OPEL PLUS KEYSTONE Owner's Manual
9
RSF Woodburning Fireplaces
Table 2 Various Mantel Depths and Corresponding Installation Heights
Maximum Mantel Depth
Minimum Installation Height
0" to 4"
32"
6"
33
1
/
8
"
8"
34 ¼"
10"
35
3
/
8
"
12"
36 ½"
No combustible mantel can be installed lower than 32" above the top of the firebox opening. A combustible mantel
cannot be wider than 12".
For combustible mantel depths not mentioned in the list above, you can interpolate the minimum installation
height between the two closest mantel depths. For example:
•
Mantel depth to be installed:
9 ¼"
•
It is between 8" and 10" with corresponding installation heights of 34 ¼" and 35
3
/
8
"
•
So: ((9.25 – 8) / (10-8) x (35.375 - 34.25)) + 34.25 = 34.95 = 35"
•
Minimum installation height of a
9 ¼"
mantel:
35"
above the firebox opening.
If the combustible mantel has a cross-section with variable depth, it must be installed so that its widest part is not
installed lower than the corresponding minimum installation height while making sure that the lowest point of the
mantel is not installed lower than the minimum installation height corresponding to its depth.
Refer to the "Installation: Mantel" section for details.
OPERATION
AIR CONTROLS
Unlike most open fireplaces, RSF fireplaces don’t have flue
dampers. Instead, the system is sealed by closing the door, and the
amount of air entering the firebox is controlled by the combustion
air control lever on the front of the fireplace on the right below the
door (see Figure 2) which can be moved up or down. Setting the air
control lever all the way open (up) will allow the maximum amount
of air into the firebox. Closing the air control (down) will reduce the
amount of air entering the firebox.
Bi-metallic Damper
The bi-metallic damper is a unique feature built into your OPEL+
KEYSTONE fireplace. As the fireplace heats up it will activate the
bi-metallic damper. This will automatically begin to shut down the
air entering the firebox, slowing the combustion process. This will
save you wood in the long run, and prevent the fireplace from
overheating and causing potential damage to the firebox.
We
suggest that the combustion air control lever is used as the
primary control to limit the oxygen entering the firebox, and
that the bi-metallic damper is left as an additional safety
system.
Outside Air Control
The OPEL+ KEYSTONE has been designed to offer you the choice to use outside air or inside air for combustion.
You will find a sliding door behind the bottom louver and below the firebox. Push the sliding door towards the back
Figure 2 Air Control
