AERCO KC1000 Water Heater July 2011 - Manual (Page 45)

MAINTENANCE
6-1
SECTION 6 – MAINTENANCE
6.1 MAINTENANCE SCHEDULE
The KC1000 Heater requires regular routine maintenance to maintain efficiency and reliability. For best
operation and life of the unit, the following routine maintenance procedures should be performed in the
time periods specified in Table 6-1.
Appendix I contains recommended spare parts lists for maintenance of the KC1000 Heater.
WARNING!
TO AVOID PERSONAL INJURY, BEFORE SERVICING:
(A) DISCONNECT AC POWER TO THE UNIT
(B) SHUT OFF THE GAS SUPPLY TO THE UNIT
(C) ALLOW THE UNIT TO COOL TO A SAFE TEMPERATURE
6.2 SPARK IGNITER
The spark igniter (part no.124570) is located in the body of the burner (see Fig. 6.1). The igniter may be
HOT. Care should be exercised. It is easier to remove the igniter from the unit after the unit has cooled to
room temperature.
To inspect/replace the Igniter (124570):
1. Set the ON/OFF switch on the control panel to the OFF position and disconnect AC power from the
unit.
2. To access to the spark igniter, remove the unit’s left side panel and left rear cover.
3. Disconnect the igniter cable from the igniter contact.
4. Using a 15/16” open-end wrench, remove the igniter from the burner shell.
5. Inspect the igniter for erosion or carbon build-up. If there is substantial erosion of the spark gap or
ground electrode, the igniter should be replaced. If carbon build-up is present, clean the igniter using
fine emery cloth. Repeated carbon build-up on the igniter is an indication that a check of the
combustion settings is required. See Section 4 for Combustion Calibration procedures.
6. Prior to reinstalling the igniter, a very light coating of a conductive anti-seize compound must be
applied to the igniter threads.
7. Reinstall the igniter in the burner shell. Do not over tighten the igniter. A slight snugging up is
sufficient.
8. Reattach the igniter cable.
9. Replace the left side panel and left rear cover. Also, replace the condensate cup to drain tubing if it
was removed.