Carrier 48EZ(N)-A Installation Instructions Manual

Also see for 48EZ(N) - A: Installation instructions

Contents

8A 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 NFGC NFPA 54/ANSIZ223.1 latest edition (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 in. (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., (12.7 mm) 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 liquedfiedpetroleum gases as specified by local and/or national codes.Never use Teflon tape.4. Install sediment trap in riser leading to heating section (SeeFig. 7). 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.NOTE: 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.FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personal injury,death and/or property damage.--Connect gas pipe to unit using a backup wrench to avoiddamaging gas controls.--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 gas controlmanifold.--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.--If codes allow a flexible connector, always use a newconnector. Do not use a connector which has previouslyserviced another gas appliance.! WARNING8. Check for gas leaks at the field--installed andfactory--installed gas lines after all piping connections havebeen completed. Use a commercially available soap solutionmade specifically for the detection of leaks (or methodspecified by local codes and/or regulations).OUTTEENIPPLECAPINC99020Fig. 7 -- Sediment Trap48EZ -- A