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

Also see for 58MTB: User's information manual Owner's manual Service and maintenance instructions

2. Inducer Housing Drain Tubea. Remove and discard LOWER (molded) inducer housingdrain tube which was previously connected to condensatetrap.b. Use inducer housing drain extension tube (violet label andfactory-supplied in loose parts bag) to connect LOWERinducer housing drain connection to the condensate trap.c. Determine appropriate length, cut, and connect tube.d. Clamp tube to prevent any condensate leakage.3. Relief Port Tubea. Connect relief port tube (green label) to condensate trap.b. Extend this tube (if required) by splicing to small diametertube (factory-supplied in loose parts bag).c. Determine appropriate length, cut, and connect tube.CONDENSATE TRAP FIELD DRAIN ATTACHMENTRefer to Condensate Drain section for recommendations andprocedures.PRESSURE SWITCH TUBINGThe LOWER collector box pressure tube (pink label) is factoryconnected to the High Pressure Switch and should not require anymodification.NOTE: See Fig. 6 or 7 or tube routing label on main furnace doorto check for proper connections.UPPER COLLECTOR BOX AND INDUCER HOUSING(UNUSED) DRAIN CONNECTIONSUpper Collector Box Drain ConnectionAttached to the UPPER collector box drain connection is afactory-installed corrugated, plugged tube (blue and white stripedlabel). This tube is plugged to prevent condensate leakage in thisapplication. Ensure this tube is plugged.NOTE: See Fig. 6 or 7 or tube routing label on main furnace doorto check for proper connections.Upper Inducer Housing Drain ConnectionAttached to the UPPER (unused) inducer housing drain connectionis a cap and clamp. This cap is used to prevent condensate leakagein this application. Ensure this connection is capped.NOTE: See Fig. 6 or 7 or tube routing label on main furnace doorto check for proper connections.CONDENSATE TRAP FREEZE PROTECTIONRefer to Condensate Drain Protection section for recommenda-tions and procedures.Step 3—Downflow ApplicationsIn a downflow furnace application, the blower is located above theburner section, and conditioned air is discharged downwards.CONDENSATE TRAP LOCATIONThe condensate trap must be removed from the factory-installedblower shelf location and relocated in selected application locationas shown in Fig. 2, 8, or 9.Fig. 6—Factory-Shipped Upflow TubeConfiguration(Shown with Blower Access Panel Removed)A01030COLLECTOR BOXTUBE (PINK)COLLECTOR BOXTUBE (GREEN)INDUCER HOUSING(MOLDED) DRAINTUBE (BEHINDCOLLECTOR BOXDRAIN TUBE)COLLECTOR BOXDRAIN TUBE (BLUE)FIELD-INSTALLEDFACTORY-SUPPLIEDDRAIN TUBECOUPLING (LEFTDRAIN OPTION)FIELD-INSTALLEDFACTORY-SUPPLIEDDRAIN TUBEFIELD-INSTALLEDFACTORY-SUPPLIED1⁄2-IN. CPVC STREETELBOWS (2) FORLEFT DRAIN OPTIONFIELD-INSTALLEDFACTORY-SUPPLIEDDRAIN TUBECOUPLING (RIGHTDRAIN OPTION)CAPCOLLECTOR BOXDRAIN TUBE (BLUE& WHITE STRIPED)PLUGCONDENSATETRAPFig. 7—Alternate Upflow Configuration and TrapLocationA01031COLLECTOR BOXTUBE (PINK)CONDENSATETRAPCOLLECTOR BOXTUBE (GREEN)COLLECTOR BOXDRAIN TUBE (BLUE)INDUCERHOUSINGDRAIN TUBE(VIOLET)CAPCOLLECTOR BOXDRAIN TUBE (BLUE& WHITE STRIPED)PLUG8