Desa (F)SVYD18NR Inspecting Burners, Pilot Flame Pattern, Burner Primary AIR Holes, Main Burner

OPERATING

HEATER

Continued

MANUAL LIGHTING

PROCEDURE

1.Follow steps 1 through 5 under Light- ing Instructions, page 16.

2.Pilot is located inside stove cavity at- tached to burner. Lift off top grate to allow access to pilot.

3.Depress control knob and light pilot with match.

4.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.

5.Place top grate back into position. Now follow step 8 under Lighting Instructions., page 16.

INSPECTING

BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

(Remote-Ready Models)

Figure 30 shows a correct pilot flame pat- tern. Figure 31 shows an incorrect pilot flame pattern. The incorrect pilot flame is not heat- ing the thermocouple. This will cause the thermocouple to cool. When the thermo- couple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 31

•turn heater off (see To Turn Off Gas to Appliance, page 15)

•see Troubleshooting, pages 19 through 21

Figure 30 - Correct Pilot Flame Pattern

Figure 31 - Incorrect Pilot Flame Pattern

PILOT FLAME PATTERN

(Variable-Manual Control Models)

Figure 32 shows a correct pilot flame pattern. Figure 33 shows an incorrect pilot flame pattern. The incorrect pilot flame is not heat- ing the thermocouple. This will cause the thermocouple to cool. When the thermo- couple cools, the heater will shut down.

If pilot flame pattern is incorrect, as shown in Figure 33

•turn heater off (see To Turn Off Gas to Appliance, page 16)

•see Troubleshooting, pages 19 through 21

Figure 32 - Correct Pilot Flame Pattern

Figure 33 - Incorrect Pilot Flame Pattern

BURNER PRIMARY AIR HOLES

Air is drawn into the burner through the holes in the fitting at the burner entrance. These holes may become blocked with dust or lint. Periodically inspect these holes for any blockage and clean if needed. Blocked air holes will create soot.

MAIN BURNER

Periodically inspect all burner flame holes with the heater running. All slotted burner flame holes should be open with yellow flame present. All round burner flame holes should be open with a small blue flame present. Some burner flame holes may be- come blocked by debris or rust, with no flame present. If so, turn off heater and let cool. Remove blockage. Blocked burner flame holes will create soot.