Install Instructions

Revision A (PCP #3000004508 / CN #500004666) initial release.
Revision B (PCP #3000005203 / CN #500005353) reflects the addition of the DHW flow
switch filter cleaning section and the Noble logo.
Revision C (PCP #3000005203 / CN #500005353) reflects updates made to the mixing
valve statements.
Revision D (PCP# 3000006133 / CN# 500007549) reflects the addition of PVC-DWV vent
fitting in Table 3D on page 18.
Revision E (PCP #3000008325 / CN # 500008312) reflects the addition of parameter
values and cleaning instructions for the sanitary bypass filter in the Combi waterset, along
with edits made to pages 18, 39, and 58.
Revision F (PCP #3000010352 / CN# 500010041) reflects the removal of the flow switch
information on pages 49, 50, and 79.
Revision G (PCP# 3000009959 / CN# 500009745) reflects changes made to water
chemistry information on pages 3, 7, 33-34, 36-39, 41-43, 52-53, 69, and 71.
Revision H (PCP #3000010423 / CN #500010150) reflects an update to the neutralizer
information on page 51.
Revision J (PCP #3000010561 / CN #500010149) reflects an update to the vent increase
notice on page 16 and the bird screen information on page 27.
Revision K (PCP #3000010778_ 3000021144 / CN #500010568) reflects updates made
to high altitude on page 6, number 6 along with edits to pages 41 - 43.
Revision L (PCP #3000022821 / CN #500012930) reflects updates made to Table 3F on
page 19.
Revision M (PCP #3000023992 / CN #500013886) reflects an update to material
numbers on pages 12 and 66.
Revision N (PCP #3000024821 / CN #500000000) reflects the addition of the Noble
Boiler.
Revision P (PCP #3000026706 / CN #500016345) reflects an update to the low voltage
field wiring connections images on pages 56 and 57.
Revision R (PCP #3000027055 / CN #500016866) reflects the removal of references to
an external flow switch.
Revision T (PCP #3000027325 / CN #500017083) reflects the removal of Table 2A on
page 12.
Revision U (PCP #3000028215 / CN #500017754) reflects the removal of references to
wire colors.
Revision V (PCP #3000029099 / CN #500018651) reflects an update to the ladder
diagrams.
Revision W (PCP #3000031515 / CN #500021060) reflects the addition of the NKB 199
model along with added series numbers.
Revision X (PCP #3000034309 / CN #500022970) reflects an update to the gas valve
adjustment procedure.
Revision Y (PCP #3000035690 / CN #500024132) reflects the removal of the combi only
high altitude note on page 6.
Revision AA (PCP #3000036920 / CN #500025230) reflects an update to the system
supply sensor text on page 55.
Revision AB (PCP #3000041012 / CN #500028988) reflects flue grommet updates on
pages 67, 76, and 93 along with the Centrotherm updates on pages 19 and 24.
Revision AC (PCP #3000042716 / CN #500030589) reflects freeze protection updates
along with PVC purge as well as venturi cleaning and troubleshooting additions.
MM #100275091_DIR #2000533998_Rev AC
12/20