NOTE
If needed, use a piece of wire or drill bit to clean the ports:
• Gas port: Drill size 1/8-inch (0.125 inch)
• Air port: Drill size 42 (0.093 inch)
9.
Inspect the spark rod.
• The tip should be clean and free of dirt and carbon. If not clean, replace the spark rod.
• The porcelain must be intact. If the porcelain is cracked, replace the spark rod with Spark Plug, GFS
part number 117-208.
NOTE
This part includes the spark rod, flame sensor, and pilot line entry to the burner.
10. Pull the flame rod.
• The metal rod should be clean and free of dirt and carbon. If needed, either replace the flame rod, or
clean the rod with steel wool and wipe with a clean paper towel. Avoid touching the flame rod while
cleaning.
• The porcelain must be intact. If the porcelain is cracked, replace the flame rod.
If applicable: Inspect and clean an air heater with a Low NOx burner
Scope: Perform this procedure if the air heater has a Low NOx burner. If the air heater has a standard
burner, complete “If applicable: Inspect and clean an air heater with a standard burner” (page 29) instead.
Once each year, complete these tasks in addition to the monthly air heater maintenance tasks.
WARNING
Before servicing, lockout/tagout the air heater, including the main electrical service and the main gas
supply.
CAUTION
Use care when touching the exterior of an operating motor or a motor that has just been shut down. Motors
usually run hot and may be hot enough to be painful or cause injury.
1.
If applicable: Inspect the air heater fan belt for wear; replace any torn or worn belts.
NOTE
For instructions, see “Replace fan belts” (page 39).
2.
Inspect the bolts and screws for tightness. Tighten them as necessary.
3.
Inspect the motor for cleanliness. Remove dirt and grease from the wheel and housing to prevent
imbalance and damage.
a.
Clean exterior surfaces only.
b.
Use a rag to remove dust and grease from the motor housing to ensure proper motor cooling.
c.
Remove dirt and grease from the wheel and housing to prevent imbalance and damage.
4.
Remove the flame sensor wire, spark cable, and wiring harness attached to the blower.
Service and maintenance
Global Finishing Solutions
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239-062 rev 5
