Carrier 58DXT Operating Instructions Manual
  1. Manuals
  2. Brands
  3. Carrier Manuals
  4. Furnace
  5. 58DXT
  6. Operating instructions manual
Carrier 58DXT Operating Instructions Manual

Carrier 58DXT Operating Instructions Manual

Downflow 2-speed, 2-stage, induced-combustion gas furnace
Hide thumbs Also See for 58DXT:
Table of Contents

Advertisement

Quick Links

See also: Service and Maintenance Instructions , User's Information Manual
Visit www.carrier.com
Installation, Start-Up, and Operating Instructions
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
Index
SAFETY CONSIDERATIONS .....................................................1
PROCEDURE ...........................................................................2
INTRODUCTION.......................................................................2-3
Dimensional Drawing ...............................................................2
Clearances to Combustibles......................................................3
LOCATION....................................................................................4
General ......................................................................................4
Location Relative to Cooling Equipment ................................4
Hazardous Locations.................................................................4
Unconfined Space .....................................................................5
Confined Space .........................................................................5
AIR DUCTS...................................................................................6
General Requirements...............................................................6
Ductwork Acoustical Treatment...............................................6
Supply Air Connection .............................................................6
Return Air Connections ............................................................6
(DOWNFLOW) ........................................................................6
Downflow Installation .............................................................6
Installation On Combustible Floor...........................................6
FILTER ARRANGEMENT...........................................................7
GAS PIPING...............................................................................7-8
ELECTRICAL CONNECTIONS ..................................................9
115-v Wiring.............................................................................9
24-v Wiring...............................................................................9
Accessories .............................................................................. 9
VENTING ......................................................................................9
General ....................................................................................10
Sequence of Operation ......................................................10-14
Adaptive Heating Mode ....................................................11-13
Non-Adaptive Heating Mode .................................................13
Cooling Mode .........................................................................14
Continuous Blower Mode.......................................................14
Heat Pump Mode ....................................................................14
Defrost Mode ..........................................................................15
Start-Up Procedures ................................................................15
Adjustments .......................................................................15-21
Set Gas Input Rate ............................................................15-19
Set Temperature Rise..............................................................20
Set Thermostat Heat Anticipator............................................21
Check Safety Controls ............................................................21
Checklist..................................................................................22
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101
Catalog No. 535-732
Tab 6a 8a
Sizes 060-100, Series 110 or 120
Page
Printed in U.S.A.
Downflow 2-Speed, 2-Stage,
Induced-Combustion Gas Furnace
®
REGISTERED QUALITY SYSTEM

SAFETY CONSIDERATIONS

Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified person-
nel should install, repair, or service heating equipment.
Untrained personnel can perform basic maintenance functions
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.
Follow all safety codes. In the United States, follow all safety
codes including the National Fuel Gas Code (NFGC) NFPA
54-1996/ANSI Z223.1-1996 and the Installation Standards, Warm
Air Heating and Air Conditioning Systems (NFPA 90B)
ANSI/NFPA 90B. In Canada, refer to the CAN/CGA-B149.1- and
.2-M95 National Standard of Canada, Natural Gas and Propane
Installation Codes (NSCNGPIC). Wear safety glasses and work
gloves. Have fire extinguisher available during start-up and
adjustment procedures and service calls.
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 would 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.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen-
tial construction practices. We require these instructions as a
minimum for a safe installation.
Form 58DXT-4SI
58DXT
ama
A PP R O VED
R
Pg 1
7-99
Replaces: 58DXT-3SI
.

Advertisement

Table of Contents
loading

Related Manuals for Carrier 58DXT

Summary of Contents for Carrier 58DXT

  • Page 1: Table Of Contents

    Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 535-732 Printed in U.S.A. Form 58DXT-4SI Pg 1 7-99 Replaces: 58DXT-3SI Tab 6a 8a...

  • Page 2: Electrostatic Discharge (Esd) Precautions Procedure

    INTRODUCTION → TROSTATIC CHARGE TO GROUND. The model 58DXT Series 110 or Series 120 Furnace is available in sizes 63,000 through 105,000 Btuh input capacities. 2. Firmly touch a clean, unpainted, metal surface of the furnace chassis which is close to the control. Tools held in a person’s The design of the downflow gas-fired furnace is A.G.A./C.G.A.

  • Page 3: Clearances To Combustibles

    INSTALLATION This unit is certified for downflow installation only. See Installation Manual for important installation instructions. MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION This forced air furnace is equipped for This furnace is approved for DOWNFLOW installations only. use with natural gas at altitudes 0 - 10,000 ft (0-3,050m).

  • Page 4: Location

    LOCATION RELATIVE TO COOLING EQUIPMENT The cooling coil must be installed parallel with or on downstream side of furnace to avoid condensation in heat exchangers. When installed parallel with furnace, dampers or other means used to control the flow of air must prevent chilled air from entering furnace.

  • Page 5: Unconfined Space

    The size of the openings depends upon whether air comes from outside of the structure or an unconfined space inside the structure. For Example: 1. All air from an unconfined space inside the structure requires 58DXT FURNACE MINIMUM SQ FT 2 openings (for structures not usually tight): HIGH-FIRE INPUT...

  • Page 6: Air Ducts

    Table 2—Minimum Free Area Of Combustion Air Opening AIR FROM INDOOR OUTDOOR AIR THROUGH OUTDOOR AIR THROUGH OUTDOOR AIR THROUGH 58DXT UNCONFINED VERTICAL DUCTS HORIZONTAL DUCTS SINGLE DUCT FURNACE SPACE HIGH-FIRE Free Area Free Area of Round Free Area of...

  • Page 7: Filter Arrangement

    PLENUM OPENING FLOOR OPENING A96283 Fig. 5—Floor and Plenum Opening Dimensions Table 3—Opening Dimensions (In.) FURNACE PLENUM OPENING FLOOR OPENING CASING APPLICATION WIDTH Non-Combustible Flooring 12-11/16 13-3/8 19-5/8 Combustible Flooring Using KGASB Subbase 11-13/16 13-7/16 20-3/8 14-3/16 Combustible Flooring with CD5 or CK5 Coil Assembly or 12-5/16 13-5/16 KCAKC Coil Box...
  • Page 8 FURNACE (OR COIL CASING FURNACE WHEN USED) CD5 OR CK5 COIL ASSEMBLY OR KCAKC COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING FLOORING DOWNFLOW SUBBASE SHEET METAL SHEET METAL PLENUM PLENUM FLOOR FLOOR OPENING OPENING A96285 A96284 Fig. 6—Furnace, Plenum, and Subbase Installed on Fig.

  • Page 9: Electrical Connections

    Do not connect aluminum wire between disconnect switch and furnace. Use only copper wire. → Make all electrical connections in accordance with the current edition of the National Electrical Code (NEC) ANSI/NFPA 70-1999 and any local codes or ordinances that might apply. For Canadian installations, all electrical connections must be made in SUPPLY accordance with CSA C22.1 Canadian Electrical Code or authori-...

  • Page 10: Start-Up, Adjustment, And Safety Check

    Table 5—Electrical Data OPERATING VOLTS— MAX WIRE MAXIMUM UNIT VOLTAGE RANGE HERTZ— UNIT WIRE LENGTH FUSE OR SIZE PHASE AMPS GAGE FT‡ CKT BKR AMPS† Max* Min* 060-12 115—60—1 10.5 080-16 115—60—1 14.2 100-20 115—60—1 17.9 * Permissible limits of the voltage range at which the unit will operate satisfactorily. †...

  • Page 11: Adaptive Heating Mode

    FIELD 24-V WIRING FIELD 115-, 208/230-, 460-V WIRING FACTORY 24-V WIRING FACTORY 115-V WIRING 2-STAGE THERMOSTAT TERMINALS SEVEN FIELD-SUPPLIED WIRE FUSED DISCONNECT THREE-WIRE 208/230- OR HEATING- 460-V ONLY THREE PHASE 208/230-V W/W1 SINGLE Y/Y2 PHASE 115-V FUSED JUNCTION DISCONNECT SWITCH CONTROL 2-SPEED (WHEN REQUIRED)

  • Page 13: Non-Adaptive Heating Mode

    This furnace can operate as a 2-stage furnace with a single- heat speed. Simultaneously, EAC terminals EAC-1 and stage thermostat because furnace control CPU includes a EAC-2 are energized with 115v and remain energized as programmed adaptive sequence of controlled operation which long as blower motor BLWM is energized.

  • Page 14: Cooling Mode

    pressure sufficiently, high-heat pressure switch HPS opens. thermostat is satisfied, blower motor BLWM operates The low-heat gas valve solenoid GV remains energized as an additional 2 sec on high-cool speed before reverting long as low-heat pressure switch LPS remains closed. back to continuous blower speed.

  • Page 15: Defrost Mode

    If R-G circuit remains closed, blower motor c. Verify furnace model. Table 9 can only be used for model BLWM reverts to continuous operation. 58DXT Furnaces. START-UP PROCEDURES d. Find installation altitude in Table 9. 1. Component test—The furnace features a component test NOTE: For Canada altitudes of 2000 to 4500 ft, use U.S.A.
  • Page 16 UNITED STATES At altitudes above 2000 ft, this furnace has been approved DO NOT bottom out gas valve regulator adjusting screw. for a 4 percent derate for each 1000 ft above sea level. See This can result in unregulated manifold pressure and result in Table 8 for derate multiplier factor and example.
  • Page 17 Table 9—Model 58DXT Orifice Size* and Manifold Pressure for Correct Input (Tabulated Data Based on 21,000 Btuh High Heat/13,500 Btuh Low Heat per Burner, Derated 4% for Each 1000 Ft Above Sea Level) SPECIFIC GRAVITY OF NATURAL GAS AVG GAS ALTITUDE 0.58...
  • Page 18 Table 9—Model 58DXT Orifice Size* and Manifold Pressure for Correct Input (Continued) (TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT PER BURNER, DERATED 4% FOR EACH 1000 FT ABOVE SEA LEVEL) SPECIFIC GRAVITY OF NATURAL GAS AVG GAS ALTITUDE 0.58...
  • Page 19 Table 9—Model 58DXT Orifice Size* and Manifold Pressure for Correct Input (Continued) (TABULATED DATA BASED ON 21,000 BTUH HIGH HEAT/13,500 BTUH LOW HEAT PER BURNER, DERATED 4% FOR EACH 1000 FT ABOVE SEA LEVEL) SPECIFIC GRAVITY OF NATURAL GAS AVG GAS ALTITUDE 0.58...

  • Page 20: Set Temperature Rise

    Table 10—Gas Rate (Cu Ft/Hr) LOW-FIRE ON/OFF ADJUSTMENT SWITCH SIZE OF TEST DIAL SIZE OF TEST DIAL SECONDS SECONDS ALLEN SCREW FOR 1 FOR 1 (UNDER CAP) REVOLUTION REVOLUTION cu ft cu ft cu ft cu ft cu ft cu ft HIGH-FIRE 1800 ADJUSTMENT...

  • Page 21: Set Thermostat Heat Anticipator

    THERMOSTAT SUBBASE TERMINALS WITH THERMOSTAT REMOVED Disconnect electrical power before changing speed tap (or (ANITICIPATOR, CLOCK, ETC., removing cap on 5-speed motors). A failure to follow this MUST BE OUT OF CIRCUIT.) warning can cause personal injury or death. HOOK-AROUND AMMETER NOTE: For furnaces with 5-speed motors, ensure that unused speed tap is either capped or placed on SPARE terminal on control...

  • Page 22: Checklist

    a. Turn off 115-v power to furnace. CHECKLIST b. Remove blower access door. 1. Put away tools and instruments, and clean up debris. c. Disconnect red motor lead at blower speed selector. Mark 2. Check SW-1 through SW-4 after completing installation to terminal for proper reconnection.
  • Page 23 CHECKLIST—INSTALLATION LOAD CALCULATION CHECKLIST—START-UP ________ Heating Load (Btuh) Gas Input Rate ________ (Set Within 2 percent of Rating Plate) ________ Cooling Load (Btuh) ________ Temperature Rise Adjusted ________ Furnace Model Selection Thermostat Anticipator Setting Ad- AIR FOR COMBUSTION AND VENTILATION ________ justed or ________...
  • Page 24 [ ] Classroom Service Training A94328 Copyright 1999 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 58dxt4si Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Table of Contents