Dip Switch Settings - A.O. Smith GTS-305-NE Service Manual

100/101 and 200/201 Series
SW1 Bank
OFF - "Long Flue"
ON - "Short Flue" and Outdoor Models
"Long flue" is defined as:
1
0 elbows and length is greater than 21 ft
1 elbow and length is greater than 15 ft
2 elbows and length is greater than 9 ft
2
Settings dependent on altitude
3
0-2000 ft 2001-5200 ft
(0-610 m) (610-1585 m)
#2: OFF #2: OFF
#3: OFF #3: ON
4 OFF - if using standard controller
OFF - 120ºF default temperature without a
controller
5
ON - 140ºF default temperature without a
controller
6 OFF position
OFF position - Used for low fire and high fire
7
settings. Refer to the gas pressure setting
8
procedure.
On-Demand Gas Tankless Water Heater Service Manual

Dip Switch Settings

5201-7700 ft 7701-10200 ft
(1585-2347 m) (2347-3109 m)
#2: ON #2: ON
#3: OFF #3: ON
SW2 Bank (present on replacement PC boards only)
OFF - Propane Gas
1
ON - Natural Gas
OFF - Outdoor model
2
ON - Indoor model
OFF - 305e, 305i, 505e, 505i, 705e/o (ASME),
3
705i (ASME)
OFF - 505e/o, 505i, 705e/o (ASME), 705i (ASME)
4
ON - 305e/o, 305i
OFF - 305e, 305i, 505e, 505i,
5
705e/o (ASME), 705i (ASME)
6 OFF position
58