AERCO BMK 1.5 LN October 2012 - Manual (Page 87)

CHAPTER 7
MAINTENANCE
PR1: 10/18//12 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 87 of 166
GF-120
OMM-0041 0E
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
Disconnect the flex hose from the air/fuel valve by loosening the hose clamp. 13.
Remove the four (4) 5/16-18 hex head screws securing the blower to the burner plate 14.
(Figure 7-5).
Remove the blower and air/fuel valve from the burner plate by lifting straight up. Also, 15.
remove the blower gasket.
Remove the eight (8) 3/8-16 nuts from the burner flange (Figure 7-4) using a 9/16” 16.
wrench.
NOTE
The burner assembly is heavy, weighing approximately 25 pounds.
Remove the burner assembly from burner flange by pulling straight up. 17.
Remove and replace the two (2) burner gaskets. 18.
NOTE
During reassembly, apply high-temperature, anti-seize lubricant to the
threads of the igniter-injector and grounding screw. Also, ensure that the
igniter-injector is properly positioned as indicated in Figure 7-3. Torque the
igniter-injector to 15 ft-lbs.
Beginning with the burner assembly removed in step 17, reinstall all the components in 19.
the reverse order that they were removed.
Ensure that the igniter-injector and flame detector cutouts in the burner plate are 20.
properly aligned with the heat exchanger top flange.