Desa CLD3018N Inspecting Burners, Thermostat Control Operation, Pilot Flame Pattern, Continued

CGS2718N, CGS3124N, CLD3018N,

CLD3924NT, and CCL3930NT(A)

UNVENTED NATURAL GAS LOG HEATER

OPERATING

HEATER

Continued

5.Turn control knob counterclockwise

C-clockwiseto the PILOT position.

Press in control knob for five (5) sec- onds (see Figure 32).

Note: You may be running this heater for the first time after hook- ing up to gas supply. If so, the con- trol knob may need to be pressed in for 30 seconds or less. This will allow air to bleed from the gas system.

•If control knob does not pop out when released, contact a qualified service person or gas supplier for repairs.

6.With control knob pressed in, press and release ignitor button. This will light pilot. The pilot is attached to the front burner. If needed, keep press- ing ignitor button until pilot lights.

Note: If pilot does not stay lit, con- tact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Light- ing Procedure.

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

Note: If pilot goes out, repeat steps 3 through 7. This heater has a safety interlock system. Wait one (1) minute for system to reset before lighting pi- lot again.

8.Turn control knob counterclockwise

C-clockwiseto desired heating level. The burners should light. Set control knob to any heat level between HI and LO.

CAUTION: Do not try to adjust heating levels by using the manual shutoff valve.

	HI
	OFF
	LO
	Pilot
Ignitor Button	Control Knob

Figure 32 - Control Knob and Ignitor But- ton Location

Ignitor Electrode

Thermocouple Pilot Burner

Figure 33 - Pilot

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Heater

Turn control knob clockwise Clockwise to the OFF position.

Shutting Off Burners Only (pilot stays lit)

Turn control knob clockwise Clockwise to the PILOT position.

THERMOSTAT

CONTROL

OPERATION

(Thermostat-Controlled

Models Only)

The thermostat control knob can be set to any comfort level between Hi and Lo. The thermostat will gradually modulate the heat output and flame height from higher to lower settings, or pilot, in order to maintain the comfort level you select. The ideal comfort setting will vary by household depending upon the amount of space to be heated, the output of the central heating system, etc.

Note: Selecting the Hi setting with the control knob will cause the burner to remain fully on, without modulating down in most cases.

MANUAL LIGHTING

PROCEDURE

1.Follow steps 1 through 5 under Light- ing Instructions, pages 16 and 17.

2.Depress control knob and light pilot with match.

3.Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Now follow step 8 under Lighting Instruc- tions, column 1.

INSPECTING

BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 34 shows a correct pilot flame pattern. Figure 35 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touch- 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 35

•turn heater off (see To Turn Off Gas to Appliance, page 17 [manually-controlled models] or column 2, this page [thermo- stat-controlled models])

•seeTroubleshooting, pages 20 through 22

Thermocouple Pilot Burner

Figure 34 - Correct Pilot Flame Pattern

Thermocouple

Pilot Burner

Figure 35 - Incorrect Pilot Flame Pattern

BURNER PRIMARY AIR HOLES

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

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