Raypak XTherm 1005A Installation And Operation Manual

Also see for Xtherm 1005A: Installation & operating instructions

223.11.1. Gas Supply ConnectionAA CAUTION: The heater must be disconnected from thegas supply during any pressure testing of the gas supplysystem at test pressures in excess of 1/2 psi (3.45 kPa).During any pressure testing of the gas supply pipingsystem at test pressures of 1/2 psi (3.45 kPa), or less, theheater must be isolated from the gas supply piping systemby closing the upstream manual shut-off valve. Relievetest pressure in the gas supply line prior to re-connectingthe heater and its manual shut-off valve to the gas supplyline. FAILURE TO FOLLOW THIS PROCEDURE MAYDAMAGE THE GAS VALVE.Over-pressurized gas valves are not covered by warranty.The heater and its gas connections shall be leak-testedbefore placing the appliance in operation. Use soapywater for leak test. DO NOT use an open flame.MUST BE SUPPLIED BY INSTALLERMANUAL BALL VALVEUNIONELBOWWRENCHING NIPPLESEDIMENT TRAP REAR JACKETZERO GOVERNORON/OFF COMBO VALVEMANUAL SHUTOFFVALVESTREETELBOW 1"Figure 23. Gas Supply ConnectionAA CAUTION: Only sealant tape or a pipe compound ratedfor use with natural and propane gases is recommended.Apply sparingly only on male pipe ends, leaving the twoend threads bare.AA CAUTION: Support gas supply piping with hangers,not by the heater or its accessories. Make sure the gaspiping is protected from physical damage and freezing,where required.3.11.2. Gas Supply PressureA minimum of 4" WC and a maximum of 10.5" WC gaspressure is required under load and no-load conditionsfor natural gas at the heater. A minimum of 4" WC and amaximum of 13" WC is required for propane gas at theheater. The gas pressure regulator(s) supplied on theheater is for low-pressure service. If upstream pressureexceeds these values, an intermediate gas pressureregulator, of the lockup type, must be installed.When connecting additional gas utilization equipmentto the gas piping system, the existing piping must bechecked to determine if it has adequate capacity for thecombined load.AA CAUTION: For proper operation, no more than a 30%drop in gas supply pressure from no-load to full-loadconditions is acceptable. Under no circumstances shouldthe pressure be outside the listed operational range.When connecting additional gas utilization equipmentto the gas piping system, the existing piping must bechecked to determine if it has adequate capacity for thecombined load.The gas valve pressure regulator on the heater is nominallypreset as noted in Table N.During normal operation, carbon dioxide should be9.0% ± 0.5% at full fire for natural gas and 10.2% ± 0.5%for propane gas. Carbon monoxide should be less than100ppm.ModelNo.1-1/4" NPT 1-1/2"NPT 2" NPT 2-1/2"NPTN P N P N P N P1005A 35(10)55(17)35(10)90(27)125(38)300(91)300(91)1505A 10(3)15(5)15(5)25(7)60(18)150(46)150(46)275(84)2005A 35(10)90(27)85(26)210(64)Natural Gas – 1,000 BTU/ft3, 0.60 specific gravity at 0.5". WC pressure drop.Propane Gas – 2,500 BTU/ft3, 1.53 specific gravity at 0.6" WC pressure drop.Table M. Maximum Equivalent Gas Pipe Length (ft./m)Model No.Manifold Gas Pressure(High Fire Values)Natural Gas Propane Gas1005A -4.6 -6.61505A -7.1 -8.02005A -2.6 -9.3NOTE: Manifold pressures should be ±0.2" WC.Table N. Manifold Gas Pressure Settings