79
Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
12-13. High-Altitude Region Support Functions
The high-altitude region support functions have four
operation levels, with the appropriate level being set up
by the installer until the abnormal sound problem is solved.
The desired level can be specified at the bank of DIPswitches
(No.3 , No.4 and No.5) on the computer board. See the table
below.
<Using these functions>
Indoor models of 240 (T-H3J) / 340 (T-H3S) : Propane
Level
Elevation
Output
reduction
Fan motor
speed change
DIPswitch settings
No.3
No.4
No.5
0
0 (DEFAULT)
N/A
N/A
OFF
OFF
OFF
1
Up to
2,500 ft
N/A
3 %
OFF
ON
OFF
2
Up to
5,000 ft
-8 %
5 %
ON
ON
OFF
-11 %
7 %
OFF
OFF
ON
3
Up to
7,500 ft
-14 %
9 %
ON
OFF
ON
-18 %
12 %
OFF
ON
ON
4
Up to
10,100 ft
-22 %
15 %
ON
ON
ON
Special function
N/A
-7%
ON
OFF
OFF
Bank of DIPswitches
240 (T-H3J) and 340 (T-H3S) models
Computer board
Indoor models of 240 (T-H3J) / 340 (T-H3S) : Natural gas
Level
Elevation
Output
reduction
Fan motor
speed change
DIPswitch settings
No.3
No.4
No.5
0
0 (DEFAULT)
N/A
N/A
OFF
OFF
OFF
1
Up to
2,500 ft
N/A
6%
OFF
ON
OFF
2
Up to
5,000 ft
-6 %
10 %
ON
ON
OFF
-9 %
14 %
OFF
OFF
ON
3
Up to
7,500 ft
-12 %
18 %
ON
OFF
ON
-15 %
22 %
OFF
ON
ON
4
Up to
10,100 ft
-18 %
26 %
ON
ON
ON
Special function
N/A
-7 %
ON
OFF
OFF
