Lennox Hearth T300P - Manual (Page 22)

ROUTINE MAINTENANCE
* Inspect your stove or insert at minimum frequency stated until you establish a minimum frequency required for
your installation (frequency will vary depending upon fuel BTU value / ash content, usage, and misc. installation
variables).
Page 22
ROUTINE CLEANING
Note: Stove will need to be shut off and cooled enough to
handle before routine cleaning is performed.
Always disconnect power before doing any routine clean-
ing.
The following areas need to be inspected and cleaned
during routine cleaning:
• UltraGrate (burn grate)
• Ash Slide Plate
• Ash Pan
• Heat Exchange Tubes
• Photoeye
• Exhaust Passages and Vent Pipe
• Gaskets
• Window Wash
• Rear Stove Compartment
UltraGrate
 (BURN GRATE)
The UltraGrate  should be inspected periodically to as-
sure that the air holes have not become clogged with ash
or clinkers. The UltraGrate
 can easily be cleaned with
the grate scraper / ash pan tool, or it can be removed for
cleaning. It is very important to monitor the ash build up
under the UltraGrate
, as excessive amounts 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 as shown below. The grate cleaning
procedure is the same for all models.
UltraGrate 
* (Recommended Frequency of 1 day – 2 weeks)
ASH PAN
The ash pan will have to be emptied periodically, de-
pending on amount of fuel consumed. The T300P Series
ash pan is pulled straight out using the black pull knob
located on the front of the ash pan (see following pic-
ture).
Ash Pan
* (Recommended Frequency of 2 days – 2 weeks)
ASH SLIDE PLATE
Ash that accumulates around the grate can be “dropped”
into the ash pan without opening the firebox door. Simply
pull open the ash release slide plate as shown in photo
using the grate scraper tool provided. Remove the ash
pan as shown. Note: Make sure to fully close the plates
when finished. Failure to close the ash release slide
plates completely may cause the fuel to burn poorly (due
to reduced airflow through the grate), which may then
cause pellets to “pile up” in the grate.
Ash Slide Plate
*(Recommended Frequency of 1 day – 2 weeks.)