Outdoor Installation - Takagi AT-KJr3U-IN Installation Manual And Owner's Manual

Horizontal Installation with the 9008900005 vent kit
For the Direct vent kit of 9008900005, set the following DIP switch settings.
110U Indoor (AT-KJr3U-IN)
310U Indoor (AT-K5U-IN)
ON 1 2 3 4 5 6 7 8 9 10
OFF
Single Pipe
with Room-Air Intake
Backflow
preventer*
Vertical
condensation
drain**
*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.
110U Outdoor (AT-KJr3U-OS)
310U Outdoor (AT-K5U-OS)
ON 1 2 3 4 5 6 7 8 9 10
OFF
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 : O N
OFF
No. 8 : OFF
Two-Pipe, Direct-vent
sidewall Installation
Backflow
preventer*
Vertical
condensation
drain**
Outdoor Installation DIP switch settings

Outdoor installation

510U Outdoor (AT-D3U-OS)
(Upper bank of DIP switches)
No. 6 : OFF
ON 1 2 3 4 5 6 7 8
No. 7 : O N
OFF
No. 8 : OFF
22
No. 3 : ON
No. 4 : ON
(0 to 16.8 m)
No. 5 : OFF
3 - 7"
9008899005
(Termination)
2 - 5"
9008900005 (Termination + Thimble)
Covering wall thicknesses
Termination
Wall Thimble
Termination + Thimble
required to be installed in the vent-
No. 3 : OFF
No. 4 : O N
No. 5 : OFF
Page
Installation Manual
Installation
Vent length
0 to 55 ft.
3 - 6"
9008898005
(Wall Thimble)
Part#
9008899005
9008898005
9008900005