FUEL

Pellet Fuel Hopper - It is recommended to open the hopper lid by grasping it on the side as shown in Figure 35.

Open Hopper Lid by Grasping the Side

BE VERY CAREFUL NOT TO TOUCH

OTHER HOT AREAS ON STOVE!

Figure 35 - Hopper Lid, Profile 20 FS-2

Clinkering - Silica (or sand) in the fuel, along with other impurities, can cause clinkering. A clinker is a hard mass of silica formed in the burning process. Clinkering is a function of the fuel, (not the stove), but adversely affects the performance of the stove by blocking off the air passages in the grate. Even P.F.I. approved pellet fuel may tend to clinker. A clinker can be removed from the UltraGrate™ and placed in the ash pan with the use of the grate scraper

/ash pan tool furnished with your stove. See Routine Maintenance (on Pages 22 to 28) for more information on cleaning.

Ash - The frequency of removal of the ash and maintenance performed on the stove is directly proportional to the ash content of the fuel and the operation duration of your pellet stove. Low ash fuel may allow longer intervals between cleaning, however, a stove burning high ash fuel may need to be cleaned as often as everyday.

PLEASE NOTE: Lennox Hearth Products has no control over the manufacturing of pellet fuel and will not be held responsible for poor stove performance or any damage caused by poor quality pellet fuels.

Fuel Feed Rates - Different brands of pellets will feed at varying rates due to their size and density (length and diameter). This may require a slight adjustment in the damper control (see Page 9) or the fuel feed trim to compensate (see note at the top of Page 19).

22

Figure 36 - UltraGrate™

Fuel SpeciÞcations - Using the UltraGrate burn system, this appliance has been designed to burn wood residue pellets with up to 3% ash content. Agricultural pellets (i.e. corn, alfalfa etc.) are not permitted to be burned in these appliances. Dirty fuel will adversely affect the performance of the stove.

CAUTION: THE USE OF UNAPPROVED, DIRTY, WET AND / OR HIGH SALT CONTENT FUEL WILL VOID THE WARRANTY!

Wood pellets manufactured to the pellet fuels institute (P.F.I.) certification standard are available in two grades, Standard and Premium. The primary difference between the two is the ash content of the pellets.

The P.F.I. speciÞcation for standard grade and premium grade residential pellet fuel is as follows:

•CHLORIDES (Salt): Less than 300 p.p.m.

•BULK DENSITY: 40 lb. / Cu. Feet minimum

•MOISTURE CONTENT: 8% maximum

•ASH CONTENT: < 3% maximum (standard grade) < 1% maximum (premium grade)

•FINES: 0.5% maximum through a 1/8” screen

•BTU CONTENT: Minimum 8200 BTU per pound.

Pellet Feed / Pellet Size - The pellet feed system is designed to handle a wide range of pellet sizes up to a maximum of 5/16” diam- eter. Different pellets may feed at considerably different rates. You may notice a difference in the burn if you change pellet fuel sizes. The longer the pellet, the slower it will feed and vice versa. If the stove will not stay burning at the minimum fuel feed setting, those particular pellets may not be feeding fast enough. If this happens, reduce the amount of combustion air by adjusting the damper. See Page 9 before adjusting the damper.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE

Long Burn Time - When operated correctly, this appliance cannot be overfired. Continuous operation at a maximum burn can, however, shorten the life of the electrical components (blowers, motors, and electronic controls), and isnotrecommended.Typicalapprovedoperation would include running at the low to mid range setting with occasional running on the maximum setting during the coldest periods of the winter. The blower speed control should be turned to high when operating the stove on the high heat setting. A lower heat setting is recommended for overnight operation or when the room is vacated for long periods of time.

Note: See Fuel Delivery Rate on Page 20 for burn times.

ROUTINE MAINTENANCE

Cleaning

IMPORTANT

Unplug and Ensure Stove is Cold Before Performing Any Maintenance Work.

The following areas need to be inspected and cleaned during routine cleaning:

•Heat Exchange Tubes / Tube Scraper

•Baffle Plates

•Window Wash

•Ash Clean-Out Ports

•UltraGrate (Burn Grate)

•Ash Slide Plate (free-standing models only)

•Ash Pan

•Exhaust Passages / Vent Pipe and Creosote Removal

•Gaskets

•Photoeye

•Paint Touch-up

•Cleaning Rear Stove Compartment

Heat Exchange Tubes (All Models)

Clean Heat Exchange Tubes Only When The Appliance is Cool.

Tube Scraper

Using the hole in the handle of the Grate Scraper Tool to “grab” onto the rod. Using the Grate Scraper Tool, pull the rod up and out towards the opening of the firebox. Continue pulling until the Tube Scraper reaches the top of the firebox. The rod is located on the outside, above the door. Pull the tube scraper out, then repeat 2–3 times to remove fly ash from the heat exchange tubes.