Lifebreath 4TONDHW(T) - Manual (Page 24)

Locating Intake Weatherhood
The intake weatherhood should be located
as follows:
• 4 - 6' from ventilation exhaust hood, and
upstream of prevailing winds, if possible.
• At least 6' from a dryer vent, oil fill pipes,
combustion outlets, gas meters, garbage
containers or anything else, which may
contaminate the air.
• Do not locate fresh air intake in garages,
crawl spaces or attics.
• Install 18" above grade, or above
expected snow accumulation.
Locating the Exhaust Weatherhoods
The Exhaust Weatherhood should be located
as follows:
• At least 4-6' from the supply inlet
•
At least 18" above grade or expected
snow accumulation
• At least 3' from gas meters, combustion
vents, or dryer vents
•
Do not install in garages, crawl spaces
or attics
Outside Ducting the Weatherhoods
The ventilation portion of the Clean Air Furnace
can be vented off either side of the unit by
removing knockouts provided. Once the knock
outs in are removed, a bead of silicone can be
placed on the plastic thermo-collars
(provided), to form a seal between the collars
and the cabinet. The collars can then be
fastened into place with screws. Note the
exhaust outlet is always the port on the bottom,
and the supply inlet is always the port on the top,
both ports should be labeled from the factory
as such.
The ductwork from the outside weatherhoods to
the unit, is usually flexible ducting, although rigid
pipe may be needed if the runs are greater than
20 feet. In either case the pipes (both exhaust
and supply and the added fittings) must be
insulated, with a complete vapor barrier.
To minimize restriction in airflows the ducting
should be short, with as few bends as possible.
See diagram below for recommended connection
of insulated ducting to outside weatherhoods.
HOOD
BIRD
SCREEN
BELT OF OUTSIDE WALL
THERMAL COLLAR
INSULATED FLEXIBLE
DUCTING
1/ Thermal Collar slides over galvanized
sleeve of Weatherhood.
2/ Fasten Thermal Collar to Belt.
3/ Slide the Insulated Flexible Ducting over
the Weatherhood’s galvanized sleeve and
fasten it to the Thermal Collar.
4/ Hood is hinged to allow for easy access
for cleaning of bird screen.
WEATHERHOOD INSTALLATION
Locating Weatherhood
24