Carrier GAS FURNACE 58MXA Operation manual

Copyright 1994 Carrier Corporation Form 58MXA-2PD
Product
Data
58MXA
Deluxe 4-Way Multipoise
Fixed-Capacity Condensing
Gas Furnace
Series 111
Input Capacities: 40,000 thru 120,000 Btuh
HEATING & COOLING
4-way Multipoise Design
Allows More Applications . . .
Themodel58MXAisamustforyour
product line. This high-efficiency
furnace allows more applications with
its reliable 4-way multipoise design.
The model 58MXA is available in 10
heat/airflow combinations and with the
4-way multipoise design can be
installed in upflow, downflow, or
horizontal positions covering up to 40
different applications. The furnace is
factory configured for upflow
application.
Thisversatile unit utilizeshotsurface
ignition (HSI) which ignites the burners
directly. HSI eliminates gas waste that
typical continuous-pilot designs can
bring. Hot surface ignition provides
reliable start-up and operation.
Take a look at the control center on
the model 58MXA. Control of the
ignition, inducer, and blower operation
is all handled in 1 central printed circuit
board. The status indicator on the
control signals when a fault has
occurred and identifies where the
problem is. This, along with the
component test feature, makes the
58MXA one of the easiest gas furnaces
to troubleshoot.
High efficiency is achieved by
maximizing heat transfer. The model
58MXA uses 100% outdoor air for
combustion in a sealed combustion
system. The result is energy-saving
efficiency,92%AnnualFuelUtilization
Efficiency (AFUE), and reduced
operational noise. The model 58MXA
is 1 of the quietest furnaces in the
industry.
A unique feature of this unit is the
patented polypropylene-laminated heat
exchanger. This secondary heat
exchangerensuresthatall availableheat
is properly transferred to the airstream
This document was created with FrameMaker 4.0.4

2
and throughout the home. Using the
exclusive flow-through design, the
secondary heat exchanger reduces the
pressure drop in the furnace which leads
to lower electrical usage, an important
part of this unit’s efficiency. Carrier heat
exchangers are backed by a Lifetime
Limited Warranty.*
Whenwe put itall together, themodel
58MXA combines quality and design to
bring high efficiency and comfort. You
will enjoy the versatility and ease of
installation of this unit. The model
58MXA is equipped for either left- or
right-side connections. Blower speeds
are easily adjustable with speed-taps
easily located on the control center. An
updated, more efficient inducer allows
for more use of 2-in. vent and
combustion-air piping, keeping
installation costs low.
As with other Carrier furnaces, this
modelisdesigned toworkasapartofthe
total home comfort system which
includes elements for cooling, air
cleaning, humidification, ventilation,
and zoning.
58MXA FEATURES/
BENEFITS
Casing —One piece, seamless wrap-
around construction of heavy,
galvanized steel resists corrosion.
Insulated Blower Compartment —
Theacousticalinsulation reduces air and
motor noise to promote quiet
operation.
*See warranty details.
Certifications —The 58MXA units are
A.G.A. and C.G.A. design certified for
use with natural and propane gases. The
efficiency is GAMA efficiency rating
certified. The 58MXA meets the oxides
of nitrogen (NO
x
) emission levels set by
South Coast and Bay Area Air Quality
Management Districts in California.
Warranties —Limited Lifetime
Warranty on the heat exchangers for the
lifetime of original owner in single
family residence; 20 years in other
residential and commercial applications.
Three-year Warranty on microprocessor
control,HSI,and inducermotor.Contact
your dealer for details.
CombustionProductsVenting —The
combustion-air and vent pipes can
terminate through a side wall or through
the roof when used with a factory-
authorized vent termination kit.
Blower Access Panel Switch —Shuts
off all 24-v power to furnace whenever
blower access panel is opened.
Hot Surface Ignitor —No pilot flame
to waste gas or cause problems.
Slow Opening Redundant Gas
Valve
—Shuts off gas to burners if one
ofthe valvesfails toclose completelyfor
any reason. The slow opening feature
reduces start-up noise from rapid
ignition.
Insulation —Foil-faced insulation in
heat exchanger section of the casing
minimizes heat loss.
Control Center —Microprocessor
controls sequencing and furnace
operation. Equipped with a component
test feature and status indicator light
to assist in troubleshooting. Micro-
processor blower control timed
blowers start after main burners ignite
to eliminate cold air blowing into
rooms.
Adjustable Blower Speed —For
precise airflow selection of heating or
cooling operation.
Direct Vent Sealed Combustion
System
—Model 58MXA uses 100%
outdoor air, which results in especially
quiet operation. Direct venting also
minimizes the possibility of chloride
contamination which can result in heat
exchanger corrosion. Also reduces air
infiltration into the home.
Monoport Burners —The burners
are finely tuned for smooth, quiet
combustion plus economical gas
usage.
Serpentuff  —Exclusive Serpentuff
coating, a patented Polypropylene
laminate is used on the secondary heat
exchanger.
BottomClosure —Factory-installedfor
side return; easily removable for bottom
return.
A92505
HEAT EXCHANGERS
32615
TEST
LED
1
SW1
BLOWER
OFF DELAY
P5
HUM C W Y R G
SEC-1 SEC-2
3
COOL SPARE-1
HEAT SPARE-2
9404
L2
PR2
COM
P3
P2
PR1L1
HUM COM
24V
W Y R G
LINE VOLTAGE
L1 PR1
120 VAC
2 1
HS1
PL2
IND
PL3
1
2
3
LINE
VOLTAGE
NEUTRAL
COM
PR2
L2
BLOWER MOTOR
COOL
HEAT SPARE-1 SPARE-2
EAC-1
EAC-2
CONTROL POWER - 24VAC, 465 mA, 60Hz. ANSI Z21.20 AUTOMATIC IGNITION SYSTEM
F U S E 3 A
SEC-1 SEC-2
TEST
STATUS
PL1
STATUS LED CODE:
(1) OFF (2) CONTINUOUSLY ON (3) RAPID FLASHING
-CHECK FOR 115 VAC AT L1&L2, ALSO 24VAC AT SEC-1 & SEC-2 -POWER IS O.K. -LINE VOLTAGE POLARITY REVERSED, IF TWINNED, LOW VOLTAGE POLARITY MAY BE OUT OF PHASE.
NOTE: SEE SEPARATE SERVICE LABEL FOR ADDITIONAL STATUS CODES.
TO INITIATE COMPONENT TEST SEQUENCE, DISCONNECT THERMOSTAT CONNECTIONS OR TURN OFF AND BRIEFLY SHORT (TEST) TERMINAL TO (C) TERMINAL. STATUS LED WILL FLASH CODE AND THEN TURN ON THE INDUCER MOTOR, HSI, BLOWER HEAT, BLOWER-COOL RELAYS FOR APPROXIMATELY 10 TO 15 SECONDS.
INTEGRATED FURNACE CONTROL
HUM C W Y R G
320791-101
REV. C
BLOWER-OFF DELAY
SWITCH SETTING
225 180 135 90
UNITED TECHNOLOGIES ELECTRONIC CONTROLS
HUNTINGTON, IN 46750
MODEL HK42FZ004 FOR USE WITH ALL GASES
1012-940
321
654
987
A94151
CONTROL CENTER
A94152
INDUCER ASSEMBLY

3
Carrier accessories*
* Factory authorized and field installed. Gas conversion kits are A.G.A. recognized.
† For 16 and 20 sizes only and in upflow application ONLY. See kit Installation Instructions for details.
N/A—Not Applicable
UNIT SIZE 040 060 080 100 120
ELECTRONIC AIR CLEANER (EAC)
Model 31KAX
HUMIDIFIER Models 49BF, 49BG, 49BP, 49FH, 49FP, and 49WS
2 TWINNING KIT (Upflow Only) N/A KGATW0301HSI†
2 RETURN-AIR PLENUM (With Washable Filters) Upflow Only KGARP0201ALL
SIDE FILTER RACK (Without Filter) Upflow Only KGAFR0206ALL
GAS CONVERSION KIT—
NATURAL-TO-PROPANE
KGANP2001ALL
GAS CONVERSION KIT—
PROPANE-TO-NATURAL
KGAPN1601ALL
DOWNFLOW BASE (For Combustible Floors, with or without A/C Coil) KGASB0201ALL
VENT TERMINATION KIT (Bracket Only for 2 Pipes) 2-in.—KGAVT0101BRA 3-in.—KGAVT0201BRA
CONCENTRIC TERMINATION KIT (Single Exit) 2-in.—KGAVT0501CVT 3-in.—KGAVT0601CVT
SIDE-WALL VENT TERMINAL COVER 2-in.—KGAVT0301COV 3-in—KGAVT0401COV
Model number nomenclature
58MXA 040
Deluxe 4-Way Multipoise Fixed-Capacity
Condensing Gas Furnace
Input Capacity
040—40,000 Btuh 100—100,000 Btuh
060—60,000 Btuh 120—120,000 Btuh
080—80,000 Btuh
111 08
Cooling Airflox
(Nominal 400 CFM per
12,000 Btuh Cooling)
08 — 800 CFM
12 — 1200 CFM
16 — 1600 CFM
20 — 2000 CFM
Series
A93067
RETURN-AIR
PLENUM
Custom-made return-air
plenum can be mounted on
either side of the furnace. Two
framed washable filters
included.
A 25 in.
B 16 in.
C 38-7/8 in.
5
⁄
8
″
C
AB
FILTER
FILTER
FURNACE
A93068
SIDE FILTER RACK
Custom made filter rack for
easyconnection when a return
plenum already exists.
Provides easy access for
cleaning filter. Accepts one
16 x 25 x 1 in. filter.
A 23-1/8 in.
B 2-3/8 in.
C 14-1/2 in.
DOORFURNACE
FILTER FRAME
B
A
FILTER
A93086
CONCENTRIC
VENT
A concentric vent kit allows
vent and combustion-air pipes
to terminate through a single
exit in a roof or sidewall.
One pipe runs inside the other
allowing venting through the
inner pipe and combustion air
to be drawn through the outer
pipe.
A91465
INDOOR AIR
QUALITY
EAC (shown) cleans the air of
smoke, dirt, and many pollens.
A Carrier humidifier will add
moisture to winter-dry air to
improvecomfortandhelpkeep
household items in better
condition. Moisturizing
household air also helps to
retain body heat and provide
comfort at lower temperature
.

4
NOTES:
1. The 58MXA Furnaces are for use with natural gas, but can be field-converted for propane gas with a factory-authorized and
listed accessory conversion kit.
2. Component location and configuration may be different than shown above.
8
10
5
16
9
6
11
5
4
18
217
3
12
7
1
14
15
13
19
A93202
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 ignitor for
safe, dependable heating.
4
Redundant gas valve. Safe, efficient. Features 1
gas control with 2 internal shut-off valves.
5
Vent outlet. Uses PVC pipe to carry vent gases
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. May be used for side
return application.
9 Condensate drain connection. Collects moisture
condensed during the combustion process.
J
Heavy-duty blower. Circulates air across the
heat exchangers to transfer heat into the
home.
K
Secondary condensing heat exchanger (inside).
Wrings out more heat through condensation.
ConstructedwithPolypropylene-laminatedsteel
to ensure durability.
L
Primary serpentine heat exchanger (inside).
Stretches fuel dollars with the S-shaped heat-
flow design. Solid construction of corrosion-
resistant aluminized steel means reliability.
M
Control center.
N
3-amp fuse provides electrical and component
protection.
O
Light emitting diode (LED) on control center.
Code lights are for diagnosing furnace operation
and service requirements.
P Pressure switch ensures adequate flow of flue
products through furnace and out vent system.
Q
Rollout switch (manual reset) to prevent
overtemperature.
R
Junction box for 115-v electrical power supply.
S Transformer (24v) behind control center
provides low-voltage power to furnace control
center and thermostat.

5
Physical data
*Gas input ratings are certified for elevations to 2000 ft. For elevations above 2000 ft, reduce ratings 4% for each 1000 ft above sea level. In Can-
ada, derate the unit 10% for elevations 2000 to 4500 ft above sea level.
† Capacity in accordance with U.S. Government DOE test procedures.
‡Air delivery above 1800 CFM requires that both sides, or a combination of 1 side and bottom, or bottom only of the furnace be used for return air.
Where 2 sets of data are listed, the first set is for bottom only return-air supply. The second set is for both sides, or 1 side and bottom return-air
supply. A filter is required for each return-air supply.
ICS—Isolated Combustion System
Clearance to combustibles
A93060
UNIT SIZE 040-08 040-12 060-12 060-16 080-12 080-16 080-20 100-16 100-20 120-20
OUTPUT CAPACITY BTUH†
(Nonweatherized ICS)
37,200 37,200 55,800 55,800 74,400 74,400 74,400 93,000 93,000 111,600
INPUT BTUH* 40,000 40,000 60,000 60,000 80,000 80,000 80,000 100,000 100,000 120,000
SHIPPING WEIGHT (Lb) 149 152 163 166 172 175 197 193 196 228
CERTIFIED TEMP RISE RANGE ( ° F) 30—60 15—45 30—60 20—50 40—70 30—60 20—50 45—75 30—60 40—70
CERTIFIED EXT STATIC PRESSURE
(In. wc)
Heating 0.10 0.10 0.12 0.12 0.15 0.15 0.15 0.20 0.20 0.20
Cooling 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50
AIRFLOW CFM‡ Heating 740 1205 1260 1300 1160 1285 1785 1315 1690 1650
Cooling 895 1230 1250 1545 1255 1525 1925/
2035 1570 1930/ 2130 2040/ 2130
LIMIT CONTROL SPST
HEATING BLOWER CONTROL (Off Delay) Selectable 90, 135, 180, or 225 Sec
BURNERS (Monoport) 2233444556
GAS CONNECTION SIZE 1/2-in. NPT
GAS VALVE (Redundant) Manufacturer White-Rodgers
Minimum Inlet Pressure (In. wc) 4.5 (Natural Gas)
Maximum Inlet Pressure (In. wc) 13.6 (Natural Gas)
IGNITION DEVICE Hot Surface
This unit complies with CAN/CGA 2.3 M86, CAN/CSA C22.2 No. 0-M91, CSA C22.2
No.3-1988 standards.
This appliance is equipped only for altitudes 0 - 2,000 ft (0-610 m) for use with natural
gas and propane. A conversion kit, supplied by the manufacturer, shall be used to
convert to the alternate fuel or elevation.
This direct-vent, forced-air furnace is for indoor installation in a building constructed on
site. For installation in alcove or closet at minimum clearances from combustible material
as shown below, minimum front clearance for service is 30 inches (762 mm).
This furnace is for use with schedule-40 PVC, PVC-DWV, or ABS-DWV pipe, and must
not be vented in common with other gas-fired appliances. Construction through which
vent/air intake pipes may be installed is maximum 24 inches (600 mm), minimum 3/4 inches
(19 mm) thickness (including roofing materials).
Special venting system required. In Canada use certified venting system specified by
furnace manufacturer. See Installation Instructions provided with furnace. Flue gas
temperature 131°F (55°C) vent pressure positive.
MINIMUM CLEARANCE TO COMBUSTIBLE MATERIAL
INCHES TOP BOTTOM SIDES BACK FRONT VENT
100 0 3 0
1++ 0 0 3 0
10+ 1*0 3 0
UPFLOW
DOWNFLOW
HORIZONTAL
++ For installation on combustible floors only when installed on special base No.
KGASB0201ALL.
*Clearance shown is for air inlet and air outlet end.
Horizontal position: Line contact is permissible only between lines formed by
intersections of top and two sides of furnace jacket, and building joists, studs, or framing.
+ 120,000 BTU Input Furnaces require 1 inch bottom clearance to combustible materials.