AERCO BMK 3.0 LN Nat. Gas June 2010 - Manual (Page 53)

MAINTENANCE
CHAPTER 7 MAINTENANCE
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.
In order to perform the maintenance tasks
specified in Table 7-1, the following
maintenance kits are available through your
local AERCO Sales Representative:
• Annual Maintenance Kit, Part No. 58025-01
• 24-Month
Waterside/Fireside Inspection Kit,
Part No. 58025-04 (See NOTE below)
NOTE
The 24-Month Waterside/Fireside Inspec-
tion Kit also includes the items contained
in the Annual Maintenance Kit. Therefore,
only Kit Part No. 58025-04 is required
when performing the waterside/fireside
inspections.
Appendix K contains recommended spare parts
lists for maintenance of the boiler.
WARNING
TO AVOID PERSONAL INJURY,
PRIOR TO SERVICING:
• DISCONNECT THE AC SUPPLY BY
TURNING OFF THE SERVICE
SWITCH AND AC SUPPLY CIRCUIT
BREAKER.
• 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 IGNITOR-INJECTOR
The ignitor-injector (part no. 58023) is located in
the body of the burner (see Figure 7-1). In
addition to providing the ignition spark required
to light the burner, this component also contains
a gas injector tube which connects to the staged
ignition assembly. The ignitor-injector may be
hot, therefore, care should be exercised to avoid
burns. It is easier to remove the ignitor-injector
from the unit after the unit has cooled to room
temperature.
BURNER
HOUSING
FLAME DETECTOR
& GASKET (SECURED
WITH 2 SCREWS) IGNITOR-
INJECTOR
STAGED
IGNITION
ASSY
Figure 7-1.
Burner Assembly – Top View
To inspect/replace the Ignitor-injector, proceed
as follows:
1. Set the ON/OFF switch on the control panel,
to the OFF position. Disconnect AC power
from the unit
2. Remove the top and side panels from the
unit.
3. Disconnect the cable from the ignitor-injector.
4. Using a 7/16” open-end wrench, disconnect
the compression nut securing the gas injector
tube of the ignitor-injector to the elbow of the
staged ignition assembly. Disconnect the
staged ignition assembly from the ignitor-
injector.
7-1