Carrier GAS FURNACE 58MXA Operations Instructions

58MCA, 58MXAMultipoise Gas-Fired Condensing FurnaceInstallation, Start-Up, and Operating InstructionsFor Sizes 040—120 Series 111NOTE: Read the entire

CONDENSATE TRAP TUBINGNOTE: See Fig. 11 or tube routing label on main furnace door tocheck for proper connections.1. Collector Box Drain Tubea. Remove

5. Route this extended tube (pink label) to condensate trap reliefport connection.6. Determine appropriate length, cut, and connect tube.7. Clamp tube

Provide ample space for servicing and cleaning. Always complywith minimum fire protection clearances shown on units clearanceto combustibles label. (S

2. For each hole, install nut on bolt and then install bolt and nutin hole. (Install flat washer if desired.)3. Install another nut on other side of f

Do not bend duct flanges inward as shown in Fig. 15. Thiswill affect airflow across heat exchangers and may causelimited cycling or premature heat exc

Step 5—Filter ArrangementNever operate unit without a filter or with blower accesspanel removed.Factory-supplied washable framed filters are shipped i

having jurisdiction. Gas supply line should be a separate linerunning directly from meter to furnace, if possible. Refer to Table2 for recommended gas

NOTE: Proper polarity must be maintained for 115-v wiring. Ifpolarity is incorrect, control center fault code indicator light willflash rapidly and fu

If manual disconnect switch is to be mounted on furnace,select a location where a drill or fastener will not contactelectrical or gas components.Step

→ Fig. 24—Wiring DiagramA93050PCBBLOWER OFF DELAYSELECTION CHART90 SEC135 SEC180 SEC225 SECGVRHI/LORELAYSEC-1SEC-2WHTPL13216549 8 7LEDTEST/TWINBLOWERO

Fig. 2—Dimensional DrawingDimensions (In.)UNIT SIZE A D E040-08 17-1/2 15-7/8 16040-12 17-1/2 15-7/8 16060-12 17-1/2 15-7/8 16060-16 17-1/2 15-7/8 160

Furnace combustion-air and vent pipe connections must be at-tached as shown in Fig 28. Combustion-air intake plug fitting andinducer housing alternate

Combustion air must not be taken from inside structurebecause inside air is frequently contaminated by halogens,which include fluorides, chlorides, br

a. Determine location of combustion-air intake pipe connec-tion to combustion-air intake housing as shown in Fig. 28for application.b. Reposition comb

Table 5—Maximum Allowable Pipe Length (Ft)ALTITUDE UNIT SIZETERMINATIONTYPEPIPEDIAMETER(IN.)*NUMBER OF 90° ELBOWS1 2 3 4 5 60 to 2000040-08040-122 Pip

a. Determine location of vent pipe connection to inducerhousing as shown in Fig. 28 for application.b. Reposition neoprene inducer housing outlet cap

d. Insert 2-in. diameter pipe into inducer housing throughneoprene coupling and clamp in inducer housing. Tightenclamp.Vent pipe must be installed and

Fig. 34—Sidewall Termination of 12 in. or MoreA87225MAINTAIN 12 IN.CLEARANCEABOVE HIGHESTANTICIPATED SNOWLEVEL OR GRADE,WHICHEVER ISGREATER

e. Termination kit should be positioned where vent vapors arenot objectionable.2. Cut 2 holes, 1 for each pipe, of appropriate size for pipe sizebeing

Fig. 39—Sidewall Termination of 12 in. or Less(Dimension "A" is Touching or 2-In.Maximum Separation)A85184ACOMBUSTION AIRCOMBUSTION AIRVEN

Drain pipe and fittings must conform to ANSI standards andASTM D1785 or D2846. CPVC or PVC cement and primer mustconform to ASTM D2564 or F493. In Can

SAFETY CONSIDERATIONSInstalling and servicing heating equipment can be hazardous due togas and electrical components. Only trained and qualified perso

SEQUENCE OF OPERATIONFurnace control must be grounded for proper operation, orcontrol will lockout. Control is grounded through green wirerouted to ga

6. When above items have been completed, the following willoccur:a. LED flashes a fault code 4 times. Record this fault code forfurther troubleshootin

EXAMPLE:Heating value = 1010 Btu/cu ftSpecific gravity = 0.62Therefore: Orifice No. 44*Manifold pressure 3.3-in. wc* Furnace is shipped with No. 45 or

than 3.2-in. wc or more than 3.8-in. wc for natural gas.Make any major adjustments by changing main burnerorifices.NOTE: If orifice hole appears damag

SET TEMPERATURE RISETemperature rise must be within limits specified on unitrating plate. Recommended operation is at midpoint of rise orabove. Failur

Disconnect 115-v electrical power before changing speed tap.Failure to follow this warning could result in personal injury.4. To change blower motor s

CHECKLIST—INSTALLATIONLoad Calculation____________ Heating Load (Btuh)____________ Cooling Load (Btuh)____________ Furnace Model SelectionCOMBUSTION A

6. Before removing a new control from its container, dischargeyour body’s electrostatic charge to ground to protect thecontrol from damage. If the con

a. Determine location of field drain connection. (See Fig. 2 or5.)NOTE: If internal filter is used, drain tube should be located toopposite side of ca

1. Collector Box Drain TubeConnect collector box drain tube (blue label) to condensatetrap.NOTE: On 17-1/2-in. wide furnaces ONLY, cut tube betweencor

Step 3—Downflow ApplicationsA downflow furnace application is where furnace blower is locatedabove combustion and controls section of furnace and cond

d. Use inducer housing drain tube (violet label and factorysupplied in loose parts bag) to connect LOWER inducerhousing drain connection to the conden

A horizontal left furnace application is where furnace blower islocated to the right of combustion and controls section of furnaceand conditioned air