High Altitude Installations - American Water Heater 300 Series Instruction Manual

EXHAUST (VENT)
ELBOW
CONDENSATE
DRAIN LINE
CONNECTION
CONDENSATE
CLEANOUT CAP
CONDENSATE DRAIN
LINE - FIELD INSTALLED
Figure 12
DO NOT remove the factory installed exhaust/condensate elbow
for any reason, see Figure 12. The water heater's vent pipe is
under a slight positive pressure while unit is in operation. The
water trap inside of the exhaust/condensate elbow prevents flue
gases from escaping into the installed space.
Do not install any external condensate trap. The exhaust elbow
assembly has an internal condensate trap.
CONDENSATE PH LEVEL
The condensate drains from the water heater's covered in this
manual have PH levels between 4.3 and 5.0. Install a commercially
available neutralizing kit if required by local codes.
NOTE: Lower PH levels are acidic. Do not connect a metal drain
line, such as copper, to the water heater for this reason. See
Condensate Drain Installation (page 39).

HIGH ALTITUDE INSTALLATIONS

THIS SIDE VIEW
OF EXHAUST
ELBOW AND
ARROW INDICATE
THE LOCATION OF
THE PRESSURE
PORT
DRAIN LINE TO TERMINATE NO
MORE THAN 6 INCHES (15.2cm)
ABOVE DRAIN
BUILDING
DRAIN
This high efficiency water heater is certified for use without
modification for an altitude of 10,100 feet (3,078 m). Consult the
factory for installation at altitudes over 10,100 feet (3,078 m).
Some gas utility companies derate their gas for altitude, making it
unnecessary to install high altitude orifices. Call the local gas or
utility company to verify BTU content.
Due to the input rate reduction at high altitudes, the output rating
of the water heater is also reduced and should be compensated
for in the sizing of the equipment for applications.
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