Carrier Performance 48VR-A Installation Instructions Manual

Also see for Performance 15 48VR-A: Owner's information manual Owner's information manual

Contents

11latest revision. Refer to Provincial and local plumbing orwastewater codes and other applicable local codes.2. Remove flue hood from shipping location (inside the returnsection of the blower compartment--see Fig. 9). Remove thereturn duct cover to locate the flue hood. Place flue hoodassembly over flue panel. Orient screw holes in flue hoodwith holes in the flue panel.3. Secure flue hood to flue panel by inserting a single screw onthe top flange and the bottom flange of the hood.Step 8 — Install Gas PipingThe gas supply pipe enters the unit through the access holeprovided. The gas connection to the unit is made to the 1/2--in.(12.7 mm) FPT gas inlet on the gas valve.Install a gas supply line that runs to the heating section. Refer tothe NFGC for gas pipe sizing. Do not use cast--iron pipe. It isrecommended that a black iron pipe is used. Check the local utilityfor recommendations concerning existing lines. Size gas supplypiping for 0.5 IN. W.C. maximum pressure drop. Never use pipesmaller than the 1/2--in. (12.7 mm) FPT gas inlet on the unit gasvalve.For natural gas applications, the gas pressure at unit gas connectionmust not be less than 4.0 IN. W.C. or greater than 13 IN. W.C.while the unit is operating. For propane applications, the gaspressure must not be less than 11.0 IN. W.C. or greater than 13 IN.W.C. at the unit connection.A 1/8--in. (3.2 mm) NPT plugged tapping, accessible for test gaugeconnection, must be installed immediately upstream of the gassupply connection to the gas valve.When installing the gas supply line, observe local codes pertainingto gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 latestedition (in Canada, CAN/CGA B149.1).NOTE: In the state of Massachusetts:1. Gas supply connections MUST be performed by a licensedplumber or gas fitter.2. When flexible connectors are used, the maximum lengthshall not exceed 36 inches (915 mm).3. When lever handle type manual equipment shutoff valvesare used, they shall be T--handle valves.4. The use of copper tubing for gas piping is NOT approvedby the state of Massachusetts.In the absence of local building codes, adhere to the followingpertinent recommendations:1. Avoid low spots in long runs of pipe. Grade all pipe 1/4 in.(6.35 mm) for every 15 ft (4.6 m) of length to prevent traps.Grade all horizontal runs downward to risers. Use risers toconnect to heating section and to meter.2. Protect all segments of piping system against physical andthermal damage. Support all piping with appropriate straps,hangers, etc. Use a minimum of one hanger every 6 ft (1.8m). For pipe sizes larger than 1/2 in., followrecommendations of national codes.3. Apply joint compound (pipe dope) sparingly and only tomale threads of joint when making pipe connections. Useonly pipe dope that is resistant to action of liquefiedpetroleum gases as specified by local and/or national codes.Never use Teflon tape.4. Install sediment trap in riser leading to heating section (SeeFig. 8). This drip leg functions as a trap for dirt andcondensate.5. Install an accessible, external, manual main shutoff valve ingas supply pipe within 6 ft (1.8 m) of heating section.6. Install ground--joint union close to heating section betweenunit manual shutoff and external manual main shut--offvalve.7. Pressure test all gas piping in accordance with local andnational plumbing and gas codes before connecting pipingto unit.OUTTEENIPPLECAPINC99020Fig. 8 -- Sediment TrapNOTE: Pressure test the gas supply system after the gas supplypiping is connected to the gas valve. The supply piping must bedisconnected from the gas valve during the testing of the pipingsystems when test pressure is in excess of 0.5 psig. Pressure test thegas supply piping system at pressures equal to or less than 0.5 psig.The unit heating section must be isolated from the gas pipingsystem by closing the external main manual shutoff valve andslightly opening the ground--joint union.Table 2 – Maximum Gas Flow Capacity*NOMINALIRON PIPESIZE (IN.)INTERNALDIAMETER(IN.)LENGTH OF PIPE FT (m)†10(3)20(6)30(9)40(12)50(15)60(18)70(21)80(24)90(27)100(30)125(38)150(46)175(53)200(61)1/2 .622 175 120 97 82 73 66 61 57 53 50 44 40 — —3/4 .824 360 250 200 170 151 138 125 118 110 103 93 84 77 721 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 1351--- 1/4 1.380 1400 950 770 600 580 530 490 460 430 400 360 325 300 2801--- 1/2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5 ---IN. W.C. (based on a 0.60 specific gravity gas). Refer to Table 2and National Fuel Gas Code NFPA 54/ANSI Z223.1.{ This length includes an ordinary number of fittings.48VR-- A