52
Rev. 05/2020
53
Rev. 05/2020
Creosote
Creosote - Formation and Need for Removal -
When coal 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 twice monthly during the
heating season to determine if a creosote buildup has occurred.
If creosote has accumulate it should be removed to reduce the risk of a chimney fire.
DO NOT connect to a chimney flue serving another appliance.
Flue
Principles of the Flue
The flue allows the passage of heat, smoke, and gases from the
firebox to the chimney. Because the flue is surrounded
with Heat Transfer Fluid (HTF), heat is transferred to the HTF
surrounding the flue. This captures heat that would otherwise be
lost out the chimney, assisting in the process of a more efficient
burn.
Maintenance
Only dust should accumulate in the flue.
If creosote develops,
the cause should be determined an eliminated.
1) Inspect and clean the flue once a month during the
heating season.
2) Remove the one-half inch nuts holding the flue cover and
remove the cover.
3) Using the flue scraper provided with the HEATMOR™
furnace, push the dust to the front of the flue and let it fall
down into the firebox. Remove this dust as you would
ashes. If a lot of dust is dropped down, be certain that the
air slot of the front air box is not covered.
4) Re-attach the flue cover plate, making sure to tighten the
nuts to make an airtight seal.
5) If the HEATMOR™ Furnace unit is shut down for the
summer, inspect and clean the flue for the next heating
season.
Flue Cover
Principles
The flue cover is airtight and provides access to the flue for cleanout.
Flue Scraper
Principles
The flue scraper is provided for cleaning the flue only and is not designed to be used for
other purposes.
Flue
Removing Flue Cover
Flue Scraper
CHAPTER 16
ASHES
Ash Management and Ash Removal
1)
If ash management is deficient, the HEATMOR™ will not perform to its optimum.
It is time well spent to ensure proper ash management. In the long run, the operator
will be paid back many times over in higher efficiency and better performance.
Improper ash management results in one unfavorable condition starting a chain
reaction of additional problems.
2) Allow
all
coal in the firebox to fully burn out every day or two, and use this opportunity
to rake the ashes in the firebox, down into the grates. By timing the loading of coal so
the HTF temperature drops approximately 10 degrees below the low HTF temperature
set-point, means all fuel in the firebox is used up, and the only thing burning are the
ashes. An hour or two of this condition will ensure an easy, smoke free opportunity to
rake the ashes.
When all fuel has been burned out of the ashes, they will be a pale brown color. With a light
raking assistance, they will fall through the grates into the ash pan below. It is best to rake
the area over the grate, every day, such that the grates are at least 25 percent clear of ash.
This allows upward movement of combustion air.
NOTE:
You Can Obtain Ash Rakes From Your Local Dealer
3)
If the ashes don’t flow into the ash pan while being raked, the ash pan is possibly full.
Removing the ashes from the ash pan before it is completely full ensures the proper
airflow from below the grates is maintained and also ensures the ashes can drop
through the grates into the ash pan.
NOTE:
Ashes should be removed before the ash pan is completely full.
4) Be careful not to pull the ashes too close to the front (or the rear) of the firebox,
blocking off the combustion airflow from the air boxes.
5) Do not allow ashes to build up on top of the grates. Air needs to flow through the
grates to fuel the fire. A blocked grate can cause inefficient or non-existent combustion
conditions.
6) A rule of thumb with coal is to remove ashes daily as coal has a high ash content.
Coal requires a large amount of undergrate air so the ash pan needs to be kept clean.
If you find that it is not necessary to clean ashes daily adjust schedule as needed.
7) Coal has a high amount of minerals as well as ash content and may form “clinkers”. It
is recommended to agitate the coal/ash on the grates with rake as often as every 12
hours to break these up and cause ashes to fall through the grates. Any large pieces
that don’t break can be removed with a spade or fire tongs.
8) Completely burned ashes will appear like flour. They may be dusty when being
removed with the auger.
A particle mask should be worn when removing ashes
with the auger.
9) Removed ashes should be stored in a
steel
container, sealed with a
steel
tight fitting
lid, and placed in an area free of combustible materials for a few days, to allow the
ashes to completely cool before being disposed.