Unit installation

9
WARNING
FOR SAFE OPERATION PROVIDE ADEQUATE AIR FOR
COMBUSTION AND VENTILATION. AN INSUFFICIENT SUPPLY
OF AIR WILL CAUSE RECIRCULATION OF COMBUSTION
PRODUCTS RESULTING IN AIR CONTAMINATION THAT MAY
BE HAZARDOUS TO LIFE. SUCH A CONDITION OFTEN WILL
RESULT IN A YELLOW, LUMINOUS BURNER FLAME, CAUSING
CARBONING OR SOOTING OF THE COMBUSTION CHAMBER,
BURNERS AND FLUE TUBES AND CREATES A RISK OF
ASPHYXIATION.
Where an exhaust fan is supplied in the same room with a heater,
sufficient openings for air must be provided in the walls.
UNDERSIZED OPENINGS WILL CAUSE AIR TO BE DRAWN
INTO THE ROOM THROUGH THE CHIMNEY, CAUSING POOR
COMBUSTION. SOOTING MAY RESULT IN SERIOUS DAMAGE
TO THE HEATER AND RISK OF FIRE OR EXPLOSION.
UNCONFINED SPACE
In buildings of conventional frame, brick, or stone construction,
unconfined spaces may provide adequate air for combustion,
ventilation and draft hood dilution.
If the unconfined space is within a building of tight construction
(buildings using the following construction: weather stripping,
heavy insulation, caulking, vapor barrier, etc.), air for combustion,
ventilation and draft hood dilution must be obtained from outdoors.
The installation instructions for confined spaces in tightly
constructed buildings must be followed to ensure adequate air
supply.
CONFINED SPACE
When drawing combustion and dilution air from inside a
conventionally constructed building to a confined space, such a
space shall be provided with two permanent openings, ONE IN
OR WITHIN 12 INCHES (30.48cm) OF THE ENCLOSURE TOP
AND ONE IN OR WITHIN 12 INCHES (30.48cm) OF THE
ENCLOSURE BOTTOM. Each opening shall have a free area of
at least one square inch per 1000 Btuh (6.45 square cm) of the
total input of all appliances in the enclosure, but not less than 100
square inches (645 square cm, 293 Kwh).
If the confined space is within a building of tight construction, air
for combustion, ventilation, and draft hood dilution must be
obtained from outdoors. When directly communicating with the
outdoors or communicating with the outdoors through vertical
ducts, two permanent openings, located in the above manner,
shall be provided. Each opening shall have a free area of not
less than one square inch (6.45 square cm) per 4000 Btuh (1.17
Kwh) of the total input of all appliances in the enclosure. If
horizontal ducts are used, each opening shall have a free area of
not less than one square inch (6.45 square cm) per 2000 Btuh
(.58 Kwh) of the total input of all appliances in the enclosure. For
Canadian installations consult CAN/CSA B149.1 or .2.
DRAFT DIVERTER INSTALLATION
Before turning on the appliance, examine the rating plate label
on the appliance for reference to usable draft hood assemblies.
Examine your draft hood assembly for an identification part number
(label). If your draft hood assembly number does not match the
draft hood assembly number found on the rating plate or if the
draft hood assembly number is not shown to be a “replacement
part” for the one on the rating plate - YOU HAVE THE WRONG
DRAFT HOOD ASSEMBLY. Contact your supplier or distributor
and order the “correct” draft hood assembly.
The draft hood furnished with this heater is already installed on
the appliance. Provision must be made if it is installed in confined
space or a small room to accommodate draft hood spillage and
avoid risks described in previous steps. The upper air opening
called for in the AIR REQUIREMENTS section of this manual is
for this purpose. See “FEATURES-AUTOMATIC FLUE DAMPER
DEVICE” for additional information.
FIGURE 6
Please pay attention to the following concerning the drafthood
assembly.
• Keep conduit harness free of draft hood relief area and from
unnecessary contact with drafthood.
• The electrical plug from the heater conduit harness can be
attached only one way and the plug will lock in place when
fully inserted.
FIGURE 5