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 26 page image

-- 26 --NOTE: Remove and discard bottom closure panel when bottominlet is used.Step 6 -- Bottom Closure PanelThese furnaces are shipped with bottom enclosure panel installedin bottom return-air opening. This panel MUST be in place whenside return air is used.To remove bottom closure panel, perform following:1. Tilt or raise furnace and remove 2 screws holding frontfiller panel. (See Fig. 28.)2. Rotate front filler panel downward to release holding tabs.3. Remove bottom closure panel.4. Reinstall front filler panel and screws.Step 7 -- Gas PipingGas piping must be installed in accordance with national andlocal codes. Refer to current edition of NFGC in the UnitedStates. Canadian installations must be made in accordance withNSCNGPIC and all authorities having jurisdiction.Gas supply line should be a separate line running directly frommeter to furnace, if possible. Refer to Table 5 for recommendedgas pipe sizing. Risers must be used to connect to furnace and tometer. Support all gas piping with appropriate straps, hangers,etc. Use a minimum of 1 hanger every 6 ft (1.8 M). Jointcompound (pipe dope) should be applied sparingly and only tomale threads of joints. Pipe dope must be resistant to propane gas.FILTERFILTERSUPPORTFILTERRETAINER17 1⁄2-IN. (444mm) WIDECASINGS ONLY:INSTALL FIELD-SUPPLIEDFILTER FILLER STRIPUNDER FILTER.1″24 1 /2″3″21-IN. (533mm) WIDECASINGS ONLY:SUPPORT RODS (3)EXTEND 1/4" (6mm) ONEACH SIDE OF FILTER ANDREST ON CASING FLANGE(76mm)(533mm)(25.4mm)A08605Fig. 27 -- Bottom Filter ArrangementBOTTOMCLOSUREPANELFRONT FILLERPANELA93047Fig. 28 -- Removing Bottom Closure PanelTable 5 – Maximum Capacity of Pipe *NOMINALIRON PIPESIZEIN. (MM)INTERNALDIA.IN. (MM)LENGTH OF PIPE --- FT (M)10(3.0) 20(6.0) 30(9.1) 40(12.1) 50(15.2)1/2 (12.7) 0.622(158) 175 120 97 82 733/4 (19.0) 0.824(20.9) 360 250 200 170 1511 (25.4) 1.049(26.6) 680 465 375 320 2851-1/4(31.8)1.380(35.0) 1400 950 770 660 5801-1/2(38.1)1.610(40.9) 2100 1460 1180 990 900* Cubic ft of gas per hr for gas pressures of 0.5 psig (14---in. wc) or less anda pressure drop of 0.5---in wc (based on a 0.60 specific gravity gas). Ref:Table 9.2 NFGC.FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in fire, explosion,personal injury, or death.-- Connect gas pipe to furnace using a backup wrench toavoid damaging gas controls.-- Gas valve shutoff switch MUST be facing forward ortilted upward.-- Never purge a gas line into a combustion chamber. Nevertest for gas leaks with an open flame. Use a commerciallyavailable soap solution made specifically for the detection ofleaks to check all connections.-- Use proper length of pipe to avoid stress on gascontrol manifold.-- If a flexible connector is required or allowed by authorityhaving jurisdiction, black iron pipe shall be installed atfurnace gas valve and extend a minimum of 2--in. (51 mm)outside furnace casing.-- Protect gas valve from water and debris. Gas valve inletand/or inlet piping must remain capped until gas supply lineis permanently installed to protect the valve from moistureand debris. Also, install a sediment trap in the gas supplypiping at the inlet to the gas valve.! WARNINGInstall a sediment trap in riser leading to furnace. Trap can beinstalled by connecting a tee to riser leading to furnace sostraight-through section of tee is vertical. Then connect a cappednipple into lower end of tee. Capped nipple should extend below58MCB