Outside Air Kit - Lennox MONTECITO ESTATE Installation And Operation Instructions Manual

The duct system must be installed respecting the following:
1. Remove the plates closing up the 8" diameter holes on top of the
fireplace. Then, cut the insulation in order to obtain two 8" dia. open-
ings. 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 10-3/4" x 10-
3/4" (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 6-1/2" (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. Malfunc-
tion of the heating system's blower will cause the fireplace to overheat.
A furnace duct is only single wall and not double wall as is required
for the Montecito Estate™ fireplace hot air exhaust.
7. Use only Lennox Hearth Products grills and components as described
in this manual. Other grills or registers 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. Never allow the ducting to pitch down as hot air will be trapped creat-
ing a fire hazard. 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.

OUTSIDE AIR KIT

It is mandatory to install an outside air connection to the Montecito Es-
tate™ fireplace. The following components are required and are included
with the fireplace:
• Outside air kit (includes 40 inch flex that goes up to ten (10) feet
long)
• 4" Adaptor for fireplace connection
Outside Air Installation
The outside air assembly may be installed according to the following
requirements:
A) Duct length should be kept to a minimum. The maximum length of a
4" interior diameter (100 mm) insulated flexible duct is 20 feet (6.1 m).
The duct can be extended to a maximum of 40 feet (12 m) using a 6"
interior diameter (150 mm) insulated flexible duct (See note below).
B) The air intake register must not be installed more than ten (10) feet
(3050 mm) above the base of the fireplace.
C) The fresh air must come from outside the house. The air intake must
not draw air from the attic, basement or garage.
D) The air intake should be installed where it is not likely to be blocked by
snow or exposed to extreme wind and away from automobile exhaust
fumes, gas meters and other vents.
E) The duct and register may be installed above or below floor level.
Make a 4-1/4" (110 mm) hole in the outside wall of the house at the chosen
location. From outside, place the outside air register in the hole (open
side down) and fasten the register to the wall with screws as shown (see
Figure 18). Slip the pipe into the insulated sleeve. Place the insulated
pipe over the register tube and over the fireplace's outside air connector
(see Figure 19). At each end, carefully pull back the insulation and plastic
cover exposing the flexible pipe. Using the aluminium tape provided,
wrap the tape around the joint between the flexible pipe and the air inlets.
Carefully push the insulation and plastic cover back over the pipe. Using
aluminium tape, fasten the plastic cover in place.
NOTE: We recommend not to exceed 20 feet of 4" flexible pipe. If you
require a longer length we recommend that you use a 5" diameter flex-
ible pipe for the complete run up to 30 feet and a 6" diameter pipe for a
run of up to 40 feet.
Outside
Intake
Screw
Opening
Facing
Down
Wall
Figure 18
Insulation
Figure 19
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
OUTSIDE CONNECTION
OUTSIDE AIR CONNECTION TO THE FIREPLACE
Fireplace
Connection
Aluminum Tape
Plastic
Cover
Flexible Pipe
Aluminum Tape
Aluminum Tape
Plastic
Cover
Insulation
Flexible Pipe
Aluminum Tape
Fireplace
13