Desa CGN10TA User Manual download pdf (Page 12)

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VENT-FREE NATURAL GAS HEATER

CGN10TA and CGN10TLA

CLEANING AND

MAINTENANCE

CABINET

Air Passageways

• Use a vacuum cleaner or pressurized air

to clean.

Exterior

• Use a soft cloth dampened with a mild

soap and water mixture. Wipe the cabi-

net to remove dust.

WARNING: Turn off heater

and let cool before cleaning.

CAUTION: You must keep

control areas, burner, and circu-

lating air passageways of heater

clean. Inspect these areas of

heater before each use. Have

heater inspected yearly by a quali-

fied service person. Heater may

need more frequent cleaning due

to excessive lint from carpeting,

bedding material, pet hair, etc.

1/2 GLASS HEIGHT

BURNER FLAME PATTERN

Figure 19 shows a correct burner flame

pattern. Figure 20 shows an incorrect burner

flame pattern. The incorrect burner flame

pattern shows yellow tipping of the flame. It

also shows the flame higher than 1/2 the

glass panel height.

WARNING: If yellow tipping

occurs, your heater could pro-

duce increased levels of carbon

monoxide. If burner flame pattern

shows yellow tipping, follow in-

structions at bottom of this page.

NOTICE: Do not mistake orange

flames with yellow tipping. Dust

or other fine particles enter the

heater and burn causing brief

patches of orange flame.

Figure 19 - Correct Burner Flame Pattern

Figure 20 - Incorrect Burner Flame Pattern

Yellow

Tipping

1/2 GLASS HEIGHT

INSPECTING

BURNER

Check pilot flame pattern and burner flame

pattern often.

PILOT FLAME PATTERN

Figure 17 shows a correct pilot flame pat-

tern. Figure 18 shows 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.

If pilot flame pattern is incorrect, as shown

in Figure 18

• turn heater off (see To Turn Off Gas to

Appliance, page 11)

•

see Troubleshooting, pages 13 through 15

Figure 17 - Correct Pilot Flame Pattern

Figure 18 - Incorrect Pilot Flame Pattern

GRH/OV 009GOOD PILOT

Thermocouple

Pilot Burner

Thermocouple

GRH/OV 008BAD PILOT/LP

Pilot Burner

If burner flame pattern is incorrect, as shown

in Figure 20

• turn heater off (see To Turn Off Gas to

Appliance, page 11)

•

see Troubleshooting, pages 13 through 15

ODS/PILOT AND BURNER

ORIFICE

• Use a vacuum cleaner, pressurized air,

or small, soft bristled brush to clean.

CLEANING BURNER

PILOT AIR INLET HOLE

We recommend that you clean the unit every

2,500 hours of operation or every three months.

We also recommend that you keep the burner

tube and pilot assembly clean and free of dust

and dirt. To clean these parts we recommend

using compressed air no greater than 30 PSI.

Your local computer store, hardware store, or

home center may carry compressed air in a

can. You can use a vacuum cleaner in the

blow position. If using compressed air in a

can, please follow the directions on the can.

If you don't follow directions on the can, you

could damage the pilot assembly.

1. Shut off the unit, including the pilot.

Allow the unit to cool for at least thirty

minutes.

2. Inspect burner, pilot for dust and dirt.

3. Blow air through the ports/slots and

holes in the burner.

Clean the pilot assembly also. A yellow tip

on the pilot flame indicates dust and dirt in

the pilot assembly. There is a small pilot air

inlet hole about two inches from where the

pilot flame comes out of the pilot assembly

(see Figure 21). With the unit off, lightly

blow air through the air inlet hole. You may

blow through a drinking straw if compressed

air is not available.

Figure 21 - Pilot Inlet Air Hole

Pilot Assembly

Pilot Air Inlet Hole

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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Desa CGN10TA User Manual Page 12

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