Carrier BW9 User Manual page 7

To inspect the combustion area and vent system, you will need a flashlight. Then referring to Fig. 25, 26, 27 or Fig. 28, 29 and 30 proceed as
follows:
1. Turn the electrical supply to the boiler to OFF, and remove burner access door.
2. Using the sight glass, carefully inspect the burner area including the burner for dirt, soot, or rust. Service and additional maintenance
information can be located in the installation instructions.
! CAUTION: UNIT OPERATION HAZARD. Failure to follow this caution may result in unit or property damage. If dirt,
rust, soot, or scale accumulations are found, call your dealer. DO NOT OPERATE YOUR BOILER.
3. Inspect the exhaust pipe and combustion air pipe for sags, holes, or disconnections. Use Fig. 31 for reference.
25
Model BW9-125 Through 200
28
Model BW9-50 Through 100
—7—
SIGHT GLASS
26
29
27
SIGHT GLASS
30