Kuma Stoves SHASTA user manual Lighting, Carburetor Adjustments

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LIGHTING:

Initial lighting should be undertaken by a qualified technician, with a suitable probe-type manometer for checking the flue pressure. Although adjusting the draft stabilizer by “feel”

is possible, the most efficient method of tuning the stove is at the start and with the proper equipment. The customer who will be operating the stove is an important partner in this process, so a full understanding of how the stove operates in invaluable.

Shortly after the stove is lit an air pressure reading should be taken. To take this reading, drill a hole suitable for the manometer probe size in the stove pipe directly above the stove outlet. After pressure readings are finished, simply plug the stove pipe hole with a suitable sized screw.

Lighting the stove:

1.Remove top ring from burner top.

2.Remove the catalyst (stainless steel mesh cylinder) from the burn pot.

3.Turn all supply valves on.

4.Turn control knob on carburetor to setting 1.

5.Press on/off control lever on carburetor to start (it pulls up and clicks to shut stove off and pushes or clicks down to on position).

6.When a small amount of oil is visible in the burner bottom, take a

wooden kitchen match and light the oil (a small piece of crumpled tissue paper can be lit and tossed into the burner if desired, or use an alcohol-gel fire starter).

7.When oil is lit, replace the catalyst and the top ring and shut the door (slightly cracked door is helpful for a short period of time to aid initial light-up of oil, but should not be required for more than 30 or so seconds). Please note: during initial start-up, before the catalyst begins vaporizing the fuel, a very active yellow flame will appear. This is a normal burning off of excess fuel flooding the burner before vaporization begins.

8.Within a few minutes, the stove burner should begin burning blue at flame base and yellow at flame tip. At this point a pressure check should be made, and the draft stabilizer adjusted to within the recommended pressure setting range.

9.Run the stove for at least 30 minutes on low or medium to allow the whole stove and chimney to come up to operation temperature. At this point adjustments to the carburetor for correct high and low-fire should be done.

See the following section for adjustment procedure.

10.Turn the control knob to setting 1 and run for about 10-15 minutes and check the pressure once again.

CARBURETOR ADJUSTMENTS:

Your Shasta has a carburetor that has both low-fire (setting 1) and high-fire (setting 6) adjustment screws on the top. They are small slotted screws that are of red color and may need to be adjusted for correct flame size.

Both low- and high-fire settings have been pre-set at the factory, but depending on your choice of fuel (#1 or #2 grade), these will usually need to be adjusted for the viscosity of fuel you are using. Please note that after initial warm-up it is important to adjust the high-fire first, then the low-fire, as any adjustment made to the high-fire can affect the low-fire, but not vice versa. Below is a description of what the flame should look like at both low– and high-fire:

Low-fire:

The flame should be totally blue with blue flame “spears” or jets dancing between the inner wall of the burn pot and the catalyst. The catalyst will be dull red to bright red. There will be blue flame appearing around the fire ring at the catalyst top. You can decrease the setting to where there is only the blue spears in the burn pot and little activity of blue flame at the burner top. However, if there is very much yellow flame in the burn pot on low setting, then the low-fire adjustment screw needs to be increased to a total blue flame condition.