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Revision Notes: Revision B (ECO #C02407) reflects gas valve
adjustment, room air, new sidewall vent termination, piping diagrams,
flow switch,relief valve, T & P gauge, Maintenance Section, FIG. 8-1
(Line Voltage), and high altitude changes.
Revision C (ECO #C02545) reflects the addition of references to the
safety shutoff testing and instructions, sediment trap, periodic cleaning
of screens in vent terminations, removal of B149.2 references, changed
the arrow direction on FIG. 6-8, wall thickness for direct vent
terminations and sidewall vent termination kit number correction.
Revision D (ECO #C02738) reflects updates made to the line voltage
image (FIG. 8-1 on page 43), and edits made to the gas conversion
section for the new orifice on the 399 model (page 12).
Revision E (ECO #C03223) reflects edits made to the high altitude
section on page 7 and updates made to the condensate trap image on
pages 49 and 66.
KBX-I-O Rev E
3/09