ICP PGN324 Installation Instructions Manual

Contents

9Use only pipe dope that is resistant to action of liquefiedpetroleum gases as specified by local and/or nationalcodes. Never use Teflon tape.4. Install sediment trap in riser leading to heating section(See Fig. 7). This drip leg functions as a trap for dirt andcondensate.5. Install an accessible, external, manual main shutoffvalve in gas supply pipe within 6 ft (1829mm) of heatingsection.6. Install ground--joint union close to heating sectionbetween unit manual shutoff and external manual mainshut--off valve.7. Pressure test all gas piping in accordance with localand national plumbing and gas codes beforeconnecting piping to unit.8. Check for gas leaks at the field--installed andfactory--installed gas lines after all piping connectionshave been completed. Use soap--and--water solution(or method specified by local codes and/or regulations).FIGURE 7 Sediment TrapOUTTEENIPPLECAPINNOTE: Pressure test the gas supply system after the gassupply piping is connected to the gas valve. The supplypiping must be disconnected from the gas valve during thetesting of the piping systems when test pressure is inexcess of 0.5 psig. Pressure test the gas supply pipingsystem at pressures equal to or less than 0.5 psig. The unitheating section must be isolated from the gas piping systemby closing the external main manual shutoff valve andslightly opening the ground--joint union.Table 1—PIPING SIZESNOMINALIRON PIPESIZE (IN.)INTERNALDIAMETER(IN.)LENGTH OF PIPE (FT)†10 20 30 40 50 60 70 80 90 100 125 150 175 2001/2 .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. wc (based on a 0.60 specificgravity gas). Refer to Table, National Fire Protection Association NFPA 54.{ This length includes an ordinary number of fittings.FIRE OR EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, 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.Never test for gas leaks with an open flame. Use acommercially available soap solution made specifically forthe detection of leaks 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. (51mm)outside furnace casing.--If codes allow a flexible connector, always use a newconnector. do not use a connector which has previouslyserviced another gas appliance.! WARNING