Harman® • PF-120 Owner’s Manual_R3 • 2014 -___ • 10/14
16
3-90-08120c
D. Ash Removal
It is recommended to remove the ashes when the furnace
is not in operation. This lessens the chances of coming in
contact with hot surfaces. Ashes can be removed while in
operation but, extra care must be taken.
Open Outer Ash Door
Lift the two latches shown in Figure 5.1 and open the outer
door as shown in Figure 5.2. If the Distribution Blower is
running when the outer door is open, some air will escape
around the door opening. This is not a problem, however any
dust that is caused in the ash removal process can potentially
be blown around.
Open Inner Ash Door
Lift latches shown in Figure 5.2 and open the inner door as
shown in Figure 5.3.
NOTE: Keep hopper lid and inner door closed during
operation and maintain all seals in good condition.
Remove Ash Pan
Always wear gloves to remove ash pan. Grab the ash pan
by the handle and pull it out of the furnace. Lift the handle
and use it for carrying the ash pan.
Close the inner door
before disposing of the ashes.
Disposal of Ashes
Ashes should be placed in a metal container with a tight
fitting lid. The closed container of ashes should be placed on
a non-combustible floor or on the ground, well away from all
combustible materials, pending final disposal. If ashes are
disposed of by burial in soil or otherwise locally dispersed,
they should be retained in the closed container until all cinders
have thoroughly cooled.
Soot and Fly-ash: Formation and Need for Removal
The products of combustion will contain small particles of
fly-ash. The fly-ash will collect in the exhaust venting system
and restrict the flow of the flue gases. Incomplete combustion,
such as, during startup, shutdown, or incorrect operation of
the furnace will lead to some soot formation which will collect
in the exhaust venting system. The exhaust venting system
should be inspected at least twice monthly to determine if
cleaning is necessary.
Inner Door Latches
Outer Door Latches
Figure 5.1
Figure 5.2
Figure 5.3
