The following list has downloadable PDFS for reference in replacing a Noritz Tankless heat exchanger. See the list below for the models in question.
This information is meant for professional servicer use only. Any attempt to do this replacement yourself may result in voided warranty and you assume all risk.
NRC111 and NCC199
Models: NRC111-DV-LP, NRC111-DV-NG, NRC111-SV-LP, NRC111-SV-NG, NCC199-DV-LP, NCC199-DV-NG, NCC199-SV-LP, NCC199-SV-NG
NRC98 GQ-C2857WS
Models: GQ-C2857WS US LP (NRC98OD), GQ-C2857WS US NG (NRC98OD), GQ-C2857WS-FF US LP (NRC98DV), GQ-C2857WS-FF US NG (NRC98DV), NRC83-DV-LP, NRC83-DV-NG, NRC83-OD-LP, NRC83-OD-NG, NRC98-DV-LP, NRC98-DV-NG, NRC98-OD-LP, NRC98-OD-NG
NRC1111 NCC1991 NCC1992 GQ-C3257WX GQ-C3257WX US
Models: GQ-C3257WX US LP (NRC111OD), GQ-C3257WX US NG (NRC111OD), GQ-C3257WX-FF US LP (NRC111DV), GQ-C3257WX-FF US NG (NRC111DV), GQ-C3257WZ US LP (NCC199OD), GQ-C3257WZ US NG (NCC199OD), GQ-C3257WZ-FF US LP (NCC199DV), GQ-C3257WZ-FF US NG (NCC199DV), NCC1991-DV-LP
N-084M and N-069M-DV
Models: N-069M-DV-CAN-LP, N-069M-DV-CAN-NG, N-069M-DV-LP, N-069M-DV-NG, N-084M-CAN-LP, N-084M-CAN-NG, N-084M-DV-CAN-LP, N-084M-DV-CAN-NG, N-084M-DV-LP, N-084M-DV-NG, N-084M-LP, N-084M-NG, N-084M-ASME-LP, N-084M-ASME-NG, N-084M-DV-ASME-LP, N-084M-DV-ASME-NG
N-069M and N-063S
Models: N-063S-1-LP, N-063S-1-NG, N-063S-CAN-LP, N-063S-CAN-NG, N-063S-LP, N-063S-NG, N-063S-OD-LP, N-063S-OD-NG, N-069M-1-LP, N-069M-1-NG, N-069M-CAN-LP, N-069M-CAN-NG, N-069M-LP, N-069M-NG, N-069M-OD-LP, N-069M-OD-NG
NR111 and NC250
Models: NR111-DV-LP, NR111-DV-NG, NR111-OD-LP, NR111-OD-NG, NR111-SV-LP, NR111-SV-NG, NC250-DV-ASME-LP, NC250-DV-ASME-NG, NC250-SV-ASME-LP, NC250-SV-ASME-NG
NR50 NR66 and NR71
Models: NR50-OD-LP, NR50-OD-NG, NR66-OD-LP, NR66-OD-NG, NR66-SV-LP, NR66-SV-NG, NR71-OD-LP, NR71-OD-NG, NR71-SV-LP, NR71-SV-NG
N-132M – N-1321M – NC380
Models: N-132M-CAN-LP, N-132M-CAN-NG, N-132M-LP, N-132M-NG, N-132M-ASME-LP, N-132M-ASME-NG, NC380-SV-ASME-LP, NC380-SV-ASME-NG
GQ 59 EZ98 EZ111 NCC199CDV NRCB180 NRCB199
Models: GHQ-C2801WX-FF US LP (NRCB180DV), GHQ-C2801WX-FF US NG (NRCB180DV), GHQ-C3201WX-FF US LP (NRCB199DV), GHQ-C3201WX-FF US NG (NRCB199DV), GQ-C2859WX-FF US LP (EZ98DV), GQ-C2859WX-FF US NG (EZ98DV), GQ-C3259WX-FF US LP (EZ111DV), GQ-C3259WX-FF US NG (EZ111DV)
NR981 NC1991 GQ-2857WX GQ-2857WZ
Models: GQ-2857WX US LP (NR98OD), GQ-2857WX US NG (NR98OD), GQ-2857WX-F US LP (NR98SV), GQ-2857WX-F US NG (NR98SV), GQ-2857WX-FFA US LP (NR98DVC), GQ-2857WX-FFA US NG (NR98DVC), GQ-2857WZ US LP (NC199OD), GQ-2857WZ US NG (NC199OD), GQ-2857WZ-FFA US LP (NC199DVC)
NR83 series
Models: GQ-2457WS US LP (NR83OD), GQ-2457WS US NG (NR83OD), GQ-2457WS-FFA US LP (NR83DVC), GQ-2457WS-FFA US NG (NR83DVC), NR83-DVC-LP, NR83-DVC-NG
NR501, NR662
Models: NR501-OD-LP, NR501-OD-NG, NR662-OD-LP, NR662-OD-NG
NRC711 , NRC661A
Models: NRC661A-DV-LP, NRC661A-DV-NG, NRC661A-OD-LP, NRC661A-OD-NG, NRC711-DV-LP, NRC711-DV-NG, NRC711-OD-LP, NRC711-OD-NG
NRC663 (EZTR40)
Models: NRC663-FSV-LP(EZTR40), NRC663-FSV-NG(EZTR40)
NRC661
Models: NRC661-DV-LP, NRC661-DV-NG, NRC661-OD-LP, NRC661-OD-NG
NCC300DV, NCC300OD
Models: GQ-C5032WZ US LP (NCC300OD), GQ-C5032WZ US NG (NCC300OD), GQ-C5032WZ-FF US LP (NCC300DV), GQ-C5032WZ-FF US NG (NCC300DV)
GQ60 EZ98, EZ111, NRCR, NCC199CDV
Models: GQ-C3260WX-FF US LP (EZ111DV), GQ-C3260WX-FF US LP (EZ111DV) [UEF 0.97], GQ-C3260WX-FF US NG (EZ111DV), GQ-C3260WX-FF US NG (EZ111DV) [UEF 0.97], GQ-C3260WXQ-FF US LP (NRCR111DV), GQ-C3260WXQ-FF US NG (NRCR111DV), GQ-C3260WZ-FF US LP (NCC199CDV)
NR98 NC199
Models: N-0751M-DV-LP, N-0751M-DV-NG, NR98-DVC-CA-LP, NR98-DVC-CA-NG, NR98-DVC-LP, NR98-DVC-NG, NR98-OD-LP, NR98-OD-NG, NR98-SV-LP, NR98-SV-NG, NC199-DVC-CA-LP, NC199-DVC-CA-NG, NC199-DVC-LP, NC199-DVC-NG, NC199-OD-LP, NC199-OD-NG