ORACLE
3. Mortar must be "thin set" or "thin bed" type, inher-
ently polymer modified. Do not add water to the mix-
ture (this applies to the grout as well). If the mortar is
not modified, you should add a synthetic latex addi-
tive. Mix to a firm, moist consistency.
4. Using a plasterer or mason's trowel, apply a scratch
coat that covers the wire mesh. Let the mortar set
before adding another coat. This will take several
hours. Afterwards, apply a thinner coat and the fac-
ing. Do not spread plaster over more than a work-
able area so that the mortar will not set before the
facing is applied.
5. If additional mortar is required, use a grout bag to fill
in joints. Care must be taken to avoid smearing on
the surface of the stone or brick.
REMOTE VENTING
The gravity vent system can distribute air to an upper
level or to a room next door without an extra blower.
Figure 16 illustrates various configurations.
THE GRAVITY VENT SYSTEM (FDVO)
The FDVO Kit includes:
- A grille
- A grille adaptor
- A B-vent starter section
- A shut-off damper
IMPORTANT:
No substitution of any of these parts is
allowed. These genuine RSF Woodburning Fireplaces
parts have the correct clearances. These clearances
must be maintained for your safety.
The FDVO system incorporates standard 8" B-vent
components for installation. Single wall pipe is not
allowed due to the high temperature of the air in a grav-
ity vent system. Any listed brand of 8" B-vent pipe may
be used and is not a part of the FDVO. The maximum
pipe length is 15 ft. from the top of the fireplace to the
outlet. Remember: double wall black pipe from
ICC
can
be used instead of B-vent pipe.
NOTE:
If two gravity vent lines are installed, then two
FDVO kits must be ordered.
Figure 18 indicates the minimum clearances and fram-
ing dimensions. Passing through a combustible wall or
ceiling requires a minimum 13" x 13" opening.
WARNING: Every measurement and clearance on
the illustrations must be followed to assure safety
of the installation.
Installation
CAUTION:
Do not replace the grille from the FDVO
with shutters.
Do not allow heat to be trapped in the gravity vent system.
1. Plan the gravity vent run first. Be aware that the
maximum distance between the top of the fireplace
and the outlet is 15 feet. There is no maximum num-
ber of elbows in a run, but the run must never go in
a downward direction as this can trap heat in the
gravity vent system.
page 15
grille adapter
rear side
grille
“B” vent
starter
Figure 17: Gravity vent kit (FDVO)
8”
Figure 18: Gravity vent clearances
4" min.
13" min.
59" min.
59" min.
2" min.
B-vent
starter(s)
here
front view
grid
Figure 16: Remote venting
no ducting
1 gravity
vent kit
2 gravity
vent kits
