Service Manual

Revision Notes: Revision A (ECO #C06854) initial release.
Revision B (ECO #C08645) reflects additional cleaning and inspection
instructions for the condensate trap (page 29).
Revision C (ECO #C09197) reflects updates made to the SMART
SYSTEM control (ECR #R04523).
Revision D (ECO #C09843) reflects the addition of the new condensate
trap pipe (R04984).
Revision E (ECO #C10143) reflects the removal of the “GV/RELAY
FAIL” FAULT (ECR #R05239) and updates made to the ignition timing
information.
Revision F (ECO #C10450) reflects changes made to Table 3-6 on
page 45.
Revision G (ECO #C11102) reflects outdoor air reset updates.
Revision H (ECO #C12763) revised the maximum CO2 and the
minimum O2 (R06021) on page 45.
Revision I (ECO #C13178) reflects edits made to the condensate trap.
Revision J (ECO #C14411) reflects the addition of the low water flow
test procedure on page 32.
Revision K (ECO C17091) reflects the addition of the system supply
sensor note on page 26 and changes made to the Boiler Size section
on page 25 (ECO #C16186).
WH-SER Rev K
02/15