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

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

111 series sizes 040—120 multipoise gas-fired condensing furnace
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See also: Service and Maintenance Instructions , Installation, Start-up, and Operating Instructions Manual
Multipoise Gas-Fired Condensing Furnace
Installation, Start-Up, and Operating Instructions
SAFETY CONSIDERATIONS..................................................1-3
Dimensional Drawing ...............................................................2
Clearances to Combustibles......................................................3
INTRODUCTION.......................................................................3-4
APPLICATIONS ......................................................................4-11
General ......................................................................................4
Upflow Applications..............................................................4-6
Downflow Applications.........................................................6-8
LOCATION ............................................................................11-12
General ....................................................................................11
Hazardous Locations...............................................................12
INSTALLATION....................................................................12-16
Leveling Legs (If Desired)................................................12-13
Installation On a Concrete Slab .............................................13
Applications)......................................................................13
Installation In Horizontal Applications ..................................14
Filter Arrangement ............................................................14-15
Bottom Closure Panel.............................................................15
Gas Piping..........................................................................15-19
ELECTRICAL CONNECTIONS...........................................16-17
115-v Wiring......................................................................16-17
24-v Wiring.............................................................................19
Accessories..............................................................................19
DIRECT VENTING ...............................................................19-25
Common Vent Systems.....................................................20
Combustion-Air and Vent Piping .....................................20-23
Kit Installation..............................................................23-24
CONDENSATE DRAIN ........................................................25-29
General ....................................................................................25
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. 565-906
Tab 6a 8a
For Sizes 040-120 Series 111
A93040
Page
Printed in U.S.A.
58MCA, 58MXA
®
Fig. 1-Multipoise Orientations
Application.........................................................................26-28
Condensate Drain Protection.............................................28-29
SEQUENCE OF OPERATION..............................................29-31
Heating Mode ....................................................................29-30
Cooling Mode .........................................................................30
Continuous Blower Mode.......................................................30
Heat Pump Mode ....................................................................30
Component Test.................................................................30-31
START-UP PROCEDURES ..................................................31-35
General ....................................................................................31
Prime Condensate Trap With Water ......................................31
Purge Gas Lines......................................................................31
Adjustments .......................................................................31-33
Set Gas Input Rate ............................................................31-33
Set Temperature Rise ........................................................33-35
Adjust Blower Off Delay (Heat Mode) .................................35
Set Thermostat Heat Anticipator............................................35
CHECK SAFETY CONTROLS..................................................35
Check Primary Limit Control.................................................35
Check Pressure Switch ...........................................................35
CHECKLIST...........................................................................35-36
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
Form 58MXA-2SI
Pg 1
ama
A PP R O VED
R
A93041
6-94
Replaces: 58MXA-1SI

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Summary of Contents for Carrier 58MCA

  • Page 1: Table Of Contents

    58MCA, 58MXA Multipoise Gas-Fired Condensing Furnace Installation, Start-Up, and Operating Instructions For Sizes 040—120 Series 111 ® A PP R O VED A93040 NOTE: Read the entire instruction manual before starting the installation. Index Page SAFETY CONSIDERATIONS..........1-3 Dimensional Drawing ...............2 Clearances to Combustibles............3...

  • Page 3: Clearances To Combustibles

    Inducer housing drain tube..........1 1/2-in. CPVC street elbow ..........2 INTRODUCTION Drain tube coupling.............1 The 58MCA and 58MXA Multipoise Condensing Gas-Fired Drain tube coupling grommet ..........1 Furnaces are A.G.A./C.G.A. certified for natural and propane Vent and combustion-air pipe support........2 gases and for installation in alcoves, attics, basements, closets, Combustion-air pipe perforated disk assembly ....1...

  • Page 4: Applications

    Before installing the furnace in the United States, refer to the CONDENSATE TRAP TUBING (FACTORY-SHIPPED ORIEN- current edition of the NFGC. For further information, the NFGC is TATION) available from National Fire Protection Association Inc., Battery- NOTE: See Fig. 5 or tube routing label on main furnace door to march Park, Quincy, MA 02269, American Gas Association, 1515 confirm location of these tubes.

  • Page 5: Upflow Applications

    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 APPLICATIONS EXTERNAL UPFLOW APPLICATIONS...

  • Page 6: Downflow Applications

    PLUG COLLECTOR BOX DRAIN TUBE (BLUE & WHITE STRIPED) COLLECTOR BOX TUBE (PINK) PLUG COLLECTOR BOX COLLECTOR BOX TUBE (GREEN) DRAIN TUBE (BLUE & WHITE STRIPED) COLLECTOR BOX INDUCER HOUSING TUBE (PINK) (MOLDED) DRAIN TUBE (BEHIND COLLECTOR BOX DRAIN TUBE) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX...
  • Page 7 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 8: Horizontal Left (Supply-Air Discharge) Applications

    NOTE: The auxiliary junction box (J-Box) MUST be relocated to 2. Use small diameter tube (factory supplied in loose parts bag) to extend collector box pressure tube (green label) which was opposite side of furnace casing. (See Fig. 9.) See Electrical previously connected to condensate trap relief port connec- Connection section for J-Box relocation.

  • Page 9: Horizontal Right (Supply-Air Discharge) Applications

    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 10 COLLECTOR BOX DRAIN TUBE (BLUE) COLLECTOR BOX TUBE (GREEN) COLLECTOR BOX EXTENSION TUBE PLUG COLLECTOR BOX TUBE (PINK) CONDENSATE TRAP COLLECTOR BOX DRAIN TUBE (BLUE AND WHITE STRIPED) INDUCER HOUSING DRAIN TUBE (VIOLET) COLLECTOR BOX EXTENSION TUBE A93303 Fig. 11—Horizontal Right Tube Configuration b.

  • Page 11: Location

    or HORIZONTAL LEFT applications. This tube MUST be dis- connected and used for the condensate trap relief port tube. The other collector box pressure tube (green label) which was factory connected to the condensate trap relief port connection MUST be connected to the pressure switch in DOWNFLOW or HORIZON- TAL RIGHT applications.

  • Page 12: Hazardous Locations

    Step 3—Hazardous Locations FRONT BACK FRONT A93043 A93044 Do not install furnace on its back. Safety control operation When furnace is installed in a residential garage, it must be installed so that burners and ignition sources are located a will be adversely affected. Never connect return-air ducts to back of furnace.

  • Page 13: Installation On A Concrete Slab

    3. Install another nut on other side of furnace base. (Install flat washer if desired.) 4. Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement. NOTE: Bottom closure must be used when leveling legs are used. See Bottom Closure Panel section.

  • Page 14: Installation In Horizontal Applications

    Step 4—Installation in Horizontal Applications These furnaces can be installed horizontally in either horizontal left or right discharge position. In a crawlspace, furnace can either be hung from floor joist or installed on suitable blocks or pad. Furnace can be suspended from each corner by hanger bolts. (See FURNACE (OR COIL CASING Fig.

  • Page 15: Bottom Closure Panel

    location, and quantity shipped with this furnace. See Fig. 2 for location and size of bottom and side return-air openings. 3 ″ Table 1—Filter Information ″ FURNACE FILTER SIZE (IN.)* FILTER TYPE CASING FRAMED Side Return Bottom Return WIDTH (IN.) 1 ″...

  • Page 16: Electrical Connections

    Gas valve knob MUST be facing forward or tilted upward. If a flexible connector is required or allowed by authority Failure to follow this warning could result in property damage having jurisdiction, black iron pipe shall be installed at gas or death.

  • Page 17: Gas Piping

    FIELD 24-VOLT WIRING FIELD 115-, 208/230-, 460-VOLT WIRING FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING THERMOSTAT FOUR FIELD-SUPPLIED TERMINALS WIRE FUSED DISCONNECT TWO-WIRE 208/230- OR HEATING- 460-VOLT ONLY THREE PHASE 208/230- VOLT SINGLE AUXILIARY 115-VOLT FIELD- PHASE J-BOX SUPPLIED CONTROL FUSED CONDENSING DISCONNECT UNIT...

  • Page 19: 24-V Wiring

    The 58MCA and 58MXA Furnaces require a dedicated (one operation. The 24-v terminal board is marked for easy connection 58MCA or one 58MXA furnace only) direct vent system. In a of field wiring. (See Fig. 23.) The 24-v circuit contains a 3-amp, direct vent system, all air for combustion is taken directly from automotive-type fuse located on control center.

  • Page 20: Removal Of Existing Furnaces From Common Vent Systems

    ‡ 36 in. to electric meter in Canada only. dampers, any other gas burning appliances to their previous NOTES: 1. If installing 2 adjacent 58MCA or 58MXA Furnaces, refer to Multi-Venting condition of use. and Vent Terminations section for proper vent configurations.
  • Page 21 Combustion air must not be taken from inside structure because that air is frequently contaminated by halogens, FURNACE which include fluorides, chlorides, bromides, and iodides. These elements are found in aerosols, detergents, bleaches, cleaning solvents, salts, air fresheners, adhesives, paint, and other household products.
  • Page 22 12 ″ MIN 12 ″ MIN VENT PIPE VENT PIPE COMBUSTION-AIR PIPE COMBUSTION-AIR PIPE HORIZONTAL TO ROOF HORIZONTAL TO SIDEWALL COMBUSTION-AIR PIPE VENT PIPE COMBUSTION-AIR PIPE 12 ″ MIN 12 ″ MIN VENT PIPE VERTICAL TO ROOF VERTICAL TO SIDEWALL NOTE: A 12 In.

  • Page 23: Concentric Vent And Combustion-Air Termination Kit Installation

    8. After pipes have been cut and preassembled, apply generous COMBUSTION – AIR layer of cement primer to pipe fitting socket and end of pipe INTAKE HOUSING 3/8 ID TUBE BURNER to insertion mark. Quickly apply approved cement to end of pipe and fitting socket (over primer).

  • Page 24: Multiventing And Vent Termination Furnace

    58MCA or 58MXA furnaces. When CONCENTRIC VENT/AIR TERMINATION KIT 2 or more 58MCA or 58MXA furnaces are vented near each other, 1. Determine location for termination. 2 vent terminations may be installed as shown in Fig. 36, 37, 38, 39, or 40, but next vent termination must be at least 36 in.

  • Page 25: Condensate Drain

    OVERHANG OR ROOF 12″ MINIMUM 1″ MAXIMUM VENT COMBUSTION-AIR VENT COMBUSTION MAINTAIN 12 IN. MAINTAIN 12 IN. CLEARANCE (18 IN. FOR CANADA) ABOVE HIGHEST MINIMUM CLEARANCE ANTICIPATED SNOW ABOVE HIGHEST LEVEL OR GRADE, ANTICIPATED SNOW WHICHEVER IS LEVEL. MAXIMUM OF GREATER.

  • Page 26: Application

    Step 2—Application The furnace, A/C, and humidifier drains may be combined and drained together. The A/C drain must have an external, field- supplied trap prior to the furnace drain connection. All drain connections (furnace, A/C, or humidifier) must be terminated into an open or vented drain as close to the respective equipment as possible to prevent siphoning of the equipment’s drain.
  • Page 27 Table 5—Maximum Allowable Pipe Length (Ft) PIPE NUMBER OF 90° ELBOWS TERMINATION ALTITUDE UNIT SIZE DIAMETER TYPE (IN.)* 040-08 2 Pipe or 2-In. 1-1/2 040-12 Concentric 1-1/2 060-12 2 Pipe or 2-In. 060-16 Concentric 1-1/2 080-12 2 Pipe or 2-In. 080-16 Concentric 080-20...

  • Page 28: Condensate Drain Protection

    PIPE NUMBER OF 90° ELBOWS TERMINATION ALTITUDE UNIT SIZE DIAMETER TYPE (IN.)* 1-1/2 040-08 2 Pipe or 2-In. 040-12 Concentric 1-1/2 060-12 2 Pipe or 2-In. 060-16 Concentric 080-12 2 Pipe or 2-In. 6001 to 7000‡ 080-16 Concentric 2-1/2 080-20 2-1/2 100-16 2 Pipe or 3-In.

  • Page 29: Sequence Of Operation

    Table 6—Maximum Allowable Exposed Vent Pipe Length (Ft) With Insulation in Winter Design Temperature Ambient* WINTER INSULATION THICKNESS (IN.)† UNIT MAX PIPE DESIGN SIZE DIAMETER TEMPERATURE(°F) 1-1/2 1-1/2 1-1/2 2-1/2 2-1/2 2-1/2 * 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 5.

  • Page 30: Cooling Mode

    3. Ignition sequence—When ignitor warm-up period is com- When R-W thermostat call disappears, control completes inducer pleted, gas valve opens, permitting gas flow to burners where post-purge period (15 sec) and changes to cooling speed after a it is ignited. After 5 sec, ignitor is de-energized and a 2-sec 2-sec delay.

  • Page 31: Start-Up Procedures

    Obtain average yearly specific gravity for local gas supply. c. Verify furnace model. Table 7 can only be used for model 58MCA or 58MXA furnaces. d. Find natural gas heat value and specific gravity in Table 7. e. Follow heat value line and specific gravity line to point of...
  • Page 32 A94208 A94209 Fig. 43—Inducer Housing Drain Tube Fig. 44—Filling Condensate Trap EXAMPLE: EXAMPLE: Heating value = 1010 Btu/cu ft Btu heating input = Btu/cu ft X cu ft/hr Specific gravity = 0.62 Therefore: Orifice No. 44* with Heating value of gas = 1010 Btu/cu ft manifold pressure 3.3-in.

  • Page 33: Adjustments

    Table 7—Model 58MCA or 58MXA Orifice Size and Manifold Pressure for Correct Input Rate (Tabulated Data Based on Altitude Up to 2000 Ft and 20,000 Btuh Per Burner) 0.56 0.58 0.60 0.62 0.64 0.66 0.68 0.70 0.72 GAS HEAT VALUE...
  • Page 34 Table 8—Gas Rate Cu Ft/Hr REGULATOR ADJUSTMENT MANUAL SIZE OF TEST DIAL SIZE OF TEST DIAL SECONDS SECONDS ON/OFF FOR 1 FOR 1 BURNER ENCLOSURE REVOLUTION REVOLUTION cu ft cu ft cu ft cu ft cu ft cu ft REFERENCE 1800 PRESSURE 1636...

  • Page 35: Adjust Blower Off Delay (Heat Mode)

    Table 9–Speed Selector 5 minutes. As soon as limit control has shut off burners, return-air opening should be unblocked to permit normal air circulation. By COLOR SPEED FACTORY ATTACHED TO using this method to check limit control, it can be established that Black High Cool...
  • Page 36 Over Ceilings ________ Low-Ambient Exposed Pipes Copyright 1994 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 35031c Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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