Page 26
OPEL AP
Installation
CAUTION: Do not replace the grill from the FDV with shut-
ters. Do not allow heat to be trapped in the gravity vent sys-
tem.
1. Plan the gravity vent run first. Be aware that the maxi-
mum actual pipe length between the top of the fireplace
and the outlet is 15 feet. There is no maximum number
of elbows in a run, but the run must never go in a down-
ward direction as this can trap heat in the gravity vent
system.
2. The grill adapter is designed to be installed underneath
the gypsum board in the wall. Frame a 13" x 13"
hole to accept the gravity vent grill adapter in
the desired location. Fit the gravity vent grill
adapter into the framed hole and fasten it into
place with nails or screws. If you are installing
the outlet in an already finished area, you must
remove the gypsum board and frame a 13" x
13" hole in the existing framing, in order to meet
the required clearances.
3. Remove the outer cover to the left, right, or both
sides of the flue outlet, on the Opel AP.
4. Cut the insulation to the size of the opening and
remove the cover plate underneath (it is taped
in place).
5. Install the B-vent starter section. The slot in the
B-vent starter section should be facing the front
and the hole should be facing the back. Bend up
the four tabs at the base of the starter section to
hold it in place.
6. Install the shut-off damper at the base of the
starter section. The shut-off damper enables the
manual control of hot air flowing through the
gravity vent pipe. With the top louver removed,
and the angular portion of the rod in hand, insert
the damper rod into the hole in the starter sec-
tion. Next, make sure that the washer and
spring on the control arm are both on the out-
side of the starter section and that the rod has
fit snugly into the slot. A definite tension should
exist between the shut-off damper rod and the
starter section. Replace the louvers. The
damper rod should protrude above the top of
the louvers.
WARNING: If you are blocking off the upper louvers of
the Opel AP, do not install the shut-off dampers.
7. Install the B-vent pipe between the B-vent starter and
the grill adapter. Fasten each joint with 3 screws (if the
B-vent pipe manufacturer allows this in its instruction
manual). Insert the B-vent pipe in the grill adapter and
fasten it with three screws. The B-vent pipe needs only
to be inserted into the adapter enough to be able to
screw it in place. This allows you about 3 1/2" of play.
8. Once the wall facing around the gravity vent grill adapter
has been completed, install the grill with the supplied
screws. The gravity vent is now ready for operation.
Figure 22: Gravity vent kit (FDV)
Grill
adapter
Grill
B-vent
starter
-no ducting
-top grill open
-1 gravity vent kit
-top grill open
-central heating
duct kit
-top grill open
-2 gravity vent kits
-top grill closed
-central heating
duct kit
-1 gravity vent kit
-top grill open
-2 gravity vent kits
-top grill open
Figure 21: Remote venting options for the Opel AP
