A.O. Smith T-H3-DV Service Manual

67 Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
12-6. DIPswitch settings
The 240 (T-H3J) /340 (T-H3S) Indoor shares the computer
board with the 240 (T-H3J) /340 (T-H3S) Outdoor. The
DIPswitches have certain special funcons as shown
on the following table and generally should not need
adjustment. Carefully verify the funcons of each
DIPswitch before changing any sengs.
No. Functions ON position OFF position
1 Gas type Propane Disable
2 Natural gas Disable
3
4
5
FM+, FM- and Input-
(FM speed is increased automatically. See section 12-13)
6
7
Installation settings
8 N/A N/A N/A
(Default)
9 Output temperature settings
(Default 120 °F)
140 °F (60
°C) 120 °F (49 °C)
(Default)
10 Deactivation of the exhaust temperature control
(This switch is for a specialized purposes only)
Enable Disable
(Default)
DEFAULT
No.3: OFF
NO.4: OFF
No.5: OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
240 (T-H3J) / 340 (T-H3S) models
Bank of DIPswitches
240 (T-H3J) and 340 (T-H3S) models
Computer board
Vent settings (Direct vent Indoor models only)
3" ventings
5 to 20 ft (DEFAULT) 21 to 40 ft 41 to 70 ft
4" ventings
5 to 50 ft (DEFAULT) 51 to 100 ft N/A
No. 6 : ON
No. 7 : OFF
No. 6 : OFF
No. 7 : OFF
No. 6 : ON
No. 7 : ON
Set DIPswitches shown in the table below depending on the vent length.
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1
2
3
4
5
6
7 8
9
10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Outdoor models
No. 6 : OFF
No. 7 : ON
OFF
ON
1
2
3
4
5
6
7 8 9
10
Set DIPswitches shown
in the table below.

A.O. Smith T-H3-DV Specifications

General

Brand	A.O. Smith
Model	T-H3-DV
Category	Water Heater
Language	English