TR
OUBLE
SHOO
TING
TR
OUBLE
SHOO
TING
26 • On-Demand Water Heater Service Handbook for 240, 340 & 540 Condensing Models
HIGH ALTITUDE SETTINGS
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
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 8: Indoor 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
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 %
*The se
ttings
are not listed in the Installa
tion
Manual of 240(T-H3J),340(T-H3S), and 540(T-H3)
models.
Table 9:
Indoor model, 240 (T-H3J) / 340 (T-H3S) - Natural Gas
Apply the altitude setting by adjusting DIP switches 3, 4, and 5 as described below.
By default, all models are set to operate at altitudes of up to
2,000 feet. However, the altitude settings can be adjusted as
described in the following pages.
WARNING
Failure to properly set the DIP switches could cause carbon monoxide
poisoning, resulting in severe personal injury or death.
: 240 (T-H3J) and 340 (T-H3S)
Bank of DIP Switches
Figure 12
