Owner`s manual

Page 18 12359-4-0703

Figures 21 and 24 show a correct pilot ﬂame pattern. The correct

ﬂame will be blue and will extend beyond the thermocouple. The

ﬂame will surround the thermocouple just below the tip. A slight

yellow ﬂame may occur where the pilot ﬂame and main burner

ﬂame meet. Figures 22 and 25 show an incorrect pilot ﬂame pattern.

The incorrect pilot ﬂame is not touching the thermocouple. This

will cause the thermocouple to cool. When the thermocouple

cools, the heater will shut down.

VFSR PILOT

Correct appearance of pilot ﬂame.

Figure 21

Incorrect appearance of pilot ﬂame.

Figure 22

If pilot ﬂame pattern is incorrect, as shown in Figure 22

• See Troubleshooting, page 21.

Cleaning and Maintenance/Pilot

Oxygen Depletion Sensor Pilot (Figure 23 )

When the pilot has a large yellow tip ﬂame, clean the Oxygen

Depletion Sensor as follows:

1. Clean the ODS pilot by loosening nut B from the pilot tubing.

When this procedure is required, grasp nut A with an open end

wrench.

2. Blow air pressure through the holes indicated by the arrows.

This will blow out foreign materials such as dust, lint and

spider webs. Tighten nut B also by grasping nut A.

Figure 23

VFSV PILOT

Correct Pilot Flame Pattern

Figure 24

Incorrect Pilot Flame Pattern

Figure 25

If pilot ﬂame pattern is incorrect, as shown in Figure 25

• See Troubleshooting, page 21.

PILOT FLAME CHARACTERISTICS