TR
OUBLE
SHOO
TING
TR
OUBLE
SHOO
TING
On-Demand Water Heater Service Handbook for 240, 340 & 540 Condensing Models • 27
HIGH ALTITUDE SETTINGS (CONTINUED)
Figure 13 : 240 (T-H3J) and 340 (T-H3S)
Bank of DIP Switches
Table 10: Outdoor model, 240 (T-H3J) / 340 (T-H3S) - Propane
Apply the altitude setting by adjusting DIP switches 3, 4,
and 5 as described below.
Eleva
tion
Level
DIP switch se
ttings
Output
r
eduction
F
an
mo
t
or
speed
chang
e
No.3
No.4
No.5
0 to 2,000
ft.
0 (DEFAULT)
OFF
OFF
OFF
N/A
N/A
1**
OFF
ON
OFF
N/A
3 %
2,000 to 4,000
ft.
2
OFF
OFF
ON
-11 %
7 %
4,000 to 6,000
ft.
3*
ON
OFF
ON
-14 %
9 %
Special
function**
ON
OFF
OFF
N/A
-7 %
Eleva
tion
Level
DIP switch se
ttings
Output
r
eduction
F
an
mo
t
or
speed
chang
e
No.3
No.4
No.5
0 to 2,000
ft.
0 (DEFAULT)
OFF
OFF
OFF
N/A
N/A
1**
OFF
ON
OFF
N/A
6 %
2,000 to 4,000
ft.
2
OFF
OFF
ON
-9 %
14 %
4,000 to 6,000
ft.
3*
ON
OFF
ON
-12 %
18 %
Special
function**
ON
OFF
OFF
N/A
-7 %
Table 11: Outdoor model, 240 (T-H3J) / 340 (T-H3S) - Natural Gas
Apply the altitude setting by adjusting DIP switches 3, 4, and 5 as described below.
* If the abnormal sound problem persists even with “Level 3” setting, please contact our Technical Service Department for
advice.
**These settings are not listed in the 240(T-H3J),340(T-H3S), and 540(T-H3) installation manual.
WARNING
Failure to properly set the DIP switches could cause carbon monoxide
poisoning, resulting in severe personal injury or death.
