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

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Carrier 58MCA Installation, Start-up, And Operating Instructions Manual Manual pdf 8 page image

1. Remove 3 tubes connected to condensate trap.2. Remove trap from blower shelf by gently pushing tabs inwardand rotating trap.3. Remove casing hole filler cap from casing hole. (See Fig. 2, 7,or 8.)4. Install casing hole filler cap into blower shelf hole where trapwas removed.5. Install condensate trap into desired casing hole by insertingtube connection stubs through casing hole and rotating untiltabs snap into locking position.CONDENSATE TRAP TUBINGNOTE: See Fig. 7 or 8 or tube routing label on main furnace doorto check for proper connections.1. Collector Box Drain Tubea. Remove factory-installed plug from LOWER collector boxdrain tube (blue and white striped label).b. Install removed clamp and plug into UPPER collector boxdrain tube (blue label) which was connected to condensatetrap.c. Connect LOWER collector box drain connection to con-densate trap.(1.) Condensate Trap Located on Left Side of Casing(a.) Connect LOWER collector box drain tube (blueand white striped label) to condensate trap. Tubedoes not need to be cut.(b.) Clamp tube to prevent any condensate leakage.(2.) Condensate Trap Located on Right Side of Casing(a.) Install drain tube coupling (factory-supplied inloose parts bag) into collector box drain tube(blue and white striped label) which was previ-ously plugged.(b.) Connect larger diameter drain tube (factory-supplied in loose parts bag) to drain tube cou-pling, extending collector box drain tube forconnection to condensate trap.(c.) Route extended collector box drain tube directlyfrom collector box drain to condensate trap asshown in Fig. 8.(d.) Determine appropriate length and cut.(e.) Connect to condensate trap.(f.) Clamp tube to prevent any condensate leakage.2. Inducer Housing Drain Tubea. Remove factory-installed cap and clamp from LOWERinducer housing drain connection.b. Remove and discard UPPER (molded) inducer housingdrain tube which was previously connected to condensatetrap.c. Install cap and clamp on UPPER inducer housing drainconnection where molded drain tube was removed.d. Use inducer housing drain tube (violet label and factory-supplied in loose parts bag) to connect LOWER inducerhousing drain connection to the condensate trap.e. Connect inducer housing drain connection to condensatetrap.(1.) Condensate Trap Located on Left Side of Casing(a.) Determine appropriate length and cut.(b.) Connect tube to condensate trap.(c.) Clamp tube to prevent any condensate leakage.(2.) Condensate Trap Located on Right Side of Casing(a.) Route inducer housing drain tube (violet label)directly from inducer housing to condensate trapas shown in Fig. 8.(b.) Determine appropriate length and cut.(c.) Connect tube to condensate trap.(d.) Clamp tube to prevent any condensate leakage.3. Relief Port TubeRefer to Pressure Switch Tubing section for connectionprocedure.CONDENSATE TRAP FIELD DRAIN ATTACHMENTRefer to Condensate Drain section for recommendations andprocedures.PRESSURE SWITCH TUBINGOne collector box pressure tube (pink label) is factory connected tothe pressure switch for use when furnace is installed in UPFLOWapplications. This tube MUST be disconnected and used for thecondensate trap relief port tube. The other collector box pressuretube (green label) which was factory connected to the condensatetrap relief port connection MUST be connected to the pressureswitch in DOWNFLOW or HORIZONTAL RIGHT applications.NOTE: See Fig. 7 or 8 or tube routing label on main furnace doorto check for proper connections.Relocate tubes as described below.1. Disconnect collector box pressure tube (pink label) attached topressure switch.2. Extend collector box pressure tube (green label) which waspreviously connected to condensate trap relief port connectionby splicing to small diameter tube (factory-supplied in looseparts bag).3. Connect collector box pressure tube (green label) to pressureswitch connection labeled COLLECTOR BOX.4. Extend collector box pressure tube (pink label) which waspreviously connected to pressure switch by splicing to remain-ing small diameter tube (factory-supplied in loose parts bag).5. Route this extended tube (pink label) to condensate trap reliefport connection.6. Determine appropriate length, cut, and connect tube.7. Clamp tube to relief port connection.CONDENSATE TRAP FREEZE PROTECTIONRefer to Condensate Drain Protection section for recommenda-tions and procedures.Step 4—Horizontal Left (Supply-Air Discharge)ApplicationsA horizontal left furnace application is where furnace blower islocated to the right of combustion and controls section of furnace,and conditioned air is discharged to the left.Local codes may require a drain pan under entire furnace andcondensate trap when a condensing furnace is used in an atticapplication or over a finished ceiling.NOTE: In Canada, installations shall be in accordance withcurrent NSCNGPIC and/or local codes.NOTE: The auxiliary junction box (J-Box) MUST be relocated toopposite side of furnace casing. (See Fig. 9.) See ElectricalConnection section for J-Box relocation.8