Lennox Hearth 32FS UltraGrate Burn Grate, Ash Slide Plate, Ash Pan, Creosote Removal

UltraGrate™ (Burn Grate)

Inspect the UltraGrate periodically so that the air holes don't clog with ash or clinkers. The UltraGrate can easily be cleaned with the grate scraper tool, or it can be removed. It is very important to monitor the ash build up under the UltraGrate, as too much of ash will block combustion air from entering the grate, causing pellets to pile-up in the grate. The ash build-up under the grate is easily dumped into the ash pan by pulling out the ash slide weekly (see Ash Slide Plate, Figure 30).

(Recommended Frequency of 1 day – 2 weeks)

UltraGrate

The grate scraper tool fits into this slot for easy removal

Figure 29 - Inspect UltraGrate and Clean if Necessary

Ash Slide Plate

Ash that accumulates around the grate can be “dropped” into the ash pan as follows:

1.Open the firebox door.

2.Pull open the ash release slide plate as shown in Figure 30.

3.Using a brush, sweep the ashes from the firebox through openings to the ash pan.

4.Close the ash slide plate, then close the firebox door.

IMPORTANT NOTE: Make sure to fully close the ash slide plate when complete. Failure to close the ash release slide plate completely may cause the fuel to burn poorly (due to reduced air flow through the grate), which may then cause pellets to “pile up” in the grate. The ash slide must be fully closed for the firebox door to close.

(Recommended Frequency	Sweep ashes into
of 1 day – 2 weeks)	openings on sides

Ash Pan

The ash pan will have to be emptied periodically, depending on amount of fuel consumed. The ash pan is located in the pedestal. See Figure 31.

Ash Pan

	(Recommended Frequency
Figure 31 - Ash Pan	of 2 days – 2 weeks)

Creosote Removal

When wood is burned slowly, it produces tar and other organic vapors, which combine with expelled moisture to form creosote. The creosote vapors condense in the relatively cool chimney flue of a slow-burning fire. As a result, creosote residue accumulates on the flue lining.

When ignited this creosote makes an extremely hot fire. The chimney connector and chimney should be inspected at least once every two months during the heating season to determine if a creosote buildup has occurred.

If creosote has accumulated it should be removed to reduce the risk of a chimney fire.

Exhaust Passages And Vent Pipe

Inspect frequently and clean when necessary. Fly-Ash will accumulate at all bends in the exhaust system.

Note: Large amounts of fly-ash build-up will create a lack of combustion air. Removing the clean-out tee cap on vertical installations will allow an inspection of the ash build-up in the clean-out tee and will help you to decide how frequently more extensive cleaning must be performed.

Ash Slide Plate

Figure 30 - Using the Ash Slide Plate

Rain Cap

Clean-Out Tee

(Minimum Frequency of 1-2 months)

Remove cover, then remove ash

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Figure 32 - Clean Vent Components

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE