Version 2.2116 NPE Service Manual3.1 General SpecificationsThe following table lists the specifications for the water heater. Additional specifications about water, gas, electric, and air supplies (venting)appear in the Installation section.Item NPE-150S NPE-180(A) NPE-180S NPE-210(A) NPE-210S NPE-240(A) NPE-240SHeatCapacity(Input)Natural Gas 18,000-120,000BTU/H15,000-150,000 BTU/H 19,900-180,000 BTU/H 19,900-199,900 BTU/HPropane Gas 15,000-150,000 BTU/H 19,900-180,000 BTU/H 19,900-199,900 BTU/HEnergyFactorUEF (for NG & LP) 0.96 0.96 0.97 0.96 0.97 0.96 0.97EF (Canada) (for NG & LP) 0.97 0.97 0.99 0.97 0.99 0.97 0.99Flow Rate(DHW)35 °F (19 °C) Temp Rise 6.8 GPM(25.8 L/m) 8.4 GPM (32 L/m) 10.1 GPM (38 L/m) 11.2 GPM (42 L/m)45 °F (25 °C) Temp Rise 5.3 GPM(20 L/m) 6.5 GPM (25 L/m) 7.8 GPM (30 L/m) 8.7 GPM (33 L/m)67 °F (36 °C) Temp Rise 3.2 GPM(12 L/m)4.3 GPM(16 L/m)4.2 GPM(16 L/m)5.0 GPM(19 L/m)5.2 GPM(20 L/m)5.6 GPM(21 L/m)5.7 GPM(22 L/m)Dimensions 17.3 in (W) x 27.4 in (H) x 13.2 in (D)Weight 62 lbs(28 kg)75 lbs(34 kg)67 lbs(30 kg)82 lbs(37 kg)75 lbs(34 kg)82 lbs(37 kg)75 lbs(34 kg)Installation Type Indoor or Outdoor Wall-HungVenting Type Forced Draft Direct VentIgnition Electronic IgnitionWater Pressure 15-150 PSINatural Gas Supply Pressure(from source) 3.5 in WC-10.5 in WCPropane Gas Supply Pressure(from source) 8 in WC-13in WCNatural Gas Manifold Pressure(min-max)-0.04 in WC --0.40 in WC -0.04 in WC - -0.84 in WC -0.05 in WC - -0.36 in WC -0.05 in WC - -0.58 in WCPropane Gas Manifold Pressure(min-max)-0.05 in WC --0.42 in WC -0.05 in WC - -0.50 in WC -0.10 in WC - -0.66 in WC -0.10 in WC - -0.78 in WCMinimum Flow Rate 0 GPM (0 L/m) for “A” models / 0.5 GPM (1.9 L/m) for “S” modelsConnectionSizesCold Water Inlet 3/4 in NPTHot Water Outlet 3/4 in NPTGas Inlet 3/4 in NPTPowerSupplyMain Supply 120 V AC, 60 HzMaximum PowerConsumption 200 W (max 2 A), 350 W (max 4 A) with external pump connectedMaterialsCasing Cold Rolled Carbon SteelHeat Exchangers Primary Heat Exchanger: Stainless SteelSecondary Heat Exchanger: Stainless SteelVentingExhaust 2 in or 3 in PVC, CPVC, Polypropylene2 in or 3 in Special Gas Vent Type BH (Class II, A/B/C)Intake 2 in or 3 in PVC, CPVC, Polypropylene2 in or 3 in Special Gas Vent Type BH (Class II, A/B/C)Vent Clearances 0 in to combustiblesSafetyDevicesFlame Rod, APS, Ignition Operation Detector, Water Temperature High Limit Switch, Exhaust Temperature High Limit Sensor,Power Surge Fuse3. Technical Data