Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
SECTION 4 – MAINTENANCE
Page
44
of
144
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0128_0B
07/17/2017
Ph.: 800-526-0288
4.5 SAFETY DEVICE TESTING
Systematic and thorough tests of the operating and safety devices should be performed to
ensure that they are operating as designed. Certain code requirements, such as ASME CSD-1,
require that these tests be performed on a scheduled basis. Test schedules must conform to
local jurisdictions. The results of the tests should be recorded in a log book.
See The
Benchmark 750 – 3000 Boiler Installation and Startup Guide Guide
, OMM-0127 (GF-
205-K) for a description and instructions for performing these tests.
4.6 BURNER INSPECTION
The burner assembly is located at the top of the unit's heat exchanger. The burner assembly
may be hot. Therefore, allow the unit to cool sufficiently before removing the burner assembly.
4.6.1 BMK 750/1000 BURNER INSPECTION
The following parts are required for reassembly after burner inspection:
BMK 750/1000 Burner Inspection Parts
Part No.
Description
81143
Burner Gasket
81048
Flame Detector Gasket
81064
Blower Gasket
BMK 750/1000 Burner Inspection Instructions
1. Set the ON/OFF switch on the C-More Controller, to the
OFF
position. Disconnect AC
power from the unit and turn off the gas supply.
2.
Remove the top shroud from the unit by grasping the top handle and lifting straight up. This
will disengage the shroud from the four (4) pins in the side panels.
3. Disconnect the lead wire from the flame detector installed on the burner plate. See Figure
4-4b.
4. Remove the two (2) screws securing the flame detector to the plate. The flame detector is
secured to the burner plate with one (1) #10-32 screw and one (1) #8-32 screw.
5. Remove the flame detector and gasket from the burner plate.
6.
Disconnect the cable from the igniter-injector.
7. Using a 7/16” open-end wrench, disconnect the compression nut securing the gas injector
tube of the igniter-injector to the elbow of the staged ignition assembly (see Figure 4-1a,
below). Disconnect the staged ignition assembly from the igniter-injector.
