Takagi 140 Indoor Installation Manual And Owner's Manual page 20

• Adjust the appropriate DIP switches according to vent size and vent length as
shown below. DO NOT adjust the other DIP switches.
• Turn off the power supply to the water heater before changing the DIP
switch settings.
WARNING
• Failure to observe these warnings could lead to carbon monoxide poisoning
or death.
3 inch vent installation
Vent length
5 to 20 ft
(1.5 to 6.0 m)
(DEFAULT)
21 to 40 ft
(6.1 to 12.2 m)
41 to 70 ft
(12.3 to 21.3 m)
4 inch vent installation
Vent length Direct vent and Single vent
5 to 50 ft
(1.5 to 15.2 m)
(DEFAULT)
51 to 100 ft
(15.3 to 30.5 m)
Examples of installation of 3 inch & 4 inch vent
• For details of the optional items, refer to the Installation manual for each optional item.
• For clearance information, refer to pp. pp. 25 to 27.
Direct vent
Hanger
Direct vent
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : ON
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : OFF
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : ON
No. 7 : ON
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : ON
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : OFF
No. 7 : OFF
Horizontal installation
Hanger
Wall
Terminations
20
Vent length
5 to 45 ft
(1.5 to 13.7 m)
(DEFAULT)
46 to 70 ft
(13.8 to 21.3 m)
Computer board
Bank of DIP switches
Single vent with room-air intake
Hanger
Page
Installation Manual
Installation
Single vent
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : ON
No. 7 : OFF
ON 1 2 3 4 5 6 7 8 9 10
OFF
No. 6 : OFF
No. 7 : OFF
Wall
Termination