22
The duct system must be installed respecting the following:
1.
Remove the plates closing up the 8" dia. holes on top of the fireplace. Then, cut the
insulation in order to obtain two 8" dia. openings. Fix the adaptors on the fireplace
openings by turning clockwise (figure 15).
2.
Maintain at least a 2" (50 mm) clearance between the ducts and any combustible
material; the required hole size is 13» x 13" (330 mm x 330 mm).
Exception #1: For the grills, the framing can be 10 ¾" x 10 ¾" (275 mm x 275 mm) to
provide the clearance as required by the integral spacers on the double outlet duct system.
3.
The maximum number of elbows in a run of duct is two.
4.
Maintain at least 6 ½" (160 mm) clearance from the outlet grill framing to a combustible
ceiling, side wall or mantel.
5.
When traversing a combustible wall or floor, a firestop must be installed at the wall or
floor penetration. The hole size must be 13" X 13". (330 mm x 330 mm)
6.
Do not connect the hot air ducts to a central heating system. Malfunction of the heating
system‟s fan will cause the fireplace to overheat. A furnace d
uct is only single wall and
not double wall as is required for the BIS Ultima
™
CF fireplace hot air exhaust.
7.
Use only Security Chimneys International grills and components as described in this
manual. Other grills or registers, for example, may be too restrictive and may overheat
the fireplace or ceiling.
8.
Do not use insulated flexible ducts as they will overheat.
9.
Do not use tees or any other components than the ones specifically listed here.
10.
All ducts must extend upwards or horizontally. Never route the ducting downwards.
11.
The hot air outlet grills must be installed with the louvers pointing downwards in order to
prevent overheating adjacent ceilings.
12.
Always install the two outlet grills when using the double hot air outlet kit and blocking
the upper louver of the fireplace.
