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HIGH-ALTITUDE INSTALLATIONS
Check the elevation where your water heater is installed. Set DIPswitches shown in the table below
depending on the altitude.
WARNING
DO NOT adjust any DIPswitches on the upper bank for the 540 (T-H3)
models.
Installaon
Installaon Manual
NOTE: The dark squares indicate the direction the DIPswitches should be set to.
540 (T-H3) models
Computer board
Lower bank of DIPswitches
Outdoor models
0 (DEFAULT) Up to 2,000 ft Up to 4,000 ft Up to 6,000 ft Over 6,000 ft
240 (T-H3J) and
340 (T-H3S) models
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
No. 3 : OFF
No. 4 : ON
No. 5 : OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
No. 3 : ON
No. 4 : OFF
No. 5 : ON
Consult our
Technical
Services
at 1-877-
737-2840
540 (T-H3) models
(Lower bank of
DIPswitches)
No. 2 : OFF
No. 3 : OFF
No. 4 : OFF
No. 2 : OFF
No. 3 : ON
No. 4 : OFF
No. 2 : OFF
No. 3 : OFF
No. 4 : ON
No. 2 : ON
No. 3 : OFF
No. 4 : ON
OFF
ON
OFF
ON
ON
OFF
ON
ON
ON
ON
ON
Altitude
DIPswitches
Bank of DIPswitches
240 (T-H3J) and 340 (T-H3S) models
Computer board
Indoor models
0 (DEFAULT) Up to 2,500 ft Up to 5,000 ft Up to 7,500 ft Up to 10,100 ft
240 (T-H3J) and
340 (T-H3S) models
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
No. 3 : OFF
No. 4 : ON
No. 5 : OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
No. 3 : OFF
No. 4 : ON
No. 5 : ON
No. 3 : ON
No. 4 : ON
No. 5 : ON
540 (T-H3) models
(Lower bank of
DIPswitches)
No. 2 : OFF
No. 3 : OFF
No. 4 : OFF
No. 2 : OFF
No. 3 : ON
No. 4 : OFF
No. 2 : OFF
No. 3 : OFF
No. 4 : ON
No. 2 : OFF
No. 3 : ON
No. 4 : ON
No. 2 : ON
No. 3 : ON
No. 4 : ON
ON
ON
ON
ON
ON
ON
ON
ON
Altitude
DIPswitches
ON
ON
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