Dip Switch Settings For Vent Length - Takagi AT-KJr3U-IN Installation Manual And Owner's Manual

• Improper venting of this appliance can result in excessive levels of carbon
monoxide which can result in severe personal injury or death.
• Improper installation can cause nausea or asphyxiation, severe injury
or death from carbon monoxide and flue gases poisoning. Improper
DANGER
installation will void product warranty.
• Specific DIP switch settings are required depending on the length of your
vent run and the type of vent installation. Refer to the following sections
for details:
DIP switch settings for single pipe with room-air intake
110U Indoor (AT-KJr3U-IN)
310U Indoor (AT-K5U-IN)
ON 1 2 3 4 5 6 7 8 9 10
OFF
Horizontal Installation
Vertical
condensation
drain**
Backflow
preventer*
*Backflow preventer (Recommended for freezing weather conditions: 36 °F (2 °C) and below).
**Vertical condensation drain must be installed in accordance with local codes. It is
ing system when there is more than 5 ft. (1.5 m) of equivalent vent length, not including the sidewall termination. 90° elbow
is equivalent to 5 ft. (1.5 m) of vent length.

-DIP Switch Settings for Vent Length-

• Single Pipe with Room Air (page 20)
• Two-pipe Direct Vent (page 21)
• Vent kit of 9008900005 (page 22)
• Outdoor Installation (page 22)
Single Pipe with Room-Air Intake
510U Indoor (AT-D3U-IN)
(Upper bank of DIP switches)
No. 6 : O N ON 1 2 3 4 5 6 7 8
No. 7 : OFF
OFF
No. 8 : OFF
Hanger
Sidewall vent
termination
No. 3 : O N
No. 4 : OFF
No. 5 : OFF
Vertical Installation
Wall
Hanger
20
Page
Vent length
0 to 60 ft.
(0 to 18.3 m)
Roof
Rain cap
Roof
flashing
Fire stop
Vertical
condensation
drain**
Backflow
preventer*
required to be installed in the vent-