Parts List

Item Description Model Model Model Model

U1TW40S*FRN U1TW50S*FRN U1TW60T*FRN U2TW50T*FRN

27 3/4" NPT Pipe Plug --- --- --- 239-11638-00

28 ASSE Approved Mixing Valve (Optional) 239-43740-01 239-43740-01 239-43740-01 239-43740-01

29 Kit-Heat Trap Insert 265-45419-00 265-45419-00 265-45419-00 265-45419-00

30 Burner Assembly *** 265-48329-01-37 265-48329-02-37 265-48329-02-36 265-48329-03-31

31 Flexible Gas Feedline 233-46930-01 233-46930-01 233-46930-01 233-46930-01

32 Thermal Switch 239-43676-03 239-43676-03 239-43676-03 239-43676-03

33 Screw #6-20 x 3/8 PHCR 239-43967-00 239-43967-00 239-43967-00 239-43967-00

34 Burner** 228-48383-18 228-48383-18 228-48383-18 228-48383-19

35 Pilot Assembly** 233-48175-03 233-48175-03 233-48175-03 233-48175-03

36 Screw #8-18 x 1/2 HWH 239-37261-00 239-37261-00 239-37261-00 239-37261-00

37 Pilot Orifice** 234-45869-01 234-45869-01 234-45869-01 234-45869-01

38 Manifold Mount 239-46201-00 239-46201-00 239-46201-00 239-46201-00

39 FVIR Sensor Plate 239-48341-00 239-48341-00 239-48341-00 239-48341-00

40 Orifice (Normal Atitude) 234-18194-37 234-18194-37 234-18194-36 234-18194-31

Orifice (High Atitude) 234-18194-42 234-18194-42 234-18194-41 234-18194-32

41 Dilution Air Clip 239-48176-00 239-48176-00 239-48176-00 239-48176-00

42 Flue Reducer --- --- --- 243-42572-00

43 Insulation Kit --- --- --- ---

44 Thermowell Insulation --- --- --- ---

45 Gas Valve Natural GasƇƇ 239-49823-01 239-49823-01 239-49823-01 239-49823-02

Gas Valve Natural LPƇƇ

46 Flammable Vapor Sensor Harness 239-49791-00 239-49791-00 239-49791-00 239-49791-00

47 FV Sensor and Thermal Switch Harness 239-50066-00 239-50066-00 239-50066-00 239-50066-00

48 Simulated Resistive Device Harness 239-49817-00 239-49817-00 239-49817-00 239-49817-00

*Applies to all warranties

**Inner door gasket kit recommended

***Ordering a complete burner assembly may increase delivery time. Please order the specific component required for the quickest delivery.

# A420 Anode may need to be cut to length

ŸOrder with item 9

ŸŸOrder with item 12

Ƈ For serial numbers beginning with "J" or sooner

ƇƇ For serial numbers beginning with "K" or later

Page 5