TR
OUBLE
SHOO
TING
TR
OUBLE
SHOO
TING
28 • On-Demand Water Heater Service Handbook for 240, 340 & 540 Condensing Models
HIGH ALTITUDE SETTINGS (CONTINUED)
Eleva
tion
Level
DIP switch se
ttings
Output
r
eduction
F
an
mo
t
or
speed
chang
e
No.2
No.3
No.4
0 to 2,000
ft.
0(DEFAULT)
OFF
OFF
OFF
N/A
N/A
2,000 to 3,000
ft.
1
OFF
ON
OFF
N/A
3 %
3,000 to 5,000
ft.
2*
ON
ON
OFF
-8 %
5 %
3
OFF
OFF
ON
-11 %
7 %
5,000 to 7,500
ft.
4*
ON
OFF
ON
-14 %
9 %
5
OFF
ON
ON
-18 %
12 %
7,500 to 10,100
ft.
6
ON
ON
ON
-22 %
15 %
Special
function
*
ON
OFF
OFF
N/A
-7%
Table 12: Indoor model, 540 (T-H3) - Propane
Apply the altitude setting by adjusting DIP switches 2, 3, and 4 on
the lower bank. See Figure 14.
Figure 14
Lower bank of
DIP switches
: 540 (T-H3)
Eleva
tion
Level
DIP switch se
ttings
Output
r
eduction
F
an
mo
t
or
speed
chang
e
No.2
No.3
No.4
0
to
2,000
ft.
0(DEFAULT)
OFF
OFF
OFF
N/A
N/A
2,000 to 3,000
ft.
1
OFF
ON
OFF
N/A
6%
3,000 to 5,000
ft.
2*
ON
ON
OFF
-6 %
10 %
3
OFF
OFF
ON
-9 %
14 %
5,000 to 7,500
ft.
4*
ON
OFF
ON
-12 %
18 %
5
OFF
ON
ON
-15 %
22 %
7,500 to 10,100
ft.
6
ON
ON
ON
-18 %
26 %
Special
function
*
ON
OFF
OFF
N/A
-7 %
Table 13: Indoor model, 540 (T-H3) - Natural Gas
Apply the altitude setting by adjusting DIP switches 2, 3, and 4 on the lower bank. See Figure 14.
* **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.
