Carrier 58MCB Nstallation, Start-up, And Operating Instructions

Also see for 58MCB: User's information manual Service and maintenance instructions Owner's manual Service and maintenance instruction Installation, start-up, and operating instructions

Carrier 58MCB Nstallation, Start-up, And Operating Instructions Manual pdf 16 page image

-- 16 --UPFLOW OR DOWNFLOWHORIZONTALFRONT FRONTLEVEL (0”)TO 1/2” (13mm)MAX MIN 1/4” (7mm)TO 1/2” (13mm)MAXA02146Fig. 14 -- Furnace Location for Proper Condensate DrainagePRESSURE SWITCH TUBINGOne collector box pressure tube (pink label) is factory connectedto the pressure switch for use when furnace is installed inUPFLOW applications. This tube MUST be disconnected andused for the condensate trap relief port tube. The other collectorbox pressure tube (green label) which was factory connected tothe condensate trap relief port connection MUST be connected tothe pressure switch in DOWNFLOW or HORIZONTALRIGHT applications.NOTE: See Fig. 13 or tube routing label on main furnace door tocheck for proper connections.Relocate tubes as described below:1. Disconnect collector box pressure tube (pink label)attached to pressure switch.2. Extend collector box pressure tube (green label) whichwas previously connected to condensate trap relief portconnection by splicing to small diameter tube(factory-supplied in loose parts bag).3. Route extended collector box pressure tube behind inducermotor bracket then between inducer motor andpressure switch.4. Connect collector box pressure tube (green label) topressure switch connection labeled COLLECTOR BOX.5. Use remaining smaller diameter tube (factory-supplied inloose parts bag) to extend collector box pressure tube(pink label) which was previously connected topressure switch.6. Route this extended tube (pink label) to condensate traprelief port connection.7. Determine appropriate length, cut, and connect tube.8. Clamp tube to relief port connection.CONDENSATE TRAP FREEZE PROTECTIONRefer to Condensate Drain Protection section forrecommendations and procedures.CONSTRUCT A WORKING PLATFORMConstruct working platform where all required furnace clearancesare met. (See Fig. 3 and 11 or 12.)FRONTBACKFRONTBACKA93043Fig. 15 -- Installation on Back is ProhibitedUNIT MAY NOT OPERATEFailure to follow this caution may result in intermittentunit operation.The condensate trap MUST be installed below furnace. SeeFig. 5 for dimensions. The drain connection to condensatetrap must also be properly sloped to an open drain.CAUTION!NOTE: Vent pipe(s) and combustion-air pipe (when applicable)are restricted to a minimum length of 5 ft. (See Table 11.)NOTE: A 12-in. (305 mm) minimum offset pipe section isrecommended with short (5 to 8 ft) vent systems. Thisrecommendation is to reduce excessive condensate droplets fromexisting vent pipe. (See Fig. 11, 12 or 41.)NOTE: The 140 size unit may NOT be installed in non-directvent (1-pipe) application.LOCATIONStep 1 -- GeneralThis furnace mustS be installed so the electrical components are protectedfrom water.S not be installed directly on any combustible material other thanwood flooring (refer to SAFETY CONSIDERATIONS).S be located so combustion-air and vent pipe maximum lengthsare not exceeded. Refer to Table 11.S be located where available electric power and gas suppliesmeet specifications on the furnace rating plate.S be attached to an air distribution system and be located as closeto the center of the distribution system as possible. Refer to AirDucts section.S be provided with ample space for servicing and cleaning.Always comply with minimum fire protection clearancesshown on the furnace clearance to combustibles label.NOTE: For upflow/downflow applications install furnace so thatit is level or pitched forward within 1/2-in. (13 mm) for properfurnace operation. For horizontal applications pitch 1/4-in. (6mm) minimum to 1/2-in. (13 mm)maximum forward to ensureproper condensate drainage from secondary heat exchangers.(See Fig. 14.)58MCB