Publicité
For clearances not specified in ANSI Z223.1/NFPA
54 or CSA B149.1, one of the following shall be
indicated:
1. The minimum distance from adjacent public
walkways, adjacent buildings, openable
windows, and building openings shall not be less
than those values specified in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54,and/or the
Natural Gas and Propane Installation Code, CSA
B149.1.
2. Information on preventing blockage by snow.
3. Information on protecting building materials
from degradation by flue gases.
NOTICE
1. In accordance with the current CSA
B149.1, Natural Gas and Propane
Installation Code.
2. In accordance with the current ANSI
Z223.1/NFPA 54, National Fuel Gas Code.
3. If locally adopted installation codes
specify clearances different than those
illustrated, then the most stringent
clearance shall prevail.
4. For other than a direct vent appliance, the
appliance must be located as close as
practicable to a chimney or gas vent.
5. The appliance should be located in an
area where leakage of the tank or
connections will not result in damage to
the area adjacent to the appliance or to
lower floors of the structure. When such
locations cannot be avoided, it is
recommended that a suitable drain pan,
adequately drained, be installed under
the appliance. The pan must not restrict
combustion air flow.
3.8 Combustion Air Supply
WARNING
The gas water heater requires a sufficient
source of clean air for combustion and
ventilation. Without enough air, your water
heater may not function properly and may
cause excessive and abnormal carbon
monoxide causing poisoning or death.
Before installing the water heater, you must be
sure to supply the required amount of air to the
water heater and any other gas equipment in the
same area and provide adequate air for
combustion and ventilation. If you are not sure of
the correct way to supply air to your water heater,
please consult a professional.
Check chemicals: The air used for combustion and
ventilation must be clean and free of corrosive
chemicals. If corrosive chemicals such as sulphur,
fluorine or chlorine are present, the water heater
must be vented directly. Failures due to these
corrosive chemicals are not covered by the
warranty.
WARNING
In all cases, ensure that there are no
corrosive chemicals in the air intake. The
presence of such chemicals at the air inlet
can result in death, personal injury or
property damage. Examples of locations
where external air is required due to
chemicals include:
Beauty salon
Ÿ
Photo Processing Lab
Ÿ
indoor swimming pool
Ÿ
Laundry, hobby or craft room
Ÿ
Chemical storage areas such as aerosol
Ÿ
sprays, detergents, bleaches, cleaning
solvents, gasoline, air fresheners, paint
and varnish removers, and refrigerants
should not be stored or used near water
heaters.
Does your installation space have enough
combustion air?
It is recommended that all installations be
ventilated with outdoor air. Even if the water heater
is installed in a large open room in a house,
outdoor air is usually required because the modern
home is very tightly sealed and usually does not
provide enough air for the water heater. However,
when installed in a large indoor space, it provides
enough air without external ventilation. If you are
not sure if there is adequate ventilation in your
installation location, please contact your local gas
company or agent for a safety check or simply vent
the water heater.
Installation
21
Publicité
