Lennox Cascade Installation And Operation Manual page 22

Ash Pan
Note: Periodically check for ash build up under the Ultragrate™. If the
ash is allowed to build up to the bottom of the UltraGrate™, there will be a
loss of combustion air and the pellets will start to pile up on the grate.
CAUTION: Disposal of Ashes - Ashes should be placed in a metal con-
tainer with a tight fitting lid. The closed container should be placed on
a non-combustible floor or the ground - well away from all combustible
materials, pending final disposal. If the ashes are disposed of by burial
in soil or otherwise locally dispersed, they should be retained in the
closed container until all cinders have been thoroughly cooled.
Figure 26
- Emptying Ash Pan
Soot and Flyash:
Formation and need for removal - The products of combustion will contain
small particles of flyash. The flyash will collect in the exhaust venting
system and restrict the flow of the flue gases. Incomplete combustion,
such as occurs during startup, shutdown, or incorrect operation of the
room heater will lead to some soot formation which will collect in the
exhaust venting system. The exhaust venting system should be inspected
at least once every year to determine if cleaning is necessary.
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 Tee cap on vertical installations will allow an inspection
of the ash build-up in the exhaust Tee and will help you to decide how
frequently more extensive cleaning must be performed.

(Recommended Frequency
of  days –  weeks)
Ash Pan
Heat Exchange Tubes
ENSURE STOVE IS COLD BEFORE CLEANING HEAT EXCHANGE
TUBES.
Remove Fly-ash from heat exchange tubes as follows:
1. Ensure the door is secured closed.
2. Open the hopper lid (see Pellet Fuel Hopper, Page 21).
3. Using the hole in the handle of the grate scraper tool, "grab" onto the
heat exchange rake handle located above the door (in the center).
4. Pull the grate scraper tool back and forth several times (upward and
forward, then back) to rake a way Fly-ash from the heat exchange
tubes.
Note: If a more thorough cleaning of heat exchange tubes is desired, the
baffle plate in front of the tubes can be easily removed (slide baffle plate
forward until screw heads clear the notches on each side, then remove
baffle). With baffle plate removed, use a small brush to clean between
tubes (see Pages 22 and 32, item #3).
Note: The baffle plate should be removed at least once a year to allow
for a thorough cleaning.
WARNING
DO NOT USE BRUSH ON HOT STOVE
Removing Fly-ash from Heat Exchange Tubes
Rake Movement"
Tube
Scraper
Recommended
Frequency of
 days –  weeks
Figure 27 -
Cleaning Heat Exchange Tubes
Heat Exchange
Tubes (close-up)
Heat Exchange
Rake Handle