6

High-fire:

The flame should be bright yellow with a 2/3 fire-box height to where the flame will begin to break up and terminate just a few inches under the firebrick baffle. The base of the flame at the burner ring should still be blue, and the catalyst will be a dull red. If the flame is too high and allowed to impinge on the firebrick baffle too much, the result will be a cooling of the flame tip, and incomplete combustion, thereby producing smoke and soot. Adjust the high-fire adjustment screw to achieve proper flame size.

*EACH ADJUSTMENT OF NO MORE THAN ONE-QUARTER TURN SHOULD BE ALLOWED TO STABILIZE FOR FIVE MINUTES BEFORE MAKING ANY FURTHER ADJUSTMENTS ON EITHER HIGH– OR LOW-FIRE.

*MAKE SURE THE FLUE PRESSURE IS CORRECT BEFORE MAKING ANY CARBURETOR ADJUSTMENTS.

The carburetor on your Oil Classic has a main float valve internally to regulate the oil level in the stove. It also has a separate, second safety float that can trip off if the oil level becomes too high in the carburetor. Should this occur, you can reset the safety lever by clicking it back down to start. You may need to reset the lever several times before the level of oil in the carburetor returns to a normal level. Your Oil Classic has been rigorously tested to both U.L. 896 and U.L. 307A for both residential and mobile homes, and should the fire snuff out for any reason, the carburetor will not allow more than 3/4” of oil in the bottom of the burner.

IT IS IMPERATIVE THAT THE STOVE IS BURNING PROPERLY AS EXPLAINED ABOVE. A POOR DRAFT OR POORLY ADJUSTED STOVE COULD CAUSE THE STOVE TO SOOT AND BUILD UP GASES INSIDE THAT COULD CAUSE THE STOVE TO GO OUT AND THEN RE-IGNITE ON ITS OWN. THESE FUEL RICH GASES CAN BE EXPLOSIVE.

Should the fire go out for any reason, NEVER ATTEMPT TO LIGHT A HOT STOVE! Try to determine why the stove went out and then allow the stove time to cool for 30 minutes before re-starting following the lighting instructions in this manual. If you have any questions about the operation of your Oil Classic please check the trouble-shooting section of this manual or call your dealer.

DRAFT STABILIZER ADJUSTMENTS:

After removing the rear draft stabilizer access cover (the 7”x 7” square cover in the middle of the stove back), you will see that the draft stabilizer has a weighted adjustment screw that you will be able to adjust to weigh more or less on the stabilizer shutter to allow more or less air into the flue. With a suitable manometer, probe into the flue, adjust the weighted screw to where the pressure reading falls within the satisfactory operating range shown on the chart on the following page. If the flame or draft is too high (not enough air entering the draft stabilizer) the fire can flicker excessively and make a roaring noise. It can also appear that the flame is lifting off the burner top, or the flame pulls away or separates from the burner. If too much air is entering the draft stabilizer, the flame will be weak and smoky, producing soot on the glass. The flame will be taller and more yellow/orange in color. This indicates a low negative pressure and inefficient draft. If a manometer is not available, set the stabilizer while on high burn to the point where the stabilizer shutter is just closed with little movement needed to push it open or closed. When your Oil Classic is burning on low burn, the draft stabilizer should be closed, but should wind or any other condition attempt to increase the draft, the draft stabilizer should be able to flutter open, thereby adding air to the flue, slowing the draft to a normal draft pressure. Setting pressure with a manometer is highly recommended. Should the flue be subjected to prolonged high winds or the flue itself is of high efficiency, the draft stabilizer may not be able to supply enough air for an efficient burn. If this condition exists, a second draft regulator in the pipe may be fitted to overcome the excessive draft.

Please see chart on following page.

Page 6 Page 8
Page 7
Image 7
Kuma Stoves OC-8, OC-7, OC-10 user manual High-fire, Draft Stabilizer Adjustments
Page 6 Page 8

OC-10, OC-8, OC-7 specifications

Kuma Stoves has earned a reputation for producing high-quality, efficient wood stoves that combine functionality with aesthetic appeal. Their OC series, which includes the OC-7, OC-8, and OC-10 models, showcases a commitment to excellent design, advanced technology, and user-friendly features. Each stove in this series offers robust performance tailored to meet diverse heating needs while emphasizing durability and efficiency.

The OC-7 is the smallest model in the series, making it ideal for compact spaces like cabins or cozy living rooms. Featuring a large glass door, the OC-7 allows for an unobstructed view of the fire, enhancing ambiance while providing a substantial output of 27,000 BTUs. Its advanced air wash system ensures a clean glass surface, reducing maintenance and ensuring a beautiful fire view. With an estimated heating capacity of up to 1,500 square feet, the OC-7 excels in efficiency, boasting an EPA certification that guarantees low emissions for a cleaner burn.

Moving up in size, the OC-8 offers increased heating capacity and efficiency. This model produces an impressive 32,000 BTUs and can effectively heat areas up to 2,000 square feet. The OC-8 features a secondary combustion system that maximizes heat output while minimizing smoke and particulate emissions. This sophisticated technology not only enhances fuel efficiency but also contributes to a more environmentally sustainable heating solution. Additionally, the OC-8 includes a larger firebox, accommodating longer logs for extended burn times.

At the top of the OC series, the OC-10 model brings superior power and performance. With a staggering output of 45,000 BTUs, it can heat up to 2,500 square feet, making it suitable for larger homes or open spaces. The OC-10 incorporates a state-of-the-art catalytic combustor, which helps achieve even lower emissions and higher efficiency during burning. This technology allows users to enjoy longer burn times and less frequent reloading, translating into convenience and sustainability.

All three models in the Kuma Stoves OC series feature high-quality craftsmanship, with materials designed for longevity and resilience. Additionally, they come with customizable options, including various finishes and door styles, allowing homeowners to select a design that complements their décor. With their combination of aesthetics, performance, and advanced technologies, the OC-7, OC-8, and OC-10 stand out as exceptional choices for those seeking reliable and stylish wood heating solutions.
Top Page Image Contents