1611UDSBD-3GBEN, Pag. 24/36
13. Maintenance
& Service
Maintenance
Schedule
NOTE: If replacement
parts are required, use
only factory-authorized
parts.
Figure 11a - Location of
controls
The material contained in the MAINTENANCE AND SERVICE Section of this
manual is designed to aid a qualifi ed service technician in maintaining and servic-
ing this equipment. This heater will operate with a minimum of maintenance. To
ensure long life and satisfactory performance, a heater that is operated under nor-
mal conditions should be inspected and cleaned at the start of each heating season
(inspection and maintenance at least once a year). If the heater is operating in an
area where an unusual amount of dust or other impurities are present in the air,
more frequent maintenance is recommended.
When any service is completed, be careful to reassemble correctly to ensure that no
unsafe conditions are created. When starting the heater, always follow the lighting
instructions on the heater.
Warning :
If you turn off the
power supply, always
turn off the gas.
Maintenance Schedule - The following procedures should be carried out at least
once each year (See fi gure 11a) :
• Clean all dirt, lint, and grease from the blower wheel, guard and motor.
• Check the heat exchanger both internally and externally for evidence of physical
damage.
• Check the burner for scale, dust, or lint accumulation. Clean if required.
• Check the vent or vent/combustion air system for soundness. Replace any parts
that do not appear sound.
• Check the wiring for any damage. Replace damaged wiring.
1) Burner
2) LC3 limit control
3) Burner operating light (H6)
4) Reset switch (S3)
5) Spark ignitor (ER)
6) Control panel assy
(fi g. 11b)
7) Gas valve (V1)
8) Fan motor (M1)
9) Venter motor.
Venter motor is in the same
location for all models, but
appearance may differ (M3)
10) Fan control (FC)
11) Limit control LC1
12) Flame sensor (IS)
13) Reset LC3
(limit control)
Sensor bulb is located in the air
outlet of the heater.
14) Fuse (F3.1)
1
2
3
4
5
13
14
6
7
8
12
11
10
8
