User Guide
12 Page
Installaon
Installaon Manual
NOTE: The dark squares indicate the correct DIP switch positions.
110 and 310 models
Altitude
0 to 2,000 ft
(0 to 610 m)
DEFAULT
2,000 to 4,000 ft
(611 to 1,219 m)
4,000 to 6,000 ft
(1,220 to 1,829 m)
Switch No. 3 OFF ON OFF
Switch No. 4 OFF OFF ON
ON
87654321
ON
87654321
ON
87654321
510 model (Left bank of DIP switches)
Altitude
0 to 2,000 ft
(0 to 610 m)
DEFAULT
2,000 to 4,000 ft
(611 to 1,219 m)
4,000 to 6,000 ft
(1,220 to 1,829 m)
Switch No. 4 OFF ON OFF
Switch No. 5 OFF OFF ON
ON
654321
ON
654321
ON
654321
Installation altitude
The maximum certified or allowable installed altitude is 6,000 ft (1,829 m) for indoor and out-
door models.
HIGH-ALTITUDE INSTALLATIONS
Check the altitude where your water heater is installed. Set DIP switches shown in the table below. The
DIP switch settings depend on the altitude.
WARNING
• Adjust the appropriate DIP switches according to model and elevation as
shown below. DO NOT adjust the other DIP switches.
• Turn off the power supply to the water heater before changing the DIP
switch settings.
• Failure to observe these warnings could lead to carbon monoxide poisoning
or death.
110 and 310 models
Computer board
DIP switches
510 model
Computer board