Water Heater Installation Manual

12 Page
HIGH-ALTITUDE INSTALLATIONS
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.
Installaon
Installaon Manual
NOTE: The dark squares indicate the correct DIP switch positions.
540HX3
Lower bank of DIP switches
Bank of DIP switches
240HX3/340HX3
Indoor models
0 to 2,000 ft
(0 to 610 m)
(DEFAULT)
2,001 to
3,000 ft
(611 to 914 m)
3,001 to
5,000 ft
(915 to 1,524 m)
5,001 to
7,500 ft
(1,525 to 2,286 m
7,501 to
10,100 ft
(2,287 to 3,078 m)
240HX3/340HX3
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : OFF
No. 4 : O N
No. 5 : OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : OFF
No. 4 : O N
No. 5 : O N
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : O N
No. 4 : O N
No. 5 : O N
540HX3
(Lower bank of
DIP switches)
OFF
ON
1 2 3 4 5 6
No. 2 : OFF
No. 3 : OFF
No. 4 : OFF
OFF
ON
1 2 3 4 5 6
No. 2 : OFF
No. 3 : O N
No. 4 : OFF
OFF
ON
1 2 3 4 5 6
No. 2 : OFF
No. 3 : OFF
No. 4 : O N
OFF
ON
1 2 3 4 5 6
No. 2 : OFF
No. 3 : O N
No. 4 : O N
OFF
ON
1 2 3 4 5 6
No. 2 : O N
No. 3 : O N
No. 4 : O N
Altitude
DIP switches
Installation altitude
The maximum certified
or allowable installed
altitude is 10,100 ft
(3,078 m) for indoor
models and 6,000 ft
(1,829 m) for outdoor
models.
Outdoor models
0 to 2,000 ft
(0 to 610 m)
(DEFAULT)
2,001 to
4,000 ft
(611 to 1,219 m)
4,001 to
6,000 ft
(1,220 to 1,829 m)
240HX3/340HX3
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : OFF
No. 4 : OFF
No. 5 : O N
OFF
ON
1 2 3 4 5 6 7 8 9 10
No. 3 : O N
No. 4 : OFF
No. 5 : O N
540HX3
(Lower bank of
DIP switches)
OFF
ON
1 2 3 4 5 6
No. 2 : OFF
No. 3 : OFF
No. 4 : OFF
OFF
ON
1 2 3 4 5 6
No. 2 : OFF
No. 3 : OFF
No. 4 : O N
OFF
ON
1 2 3 4 5 6
No. 2 : O N
No. 3 : OFF
No. 4 : O N
Altitude
DIP switches