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 47 page image

-- 47 --Roof terminations -- Locate assembly through roof toappropriate height as shown in Fig. 42.Sidewall terminations -- Locate assembly through side wall withrain shield positioned no more than 1-in. (25 mm) from wall asshown in Fig. 42.4. Disassemble loose pipe fittings. Clean and cement usingsame procedures as used for system piping.5. Check required dimensions as shown in Fig. 42.Two-Pipe Termination Kit (Direct Vent/2-Pipe System OnlyDetermine an appropriate location for termination kit using theguidelines provided in section “Vent Termination: General” inthis instruction.1. Cut 2 holes, 1 for each pipe, of appropriate size for pipesize being used.2. Loosely install elbow in bracket and place assembly oncombustion-air pipe.Roof terminations -- Loosely install pipe coupling onproperly cut vent pipe. Coupling must be positioned sobracket will mount as shown in Fig. 42.For applications using combustion-air pipe option,indicated by dashed lines in Fig. 42, install 90° streetelbow into 90° elbow, making a U-fitting. A 180° U-fittingmay be used.Sidewall terminations -- Install bracket as shown inFig. 42.For applications using vent pipe option indicated bydashed lines in Fig. 42, rotate vent elbow 90° fromposition shown in Fig. 42.3. Disassemble loose pipe fittings. Clean and cement usingsame procedures as used for system piping.4. Check required dimensions as shown in Fig. 42.Multi--venting and Vent TerminationsWhen 2 or more 58MCB Furnaces are vented near each other,each furnace must be individually vented. NEVER common ventor breach vent 58MCB furnaces.(Direct Vent/2-Pipe System ONLY) -- When 2 or more 58MCBfurnaces are vented near each other, 2 vent terminations may beinstalled as shown in Fig. 42, but next vent termination must be atleast 36 in. (914 mm) away from first 2 terminations. It isimportant that vent terminations be made as shown in Fig. 42 toavoid recirculation of flue gases.Step 11 -- Condensate DrainGENERALCondensate trap is shipped installed in the blower shelf andfactory connected for UPFLOW applications. Condensate trapmust be RELOCATED for use in DOWNFLOW andHORIZONTAL applications.Condensate trap MUST be used for all applications.An external trap is not required when connecting the field drainto this condensate trap.The field drain connection (condensate trap or drain tubecoupling) is sized for 1/2-in. (13 mm) CPVC, 1/2-in. (13 mm)PVC, or 5/8 in. (16 mm) ID tube connection.Drain pipe and fittings must conform to ANSI standards andASTM D1785, D2466 or D2846. CPVC or PVC cement mustconform to ASTM D2564 or F493. Primer must conform toASTM F656. In Canada, use CSA or ULC listed schedule 40CPVC or PVC drain pipe, fittings, and cement.When a condensate pump is required, select a pump which isapproved for condensing furnace applications. To avoidcondensate spillage, select a pump with an overflow switch.OPEN STANDPIPE FORA/C ORHUMIDIFIERDRAINTEETO OPENDRAINA94054Fig. 44 -- Example of Field Drain AttachmentFurnace condensate is mildly acidic, typically in the pH range of3.2 to 4.5. Due to corrosive nature of this condensate, acondensate pH neutralizing filter may be desired. Check withlocal authorities to determine if a pH neutralizer is required.APPLICATIONThe furnace, A/C, and humidifier drains may be combined anddrained together. The A/C drain must have an external, field-supplied trap prior to the furnace drain connection. All drainconnections (furnace, A/C, or humidifier) must be terminated intoan open or vented drain as close to the respective equipment aspossible to prevent siphoning of the equipment’s drain.See Fig. 44 for example of possible field drain attachment using1/2-in. (13 mm) CPVC or PVC tee for vent and A/C or humidifierdrain connection.Outdoor draining of the furnace is permissible if allowed by localcodes. Caution should be taken when freezing. Ambient mayfreeze drain pipe and prohibit draining.PERSONAL INJURY HAZARDCaution should be taken to prevent draining where slipperyconditions may cause personal injuries.Excessive condensate draining may cause saturated soilconditions which could result in damage to plants.! WARNINGCONDENSATE DRAIN PROTECTIONFreezing condensate left in condensate trap and drain line maycause cracks, and possible water damage may occur. If freezeprotection is required, use condensate freeze protection accessoryor equivalent 3 to 6 watt per ft at 120v and 40°F (4°C)self-regulating, shielded, and waterproof heat tape. SeeInstallation Instructions supplied with accessory or heat tapemanufacturer’s recommendations.1. Fold heat tape in half and wrap on itself 3 times.2. Locate heat tape between sides of condensate trap back.(See Fig. 45.)58MCB