AERCO BMK 3.0 LN Nat. Gas APRIL 2009 - Manual (Page 51)

MAINTENANCE
7-1
CHAPTER 7 MAINTENANCE
5. The igniter is gapped at 1/8-inch. If there is a
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 Chapter 4 for
combustion calibration.
7.1 MAINTENANCE SCHEDULE
The unit requires regular routine maintenance to
keep up efficiency and reliability. For best
operation and life of the unit, the following
routine maintenance procedures should be
carried out in the time periods specified in Table
7-1. See Appendix I for a complete CSD-1
inspection check list.
WARNING
TO AVOID PERSONAL, PRIOR TO
SERVICING:
6. Prior to reinstalling the igniter, a high
temperature anti-seize compound must be
applied to the igniter threads.
7. Reinstall the igniter. Do not over tighten the
igniter. A slight snugging up is sufficient.
Reconnect the igniter cable.
• DISCONNECT THE AC SUPPLY BY
TURNING OFF THE SERVICE
SWITCH AND AC SUPPLY CIRCUIT
BREAKER. 8. Reinstall the side and top panels on the unit.
Figure 7-1
Spark Igniter and Flame Detector
Location – Top View
• SHUT OFF THE GAS SUPPLY AT
THE MANUAL SHUT-OFF VALVE
PROVIDED WITH THE UNIT
• ALLOW THE UNIT TO COOL TO A
SAFE WATER TEMPERATURE TO
PREVENT BURNING OR SCALDING
7.2 SPARK IGNITER
The spark igniter, part no. GP-122435-S, is
located in the body of the burner (see Figure 7-
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:
1. Set the ON/OFF switch on the control panel,
to the OFF position. Disconnect AC power
from the unit
2. Remove the side and top panels from the
unit.
3. Disconnect the igniter cable from the igniter.
4. Using a 15/16” wrench, unscrew the igniter
from the burner head. Remove the igniter
from the burner shell, by grasping the
contact end of the igniter.