PH-SERIES5121.3 PARTS LIST:(See page 49 & 50 for visual details)REPLACEMENT BURNER HEADS:ITEM PIN INPUT FUEL WEIGHT1 5120000 PH-40 NG 32 lbs (36 kg)1 5120001 PH-40 Propane 32 lbs (36 kg)1 5120002 PH-50 NG 32 lbs (36 kg)1 5120003 PH-50 Propane 32 lbs (36 kg)1 5120004 PH-75 NG 32 lbs (36 kg)1 5120005 PH-75 Propane 32 lbs (36 kg)BURNER HEAD COMPONENTS:ITEM PIN DESCRIPTION WEIGHT2 3010001 Blower Motor Assembly **3 1090C1 Indicator Light **4 3070401 Air Switch PH - 40 **4 3070402 Air Switch PH - 50 **4 3704003 Air Switch PH - 75 **5 3030021 Direct Spark Ignition Module ( Fenwal) **6 3030633 Electrode Assembly **7 3020005 Gas Valve Propane **7 3020003 Gas Valve NG **8 3030026 High Voltage Ignition Wire **9 3070025 Terminal Block **10 3070016 Transformer **11 3110022 View Port - Mica Window **12 5040374 Vinyl Hose for Differential Air Proving Switch **13 3070321 Wire Harness **14 LX1000 Variable Input Control **15 590156 Burner Assembly **TUBE COMPONENTS:ITEM PIN DESCRIPTION WEIGHT16 5170147 Baffle Turbulator 5 lbs (2.3 kg)17 3170325 Flanged Tube Aluminized PH - 40 30 lbs (13.7 kg)17 3170327 Flanged Tube Aluminized PH - 50 & 75 30 lbs (13.7 kg)18 37760 Radiant PH - 75 15 lbs (6.8 kg)19 37759 Radiant PH - 50 30 lbs (13.7 kg)20 3170201 Tube Clamp **21 715013 PH-40 High Output Tube Assembly 45 lbs (21 kg)22 715014 PH-75 High Output Tube Assembly 65 lbs (30 kg)23 3200744 4 x 3 Reducer 5 lbs (2.3 kg)** UNDER 5 LBS