Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual
  1. Manuals
  2. Brands
  3. Carrier Manuals
  4. Furnace
  5. 58MTB
  6. Installation, start-up, and operating instructions manual
Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual

Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual

Deluxe 4–way multipoise 2-stage condensing gas furnace sizes 060-120, series 100
Hide thumbs Also See for 58MTB:
Table of Contents

Advertisement

Quick Links

See also: Service and Maintenance Instructions , Owner's Manual
Visit www.carrier.com
Installation, Start-up, and Operating Instructions
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: This furnace can be installed as a
or non-direct vent (1-pipe)
This symbol → indicates a change since the last issue.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS .....................................................2
CODES AND STANDARDS........................................................3
Safety.........................................................................................3
General Installation...................................................................3
Combustion and Ventilation Air ..............................................5
Duct Systems ............................................................................5
Acoustical Lining and Fibrous Glass Duct..............................5
Gas Piping and Gas Pipe Pressure Testing..............................5
Electrical Connections ..............................................................5
INTRODUCTION ..........................................................................6
APPLICATIONS............................................................................6
General ......................................................................................6
Upflow Applications.................................................................6
Downflow Applications ............................................................8
LOCATION..................................................................................14
General ....................................................................................14
Equipment ...............................................................................15
Hazardous Locations...............................................................15
Furnace Location and Application .........................................15
AIR FOR COMBUSTION AND VENTILATION ....................16
INSTALLATION .........................................................................19
Leveling Legs (If Desired) .....................................................19
Applications ............................................................................19
Installation in Horizontal Applications ..................................19
Air Ducts.................................................................................19
General Requirements .......................................................19
Ductwork Acoustical Treatment .......................................21
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
Tab 6a 8a
Sizes 060-120, Series 100
direct vent (2-pipe)
condensing gas furnace.
A93040
Printed in U.S.A.
Catalog No. 58MTB-1SI
Deluxe 4-Way Multipoise 2-Stage
Condensing Gas Furnace
Supply Air Connections ....................................................21
Return Air Connections.....................................................21
Filter Arrangement..................................................................21
Bottom Closure Panel.............................................................23
Gas Piping...............................................................................24
Electrical Connections ............................................................25
115-V Wiring.....................................................................25
24-V Wiring.......................................................................27
Accessories ........................................................................27
Systems ..............................................................................28
Combustion-Air and Vent Pipe Systems ...............................28
Condensate Drain....................................................................42
General...............................................................................42
Application.........................................................................42
Condensation Drain Protection .........................................43
General ....................................................................................43
Prime Condensate Trap With Water ......................................44
Purge Gas Lines......................................................................44
Sequence of Operation............................................................44
(Adaptive Mode)................................................................45
(Non-Adaptive Heating Mode) .........................................45
Cooling Mode ....................................................................46
Thermidistat Mode ............................................................46
Continuous Blower Mode .................................................50
Heat Pump .........................................................................50
Component Self-Test.........................................................50
Operate Furnace.................................................................51
Furnace Restart ..................................................................51
Adjustments.............................................................................51
Set Gas Input Rate ............................................................51
Set Temperature Rise ........................................................56
Adjust Blower Off Delay (Heat Mode)............................57
Set Thermostat Heat Anticipator ......................................57
Check Safety Controls ............................................................57
Checklist..................................................................................58
Pg 1
58MTB
8-05
Replaces: 58MTA-8SI

Advertisement

Table of Contents
loading

Related Manuals for Carrier 58MTB

Summary of Contents for Carrier 58MTB

  • Page 1: Table Of Contents

    Ductwork Acoustical Treatment ........21 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 Printed in U.S.A. Catalog No. 58MTB-1SI Pg 1 8-05 Replaces: 58MTA-8SI Tab 6a 8a...

  • Page 2: Safety Considerations

    In some instances, is used. The design of the 58MTB furnace is not CSA certified for these instructions exceed certain local codes and ordinances, installation in mobile homes, recreational vehicles, or outdoors.

  • Page 3: Codes And Standards

    Install this furnace only in a location and position as specified in This furnace is shipped with the following materials to assist in LOCATION and INSTALLATION sections of these instructions. proper furnace installation. These materials are shipped in the main →...

  • Page 5: Combustion And Ventilation Air

    INSTALLATION This forced air furnace is equipped for use with natural gas at altitudes 0 - 10,000 ft (0 - 3,050m), except 140 size furnaces are only approved for altitudes 0 - 7,000 ft. (0 - 2,135m). An accessory kit, supplied by the manufacturer, shall be used to convert to propane gas use or may be required for some natural gas applications. This furnace is for indoor installation in a building constructed on site.

  • Page 6: Electrostatic Discharge (Esd) Precautions

    → INTRODUCTION The model 58MTB 4-way multipoise, Gas-Fired, Category IV, condensing furnace is available in model sizes ranging from input capacity of 60,000 to 120,000 Btuh as a direct vent (2-pipe) application as well as a non-direct vent (1-pipe) application.
  • Page 7 FURNACE BLOWER SHELF CONDENSATE DOOR TRAP FURNACE CONDENSATE DOOR FURNACE TRAP (INSIDE) FURNACE SIDE SIDE FIELD FIELD DRAIN DRAIN CONN CONN ALTERNATE DRAIN TUBE LOCATION SIDE VIEW FRONT VIEW END VIEW FRONT VIEW CONDENSATE TRAP DRAIN TUBE LOCATION HORIZONTAL DOWNFLOW AND ALTERNATE UPFLOW APPLICATIONS EXTERNAL UPFLOW APPLICATIONS APPLICATIONS...

  • Page 8: Downflow Applications

    PLUG PLUG COLLECTOR BOX COLLECTOR BOX DRAIN TUBE (BLUE DRAIN TUBE (BLUE & WHITE STRIPED) & WHITE STRIPED) COLLECTOR BOX COLLECTOR BOX TUBE (PINK) TUBE (PINK) COLLECTOR BOX COLLECTOR BOX TUBE (GREEN) TUBE (GREEN) COLLECTOR BOX DRAIN TUBE (BLUE) INDUCER HOUSING (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX...
  • Page 9 COLLECTOR BOX DRAIN TUBE (BLUE) PLUG PLUG COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX COLLECTOR BOX DRAIN TUBE (BLUE) EXTENSION TUBE COLLECTOR BOX COLLECTOR BOX TUBE (PINK) TUBE (PINK) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX COLLECTOR BOX DRAIN TUBE (BLUE EXTENSION TUBE &...

  • Page 10: Horizontal Left (Supply-Air Discharge) Applications

    b. Remove and discard UPPER (molded) inducer housing CONDENSATE TRAP FREEZE PROTECTION drain tube which was previously connected to condensate Refer to Condensate Drain Protection section for recommenda- trap. tions and procedures. c. Install cap and clamp on UPPER inducer housing drain Step 4—Horizontal Left (Supply-Air Discharge) connection where molded drain tube was removed.

  • Page 11: Horizontal Right (Supply-Air Discharge) Applications

    PLUG COLLECTOR BOX AUXILIARY "J" BOX DRAIN TUBE (BLUE AND WHITE STRIPED) CONDENSATE COLLECTOR BOX TRAP TUBE (GREEN) INDUCER HOUSING COLLECTOR DRAIN TUBE (VIOLET) BOX EXTENSION COLLECTOR BOX DRAIN TUBE DRAIN TUBE (BLUE) COLLECTOR BOX EXTENSION TUBE DRAIN TUBE COUPLING COLLECTOR BOX TUBE (PINK) RELOCATE TUBE BETWEEN BLOWER SHELF AND INDUCER HOUSING FOR 040, 060, AND 080 HEATING INPUT FURNACES...
  • Page 12 COMBUSTION – AIR INTAKE VENT A 12-IN. MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM ″ EXITING THE VENT PIPE. WORK AREA ″ ⁄ MANUAL SHUTOFF ACCESS OPENING GAS VALVE FOR TRAP DRAIN...
  • Page 13 A 3-IN. MINIMUM CLEARANCE VENT TO COMBUSTION-AIR INTAKE IS REQUIRED. COMBUSTION–AIR INTAKE A 12-IN. MIN HORIZONTAL PIPE SECTION IS RECOMMENDED WITH SHORT (5 TO 8 FT) VENT SYSTEMS TO REDUCE EXCESSIVE CONDENSATE DROPLETS FROM EXITING THE VENT PIPE. 30-IN. MIN WORK AREA ″...

  • Page 14: Location

    COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX EXTENSION TUBE PLUG COLLECTOR BOX TUBE (PINK) AUXILARY “J” BOX RELOCATED HERE CONDENSATE TRAP COLLECTOR BOX DRAIN TUBE (BLUE AND WHITE STRIPED) INDUCER HOUSING DRAIN TUBE (VIOLET) COLLECTOR BOX EXTENSION TUBE A01028 Fig.

  • Page 15: Furnace Location Relative To Cooling Equipment

    FRONT LEVEL (0″) FRONT FRONT ⁄ ″ ⁄ ″ MAX ⁄ ″ MAX UPFLOW OR DOWNFLOW HORIZONTAL A02146 BACK Fig. 14—Proper Condensate Drainage FRONT UNIT DAMAGE HAZARD A93043 This gas furnace may be used for construction heat provided Fig. 15—Prohibit Installation on Back that: -The furnace is permanently installed with all electrical control flow of air shall be adequate to prevent chilled air from...

  • Page 16: Air For Combustion And Ventilation

    • Water softening chemicals • De-icing salts or chemicals • Carbon tetrachloride • Halogen type refrigerants • Cleaning solvents (such as perchloroethylene) • Printing inks, paint removers, varnishes, etc. • Hydrochloric acid • Cements and glues • Antistatic fabric softeners for clothes dryers •...
  • Page 17 → Table 1—Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICAL DUCTS (1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW) (1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW) (1 SQ.
  • Page 18 1 SQ IN. PER 4000 DUCTS BTUH* OUTDOORS CIRCULATING AIR VENT THROUGH ROOF DUCTS 12″ MAX 12″ 1 SQ IN. VENT PER 2000 THROUGH 12" MAX BTUH* ROOF 1 SQ IN. 1 SQ IN. 4000 PER 1000 BTUH* BTUH* IN DOOR OR WALL DUCTS UNCONFINED...

  • Page 19: Installation

    Combination of Indoor and Outdoor Air not required when this furnace is installed on manufacturer’s Coil Assembly Part No. CD5 or CK5, or Coil Box Part No. KCAKC is 1. Indoor openings shall compy with the Indoor Combustion used. Air Method below and, 1.
  • Page 20 PLENUM OPENING FLOOR OPENING A96283 Fig. 21—Floor and Plenum Opening Dimensions FURNACE FURNACE (OR COIL CASING WHEN USED) CD5 OR CK5 COIL ASSEMBLY OR KCAKC COIL BOX COMBUSTIBLE COMBUSTIBLE FLOORING FLOORING DOWNFLOW SUBBASE SHEET METAL PLENUM SHEET METAL PLENUM FLOOR FLOOR OPENING OPENING...

  • Page 21: Ductwork Acoustical Treatment

    Downflow Furnaces PERFORATED Connect supply-air duct to supply-air opening on furnace. The DISCHARGE DUCT FLANGE supply-air duct attachment must ONLY be connected to furnace supply/outlet or air conditioning coil casing (when used), when installed on non-combustible material. When installed on combus- tible material, supply-air duct attachment must ONLY be con- nected to an accessory subbase or factory approved air condition- ing coil casing.
  • Page 22 COMBUSTION-AIR INTAKE (NON-DIRECT VENT/1-PIPE COMBUSTION-AIR PIPE APPLICATION,SIZES 040 (DIRECT VENT/2-PIPE THROUGH 120 ONLY) APPLICATION,ALL SIZES) VENT 3-IN. MINIMUM CLEARANCE TO COMBUSTION-AIR INTAKE IS REQUIRED (NON-DIRECT VENT/1-PIPE ⁄ 8 -IN. ROD APPLICATION,SIZES 040 THROUGH 120 ONLY) ANGLE ″ ⁄ IRON OR EQUIVALENT ALTERNATE SUPPORT LOCATION 4-IN.

  • Page 23: Bottom Closure Panel

    WASHABLE FILTER FILTER RETAINER BOTTOM CLOSURE PANEL FRONT FILLER PANEL A93045 A93047 Fig. 26—Filter Installed for Side Inlet Fig. 28—Removing Bottom Closure Panel 21-IN. WIDE ⁄ -IN. WIDE CASINGS ONLY: CASINGS ONLY: SUPPORT RODS (3) INSTALL FIELD-SUPPLIED EXTEND 1/4" ON EACH CUT HAZARD FILTER FILLER STRIP SIDE OF FILTER AND...

  • Page 24: Gas Piping

    Table 5—Maximum Capacity of Pipe* SUPPLY NOMINAL LENGTH OF PIPE (FT) MANUAL IRON INTERNAL SHUTOFF PIPE DIAMETER VALVE SIZE (IN.) (REQUIRED) (IN.) SEDIMENT 0.622 TRAP 0.824 UNION 1.049 1-1/4 1.380 1400 1-1/2 1.610 2100 1460 1180 * Cubic ft of gas per hr. for gas pressures of 0.5 psig (14–in. wc) or less and a pressure drop of 0.5–in wc (based on a 0.60 specific gravity gas).

  • Page 25: Electrical Connections

    Table 6—Electrical Data OPERATING VOLTS— MAX WIRE MAX FUSE UNIT UNIT VOLTAGE RANGE HERTZ— UNIT WIRE LENGTH OR CKT BKR SIZE AMPACITY† PHASE AMPS SIZE (FT)‡ AMPS** Max* Min* 060–12 115-60-1 11.3 080–12 115-60-1 10.8 080–16 115-60-1 11.6 15.3 100–16 115-60-1 11.6 15.4...
  • Page 26 FIELD 24-V WIRING FIELD 115-, 208/230-, 460-V WIRING FACTORY 24-V WIRING FACTORY 115-V WIRING 1-STAGE THERMOSTAT TERMINALS FIVE FIELD-SUPPLIED WIRE FUSED DISCONNECT TWO-WIRE 208/230- OR HEATING- 460-V ONLY THREE PHASE 208/230-V W/W1 SINGLE PHASE Y/Y2 115-V FUSED JUNCTION DISCONNECT SWITCH CONTROL CONDENSING (WHEN REQUIRED)

  • Page 27: 24-V Wiring

    FACTORY INSTALLED LOCATION ELECTRIC DISCONNECT SWITCH COPPER POWER ENTRY HOLE WIRE ONLY FILLER PLUG (FACTORY- UNUSED 7/8-IN. SUPPLIED LOOSE PARTS BAG) DIAMETER POWER ENTRY HOLES ALUMINUM WIRE A93033 A05113 A05113 Fig. 33—Disconnect Switch and Furnace → Fig. 34—Factory Installed J-Box Location Use a separate, fused branch electrical circuit containing a properly 24-V WIRING sized fuse or circuit breaker for this furnace.

  • Page 28: Removal Of Existing Furnaces From Common Vent Systems

    NGPIC. unsafe condition. → The 58MTB can be vented as either a direct vent (all sizes) or as 3. As far as practical, close all building doors and windows a non-direct vent (except for 140 size) application. A direct vent...
  • Page 29 ACRDJ PRINTED CIRCIUT BOARD PRINTED CIRCIUT BOARD...
  • Page 30 Table 7—Approved Combustion-Air and Vent Pipe, Fitting and Cement Materials ASTM SPECIFICATION MATERIAL PIPE FITTINGS SOLVENT CEMENT AND PRIMERS DESCRIPTION (MARKED ON MATERIAL) D1527 Pipe — — Schedule-40 D1785 Pipe — — Schedule-40 Solvent D2235 For ABS — — For ABS Cement D2241 Pipe...
  • Page 31 SETUP SWITCHES TWINNING AND/OR LOW-HEAT ONLY AND COMPONENT TEST BLOWER OFF-DELAY TERMINAL ACRDJ - AIR CONDITIONING RELAY DISABLE JUMPER 24-V-THERMOSTAT TERMINALS TEST/TWIN TRANSFORMER 24-VAC CONNECTIONS 0.5-AMP024 VAC HUMIDIFIER TERMINAL (24-VAC 0.5 AMP MAX.) PL1 - LOW VOLTAGE MAIN FUSE 3-AMP HARNESS CONNECTOR SEC-1 SEC-2...
  • Page 32 A05009 Table 8—Direct Vent Termination Clearance...
  • Page 33 A05013 → Table 9—Other than Direct Vent Termination Clearance...
  • Page 34 Table 10—Maximum Allowabl Exposed Vent Pipe Length (ft) With and Without Insulation in Winter Design Temperature Ambient* WINTER DESIGN MAX PIPE UNIT WITHOUT WITH 3/8–IN. OR TEMPERATURE DIAMETER SIZE INSULATION THICKER INSULATION† (°F) (IN.) * Pipe length (ft) specified for maximum pipe lengths located in unconditioned spaces. Pipes located in unconditioned space cannot exceed total allowable pipe length as specified in Table 11.
  • Page 35 FIELD-SUPPLIED NOTE: Select 1 vent pipe connection and NOTE: Select 1 vent pipe connection and 1 combustion-air pipe connection. 1 combustion-air pipe connection. 2-IN. DIAMETER FIELD-SUPPLIED PVC 90° ELBOW 2-IN. DIAMETER PVC PIPE FLOW COMBUSTION- COMBUSTION- VENT VENT VENT VENT COMBUSTION- COMBUSTION- FLOW...
  • Page 36 TABLE 12—MAXIMUM ALLOWABLE PIPE LENGTH (FT) NON-DIRECT VENT DIRECT VENT (2-PIPE) ONLY NUMBER OF 90° ELBOWS UNIT MAX (1-PIPE) ONLY ALTITUDE (FT) INPUT RATE TERMINATION PIPE DIA PIPE DIA (BTUH) TYPE (IN.)* (IN.)* 1-1/2 1-1/2 2 Pipe or 2-in 60,000 Concentric 1-1/2 1-1/2...
  • Page 37 TABLE 12—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (Continued) NON-DIRECT VENT DIRECT VENT (2-PIPE) ONLY NUMBER OF 90° ELBOWS UNIT MAX (1-PIPE) ONLY ALTITUDE (FT) INPUT RATE TERMINATION PIPE DIA PIPE DIA (BTUH) TYPE (IN.)* (IN.)* 1-1/2 1-1/2 2 Pipe or 2-in 60,000 Concentric 2 Pipe or 2-in...
  • Page 38 TABLE 12—MAXIMUM ALLOWABLE PIPE LENGTH (FT) (Continued) NON-DIRECT VENT DIRECT VENT (2-PIPE) ONLY NUMBER OF 90° ELBOWS (1-PIPE) ONLY UNIT SIZE ALTITUDE (FT) TERMINATION PIPE DIA (BTUH) PIPE DIA TYPE (IN.)* (IN.)* 1-1/2 1-1/2 2 Pipe or 2-in 60,000 Concentric 2 Pipe or 2-in 80,000 Concentric...
  • Page 39 COMBUSTION-AIR PIPE GROMMETS UNUSED 1/2 -IN. DIAMETER GAS COMBUSTION CONN. HOLE -AIR PIPE GAS LINE GAS LINE ENTRY HOLE FILLER PLUG VENT PIPE GAS LINE GROMMET VENT PIPE GROMMET NOTE: PIPE GROMMETS AND ENTRY HOLE FILLER PLUGS ARE INCLUDED IN FACTORY-SUPPLIED LOOSE PARTS BAG A05057 →...
  • Page 40 COMBUSTION AIR PIPE (DIRECT VENT /2-PIPE) 12 ″ MIN COMBUSTION AIR COMBUSTION AIR 12 ″ MIN PIPE (NON-DIRECT PIPE (NON-DIRECT VENT/1-PIPE) VENT/1-PIPE) VENT PIPE VENT PIPE COMBUSTION AIR PIPE (DIRECT VENT/2-PIPE) HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALL COMBUSTION AIR PIPE (DIRECT VENT /2-PIPE) COMBUSTION AIR COMBUSTION AIR...
  • Page 41 Roof Termination (Preferred) At least 36 in. Concentric Vent and Combustion Air Roof Termination (preferred) Vertical separation between combustion At least air and vent 36 in. 8 3/4 in. for 3 in. kit Maintain 12 min. clearance above 18 in. maximum 6 3/4 in.

  • Page 42: Condensate Drain

    1/2-in. CPVC or PVC tee for vent and A/C or humidifier drain Multiventing and Vent Terminations connection. When 2 or more 58MTB Furnaces are vented near each other, each Outdoor draining of the furnace is permissible if allowed by local furnace must be individually vented. NEVER common vent or codes.

  • Page 43: Condensation Drain Protection

    CONDENSATE TRAP OPEN STAND WIRE TIE(S) PIPE FOR A/C OR HUMIDIFIER DRAIN HEAT TAPE (3 WRAPS MINIMUM) TO OPEN DRAIN A93036 Fig. 47—Condensate Trap Heat Tape A94054 Fig. 46—Example of Field Drain Attachment Step 1—General The furnace must have a 115-v power supply properly connected and grounded.

  • Page 44: Prime Condensate Trap With Water

    A99118 Fig. 48—Inducer Housing Drain Cap FIRE HAZARD A99119 Failure to follow this caution may result in intermittent unit operation or performance satisfaction. Fig. 49—Filling Condensate Trap This furnace is equipped with a manual reset limit switch in the burner box area. The switch will open and shut off power to the gas valve if a flame rollout or overheating condition FIRE AND EXPLOSION HAZARD occurs in the burner enclosure area.

  • Page 45: Two-Stage Heating With Single-Stage Thermostat (Adaptive Mode)

    TWO-STAGE HEATING WITH SINGLE-STAGE before going to Ignition-Lockout. Lockout will be reset THERMOSTAT (ADAPTIVE MODE) automatically after three hours, by momentarily interrupting 115 vac power to the furnace, or by interrupting 24 vac power (See Fig. 31 for thermostat connections.) at SEC1 or SEC2 to the furnace control CPU (not at W/W1, G, NOTE: Low-heat-only switch, SW-1, selects either the low-heat- R, etc.).

  • Page 46: Cooling Mode

    the high-heat gas valve solenoid GV-HI is energized. The conditioning relay ACR. When the air conditioning relay blower motor BLWM will switch to HI HEAT speed five ACR is energized the R to Y1-and-Y2 circuits switch the seconds after the R to W2 circuit closes. outdoor unit to high-cooling speed, and the R to G-and- Y1-and-Y/Y2 circuits switch the furnace blower motor 2.
  • Page 47 A00277 A00275 Fig. 50C—Two-Stage Furnace with Single-Speed Heat Fig. 50A—Two-Stage Furnace with Single-Speed Air Pump (Dual Fuel) Conditioner A00276 A00278 Fig. 50B—Two-Stage Furnace with Two-Speed Air Fig. 50D—Two-Stage Furnace with Two-Speed Heat Pump (Dual Fuel) Conditioner...
  • Page 48 A00281 Fig. 50G—Two-Stage Thermostat With Two-Stage Furnace and Two-Speed Air Conditioner A00279 Fig. 50E—Dual Fuel Thermostat with Two-Stage Furnace and Single-Speed Heat Pump A00282 Fig. 50H—Single-Stage Thermostat With Two-Stage Furnace and Two-Speed Air Conditioner A00280 Fig. 50F—Dual Fuel Thermostat With Two-Stage Furnace and Two-Speed Heat Pump...
  • Page 49 Notes for Fig. 50A-H: 1. Heat pump MUST have a high pressure switch for dual fuel applications. 2. Refer to outdoor equipment Installation Instructions for additional information and setup procedure. 3. Select the ″ZONE″ position on the two-speed heat pump control. 4.

  • Page 50: Continuous Blower Mode

    b. When the R to G-and Y/Y2 circuit is closed and there is a and-G signals disappear at the same time, the blower motor demand for dehumidification, the furnace blower motor BLWM will remain on for the selected blower-OFF delay period. BLWM will drop the blower speed from COOL to HI If the R to W/W1-and-Y1 signals disappear, leaving the G signal, HEAT for a maximum of 10 minutes before reverting back...

  • Page 51: Operate Furnace

    Verify furnace model and size. Table 14 can only be used g. Jumper R and W1 and W2 thermostat connections on for model 58MTB furnaces with heating inputs of control. (See Fig. 37.) This keeps furnace locked in 20,000/13,000 (High/Low) Btuh per burner.
  • Page 52 Table 14—Model 58MTB Orifice Size and High/Low-Heat Manifold Pressures for Correct Inputs for Use with 060 Through 120 Size Furnaces Only (Tabulated Data Based on 20,000/13,000 Btuh per Burner, Derated 2 Percent for Each 1000 ft Above Sea Level)* SPECIFIC GRAVITY OF NATURAL GAS...
  • Page 53 Table 14—Model 58MTB Orifice Size and High/Low-Heat Manifold Pressures for Correct Inputs (Continued) for Use With 060 Through 120 Size Furnaces Only (Tabulated Data Based on 20,000/13,000 Btuh per Burner, Derated 2 Percent for Each 1000 ft Above Sea Level)*...
  • Page 54 Table 14—Model 58MTB Orifice Size and High/Low-Heat Manifold Pressures for Correct Inputs (Continued) for Use With 060 Through 120 Size Furnaces Only (Tabulated Data Based on 20,000/13,000 Btuh per Burner, Derated 2 Percent for Each 1000 ft Above Sea Level)*...
  • Page 55 for 2 percent derate for each 1000 ft above sea level. See LOW-FIRE ON/OFF ADJUSTMENT SWITCH Example and Table 15 for derate multiplier factor. ALLEN SCREW (UNDER CAP) HIGH-FIRE ADJUSTMENT EXAMPLE: ALLEN SCREW INLET (UNDER CAP) 100,000 Btuh input furnace installed at 4300 ft. PRESSURE Derate Furnace Input Rate...

  • Page 56: Set Temperature Rise

    SET TEMPERATURE RISE Table 15—Altitude Derate Multiplier for U.S.A. ALTITUDE PERCENT DERATE MULTIPLIER (FT) OF DERATE FACTOR FOR U.S.A.* UNIT DAMAGE HAZARD 0–2000 1.00 Failure to follow this caution may result in overheating the 2001–3000 4–6 0.95 heat exchangers or condensing flue gases in heat exchanger 3001–4000 6–8 0.93...

  • Page 57: Adjust Blower Off Delay (Heat Mode)

    THERMOSTAT SUBBASE Table 17–Speed Selection TERMINALS WITH THERMOSTAT REMOVED LEAD COLOR SPEED AS SHIPPED White Common HOOK-AROUND Black High Cool VOLT/AMMETER Yellow Med-High SPARE Orange† High-Gas Heat R Y W G Blue Med-Low Spare/High-Gas Heat Low* Low-Gas Heat * Continuous blower speed †...

  • Page 58: Checklist

    CHECKLIST 1. Put away tools and instruments. Clean up debris. 2. Check SW-1 through SW-3 after completing installation to ensure desired settings for thermostat type (SW-1) and blower-OFF delay (SW-2 and SW-3). 3. Verify flame rollout manual reset switch has continuity. 4.
  • Page 59 CHECKLIST—DIRECT VENT (2-PIPE) INSTALLATION LOAD CALCULATION Condensate Drain ____________ Heating Load (Btuh) ________ Unit Level or Pitched Forward ____________ Cooling Load (Btuh) Internal Tubing Connections Free of Kinks ________ and Traps ____________ Furnace Model Selection External Drain Connection Leak Tight and ________ Sloped COMBUSTION AIR AND VENT PIPING...
  • Page 60 Primary Limit ________ Pressure Switch Copyright 2005 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 58mtb1si 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 Printed in U.S.A.

Table of Contents