Harman Stove Company SF-150 SF-250 manual Creosote and Soot

Page 8

The most common cause of poor draft is an improperly sized flue liner. We recommend that the chim- ney liner’s inside dimensions be at least as large as the appliance’s col- lar size and no larger than 125% of the collar for a round flue. For instance, an 8" furnace collar is 50 square inches; increased by 25"% would be 63 square inches, or approximately a 9" round flue. In general for round liners we recom- mend that they not be increased more than 1" from that of the Harman’s collar size. The reason for the above is that Harman appli- ances are designed to produce the maximum amount of heat per amount of fuel burned. A a result, the flue gas temperature is lower than for some similar equipment.

TO SUMMARIZE, A HEATING UNIT CAN PERFORM ONLY AS WELL AS ITS VENTING SYSTEM WILL ALLOW IT.

5.Creosote and Soot

5.1General and Specific C reosote Maintenance Wa rn i n g s

One of the most critical aspects of operating a woodburning stove is the control of creosote and soot. This is especially important when there is a low demand for heat, such as in the fall or spring. A good understanding of the causes and cures for excess creosote or soot formation is essential to the opera- tion of the stove.

Your stove and for that matter, all types and makes of woodburning equipment will give trouble with cre- osote deposits under certain condi- tions. You should be aware of these conditions and avoid them.

When wood is burned slowly, it pro- duces acetic and other pyroligneous acids that combine with expelled moisture to form creosote. Highly combustible in its solid and semi-liq- uid states, creosote is present in the gases given off by burning wood. Creosote may build to a consider- able thickness on the interior sur- face of the chimney and stove pipe subsequently reducing draft. A SERIOUS FIRE MAY BE IGNITED IF A SUFFICIENT CREOSOTE BUILDUP IS PERMITTED.

Creosote condenses from the flue gases more quickly when the tem- perature of those gases is low. The actual amount of creosote deposited depends on (1) the amount of mois- ture in the flue gases, (2) the tem- perature of the stack, (3) the rate at which the wood is burned, (4) the amount of draft in the stack, and (5) how completely the combustible ele- ments in the flue gases have been burned in the combustion chamber. Most problems with creosote are due to insufficiently dry wood, poor chimneys with low draft and cold

walls, and/or a low rate of burning when little heat is required during the spring and fall months.

Moisture in the Flue Gases May Be Controlled by:

A. Using properly seasoned fire- wood.

B.Mixing small pieces with every full load.

C.Never using only large (usually less dry) wood during mild weather when combustion is relatively slow.

The Temperature in the Stack May be Controlled by:

A. Using as short a length of stovepipe as possible between the stove and the chimney.

B.Using an insulated flue pipe to connect the stove to the chimney.

The Amount of Draft in the Stack May be controlled by:

A . Having as few bends as possible.

B. Insuring adequate chimney height and preventing air leaks.

C. Eliminating external obstruc- tions in the chimney outlet.

D.Having only one appliance per flue.

C A U T I O N ! O W N E R ’ S R E S P O N S I B I L I T Y

YOU MUST CHECK YOUR CHIMNEY FLUE PIPE CONNEC- TOR FREQUENTLY WHEN FIRST STARTING TO BURN WOOD TO DETERMINE THE AMOUNT OF CHIMNEY MAINTENANCE (CLEAN- ING) THAT WILL BE REQUIRED. THIS OF COURSE, IS ALSO DEPENDENT ON WOOD TYPE, MOISTURE, AND IN GENERAL, HOW THE STOVE IS USED.

The chimney connector and chim- ney should be inspected at least twice monthly during the heating season to determine if a creosote

Page 7 Page 9
Image 8
Page 7 Page 9
Contents Installation and Operator’s Manual SF-150 SF-250 Thank you Index Safety Considerations Accessories Heat CollectorAssembly Chimney O T H E R a P P L I a N C E S should be Vented to this FlueRecommended Sizing Chimney Flue Liners Creosote and Soot Electrical FuelWa rn i n g s I rewood and Coal Fuel I n f o rmation SheetGrates Grate System and Contro l sClearance to Combustibles Models SF-150, SF-250 IMPORTANT! the Flue Pipe Must be 24 Gauge or THICK- ERPreventive Maintenance Instructions Operating Instructions Starting a Wood FirePage Warranty Optional Hot Water CoilSerious damage to the stove can occur from overheating REMEMBER! Coal Gases are ToxicTHERMO-SYPHON Method Less than 10 Feet Plumbing Diagram for Circulating Pump Method More than 10 FT Page Harman Central Heat Warranty

SF-150 SF-250 specifications

The Harman Stove Company has long been a name synonymous with quality and innovation in the world of heating appliances. Among its remarkable lineup are the SF-150 and SF-250 pellet stoves, which exemplify the brand's commitment to efficiency, ease of use, and environmental sustainability.

The SF-150 model is known for its compact design, making it ideal for smaller spaces without compromising on heating performance. With a heating capacity of up to 1,800 square feet, the SF-150 is perfect for medium-sized homes. This model boasts a sleek, modern aesthetic that complements various decor styles while providing a warm, inviting atmosphere.

One of the standout features of the SF-150 is its advanced combustion technology. Harman's patented Feed System ensures a consistent and efficient burn, maximizing the stove’s fuel economy. The unique air wash system keeps the glass clean, allowing for an unobstructed view of the flames and a cozy ambiance. Additionally, the SF-150 employs smart control technology, enabling users to adjust settings easily and remotely, ensuring optimal comfort at all times.

Moving on to the SF-250, this model is designed for larger spaces and offers a powerful heating output of up to 2,200 square feet. Its robust build and substantial hopper capacity allow for extended burn times with fewer refills, making it a convenient option for homeowners with busy lifestyles. The SF-250 also features a top-loading design, simplifying the process of adding fuel without the mess.

Both models are equipped with Harman's patented Smart Control technology, which allows users to monitor and control their stoves via a mobile app. This feature adds convenience, as it enables remote operation and monitoring of fuel levels, burn rate, and temperatures from anywhere in the home.

In terms of construction, both the SF-150 and SF-250 are built with high-quality materials, ensuring durability and longevity. Their EPA-certified designs make them environmentally friendly options, producing minimal emissions and promoting clean burning.

Whether you choose the SF-150 for its compact functionality or the SF-250 for its powerful heating capability, Harman Stove Company's pellet stoves stand out for their blend of modern technology, aesthetic appeal, and efficient performance. These models not only provide warmth and comfort but also contribute to a sustainable future.
Top Page Image Contents