AERCO KC Standard to Low NOx Convertion Instructions - Manual (Page 32)

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7. This completes the Post Purge Timer menu setting.
8. If the unit is a Water Heater, go directly to paragraph 5.1.2 (Breakpoints) before the entered
Factory Password times out (after 1 hour). If the unit is a Boiler, no further menu changes are
required.
NOTE
The Breakpoint Adjustment procedures specified in paragraph 5.1.2 apply
only to KC1000 Water Heaters containing either a C-More or Modular Control
System.
5.1.2 Water Heater Breakpoint Adjustments
The water heater breakpoint settings for a Low NOx KC1000 are different than the breakpoints for a
standard unit. Therefore, the appropriate menu items must be adjusted. For C-More Control
Systems, the breakpoints are adjusted for fire rate increments of 10% using the Tuning Menu. For
Modular Control Systems, the breakpoints are adjusted using the Secondary Menu. Adjust the
breakpoints to the values shown in the following Table for the firing rates shown:
IMPORTANT
Prior to adjusting the breakpoint settings shown in the following Table, ensure
that the Water Heater active setpoint is set to 130°F. Following completion of
the breakpoint adjustments, the active setpoint temperature can be readjusted
if necessary.
Water Heater Breakpoint Settings For Low NOx
Firing Rate C-More Display
Modular
Display
Required
Breakpoint
100% Breakpoint At 100% bp A 64°F
90% Breakpoint At 90% bp 0 63°F
80% Breakpoint At 80% bp 9 66°F
70% Breakpoint At 70% bp 8 74°F
60% Breakpoint At 60% bp 7 83°F
50% Breakpoint At 50% bp 6 93°F
40% Breakpoint At 40% bp 5 103°F
30% Breakpoint At 30% bp 4 112°F
20% Breakpoint At 20% bp 3 115°F
10% Breakpoint At 10% bp 2 128°F
0% Breakpoint At 0% bp 1 135°F