Empire Comfort Systems VFP36SP32EN-2 - Manual (Page 22)

26670-0-0110 Page 22
Figure 16 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. Figure 17 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.
Correct pilot flame pattern
Figure 16
Incorrect pilot flame pattern
Figure 17
If pilot flame pattern is incorrect, as shown in Figure 17
• See Troubleshooting, page 24.
Cleaning and pilot Maintenance
oxygen Depletion Sensor Pilot (Figure 18)
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 18
Warning:
Never use needles, wires, or similar cylindrical objects to
clean the pilot to avoid damaging the calibrated ruby that
controls the gas flow.
pILOT fLAME ChARACTERISTICS
THERMOPILE PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
THERMOPILE PILOT
THERMOCOUPLE
(LPG)
THERMOCOUPLE
(NATURAL)
A B