Coleman 5151C Dokumentacja Pobierz pdf (Strona 24)

However, the amount of combustion air required will vary de-

pending on altitude, actual BTU. content of the gas being

used, gas pressure, conversion to another gas, and other

variable factors.

Therefore, it is essential that the burner flame be observed

and any necessary adjustments are made before the fur-

nace is put into service at the final home site. Adjusting the

burner air is considered part of the normal home set--up pro-

cedure and is the responsibility of either the home seller or

buyer, depending on their agreement. Adjustments of this

type are not covered by the warranty.

Combustion air adjustments must be made only

by a qualified technician. Improper air adjustment

may cause unsafe operation, explosion or as -

phyxiation.

To adjust the combustion air:

1. To light and operate furnace see label inside lower fur-

nace door.

2. Allow the burner to burn for about 1 MINUTE.

3. Look through the observation window and observe the

appearance of the flame.

4. On natural gas, the base of the flame should be blue but

the tips of the flame will be yellow. (See Figure 20.)

5. On Propane gas, almost all of the flame will be yellow

although some blue should still be present at the base

of the flame next to the end of the burner. (See Figure

21.)

6. If the flame is too yellow, the combustion air should be

increased. If the flame is excessively blue (no yellow)

the combustion air should be decreased.

7. To adjust the combustion air, loosen the lock screw hold-

ing the combustion air rod in place. Push in on the rod

to increase the combustion air. Pull out on the combus-

tion air rod to decrease the combustion air. Tighten lock

screw after adjustment is made. Do not completely

close air damper at any time. Complete closure of air

damper to burner will result in improper operation. See

caution above.

View of Burner Through the Observation Window

Correct Amount of

Primary Air

Too Little Primary Air

Push Shutter Rod In

Too Much Primary Air

Pull Shutter Rod Out

Correct Amount of

Primary Air

Too Little Primary Air

Push Shutter Rod In

Too Much Primary Air

Pull Shutter Rod Out

Figure 20 -- Natural Gas Flame Appearance

Figure 21 -- Propane Gas Flame Appearance

1 2 ... 19 20 21 22 23 24 25 26 27 28

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Coleman 5151C Dokumentacja Strona 24

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