A.O. Smith ATX-199 Instruction Manual page 30

CONTAMINATED AIR
Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
Vent Installations (page 22).
AIR REQUIREMENTS
a risk of asphyxiation.
direct vent
Direct
Breathing Hazard - Carbon Monoxide Gas
Install water heater in accordance with
the Instruction Manual and NFPA 54 or
CAN/CSA-B149.1.
To avoid injury, combustion and ventilation
air must be taken from outdoors.
Do not place chemical vapor emitting
products near water heater.
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
(page 30).
UNCONFINED SPACE
An
LESS THAN
UNUSUALLY TIGHT CONSTRUCTION
Space (page 30)
CONFINED SPACE
A space
OPENINGS MUST BE INSTALLED TO PROVIDE FRESH AIR
FOR COMBUSTION, VENTILATION, AND DILUTION IN CON-
FINED SPACES. THE REQUIRED SIZE FOR THE OPENINGS DE-
PENDS ON THE METHOD USED TO PROVIDE FRESH AIR TO
THE CONFINED SPACE AND THE TOTAL BTU/HR INPUT RAT-
ING OF ALL APPLIANCES INSTALLED IN THE SPACE. DIRECT
30
IS NOT
less than