate furnace per instruction on outer door.
Blower access panel door switch opens 115-v power to control
board. No component operation can occur. Caution must be
taken when manually closing this switch for service purposes.
7. Verify furnace shut down by lowering thermostat setting
below room temperature.
8. Verify that furnace restarts by raising thermostat setting
above room temperature.
14
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SERVICE
If status code recall is needed, briefly remove then reconnect one main limit wire
to display last stored status code. Repeat remove-and-reconnect four more times
for previous four status codes, after which the five codes repeat. Status code 11
will display when less than four previous status codes exist. On RED LED controls
do not remove power or blower door before initiating status code recall.
LED CODE
STATUS
CONTINUOUS OFF - Check for 115VAC at L1 & L2, & 24VAC at SEC-1 & SEC-2.
CONTINUOUS ON - Control has 24VAC power.
RAPID FLASHING - Line voltage (115VAC) polarity reversed. If twinned,
refer to twinning kit instructions.
EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST
DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY
THE NUMBER OF LONG FLASHES.
11 NO PREVIOUS CODE - Stored status codes are erased automatically after 72
hours. On RED LED boards stored status codes can also be erased when
power (115 VAC or 24 VAC) to control is interrupted.
12 BLOWER ON AFTER POWER UP (115 VAC or 24 VAC) -Blower runs for the
selected blower off-delay time, if unit is powered up during a call for heat
(R-W/W1 closed) or (R-W/W1) opens during blower on-delay.
13 LIMIT CIRCUIT LOCKOUT - Lockout occurs if a limit or flame rollout switch is
open longer than 3 minutes. - Control will auto reset after three hours.
- Refer to #33.
14 IGNITION LOCKOUT - Control will auto-reset after three hours. Refer to #34.
21 GAS HEATING LOCKOUT - Control will NOT auto reset.
Check for: - Mis-wired gas valve
- Defective control (valve relay)
22 ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve
is de-energized. Inducer will run until fault is cleared. Check for:
- Leaky gas valve
- Stuck-open gas valve
23 PRESSURE SWITCH DID NOT OPEN Check for:
- Obstructed pressure tubing
- Pressure switch stuck closed
24 SECONDARY VOLTAGE FUSE IS OPEN Check for:
- Short circuit in secondary voltage (24VAC) wiring.
31 HIGH-HEAT PRESSURE SWITCH OR RELAY DID NOT CLOSE OR
REOPENED
Control relay may be defective, refer to status code #32
32 LOW-HEAT PRESSURE SWITCH DID NOT CLOSE OR REOPENED - If
open longer than five minutes, inducer shuts off for 15 minutes before retry. If
opens during blower on-delay period, blower will come on for the selected
blower off-delay. Check for: - Excessive wind
- Restricted vent
- Defective inducer motor
- Low inlet gas pressure (if LGPS used)
- Low inducer voltage (115 VAC)
- Proper vent sizing
- Defective pressure switch
- Inadequate combustion air supply
- Disconnected or obstructed pressure tubing
33 LIMIT CIRCUIT FAULT - Indicates a limit or flame rollout, switch is open.
Blower will run for 4 minutes or until open switch remakes whichever is longer.
If open longer than 3 minutes, code changes to lockout #13. If open less than
3 minutes status code #33 continues to flash until blower shuts off. Flame rollout
switch requires manual reset. Check for: - Dirty filter or restricted duct system
- Proper vent sizing - Restricted vent - Loose blower wheel - Excessive wind
- Defective blower motor or capacitor
- Defective switch or connections
- Inadequate combustion air supply (Flame Roll-out Switch open).
34 IGNITION PROVING FAILURE - Control will try three more times before lock
out #14 occurs. If flame signal lost during blower on-delay period, blower will
come on for the selected blower off-delay. Check for:
- Oxide buildup on flame sensor (clean with fine steel wool)
- Proper flame sense microamps (.5 microamps D.C. min., 4.0 - 6.0 nominal)
- Manual valve shut-off
- Control ground continuity
- Low inlet gas pressure
- Gas valve defective or gas valve turned off
- Inadequate flame carryover or rough ignition
- Flame sensor must not be grounded
- Defective Hot Surface Ignitor
- Green/Yellow wire MUST be connected to furnace sheet metal
43 LOW-HEAT PRESSURE SWITCH OPEN WHILE HIGH-HEAT PRESSURE
SWITCH IS CLOSED - Check for: - Disconnected or obstructed pressure tubing
- Mis-wired pressure switches
- Low-heat pressure switch stuck open
- Low inlet gas pressure (if LGPS used)
45 CONTROL CIRCUITRY LOCKOUT Auto-reset after one hour lockout due to;
- Gas valve relay stuck open
- Software check error
- Flame sense circuit failure
Reset power to clear lockout. Replace control if status code repeats.
COMPONENT TEST
To initiate the component test sequence, shut OFF the room thermostat or
disconnect the "R" thermostat lead. Briefly short the TEST/TWIN terminal to the
"Com 24V" terminal. Status LED will flash last status code and then turn ON the
inducer motor. The inducer motor will start in HIGH speed and remain on HIGH
speed until the end of the test then shift to LOW speed for 7 to 15 seconds. The hot
surface ignitor, blower motor LO HEAT speed, blower motor HI HEAT speed, and
blower motor COOL speed will be turned ON for 10-15 seconds each. Gas Valve
and Humidifier will not be turned on. When the blower is turned OFF the inducer will
be switched to low-speed for 10 seconds.
327885-101 REV. B
A02258
Fig. 21 -- Service Label
15
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A08343
Fig. 22 -- Wiring Diagram
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A05095
17
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A05095
Catalog No: 58MEC---01SM
Copyright 2009 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Printed in U.S.A.
Edition Date: 09/09
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Replaces: NEW
18
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