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OPEL AP
Installation
1. Remove the cover left side only.
2. Cut the insulation to the size of the opening and remove
the cover plate underneath (it is taped in place).
3. Install the back draft damper crimped side up, making
sure it is pushed all the way down. Bend out the 4 mid-
dle tabs to fasten the damper to the top of the fireplace.
From the louver opening bend out two of the lower tabs
to prevent the damper from being pulled out.
4. Before proceeding with the installation of the blower,
make sure that the electrical service to the blower is in
the OFF position. All wiring should be in accordance with
local ordinances and the National Electric Code.
NOTE: The blower can basically be installed anywhere in
the home, however some thought should go into the plan-
ning to ensure that the blower noise does not affect rooms
you would like kept quiet. If the central heating system
ductwork is passing through an area in your home that you
do not wish to be heated, then the ducting should be insu-
lated. Length of runs should be as short as possible to con-
serve space and minimize cost. Maximum duct length
should not exceed 50 feet from the fireplace to the furthest
outlet. There is a loss of about 15% performance at 50 feet.
NOTE: The blower automatically shuts off if the air tem-
perature reaches 180° F inside the ducting.
THE CENTRAL HEAT SYSTEM
Required components:
1) Part FDHC6 :
A blower control center, a thermostat
and a thermal switch.
2) Part FDHC6-1: A back draft damper
3) Part FDHB6 :
A maximum 636 C.F.M. blower with a
variable speed motor, 2 noise reduc-
tion collars, a blower speed control,
and a mounting bracket.
NOTE: Parts 2 and 3 must be used together for this sys-
tem. Use of any substitutes will de-certify the system.
The 8” back-draft damper prevents hot air from travelling
into the C vent (single wall) ducting unless the Central Heat
Blower (FDHB6) is operating. When the thermostat calls
for heat, the blower turns on and opens the one-way valve.
At the same time, the room air is drawn through the upper
and lower louvers, which mixes and reduces the overall
temperature of the forced air that travels through the duct-
ing.
WARNING: If the back-draft damper is not installed,
the central heat ducting may become too hot for the
surrounding combustible materials. Any substitute for
the FDHC6-1 kit will void all warranty coverage by RSF
Woodburning Fireplaces.
Grill and adaptater
Optional gravity
vent outlet
5
9
”
m
in
.
4” min.
2”
min.
5
9
”
m
in
.
Side view
Front view
5
9
”
m
in
.
4” min.
2” min.
2” min.
“B” vent
starter(s) here
Figure 23: Gravity vent clearances
