Desa SPC-21PHTSA User Manual download pdf (Page 7)

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114082-01A

CLEANING AND

MAINTENANCE

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

qualiﬁed service person.

CAUTION: You must check

and keep burner/venturi tubes

clean of insect and insect nest. A

clogged tube can lead to a ﬁre.

WARNING: Failure to keep

the primary air opening(s) of

the burner(s) clean may result in

sooting and property damage.

ODS/PILOT AND BURNER

Use a vacuum cleaner, pressurized air, or small,

soft bristled brush to clean.

BURNER PILOT AIR INLET

The primary air inlet holes allow the proper

amount of air to mix with the gas. This provides a

clean burning ﬂame. Keep these holes clear of dust,

dirt, and lint. Clean these air inlet holes prior to

each heating season. Blocked air holes will create

soot. We recommend that you clean the unit every

three months during operation and have heater

inspected yearly by a qualiﬁed service person.

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 com

pressed 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.

Always keep the heater area clear and free from

combustible materials, gasoline and other ﬂam

mable vapors and liquids.

Keep the vent areas (slots in the bottom and the top

at the front of heater) clear at all times.

Visually inspect the pilot ﬂame and burner peri

odically during use. The burner should be bright

orange without a noticeable ﬂame. If the burner

has a noticeable ﬂame, cleaning may be required.

Use the following procedure to inspect burner

assembly.

It is necessary to periodically check the burner

oriﬁce and burner venturi tube to make sure they

are clear of insects, nests or spider webs that may

accumulate over time. A clogged tube can lead

to a ﬁre.

1. Allow heater to thoroughly cool before per

forming any maintenance.

2. Turn control knob to the OFF position and re

move disposable 1 lb. cylinder from heater.

3. Remove four screws securing burner assembly

to base assembly (see Figure 3, page 5).

4. Remove burner assembly from base assembly.

5. Inspect interior of burner assembly for ac

cumulation of dust, lint or spider webs. If

necessary, clean interior with a vacuum

cleaner or apply air pressure. Do not damage

any components within burner assembly when

you are cleaning.

6. Inspect and clean main burner oriﬁce by us

ing a vacuum or apply air pressure at oriﬁce

opening.

7. Inspect and clean pilot (mounted to bracket) by

using a vacuum or apply air pressure through

the air holes in the pilot (see Figure 4).

WARNING: Never use nee-

dles, wires, or similar cylindrical

objects to clean the pilot to avoid

damaging the calibrated ruby

that controls the gas ﬂow.

Figure 4 - Pilot

Thermocouple

Burner

Ignitor

Electrode

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Desa SPC-21PHTSA User Manual Page 7

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