Service manual

150158 Rev. 2 August - 2010
PAN INSTALLATION AND CONSTRUCTION MUST
CONFORM TO LOCAL CODES AND ORDINANCES.
IF NOT INSTALLED AND OPERATED IN ACCORDANCE
WITH THESE INSTRUCTIONS, UNDER NO CIRCUM-
STANCES WILL THE MANUFACTURER OF THIS
WATER HEATER BE LIABLE FOR ANY WATER
DAMAGE OR INJURY IN CONNECTION WITH THIS
WATER HEATER.
VENTING
WARNING
The installer to check the installation for venting and for
spillage all around the draft hood relief opening after five
minutes of operation the method to check for flue products
spillage should utilize a flame or a match, or candle or smoke
or flame form another source such a cigarrete or grill lighter
wand. The procedure used should be to play the flame or
smoke around the perimeter of the draft hood from the outside.
If spillage is encountered, it would be manifested by smoke
escaping away from the draft hood or by the flame being
extinguisthed while outside of the hood.
Good venting would be indicated by smoke and the flames
being drawn into the draft hood.
Vent Size
Model Vent Size
D-80-125 AS 5”
D80-165AS, D80-180AS, D80-199AS
6”
D100T-199AS, D100-199AS, D100-250AS, D100-270AS 6”
D100-300AS 7 ”
D75-365AS, D75-399AS 8 ”
D80-512AS 10 ”
Models above may also have prefix “N” (LO-NOX).
*Note: Some models are equipped with draft hoods with
removable reducers for use with larger vents. Vents size must
comply with requirements of local codes or in the absence of
local codes with the provisions of National Flue Gas Code
ANSI Z 223.1 / NFPA 54 latest edition.
ALL AMERICAN STANDARD COMMERCIAL WATER
HEATERS BEGINNING MODEL NUMBERS STARTING
WITH A NUMBER OR THE LETTERS N OR D MAY BE
INSTALLED AS REPLACEMENTS WITH VENTING THAT
MET THE EXISTING CODES AT THE TIME OF THE
INSTALLATION OF THE ORIGINAL WATER HEATER.
Draft Diverter - This water heater has been shipped with a
draft diverter for which it was designed with reference to the
horizontal and vertical planes. If removed, the draft diverter
shall be replaced in the same position and secured to the jacket
top by the screws with which it was installed.
Vent Piping - This water heater must be connected to a
masonry chimney or venting system approved by local codes
or ordinances. The vent connector used to attach the draft
diverter outlet to the chimney or approved vent must be of the
same diameter as the draft diverter outlet or larger. For proper
venting in certain installations, a larger vent connector may be
needed. Consult venting tables in National Fuel Gas Code
ANSI Z223.1/NFPA 54 latest or current or local code officials
for proper application in your area.
4
CAUTION
The draft diverter relief opening of the water heater and the
combustion air inlet must be in the same atmospheric
pressure zone. Large exhaust fans in kitchens or other
locations can lower the air pressure inside an enclosure and
interfere with proper operation and venting of the water heater.
In these cases, the water heater should be installed in a separate
room with combustion and ventilation air supplied directly
from outdoors as previously described.
Corrosive Atmosphere - Water heater corrosion and
component failure can be caused by the heating and breakdown
of airborne chemical vapors. Spray can propellants, cleaning
solvents, refrigeration and air conditioning refrigerants,
swimming pool chemicals, calcium and sodium chloride,
waxes, and process chemicals are typical compounds which are
potentially corrosive. These materials are corrosive at very low
concentration levels with little or no odor to reveal their
presence.
Products of this sort must not be stored near the water heater,
nor should air which is brought in contact with the water
heater contain any of these chemicals. Flammable vapors may
be drawn by air currents from other areas of the structure to
this appliance. If necessary, uncontaminated air should be
obtained from remote or outside sources.
THE WARRANTY ON THIS WATER HEATER DOES NOT
COVER DAMAGE CAUSED FROM OPERATION IN A
CORROSIVE ATMOSPHERE.
Water Damage/Drain Pan - The water heater should be
located in an area where leakage of the tank or connections
will not result in damage to the area adjacent to the water
heater or to lower floors of the structure.
WHEN SUCH
LOCATIONS CANNOT BE AVOIDED, A SUITABLE
DRAIN PAN MUST BE INSTALLED UNDER THE WATER
HEATER HAVING A LENGTH AND WIDTH AT LEAST 3
INCHES GREATER THAN THE DIAMETER OF THE
WATER HEATER, A MAXIMUM HEIGHT OF 1-3/4
INCHES, AND BE PIPED TO AN OPEN DRAIN. DO NOT
RESTRICT THE FLOW OF COMBUSTION AIR. DRAIN
DRAFTHOOD LOCATION & FLUE
DAMPER INSTALLATION
FIGURE4