Installation Instructions

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).
KBX-I-O Rev D
1/09