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Fabricant : Drolet
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An example of the energy values of some common wood fuels found in North America is given in the following table: Wood species Energy yield (millions of BTU/cord) High energy yield Oak 29 Sugar Maple 28 Beech 26 Yellow birch 25 Ash 24 Elm 23 Medium energy yield Larch (Tamarack) 23 Red Maple 23 Douglas red fir 23 Silver birch 22 Alder 18 Poplar 17 Hemlock 17 Low energy yield Spruce 17 Pine 17 Bass 16 Fir 13 High energy yield Oak 29 Sugar Maple 28 Beech 26 Yellow birch 25 Ash 24 Elm 23 Medium energy yield Larch (Tamarack) 23 Red Maple 23 Douglas red fir 23 Silver birch 22 Alder 18 Poplar 17 Hemlock 17 Low energy yield Spruce 17 Pine 17 Bass 16 Fir 13 Data provided by Energy, Mines and Resources – Canada TABLE 3.2 Energy yield for wood species 3.2.1 The use of manufactured logs There are numerous types of manufactured logs sold on the market. You must be very careful with this type of product. Many brands of manufactured logs contain chemical additives. DO NOT BURN ANY MANUFACTURED LOGS CONTAINING CHEMICAL ADDITIVES. If you do, you may damage your stove and void the warranty. Logs containing chemical additives burn a lot hotter and were designed for decorative fireplaces. Decorative fireplaces generally have larger, cooler, and less air-tight fireboxes. Your E.P.A Drolet stove, on the other hand, has a smaller, completely sealed firebox which attains much higher temperatures. It is therefore not designed to support excessive heat caused by the addition of chemicals in manufactured logs. Manufactured logs made of 100% wood residues do not cause any threat to your stove. You must however be careful. Manufactured logs typically release a much larger heat output over a short period of time. Therefore, you cannot place a large quantity of such logs into your stove, like you would with regular cord wood. Start with one log, and gradually increase the load to 3 or 4 logs and see how your stove reacts. Use a chimney (flue) thermometer and make sure that temperatures remain within the normal operating range. 3.2.2 Simple wood moisture test Add one large piece of wood to the top of an established fire. If it starts to burn on three sides within one minute, it is dry and seasoned and right for burning. If it turns black and starts to burn in about three minutes or more, it is damp. If it turns black and does not start burning until five minutes or more, it is green and wet. If it hisses at any time, the wood is soaked and will not burn until the excess of moisture is boiled away. 3.3 NOTES ABOUT FIRST FIRING The fresh paint on your stove needs to be cured to preserve its quality. Once the fuel load is properly ignited, only burn small fires in your stove for the first four hours of operation. Never open the air control more than necessary to achieve a medium burn rate. Make sure that there is enough air circulation while curing the stove. Open one or more windows. The odours can be smelled during the 3 or 4 first fires. Never start your stove outside. 3.4 LIGHTING A FIRE 1. Place enough crumpled balls of newspaper or other paper into the stove to cover the bottom of the firebox. 2. Place small and dry kindling on the crumpled paper. 3. Place larger and dry kindling on top of the small kindling. 4. Open the air intake control fully. (see Table 3.4) 5. Light a fire at the bottom of the crumpled paper and close the door. If the fire tends to go out momentarily, hold the door slightly ajar to activate the fire. As soon as the fire catches hold, close the door. 6. Ideally the large kindling should be burned until a thick bed of red embers is obtained. At that point, add cord wood fuel and continue to operate the draft control wide open until the fire is well established. Once the firebox is hot, the air control can be partially closed to adjust the intensity of the fire. Refer to table 3.4 to operate the air intake control properly. Intensity Draft Setting Low Move Control against the L.H. side Medium Low Move Control right by 9/16” – 1” (14.3 – 25.4mm) from closed position Medium High Move Control right by 7/8” - 1 3/4” (22.2 – 44.5mm) from closed position High Move Control against the R.H. side Table 3.4 Closing the draft control down too soon will lower combustion efficiency, and may result in creosote build-up in the chimney (which could lead to a future chimney fire). CAUTION: THE ADJUSTMENT RANGE SHOULD NOT BE ALTERED FOR INCREASED FIRING FOR ANY REASON. DAMPER OPERATION CLOSED OPENED Figure 3.4 3.5 MAINTAINING THE FIRE Once the wood has been consumed (or partially consumed) and you have obtained a good bed of embers, you should reload the unit. In order to do so, open the air control to its maximum for approximately 15 seconds prior to opening the stove door. Then, proceed by opening the door very slowly. Open it by 2” to 4” (52 to 104 mm) for 10 to 15 seconds before opening it completely. This procedure will increase the draft and thus eliminate the smoke which is stagnant in a state of slow combustion in the stove. T...